/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:03:28,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:03:28,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:03:28,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 20:03:28,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 20:03:28,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 20:03:28,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 20:03:28,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 20:03:28,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 20:03:28,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 20:03:28,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 20:03:28,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 20:03:28,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 20:03:28,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 20:03:28,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 20:03:28,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 20:03:28,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 20:03:28,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 20:03:28,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 20:03:28,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 20:03:28,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 20:03:28,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 20:03:28,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 20:03:28,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 20:03:28,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-06 20:03:28,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 20:03:28,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 20:03:28,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 20:03:28,357 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-Delay.epf [2021-08-06 20:03:28,386 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:03:28,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:03:28,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:03:28,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:03:28,391 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:03:28,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:03:28,391 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:03:28,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:03:28,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:03:28,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:03:28,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:03:28,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:03:28,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:03:28,393 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:03:28,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:03:28,393 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:03:28,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:03:28,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:03:28,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:03:28,394 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:03:28,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:03:28,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:03:28,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:03:28,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:03:28,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:03:28,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:03:28,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:03:28,395 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:03:28,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:03:28,395 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:03:28,395 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:03:28,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:03:28,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:03:28,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:03:28,735 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:03:28,736 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:03:28,737 INFO L432 ainManager$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 [2021-08-06 20:03:28,748 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl' [2021-08-06 20:03:28,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:03:28,781 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:03:28,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:03:28,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:03:28,782 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:03:28,793 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 06.08 08:03:28" (1/1) ... [2021-08-06 20:03:28,799 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 06.08 08:03:28" (1/1) ... [2021-08-06 20:03:28,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:03:28,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:03:28,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:03:28,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:03:28,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:28" (1/1) ... [2021-08-06 20:03:28,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:28" (1/1) ... [2021-08-06 20:03:28,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:28" (1/1) ... [2021-08-06 20:03:28,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:28" (1/1) ... [2021-08-06 20:03:28,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:28" (1/1) ... [2021-08-06 20:03:28,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:28" (1/1) ... [2021-08-06 20:03:28,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:28" (1/1) ... [2021-08-06 20:03:28,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:03:28,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:03:28,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:03:28,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:03:28,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:28" (1/1) ... [2021-08-06 20:03:28,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:03:28,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:28,851 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) [2021-08-06 20:03:28,869 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 [2021-08-06 20:03:28,882 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:03:28,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:03:28,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:03:28,883 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:03:28,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:03:28,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:03:28,883 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:03:28,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:03:28,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:03:28,883 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 20:03:28,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 20:03:28,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 20:03:28,884 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-06 20:03:28,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-06 20:03:28,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-06 20:03:28,885 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 20:03:29,103 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:03:29,103 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 20:03:29,105 INFO L202 PluginConnector]: Adding new model mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:03:29 BoogieIcfgContainer [2021-08-06 20:03:29,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:03:29,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:03:29,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:03:29,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:03:29,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:03:28" (1/2) ... [2021-08-06 20:03:29,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74862210 and model type mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:03:29, skipping insertion in model container [2021-08-06 20:03:29,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:03:29" (2/2) ... [2021-08-06 20:03:29,111 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-4.wvr.bpl [2021-08-06 20:03:29,139 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:03:29,140 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:03:29,140 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:03:29,140 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:03:29,213 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-06 20:03:29,247 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:03:29,253 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 [2021-08-06 20:03:29,253 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-06 