/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/mult-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:45:05,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:45:05,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:45:05,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:45:05,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 12:45:05,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 12:45:05,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 12:45:05,233 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 [2021-08-21 12:45:05,269 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:45:05,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:45:05,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:45:05,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:45:05,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:45:05,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:45:05,273 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:45:05,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:45:05,273 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:45:05,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:45:05,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:45:05,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:45:05,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:45:05,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:45:05,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:45:05,294 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:45:05,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:45:05,294 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:45:05,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:45:05,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:45:05,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:45:05,295 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:45:05,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:45:05,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:45:05,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:45:05,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:45:05,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:45:05,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:45:05,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:45:05,296 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:45:05,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:45:05,296 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:45:05,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:45:05,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:45:05,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:45:05,681 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:45:05,682 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:45:05,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl [2021-08-21 12:45:05,692 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl' [2021-08-21 12:45:05,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:45:05,740 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:45:05,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:45:05,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:45:05,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:45:05,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:05" (1/1) ... [2021-08-21 12:45:05,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:05" (1/1) ... [2021-08-21 12:45:05,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:45:05,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:45:05,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:45:05,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:45:05,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:05" (1/1) ... [2021-08-21 12:45:05,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:05" (1/1) ... [2021-08-21 12:45:05,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:05" (1/1) ... [2021-08-21 12:45:05,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:05" (1/1) ... [2021-08-21 12:45:05,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:05" (1/1) ... [2021-08-21 12:45:05,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:05" (1/1) ... [2021-08-21 12:45:05,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:05" (1/1) ... [2021-08-21 12:45:05,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:45:05,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:45:05,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:45:05,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:45:05,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:05" (1/1) ... [2021-08-21 12:45:05,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:45:05,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:05,849 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) [2021-08-21 12:45:05,852 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 [2021-08-21 12:45:05,887 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:45:05,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:45:05,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:45:05,888 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:45:05,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:45:05,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:45:05,888 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:45:05,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:45:05,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:45:05,888 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:45:05,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:45:05,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:45:05,890 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 12:45:05,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 12:45:05,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 12:45:05,892 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:45:06,069 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:45:06,069 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:45:06,071 INFO L202 PluginConnector]: Adding new model mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:45:06 BoogieIcfgContainer [2021-08-21 12:45:06,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:45:06,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:45:06,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:45:06,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:45:06,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:05" (1/2) ... [2021-08-21 12:45:06,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3127eb26 and model type mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:45:06, skipping insertion in model container [2021-08-21 12:45:06,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:45:06" (2/2) ... [2021-08-21 12:45:06,078 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-4.wvr.bpl [2021-08-21 12:45:06,083 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:45:06,083 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:45:06,083 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:45:06,083 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:45:06,125 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-21 12:45:06,161 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:45:06,166 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-21 12:45:06,166 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-21 12:45:06,176 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 36 transitions, 104 flow [2021-08-21 12:45:06,285 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 432 states, 431 states have (on average 3.8422273781902554) internal successors, (1656), 431 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:06,290 INFO L276 IsEmpty]: Start isEmpty. Operand has 432 states, 431 states have (on average 3.8422273781902554) internal successors, (1656), 431 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:06,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:45:06,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:06,308 INFO L512 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] [2021-08-21 12:45:06,308 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:06,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2108123221, now seen corresponding path program 1 times [2021-08-21 12:45:06,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:06,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114915494] [2021-08-21 12:45:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:06,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:06,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:06,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114915494] [2021-08-21 12:45:06,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114915494] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:45:06,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:45:06,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:45:06,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804311177] [2021-08-21 12:45:06,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:45:06,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:06,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:45:06,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:45:06,484 INFO L87 Difference]: Start difference. First operand has 432 states, 431 states have (on average 3.8422273781902554) internal successors, (1656), 431 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:06,536 INFO L93 Difference]: Finished difference Result 857 states and 3120 transitions. [2021-08-21 12:45:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:45:06,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:45:06,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:06,558 INFO L225 Difference]: With dead ends: 857 [2021-08-21 12:45:06,558 INFO L226 Difference]: Without dead ends: 732 [2021-08-21 12:45:06,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:45:06,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-08-21 12:45:06,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 698. [2021-08-21 12:45:06,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 3.720229555236729) internal successors, (2593), 697 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2593 transitions. [2021-08-21 12:45:06,670 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2593 transitions. Word has length 22 [2021-08-21 12:45:06,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:06,673 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 2593 transitions. [2021-08-21 12:45:06,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:06,673 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2593 transitions. [2021-08-21 12:45:06,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:45:06,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:06,683 INFO L512 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] [2021-08-21 12:45:06,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:45:06,684 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:06,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:06,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1934695763, now seen corresponding path program 1 times [2021-08-21 12:45:06,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:06,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110133754] [2021-08-21 12:45:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:06,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:06,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:06,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110133754] [2021-08-21 12:45:06,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110133754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:06,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910893295] [2021-08-21 12:45:06,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:06,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:06,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:06,865 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) [2021-08-21 