20:03:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 432 states, 299 states have (on average 2.1672240802675584) internal successors, (648), 431 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:29,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:03:29,518 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:29,519 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] [2021-08-06 20:03:29,519 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:29,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1941534175, now seen corresponding path program 1 times [2021-08-06 20:03:29,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:29,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131448595] [2021-08-06 20:03:29,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:29,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:29,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:29,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131448595] [2021-08-06 20:03:29,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131448595] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:03:29,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:03:29,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:03:29,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213513638] [2021-08-06 20:03:29,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:03:29,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:29,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:03:29,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:03:29,742 INFO L87 Difference]: Start difference. First operand has 432 states, 299 states have (on average 2.1672240802675584) internal successors, (648), 431 states have internal predecessors, (648), 0 states have call successors, (0), 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) [2021-08-06 20:03:29,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:29,799 INFO L93 Difference]: Finished difference Result 841 states and 1177 transitions. [2021-08-06 20:03:29,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:03:29,801 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 [2021-08-06 20:03:29,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:29,815 INFO L225 Difference]: With dead ends: 841 [2021-08-06 20:03:29,815 INFO L226 Difference]: Without dead ends: 212 [2021-08-06 20:03:29,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:03:29,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-06 20:03:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 207. [2021-08-06 20:03:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.3689320388349513) internal successors, (488), 206 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 488 transitions. [2021-08-06 20:03:29,880 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 488 transitions. Word has length 22 [2021-08-06 20:03:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:29,880 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 488 transitions. [2021-08-06 20:03:29,881 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) [2021-08-06 20:03:29,881 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 488 transitions. [2021-08-06 20:03:29,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:03:29,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:29,888 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] [2021-08-06 20:03:29,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:03:29,889 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:29,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:29,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2114961633, now seen corresponding path program 1 times [2021-08-06 20:03:29,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:29,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172865569] [2021-08-06 20:03:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:29,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:30,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:30,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172865569] [2021-08-06 20:03:30,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172865569] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:03:30,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:03:30,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 20:03:30,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742412983] [2021-08-06 20:03:30,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:03:30,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:30,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:03:30,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:03:30,048 INFO L87 Difference]: Start difference. First operand 207 states and 488 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) [2021-08-06 20:03:30,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:30,102 INFO L93 Difference]: Finished difference Result 352 states and 801 transitions. [2021-08-06 20:03:30,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:03:30,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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 [2021-08-06 20:03:30,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:30,106 INFO L225 Difference]: With dead ends: 352 [2021-08-06 20:03:30,106 INFO L226 Difference]: Without dead ends: 352 [2021-08-06 20:03:30,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:03:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-08-06 20:03:30,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 239. [2021-08-06 20:03:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.3529411764705883) internal successors, (560), 238 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:30,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 560 transitions. [2021-08-06 20:03:30,145 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 560 transitions. Word has length 24 [2021-08-06 20:03:30,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:30,145 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 560 transitions. [2021-08-06 20:03:30,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) [2021-08-06 20:03:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 560 transitions. [2021-08-06 20:03:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:03:30,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:30,147 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] [2021-08-06 20:03:30,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 20:03:30,147 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:30,148 INFO L82 PathProgramCache]: Analyzing trace with hash 869807647, now seen corresponding path program 1 times [2021-08-06 20:03:30,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:30,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666837042] [2021-08-06 20:03:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:30,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:30,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:30,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666837042] [2021-08-06 20:03:30,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666837042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:30,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645107210] [2021-08-06 20:03:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:30,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:30,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:30,266 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) [2021-08-06 20:03:30,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 20:03:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:30,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 20:03:30,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:30,516 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:30,517 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:30,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645107210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:30,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:30,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-08-06 20:03:30,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223240214] [2021-08-06 20:03:30,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:03:30,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:30,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:03:30,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:03:30,566 INFO L87 Difference]: Start difference. First operand 239 states and 560 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:30,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:30,623 INFO L93 Difference]: Finished difference Result 388 states and 889 transitions. [2021-08-06 