12:45:06,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:45:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:06,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:45:06,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:07,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910893295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:07,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:07,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-08-21 12:45:07,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852331242] [2021-08-21 12:45:07,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:45:07,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:07,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:45:07,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:45:07,198 INFO L87 Difference]: Start difference. First operand 698 states and 2593 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:07,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:07,284 INFO L93 Difference]: Finished difference Result 1528 states and 5659 transitions. [2021-08-21 12:45:07,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:45:07,285 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:45:07,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:07,298 INFO L225 Difference]: With dead ends: 1528 [2021-08-21 12:45:07,298 INFO L226 Difference]: Without dead ends: 1528 [2021-08-21 12:45:07,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:45:07,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-08-21 12:45:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 838. [2021-08-21 12:45:07,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.771804062126643) internal successors, (3157), 837 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:07,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 3157 transitions. [2021-08-21 12:45:07,344 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 3157 transitions. Word has length 24 [2021-08-21 12:45:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:07,344 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 3157 transitions. [2021-08-21 12:45:07,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:07,345 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 3157 transitions. [2021-08-21 12:45:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:45:07,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:07,348 INFO L512 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] [2021-08-21 12:45:07,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:07,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:07,570 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:07,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:07,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1365945047, now seen corresponding path program 1 times [2021-08-21 12:45:07,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:07,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718859424] [2021-08-21 12:45:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:07,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:07,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:07,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718859424] [2021-08-21 12:45:07,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718859424] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:45:07,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:45:07,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:45:07,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781005850] [2021-08-21 12:45:07,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:45:07,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:07,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:45:07,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:45:07,628 INFO L87 Difference]: Start difference. First operand 838 states and 3157 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:07,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:07,678 INFO L93 Difference]: Finished difference Result 932 states and 3374 transitions. [2021-08-21 12:45:07,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:45:07,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:45:07,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:07,684 INFO L225 Difference]: With dead ends: 932 [2021-08-21 12:45:07,684 INFO L226 Difference]: Without dead ends: 822 [2021-08-21 12:45:07,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:45:07,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-08-21 12:45:07,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 806. [2021-08-21 12:45:07,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.7950310559006213) internal successors, (3055), 805 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 3055 transitions. [2021-08-21 12:45:07,731 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 3055 transitions. Word has length 24 [2021-08-21 12:45:07,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:07,732 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 3055 transitions. [2021-08-21 12:45:07,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:07,732 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 3055 transitions. [2021-08-21 12:45:07,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:45:07,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:07,735 INFO L512 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] [2021-08-21 12:45:07,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:45:07,736 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:07,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:07,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1105199987, now seen corresponding path program 2 times [2021-08-21 12:45:07,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:07,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117436788] [2021-08-21 12:45:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:07,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:07,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:07,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117436788] [2021-08-21 12:45:07,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117436788] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:45:07,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:45:07,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:45:07,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64755298] [2021-08-21 12:45:07,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:45:07,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:07,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:45:07,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:45:07,799 INFO L87 Difference]: Start difference. First operand 806 states and 3055 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:07,839 INFO L93 Difference]: Finished difference Result 1023 states and 3746 transitions. [2021-08-21 12:45:07,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:45:07,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:45:07,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:07,847 INFO L225 Difference]: With dead ends: 1023 [2021-08-21 12:45:07,847 INFO L226 Difference]: Without dead ends: 1023 [2021-08-21 12:45:07,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:45:07,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-08-21 12:45:07,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 848. [2021-08-21 12:45:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.7485242030696577) internal successors, (3175), 847 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 3175 transitions. [2021-08-21 12:45:07,880 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 3175 transitions. Word has length 24 [2021-08-21 12:45:07,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:07,880 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 3175 transitions. [2021-08-21 12:45:07,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:07,880 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 3175 transitions. [2021-08-21 12:45:07,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:45:07,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:07,883 INFO L512 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] [2021-08-21 12:45:07,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 12:45:07,884 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:07,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:07,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1733484731, now seen corresponding path program 2 times [2021-08-21 12:45:07,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:07,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65701536] [2021-08-21 12:45:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:07,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:07,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:07,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65701536] [2021-08-21 12:45:07,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65701536] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:45:07,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:45:07,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:45:07,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101436440] [2021-08-21 12:45:07,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:45:07,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:07,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:45:07,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:45:07,940 INFO L87 Difference]: Start difference. First operand 848 states and 3175 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:07,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:07,983 INFO L93 Difference]: Finished difference Result 1251 states and 4590 transitions. [2021-08-21 12:45:07,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:45:07,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:45:07,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:07,992 INFO L225 Difference]: With dead ends: 1251 [2021-08-21 12:45:07,992 INFO L226 Difference]: Without dead ends: 1181 [2021-08-21 12:45:07,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:45:07,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-08-21 12:45:08,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 850. [2021-08-21 12:45:08,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.7703180212014136) internal successors, (3201), 849 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 3201 transitions. [2021-08-21 12:45:08,024 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 3201 transitions. Word has length 24 [2021-08-21 12:45:08,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:08,025 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 3201 transitions. [2021-08-21 12:45:08,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 3201 transitions. [2021-08-21 12:45:08,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:45:08,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:08,028 INFO L512 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] [2021-08-21 12:45:08,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 12:45:08,028 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:08,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:08,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1394405233, now seen corresponding path program 3 times [2021-08-21 12:45:08,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:08,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86427467] [2021-08-21 12:45:08,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:08,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:08,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:08,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86427467] [2021-08-21 12:45:08,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86427467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:08,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441377259] [2021-08-21 12:45:08,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:45:08,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:08,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:08,097 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) [2021-08-21 12:45:08,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:45:08,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:45:08,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:08,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:45:08,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:08,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441377259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:08,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:08,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-08-21 12:45:08,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782384445] [2021-08-21 12:45:08,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:45:08,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:08,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:45:08,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:45:08,304 INFO L87 Difference]: Start difference. First operand 850 states and 3201 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-08-21 12:45:08,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:08,367 INFO L93 Difference]: Finished difference Result 872 states and 3322 transitions. [2021-08-21 12:45:08,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:45:08,368 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 24 [2021-08-21 12:45:08,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:08,374 INFO L225 Difference]: With dead ends: 872 [2021-08-21 12:45:08,374 INFO L226 Difference]: Without dead ends: 822 [2021-08-21 12:45:08,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:45:08,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-08-21 12:45:08,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 702. [2021-08-21 12:45:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 3.843081312410842) internal successors, (2694), 701 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 2694 transitions. [2021-08-21 12:45:08,409 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 2694 transitions. Word has length 24 [2021-08-21 12:45:08,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:08,409 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 2694 transitions. [2021-08-21 12:45:08,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-08-21 12:45:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 2694 transitions. [2021-08-21 12:45:08,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:45:08,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:08,413 INFO L512 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] [2021-08-21 12:45:08,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:08,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-21 12:45:08,626 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:08,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:08,627 INFO L82 PathProgramCache]: Analyzing trace with hash -572986893, now seen corresponding path program 1 times [2021-08-21 12:45:08,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:08,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906347035] [2021-08-21 12:45:08,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:08,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:08,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:08,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906347035] [2021-08-21 12:45:08,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906347035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:08,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877459245] [2021-08-21 12:45:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:08,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:08,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:08,713 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) [2021-08-21 12:45:08,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:45:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:08,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:45:08,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:08,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877459245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:08,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:08,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-08-21 12:45:08,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403728086] [2021-08-21 12:45:08,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:45:08,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:08,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:45:08,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:45:08,875 INFO L87 Difference]: Start difference. First operand 702 states and 2694 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-08-21 12:45:08,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:08,928 INFO L93 Difference]: Finished difference Result 926 states and 3582 transitions. [2021-08-21 12:45:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:45:08,929 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 26 [2021-08-21 12:45:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:08,935 INFO L225 Difference]: With dead ends: 926 [2021-08-21 12:45:08,935 INFO L226 Difference]: Without dead ends: 926 [2021-08-21 12:45:08,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:45:08,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-08-21 12:45:08,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 802. [2021-08-21 12:45:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.857677902621723) internal successors, (3090), 801 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 3090 transitions. [2021-08-21 12:45:08,961 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 3090 transitions. Word has length 26 [2021-08-21 12:45:08,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:08,961 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 3090 transitions. [2021-08-21 12:45:08,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-08-21 12:45:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 3090 transitions. [2021-08-21 12:45:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:45:08,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:08,964 INFO L512 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] [2021-08-21 12:45:08,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:09,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:09,187 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:09,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:09,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1469044683, now seen corresponding path program 1 times [2021-08-21 12:45:09,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:09,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056222535] [2021-08-21 12:45:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:09,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:09,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:09,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056222535] [2021-08-21 12:45:09,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056222535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:09,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329401816] [2021-08-21 12:45:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:09,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:09,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:09,297 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) [2021-08-21 12:45:09,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:45:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:09,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:45:09,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:45:09,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329401816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:09,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:09,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-08-21 12:45:09,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547976470] [2021-08-21 12:45:09,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:45:09,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:09,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:45:09,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:45:09,517 INFO L87 Difference]: Start difference. First operand 802 states and 3090 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:09,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:09,626 INFO L93 Difference]: Finished difference Result 1509 states and 5726 transitions. [2021-08-21 12:45:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:45:09,627 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:45:09,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:09,637 INFO L225 Difference]: With dead ends: 1509 [2021-08-21 12:45:09,637 INFO L226 Difference]: Without dead ends: 1509 [2021-08-21 12:45:09,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:45:09,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-08-21 12:45:09,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 953. [2021-08-21 12:45:09,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.889705882352941) internal successors, (3703), 952 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3703 transitions. [2021-08-21 12:45:09,675 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3703 transitions. Word has length 28 [2021-08-21 12:45:09,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:09,675 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 3703 transitions. [2021-08-21 12:45:09,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3703 transitions. [2021-08-21 12:45:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:45:09,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:09,679 INFO L512 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] [2021-08-21 12:45:09,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:09,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:09,897 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:09,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:09,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1066409119, now seen corresponding path program 2 times [2021-08-21 12:45:09,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:09,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635035126] [2021-08-21 12:45:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:09,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:10,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:10,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635035126] [2021-08-21 12:45:10,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635035126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:10,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144691696] [2021-08-21 12:45:10,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:45:10,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:10,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:10,036 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) [2021-08-21 12:45:10,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:45:10,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:45:10,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:10,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:45:10,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:45:10,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144691696] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:45:10,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 12:45:10,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-08-21 12:45:10,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152674579] [2021-08-21 12:45:10,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:45:10,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:10,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:45:10,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:45:10,331 INFO L87 Difference]: Start difference. First operand 953 states and 3703 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:10,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:10,377 INFO L93 Difference]: Finished difference Result 1136 states and 4368 transitions. [2021-08-21 12:45:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:45:10,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:45:10,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:10,385 INFO L225 Difference]: With dead ends: 1136 [2021-08-21 12:45:10,385 INFO L226 Difference]: Without dead ends: 1088 [2021-08-21 