20:03:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 20:03:30,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-08-06 20:03:30,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:30,626 INFO L225 Difference]: With dead ends: 388 [2021-08-06 20:03:30,626 INFO L226 Difference]: Without dead ends: 388 [2021-08-06 20:03:30,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:03:30,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-08-06 20:03:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 275. [2021-08-06 20:03:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.3613138686131387) internal successors, (647), 274 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:30,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 647 transitions. [2021-08-06 20:03:30,638 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 647 transitions. Word has length 24 [2021-08-06 20:03:30,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:30,639 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 647 transitions. [2021-08-06 20:03:30,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:30,639 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 647 transitions. [2021-08-06 20:03:30,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:03:30,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:30,640 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] [2021-08-06 20:03:30,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:30,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:30,865 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:30,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:30,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2104881629, now seen corresponding path program 2 times [2021-08-06 20:03:30,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:30,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784803515] [2021-08-06 20:03:30,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:30,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:30,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:30,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784803515] [2021-08-06 20:03:30,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784803515] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:03:30,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:03:30,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:03:30,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084175041] [2021-08-06 20:03:30,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:03:30,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:30,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:03:30,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:03:30,928 INFO L87 Difference]: Start difference. First operand 275 states and 647 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) [2021-08-06 20:03:30,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:30,968 INFO L93 Difference]: Finished difference Result 264 states and 601 transitions. [2021-08-06 20:03:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:03:30,968 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 [2021-08-06 20:03:30,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:30,970 INFO L225 Difference]: With dead ends: 264 [2021-08-06 20:03:30,970 INFO L226 Difference]: Without dead ends: 249 [2021-08-06 20:03:30,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:03:30,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-08-06 20:03:30,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 244. [2021-08-06 20:03:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.3580246913580245) internal successors, (573), 243 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 573 transitions. [2021-08-06 20:03:30,982 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 573 transitions. Word has length 24 [2021-08-06 20:03:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:30,982 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 573 transitions. [2021-08-06 20:03:30,982 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) [2021-08-06 20:03:30,982 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 573 transitions. [2021-08-06 20:03:30,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:03:30,985 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:30,985 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] [2021-08-06 20:03:30,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 20:03:30,985 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:30,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:30,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1709745053, now seen corresponding path program 1 times [2021-08-06 20:03:30,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:30,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612339630] [2021-08-06 20:03:30,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:30,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:31,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:31,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612339630] [2021-08-06 20:03:31,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612339630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:31,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774632224] [2021-08-06 20:03:31,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:31,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:31,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:31,175 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) [2021-08-06 20:03:31,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 20:03:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:31,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 20:03:31,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:31,360 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:31,361 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:31,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774632224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:31,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:31,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-08-06 20:03:31,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725105380] [2021-08-06 20:03:31,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:03:31,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:31,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:03:31,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:03:31,398 INFO L87 Difference]: Start difference. First operand 244 states and 573 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:31,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:31,469 INFO L93 Difference]: Finished difference Result 495 states and 1143 transitions. [2021-08-06 20:03:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 20:03:31,470 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-08-06 20:03:31,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:31,472 INFO L225 Difference]: With dead ends: 495 [2021-08-06 20:03:31,472 INFO L226 Difference]: Without dead ends: 495 [2021-08-06 20:03:31,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:03:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-08-06 20:03:31,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 300. [2021-08-06 20:03:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.391304347826087) internal successors, (715), 299 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 715 transitions. [2021-08-06 20:03:31,481 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 715 transitions. Word has length 26 [2021-08-06 20:03:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:31,482 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 715 transitions. [2021-08-06 20:03:31,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 715 transitions. [2021-08-06 20:03:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:03:31,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:31,483 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] [2021-08-06 20:03:31,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:31,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:31,705 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:31,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:31,706 INFO L82 PathProgramCache]: Analyzing trace with hash 235205465, now seen corresponding path program 2 times [2021-08-06 20:03:31,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:31,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105606507] [2021-08-06 20:03:31,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:31,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:31,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:31,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105606507] [2021-08-06 