12:45:10,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:45:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-08-21 12:45:10,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 937. [2021-08-21 12:45:10,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.8792735042735043) internal successors, (3631), 936 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:10,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3631 transitions. [2021-08-21 12:45:10,414 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3631 transitions. Word has length 28 [2021-08-21 12:45:10,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:10,415 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3631 transitions. [2021-08-21 12:45:10,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3631 transitions. [2021-08-21 12:45:10,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:45:10,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:10,418 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:10,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:10,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:10,633 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:10,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:10,633 INFO L82 PathProgramCache]: Analyzing trace with hash 364472883, now seen corresponding path program 1 times [2021-08-21 12:45:10,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:10,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655442445] [2021-08-21 12:45:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:10,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:10,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:10,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655442445] [2021-08-21 12:45:10,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655442445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:10,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365713303] [2021-08-21 12:45:10,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:10,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:10,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:10,718 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) [2021-08-21 12:45:10,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:45:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:10,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:45:10,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:11,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365713303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:11,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:11,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-21 12:45:11,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496528790] [2021-08-21 12:45:11,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:45:11,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:11,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:45:11,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:45:11,061 INFO L87 Difference]: Start difference. First operand 937 states and 3631 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:11,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:11,197 INFO L93 Difference]: Finished difference Result 4025 states and 15417 transitions. [2021-08-21 12:45:11,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:45:11,198 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:45:11,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:11,241 INFO L225 Difference]: With dead ends: 4025 [2021-08-21 12:45:11,241 INFO L226 Difference]: Without dead ends: 3705 [2021-08-21 12:45:11,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:45:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2021-08-21 12:45:11,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 2630. [2021-08-21 12:45:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 3.9790794979079496) internal successors, (10461), 2629 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:11,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 10461 transitions. [2021-08-21 12:45:11,350 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 10461 transitions. Word has length 30 [2021-08-21 12:45:11,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:11,350 INFO L470 AbstractCegarLoop]: Abstraction has 2630 states and 10461 transitions. [2021-08-21 12:45:11,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:11,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 10461 transitions. [2021-08-21 12:45:11,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:45:11,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:11,361 INFO L512 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, 1] [2021-08-21 12:45:11,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:11,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:11,581 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:11,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1940569807, now seen corresponding path program 2 times [2021-08-21 12:45:11,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:11,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879871784] [2021-08-21 12:45:11,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:11,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:11,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:11,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879871784] [2021-08-21 12:45:11,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879871784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:11,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346418094] [2021-08-21 12:45:11,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:45:11,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:11,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:11,647 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) [2021-08-21 12:45:11,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:45:11,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:45:11,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:11,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:45:11,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:11,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346418094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:11,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:11,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-21 12:45:11,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571763820] [2021-08-21 12:45:11,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:45:11,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:11,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:45:11,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:45:11,923 INFO L87 Difference]: Start difference. First operand 2630 states and 10461 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:12,112 INFO L93 Difference]: Finished difference Result 8927 states and 34364 transitions. [2021-08-21 12:45:12,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:45:12,113 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:45:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:12,206 INFO L225 Difference]: With dead ends: 8927 [2021-08-21 12:45:12,207 INFO L226 Difference]: Without dead ends: 8927 [2021-08-21 12:45:12,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:45:12,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8927 states. [2021-08-21 12:45:12,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8927 to 4060. [2021-08-21 12:45:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 4059 states have (on average 4.138950480413895) internal successors, (16800), 4059 states have internal predecessors, (16800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 16800 transitions. [2021-08-21 12:45:12,430 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 16800 transitions. Word has length 32 [2021-08-21 12:45:12,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:12,430 INFO L470 AbstractCegarLoop]: Abstraction has 4060 states and 16800 transitions. [2021-08-21 12:45:12,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 16800 transitions. [2021-08-21 12:45:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:45:12,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:12,446 INFO L512 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, 1] [2021-08-21 12:45:12,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:12,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:12,665 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:12,665 INFO L82 PathProgramCache]: Analyzing trace with hash 706983797, now seen corresponding path program 3 times [2021-08-21 12:45:12,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:12,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003035128] [2021-08-21 12:45:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:12,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:12,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:12,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003035128] [2021-08-21 12:45:12,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003035128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:12,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809588535] [2021-08-21 12:45:12,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:45:12,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:12,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:12,715 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) [2021-08-21 12:45:12,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:45:12,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:45:12,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:12,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:45:12,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:45:13,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809588535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:13,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:13,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 12:45:13,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891033976] [2021-08-21 12:45:13,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:45:13,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:13,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:45:13,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:45:13,031 INFO L87 Difference]: Start difference. First operand 4060 states and 16800 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:13,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:13,790 INFO L93 Difference]: Finished difference Result 15078 states and 59451 transitions. [2021-08-21 12:45:13,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:45:13,791 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:45:13,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:13,865 INFO L225 Difference]: With dead ends: 15078 [2021-08-21 12:45:13,865 INFO L226 Difference]: Without dead ends: 13577 [2021-08-21 12:45:13,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 373.6ms TimeCoverageRelationStatistics Valid=357, Invalid=1203, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:45:13,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13577 states. [2021-08-21 12:45:14,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13577 to 7732. [2021-08-21 12:45:14,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7732 states, 7731 states have (on average 4.210322079937912) internal successors, (32550), 7731 states have internal predecessors, (32550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7732 states to 7732 states and 32550 transitions. [2021-08-21 12:45:14,280 INFO L78 Accepts]: Start accepts. Automaton has 7732 states and 32550 transitions. Word has length 32 [2021-08-21 12:45:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:14,281 INFO L470 AbstractCegarLoop]: Abstraction has 7732 states and 32550 transitions. [2021-08-21 12:45:14,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 7732 states and 32550 transitions. [2021-08-21 12:45:14,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:45:14,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:14,308 INFO L512 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, 1] [2021-08-21 12:45:14,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:14,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-21 12:45:14,525 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:14,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:14,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1468605159, now seen corresponding path program 4 times [2021-08-21 12:45:14,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:14,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536975427] [2021-08-21 12:45:14,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:14,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:14,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:14,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536975427] [2021-08-21 12:45:14,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536975427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:14,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121211229] [2021-08-21 12:45:14,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:45:14,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:14,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:14,662 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) [2021-08-21 12:45:14,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:45:14,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:45:14,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:14,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:45:14,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:14,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121211229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:14,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:14,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-08-21 12:45:14,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292813535] [2021-08-21 12:45:14,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:45:14,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:14,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:45:14,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:45:14,973 INFO L87 Difference]: Start difference. First operand 7732 states and 32550 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:15,112 INFO L93 Difference]: Finished difference Result 10612 states and 42670 transitions. [2021-08-21 12:45:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:45:15,113 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:45:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:15,207 INFO L225 Difference]: With dead ends: 10612 [2021-08-21 12:45:15,208 INFO L226 Difference]: Without dead ends: 10444 [2021-08-21 12:45:15,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:45:15,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10444 states. [2021-08-21 12:45:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10444 to 7659. [2021-08-21 12:45:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7659 states, 7658 states have (on average 4.165186732828415) internal successors, (31897), 7658 states have internal predecessors, (31897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:15,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7659 states to 7659 states and 31897 transitions. [2021-08-21 12:45:15,552 INFO L78 Accepts]: Start accepts. Automaton has 7659 states and 31897 transitions. Word has length 32 [2021-08-21 12:45:15,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:15,552 INFO L470 AbstractCegarLoop]: Abstraction has 7659 states and 31897 transitions. [2021-08-21 12:45:15,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:15,552 INFO L276 IsEmpty]: Start isEmpty. Operand 7659 states and 31897 transitions. [2021-08-21 12:45:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:45:15,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:15,594 INFO L512 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, 1] [2021-08-21 12:45:15,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:15,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 12:45:15,819 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:15,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:15,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1299192005, now seen corresponding path program 5 times [2021-08-21 12:45:15,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:15,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890376736] [2021-08-21 12:45:15,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:15,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:15,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:15,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890376736] [2021-08-21 12:45:15,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890376736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:15,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808624960] [2021-08-21 12:45:15,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:45:15,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:15,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:15,897 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) [2021-08-21 12:45:15,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:45:16,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:45:16,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:16,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:45:16,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:16,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808624960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:16,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:16,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-08-21 12:45:16,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158921606] [2021-08-21 12:45:16,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:45:16,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:16,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:45:16,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:45:16,304 INFO L87 Difference]: Start difference. First operand 7659 states and 31897 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:16,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:16,524 INFO L93 Difference]: Finished difference Result 15866 states and 64411 transitions. [2021-08-21 12:45:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:45:16,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:45:16,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:16,606 INFO L225 Difference]: With dead ends: 15866 [2021-08-21 12:45:16,606 INFO L226 Difference]: Without dead ends: 15866 [2021-08-21 12:45:16,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:45:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15866 states. [2021-08-21 12:45:17,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15866 to 9251. [2021-08-21 12:45:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9251 states, 9250 states have (on average 4.2796756756756755) internal successors, (39587), 9250 states have internal predecessors, (39587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:17,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9251 states to 9251 states and 39587 transitions. [2021-08-21 12:45:17,093 INFO L78 Accepts]: Start accepts. Automaton has 9251 states and 39587 transitions. Word has length 32 [2021-08-21 12:45:17,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:17,094 INFO L470 AbstractCegarLoop]: Abstraction has 9251 states and 39587 transitions. [2021-08-21 12:45:17,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 9251 states and 39587 transitions. [2021-08-21 12:45:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:45:17,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:17,122 INFO L512 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, 1] [2021-08-21 12:45:17,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:17,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 12:45:17,338 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:17,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:17,339 INFO L82 PathProgramCache]: Analyzing trace with hash 884732173, now seen corresponding path program 6 times [2021-08-21 12:45:17,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:17,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084329587] [2021-08-21 12:45:17,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:17,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:17,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:17,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084329587] [2021-08-21 12:45:17,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084329587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:17,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942661414] [2021-08-21 12:45:17,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:45:17,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:17,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:17,389 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) [2021-08-21 12:45:17,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:45:17,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:45:17,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:17,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:45:17,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:45:17,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942661414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:17,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:17,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-08-21 12:45:17,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059090246] [2021-08-21 12:45:17,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:45:17,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:17,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:45:17,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:45:17,715 INFO L87 Difference]: Start difference. First operand 9251 states and 39587 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:17,945 INFO L93 Difference]: Finished difference Result 14150 states and 57257 transitions. [2021-08-21 12:45:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:45:17,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:45:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:18,001 INFO L225 Difference]: With dead ends: 14150 [2021-08-21 12:45:18,002 INFO L226 Difference]: Without dead ends: 13838 [2021-08-21 12:45:18,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:45:18,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13838 states. [2021-08-21 12:45:18,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13838 to 8957. [2021-08-21 12:45:18,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8957 states, 8956 states have (on average 4.271661456007146) internal successors, (38257), 8956 states have internal predecessors, (38257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8957 states to 8957 states and 38257 transitions. [2021-08-21 12:45:18,459 INFO L78 Accepts]: Start accepts. Automaton has 8957 states and 38257 transitions. Word has length 32 [2021-08-21 12:45:18,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:18,459 INFO L470 AbstractCegarLoop]: Abstraction has 8957 states and 38257 transitions. [2021-08-21 12:45:18,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:18,459 INFO L276 IsEmpty]: Start isEmpty. Operand 8957 states and 38257 transitions. [2021-08-21 12:45:18,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:45:18,487 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:18,487 INFO L512 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, 1] [2021-08-21 12:45:18,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:18,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 12:45:18,701 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:18,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1788915635, now seen corresponding path program 7 times [2021-08-21 12:45:18,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:18,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540950841] [2021-08-21 12:45:18,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:18,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:18,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:18,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540950841] [2021-08-21 