20:03:31,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105606507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:31,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193988663] [2021-08-06 20:03:31,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:03:31,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:31,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:31,787 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) [2021-08-06 20:03:31,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 20:03:31,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:03:31,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:31,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:03:31,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:32,003 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:32,004 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:32,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193988663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:32,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:32,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-08-06 20:03:32,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982692982] [2021-08-06 20:03:32,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:03:32,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:32,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:03:32,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:03:32,064 INFO L87 Difference]: Start difference. First operand 300 states and 715 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-08-06 20:03:32,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:32,125 INFO L93 Difference]: Finished difference Result 496 states and 1137 transitions. [2021-08-06 20:03:32,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 20:03:32,126 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 26 [2021-08-06 20:03:32,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:32,128 INFO L225 Difference]: With dead ends: 496 [2021-08-06 20:03:32,129 INFO L226 Difference]: Without dead ends: 496 [2021-08-06 20:03:32,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:03:32,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-08-06 20:03:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 300. [2021-08-06 20:03:32,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.3745819397993313) internal successors, (710), 299 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:32,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 710 transitions. [2021-08-06 20:03:32,140 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 710 transitions. Word has length 26 [2021-08-06 20:03:32,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:32,141 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 710 transitions. [2021-08-06 20:03:32,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-08-06 20:03:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 710 transitions. [2021-08-06 20:03:32,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:03:32,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:32,143 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] [2021-08-06 20:03:32,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:32,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:32,357 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:32,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:32,357 INFO L82 PathProgramCache]: Analyzing trace with hash 54592533, now seen corresponding path program 3 times [2021-08-06 20:03:32,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:32,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942497991] [2021-08-06 20:03:32,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:32,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:32,408 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:32,409 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:32,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:32,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942497991] [2021-08-06 20:03:32,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942497991] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:03:32,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:03:32,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:03:32,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581367468] [2021-08-06 20:03:32,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:03:32,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:32,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:03:32,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:03:32,416 INFO L87 Difference]: Start difference. First operand 300 states and 710 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:32,451 INFO L93 Difference]: Finished difference Result 342 states and 789 transitions. [2021-08-06 20:03:32,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:03:32,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2021-08-06 20:03:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:32,454 INFO L225 Difference]: With dead ends: 342 [2021-08-06 20:03:32,454 INFO L226 Difference]: Without dead ends: 328 [2021-08-06 20:03:32,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:03:32,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-08-06 20:03:32,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 294. [2021-08-06 20:03:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.372013651877133) internal successors, (695), 293 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 695 transitions. [2021-08-06 20:03:32,467 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 695 transitions. Word has length 26 [2021-08-06 20:03:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:32,469 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 695 transitions. [2021-08-06 20:03:32,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 695 transitions. [2021-08-06 20:03:32,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:03:32,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:32,471 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] [2021-08-06 20:03:32,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 20:03:32,471 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:32,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:32,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1567975393, now seen corresponding path program 1 times [2021-08-06 20:03:32,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:32,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790574192] [2021-08-06 20:03:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:32,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:32,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:32,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790574192] [2021-08-06 20:03:32,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790574192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:32,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214776075] [2021-08-06 20:03:32,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:32,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:32,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:32,564 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) [2021-08-06 20:03:32,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 20:03:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:32,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 20:03:32,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:32,814 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:32,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:03:32,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214776075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:32,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:32,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-08-06 20:03:32,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938978981] [2021-08-06 20:03:32,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:03:32,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:32,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:03:32,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:03:32,846 INFO L87 Difference]: Start difference. First operand 294 states and 695 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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) [2021-08-06 20:03:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:32,902 INFO L93 Difference]: Finished difference Result 575 states and 1384 transitions. [2021-08-06 20:03:32,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 20:03:32,906 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 [2021-08-06 20:03:32,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:32,909 INFO L225 Difference]: With dead ends: 575 [2021-08-06 20:03:32,909 INFO L226 Difference]: Without dead ends: 575 [2021-08-06 20:03:32,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:03:32,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-08-06 20:03:32,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 411. [2021-08-06 20:03:32,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.819512195121951) internal successors, (1156), 410 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1156 transitions. [2021-08-06 20:03:32,920 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1156 transitions. Word has length 28 [2021-08-06 20:03:32,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:32,921 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1156 transitions. [2021-08-06 20:03:32,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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) [2021-08-06 20:03:32,921 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1156 transitions. [2021-08-06 20:03:32,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:03:32,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:32,922 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] [2021-08-06 20:03:32,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:33,141 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 [2021-08-06 20:03:33,142 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:33,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:33,142 INFO L82 PathProgramCache]: Analyzing trace with hash -594782687, now seen corresponding path program 1 times [2021-08-06 20:03:33,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:33,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385752628] [2021-08-06 20:03:33,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:33,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:33,214 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:03:33,216 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:03:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:33,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:33,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385752628] [2021-08-06 20:03:33,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385752628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:33,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416515268] [2021-08-06 20:03:33,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:33,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:33,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:33,233 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) [2021-08-06 20:03:33,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 20:03:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:33,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 20:03:33,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:33,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416515268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:33,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:33,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-06 20:03:33,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730469137] [2021-08-06 20:03:33,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:03:33,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:33,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:03:33,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:03:33,724 INFO L87 Difference]: Start difference. First operand 411 states and 1156 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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) [2021-08-06 20:03:33,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:33,791 INFO L93 Difference]: Finished difference Result 1330 states and 3537 transitions. [2021-08-06 20:03:33,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 20:03:33,792 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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 [2021-08-06 20:03:33,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:33,797 INFO L225 Difference]: With dead ends: 1330 [2021-08-06 20:03:33,797 INFO L226 Difference]: Without dead ends: 1105 [2021-08-06 20:03:33,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:03:33,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-08-06 20:03:33,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 838. [2021-08-06 20:03:33,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 2.859020310633214) internal successors, (2393), 837 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:33,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2393 transitions. [2021-08-06 20:03:33,823 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2393 transitions. Word has length 30 [2021-08-06 20:03:33,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:33,824 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 2393 transitions. [2021-08-06 20:03:33,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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) [2021-08-06 20:03:33,824 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2393 transitions. [2021-08-06 20:03:33,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:03:33,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:33,826 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] [2021-08-06 20:03:33,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:34,050 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 [2021-08-06 20:03:34,051 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:34,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1480957923, now seen corresponding path program 2 times [2021-08-06 20:03:34,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:34,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843572992] [2021-08-06 20:03:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:34,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:34,116 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:03:34,117 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:03:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:34,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:34,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843572992] [2021-08-06 20:03:34,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843572992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:34,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446633425] [2021-08-06 20:03:34,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:03:34,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:34,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:34,132 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) [2021-08-06 20:03:34,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 20:03:34,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:03:34,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:34,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 20:03:34,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:03:34,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446633425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:34,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:34,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-06 20:03:34,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279150269] [2021-08-06 20:03:34,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:03:34,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:34,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:03:34,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:03:34,591 INFO L87 Difference]: Start difference. First operand 838 states and 2393 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) [2021-08-06 20:03:34,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:34,704 INFO L93 Difference]: Finished difference Result 2328 states and 6363 transitions. [2021-08-06 20:03:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:03:34,705 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 [2021-08-06 20:03:34,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:34,716 INFO L225 Difference]: With dead ends: 2328 [2021-08-06 20:03:34,716 INFO L226 Difference]: Without dead ends: 2087 [2021-08-06 20:03:34,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:03:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-08-06 20:03:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1189. [2021-08-06 20:03:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.8745791245791246) internal successors, (3415), 1188 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3415 