12:45:18,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540950841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:18,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39122451] [2021-08-21 12:45:18,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:45:18,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:18,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:18,756 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) [2021-08-21 12:45:18,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:45:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:18,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:45:18,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:19,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39122451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:19,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:19,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-21 12:45:19,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041833893] [2021-08-21 12:45:19,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:45:19,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:19,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:45:19,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:45:19,098 INFO L87 Difference]: Start difference. First operand 8957 states and 38257 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:19,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:19,388 INFO L93 Difference]: Finished difference Result 16495 states and 69502 transitions. [2021-08-21 12:45:19,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:45:19,388 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:45:19,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:19,461 INFO L225 Difference]: With dead ends: 16495 [2021-08-21 12:45:19,461 INFO L226 Difference]: Without dead ends: 16099 [2021-08-21 12:45:19,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:45:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16099 states. [2021-08-21 12:45:19,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16099 to 12463. [2021-08-21 12:45:19,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12463 states, 12462 states have (on average 4.367116032739528) internal successors, (54423), 12462 states have internal predecessors, (54423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12463 states to 12463 states and 54423 transitions. [2021-08-21 12:45:19,980 INFO L78 Accepts]: Start accepts. Automaton has 12463 states and 54423 transitions. Word has length 32 [2021-08-21 12:45:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:19,980 INFO L470 AbstractCegarLoop]: Abstraction has 12463 states and 54423 transitions. [2021-08-21 12:45:19,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:19,980 INFO L276 IsEmpty]: Start isEmpty. Operand 12463 states and 54423 transitions. [2021-08-21 12:45:20,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:45:20,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:20,029 INFO L512 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, 1] [2021-08-21 12:45:20,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:20,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 12:45:20,245 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:20,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:20,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1529464653, now seen corresponding path program 8 times [2021-08-21 12:45:20,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:20,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668266991] [2021-08-21 12:45:20,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:20,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:20,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:20,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668266991] [2021-08-21 12:45:20,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668266991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:20,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170753126] [2021-08-21 12:45:20,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:45:20,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:20,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:20,313 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:20,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:45:20,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:45:20,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:20,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:45:20,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:20,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170753126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:20,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:20,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 12:45:20,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875436194] [2021-08-21 12:45:20,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:45:20,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:20,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:45:20,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:45:20,648 INFO L87 Difference]: Start difference. First operand 12463 states and 54423 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:21,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:21,942 INFO L93 Difference]: Finished difference Result 55315 states and 225744 transitions. [2021-08-21 12:45:21,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:45:21,943 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:45:21,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:22,425 INFO L225 Difference]: With dead ends: 55315 [2021-08-21 12:45:22,425 INFO L226 Difference]: Without dead ends: 54251 [2021-08-21 12:45:22,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 520.2ms TimeCoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:45:22,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54251 states. [2021-08-21 12:45:24,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54251 to 25038. [2021-08-21 12:45:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25038 states, 25037 states have (on average 4.435155969165635) internal successors, (111043), 25037 states have internal predecessors, (111043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 111043 transitions. [2021-08-21 12:45:24,180 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 111043 transitions. Word has length 32 [2021-08-21 12:45:24,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:24,180 INFO L470 AbstractCegarLoop]: Abstraction has 25038 states and 111043 transitions. [2021-08-21 12:45:24,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:24,180 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 111043 transitions. [2021-08-21 12:45:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:45:24,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:24,440 INFO L512 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, 1] [2021-08-21 12:45:24,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:24,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 12:45:24,653 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash -296790773, now seen corresponding path program 9 times [2021-08-21 12:45:24,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:24,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144005535] [2021-08-21 12:45:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:24,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:45:24,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:24,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144005535] [2021-08-21 12:45:24,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144005535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:24,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193776028] [2021-08-21 12:45:24,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:45:24,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:24,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:24,742 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:24,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:45:24,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:45:24,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:24,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:45:24,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:45:25,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193776028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:25,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:25,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 12:45:25,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874705652] [2021-08-21 12:45:25,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:45:25,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:25,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:45:25,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:45:25,112 INFO L87 Difference]: Start difference. First operand 25038 states and 111043 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:26,326 INFO L93 Difference]: Finished difference Result 64526 states and 272218 transitions. [2021-08-21 12:45:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:45:26,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:45:26,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:26,832 INFO L225 Difference]: With dead ends: 64526 [2021-08-21 12:45:26,832 INFO L226 Difference]: Without dead ends: 61671 [2021-08-21 12:45:26,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 405.9ms TimeCoverageRelationStatistics Valid=452, Invalid=1618, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 12:45:26,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61671 states. [2021-08-21 12:45:28,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61671 to 37901. [2021-08-21 12:45:28,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37901 states, 37900 states have (on average 4.5351187335092344) internal successors, (171881), 37900 states have internal predecessors, (171881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:28,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37901 states to 37901 states and 171881 transitions. [2021-08-21 12:45:28,685 INFO L78 Accepts]: Start accepts. Automaton has 37901 states and 171881 transitions. Word has length 34 [2021-08-21 12:45:28,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:28,685 INFO L470 AbstractCegarLoop]: Abstraction has 37901 states and 171881 transitions. [2021-08-21 12:45:28,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:28,685 INFO L276 IsEmpty]: Start isEmpty. Operand 37901 states and 171881 transitions. [2021-08-21 12:45:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:45:28,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:28,823 INFO L512 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, 1] [2021-08-21 12:45:28,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:29,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:29,024 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:29,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:29,024 INFO L82 PathProgramCache]: Analyzing trace with hash -824551801, now seen corresponding path program 10 times [2021-08-21 12:45:29,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:29,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292504543] [2021-08-21 12:45:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:29,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:45:29,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:29,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292504543] [2021-08-21 12:45:29,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292504543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:29,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98320132] [2021-08-21 12:45:29,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:45:29,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:29,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:29,088 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:29,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:45:29,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:45:29,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:29,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:45:29,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:45:29,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98320132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:29,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:29,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 12:45:29,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640187216] [2021-08-21 12:45:29,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:45:29,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:29,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:45:29,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:45:29,743 INFO L87 Difference]: Start difference. First operand 37901 states and 171881 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:30,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:30,985 INFO L93 Difference]: Finished difference Result 73902 states and 311786 transitions. [2021-08-21 12:45:30,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:45:30,985 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:45:30,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:31,597 INFO L225 Difference]: With dead ends: 73902 [2021-08-21 12:45:31,597 INFO L226 Difference]: Without dead ends: 72397 [2021-08-21 12:45:31,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 369.1ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:45:31,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72397 states. [2021-08-21 12:45:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72397 to 44705. [2021-08-21 12:45:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44705 states, 44704 states have (on average 4.498792054402291) internal successors, (201114), 44704 states have internal predecessors, (201114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44705 states to 44705 states and 201114 transitions. [2021-08-21 12:45:33,866 INFO L78 Accepts]: Start accepts. Automaton has 44705 states and 201114 transitions. Word has length 34 [2021-08-21 12:45:33,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:33,867 INFO L470 AbstractCegarLoop]: Abstraction has 44705 states and 201114 transitions. [2021-08-21 12:45:33,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:33,867 INFO L276 IsEmpty]: Start isEmpty. Operand 44705 states and 201114 transitions. [2021-08-21 12:45:33,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:45:33,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:33,994 INFO L512 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, 1] [2021-08-21 12:45:34,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-21 12:45:34,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:34,195 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:34,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:34,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2101662471, now seen corresponding path program 11 times [2021-08-21 12:45:34,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:34,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300574113] [2021-08-21 12:45:34,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:34,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:45:34,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:34,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300574113] [2021-08-21 12:45:34,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300574113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:34,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47278797] [2021-08-21 12:45:34,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:45:34,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:34,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:34,289 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:34,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:45:34,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:45:34,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:34,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:45:34,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:45:34,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47278797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:34,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:34,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-21 12:45:34,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93568856] [2021-08-21 12:45:34,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:45:34,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:45:34,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:45:34,967 INFO L87 Difference]: Start difference. First operand 44705 states and 201114 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:35,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:35,974 INFO L93 Difference]: Finished difference Result 69803 states and 307743 transitions. [2021-08-21 12:45:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:45:35,974 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:45:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:36,341 INFO L225 Difference]: With dead ends: 69803 [2021-08-21 12:45:36,341 INFO L226 Difference]: Without dead ends: 67685 [2021-08-21 12:45:36,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 194.5ms TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:45:36,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67685 states. [2021-08-21 12:45:38,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67685 to 55906. [2021-08-21 12:45:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55906 states, 55905 states have (on average 4.5403810034880605) internal successors, (253830), 55905 states have internal predecessors, (253830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55906 states to 55906 states and 253830 transitions. [2021-08-21 12:45:38,890 INFO L78 Accepts]: Start accepts. Automaton has 55906 states and 253830 transitions. Word has length 36 [2021-08-21 12:45:38,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:38,890 INFO L470 AbstractCegarLoop]: Abstraction has 55906 states and 253830 transitions. [2021-08-21 12:45:38,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:38,890 INFO L276 IsEmpty]: Start isEmpty. Operand 55906 states and 253830 transitions. [2021-08-21 12:45:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:45:39,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:39,123 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-08-21 12:45:39,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-21 12:45:39,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:39,324 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:39,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1582117723, now seen corresponding path program 12 times [2021-08-21 12:45:39,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:39,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225896204] [2021-08-21 12:45:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:39,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:45:39,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:39,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225896204] [2021-08-21 12:45:39,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225896204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:39,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529668403] [2021-08-21 12:45:39,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:45:39,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:39,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:39,424 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:39,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 12:45:39,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:45:39,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:39,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:45:39,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:45:39,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529668403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:39,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:39,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-21 12:45:39,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672910800] [2021-08-21 12:45:39,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:45:39,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:39,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:45:39,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:45:39,864 INFO L87 Difference]: Start difference. First operand 55906 states and 253830 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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) [2021-08-21 12:45:40,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:40,782 INFO L93 Difference]: Finished difference Result 61458 states and 273139 transitions. [2021-08-21 12:45:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:45:40,783 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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 36 [2021-08-21 12:45:40,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:41,330 INFO L225 Difference]: With dead ends: 61458 [2021-08-21 12:45:41,330 INFO L226 Difference]: Without dead ends: 60880 [2021-08-21 12:45:41,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:45:41,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60880 states. [2021-08-21 12:45:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60880 to 54067. [2021-08-21 12:45:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54067 states, 54066 states have (on average 4.53155402656013) internal successors, (245003), 54066 states have internal predecessors, (245003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:43,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54067 states to 54067 states and 245003 transitions. [2021-08-21 12:45:43,276 INFO L78 Accepts]: Start accepts. Automaton has 54067 states and 245003 transitions. Word has length 36 [2021-08-21 12:45:43,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:43,277 INFO L470 AbstractCegarLoop]: Abstraction has 54067 states and 245003 transitions. [2021-08-21 12:45:43,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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) [2021-08-21 12:45:43,277 INFO L276 IsEmpty]: Start isEmpty. Operand 54067 states and 245003 transitions. [2021-08-21 12:45:43,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:45:43,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:43,893 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:43,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:44,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:44,093 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:44,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:44,094 INFO L82 PathProgramCache]: Analyzing trace with hash 69707247, now seen corresponding path program 13 times [2021-08-21 12:45:44,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:44,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120111339] [2021-08-21 12:45:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:44,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:44,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:44,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120111339] [2021-08-21 12:45:44,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120111339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:44,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495007992] [2021-08-21 12:45:44,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:45:44,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:44,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:44,217 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:44,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 12:45:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:44,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:45:44,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:44,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495007992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:44,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:44,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-08-21 12:45:44,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220123264] [2021-08-21 12:45:44,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:45:44,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:45:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:45:44,758 INFO L87 Difference]: Start difference. First operand 54067 states and 245003 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:46,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:46,467 INFO L93 Difference]: Finished difference Result 137834 states and 625848 transitions. [2021-08-21 12:45:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:45:46,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:45:46,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:47,676 INFO L225 Difference]: With dead ends: 137834 [2021-08-21 12:45:47,676 INFO L226 Difference]: Without dead ends: 135648 [2021-08-21 12:45:47,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:45:47,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135648 states. [2021-08-21 12:45:50,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135648 to 93732. [2021-08-21 12:45:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93732 states, 93731 states have (on average 4.620008321686528) internal successors, (433038), 93731 states have internal predecessors, (433038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:51,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93732 states to 93732 states and 433038 transitions. [2021-08-21 12:45:51,834 INFO L78 Accepts]: Start accepts. Automaton has 93732 states and 433038 transitions. Word has length 38 [2021-08-21 12:45:51,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:51,835 INFO L470 AbstractCegarLoop]: Abstraction has 93732 states and 433038 transitions. [2021-08-21 12:45:51,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:51,835 INFO L276 IsEmpty]: Start isEmpty. Operand 93732 states and 433038 transitions. [2021-08-21 12:45:52,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 12:45:52,552 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:52,552 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-08-21 12:45:52,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:52,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:52,753 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:45:52,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:52,753 INFO L82 PathProgramCache]: Analyzing trace with hash 7577325, now seen corresponding path program 14 times [2021-08-21 12:45:52,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:52,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366474119] [2021-08-21 12:45:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:52,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:45:52,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:52,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366474119] [2021-08-21 12:45:52,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366474119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:52,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123119366] [2021-08-21 12:45:52,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:45:52,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:52,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:52,833 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:52,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 12:45:53,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:45:53,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:53,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:45:53,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:45:53,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123119366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:53,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:53,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-08-21 12:45:53,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904291066] [2021-08-21 12:45:53,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:45:53,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:53,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:45:53,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:45:53,343 INFO L87 Difference]: Start difference. First operand 93732 states and 433038 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:58,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:58,848 INFO L93 Difference]: Finished difference Result 351293 states and 1533111 transitions. [2021-08-21 12:45:58,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 12:45:58,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 12:45:58,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:04,737 INFO L225 Difference]: With dead ends: 351293 [2021-08-21 12:46:04,737 INFO L226 Difference]: Without dead ends: 347505 [2021-08-21 12:46:04,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 870.3ms TimeCoverageRelationStatistics Valid=995, Invalid=3165, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 12:46:05,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347505 states. [2021-08-21 12:46:14,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347505 to 165853. [2021-08-21 12:46:14,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165853 states, 165852 states have (on average 4.619045896341317) internal successors, (766078), 165852 states have internal predecessors, (766078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:16,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165853 states to 165853 states and 766078 transitions. [2021-08-21 12:46:16,866 INFO L78 Accepts]: Start accepts. Automaton has 165853 states and 766078 transitions. Word has length 40 [2021-08-21 12:46:16,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:16,866 INFO L470 AbstractCegarLoop]: Abstraction has 165853 states and 766078 transitions. [2021-08-21 12:46:16,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:16,867 INFO L276 IsEmpty]: Start isEmpty. Operand 165853 states and 766078 transitions. [2021-08-21 12:46:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 12:46:17,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:17,824 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-08-21 12:46:17,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:18,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:18,025 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:46:18,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:18,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1204202959, now seen corresponding path program 15 times [2021-08-21 12:46:18,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:18,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995244100] [2021-08-21 12:46:18,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:18,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:46:18,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:18,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995244100] [2021-08-21 12:46:18,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995244100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:18,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073986487] [2021-08-21 12:46:18,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:46:18,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:18,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:18,095 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:18,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 12:46:18,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:46:18,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:18,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:46:18,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:46:18,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073986487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:18,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:18,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 12:46:18,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29991113] [2021-08-21 12:46:18,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:46:18,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:18,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:46:18,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:46:18,627 INFO L87 Difference]: Start difference. First operand 165853 states and 766078 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:29,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:29,511 INFO L93 Difference]: Finished difference Result 676404 states and 3014748 transitions. [2021-08-21 12:46:29,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-21 12:46:29,512 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 12:46:29,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:37,365 INFO L225 Difference]: With dead ends: 676404 [2021-08-21 12:46:37,365 INFO L226 Difference]: Without dead ends: 653311 [2021-08-21 12:46:37,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 887.5ms TimeCoverageRelationStatistics Valid=1278, Invalid=4574, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 12:46:38,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653311 states. [2021-08-21 12:47:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653311 to 443098. [2021-08-21 12:47:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443098 states, 443097 states have (on average 4.663667323407742) internal successors, (2066457), 443097 states have internal predecessors, (2066457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443098 states to 443098 states and 2066457 transitions. [2021-08-21 12:47:18,005 INFO L78 Accepts]: Start accepts. Automaton has 443098 states and 2066457 transitions. Word has length 40 [2021-08-21 12:47:18,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:18,005 INFO L470 AbstractCegarLoop]: Abstraction has 443098 states and 2066457 transitions. [2021-08-21 12:47:18,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 443098 states and 2066457 transitions. [2021-08-21 12:47:22,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 12:47:22,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:22,589 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-08-21 12:47:22,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:22,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 12:47:22,813 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:47:22,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:22,813 INFO L82 PathProgramCache]: Analyzing trace with hash 689651233, now seen corresponding path program 16 times [2021-08-21 12:47:22,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:22,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118890879] [2021-08-21 12:47:22,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:22,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:47:22,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:22,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118890879] [2021-08-21 12:47:22,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118890879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:22,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718837080] [2021-08-21 12:47:22,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:47:22,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:22,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:22,926 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:22,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 12:47:23,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:47:23,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:23,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:47:23,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:47:23,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718837080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:23,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:23,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-08-21 12:47:23,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564012893] [2021-08-21 12:47:23,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:47:23,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:23,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:47:23,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:47:23,505 INFO L87 Difference]: Start difference. First operand 443098 states and 2066457 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)