transitions. [2021-08-06 20:03:34,753 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3415 transitions. Word has length 30 [2021-08-06 20:03:34,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:34,753 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 3415 transitions. [2021-08-06 20:03:34,753 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) [2021-08-06 20:03:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3415 transitions. [2021-08-06 20:03:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:03:34,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:34,757 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] [2021-08-06 20:03:34,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:34,980 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 [2021-08-06 20:03:34,981 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:34,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:34,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1395141919, now seen corresponding path program 3 times [2021-08-06 20:03:34,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:34,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825998618] [2021-08-06 20:03:34,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:34,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:35,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:35,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825998618] [2021-08-06 20:03:35,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825998618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:35,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311541792] [2021-08-06 20:03:35,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:03:35,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:35,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:35,058 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) [2021-08-06 20:03:35,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 20:03:35,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:03:35,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:35,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:03:35,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:35,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311541792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:35,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:35,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 20:03:35,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895836730] [2021-08-06 20:03:35,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:03:35,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:35,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:03:35,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:03:35,470 INFO L87 Difference]: Start difference. First operand 1189 states and 3415 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:36,011 INFO L93 Difference]: Finished difference Result 5909 states and 15931 transitions. [2021-08-06 20:03:36,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:03:36,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 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 [2021-08-06 20:03:36,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:36,077 INFO L225 Difference]: With dead ends: 5909 [2021-08-06 20:03:36,077 INFO L226 Difference]: Without dead ends: 5821 [2021-08-06 20:03:36,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 368.0ms TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:03:36,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5821 states. [2021-08-06 20:03:36,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5821 to 2613. [2021-08-06 20:03:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 2612 states have (on average 2.8621745788667687) internal successors, (7476), 2612 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 7476 transitions. [2021-08-06 20:03:36,179 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 7476 transitions. Word has length 32 [2021-08-06 20:03:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:36,179 INFO L470 AbstractCegarLoop]: Abstraction has 2613 states and 7476 transitions. [2021-08-06 20:03:36,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:36,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 7476 transitions. [2021-08-06 20:03:36,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:03:36,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:36,189 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] [2021-08-06 20:03:36,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:36,404 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 [2021-08-06 20:03:36,405 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:36,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:36,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1784369951, now seen corresponding path program 4 times [2021-08-06 20:03:36,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:36,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997752475] [2021-08-06 20:03:36,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:36,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:36,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:36,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997752475] [2021-08-06 20:03:36,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997752475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:36,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211417932] [2021-08-06 20:03:36,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:03:36,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:36,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:36,485 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) [2021-08-06 20:03:36,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 20:03:36,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:03:36,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:36,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:03:36,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:36,858 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:36,858 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:36,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211417932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:36,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:36,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-08-06 20:03:36,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156673502] [2021-08-06 20:03:36,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:03:36,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:36,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:03:36,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:03:36,905 INFO L87 Difference]: Start difference. First operand 2613 states and 7476 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:37,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:37,014 INFO L93 Difference]: Finished difference Result 6203 states and 17363 transitions. [2021-08-06 20:03:37,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:03:37,015 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 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 [2021-08-06 20:03:37,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:37,048 INFO L225 Difference]: With dead ends: 6203 [2021-08-06 20:03:37,049 INFO L226 Difference]: Without dead ends: 6203 [2021-08-06 20:03:37,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:03:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6203 states. [2021-08-06 20:03:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6203 to 3684. [2021-08-06 20:03:37,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3684 states, 3683 states have (on average 2.9584577789845237) internal successors, (10896), 3683 states have internal predecessors, (10896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3684 states to 3684 states and 10896 transitions. [2021-08-06 20:03:37,174 INFO L78 Accepts]: Start accepts. Automaton has 3684 states and 10896 transitions. Word has length 32 [2021-08-06 20:03:37,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:37,174 INFO L470 AbstractCegarLoop]: Abstraction has 3684 states and 10896 transitions. [2021-08-06 20:03:37,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:37,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3684 states and 10896 transitions. [2021-08-06 20:03:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:03:37,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:37,184 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] [2021-08-06 20:03:37,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:37,400 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 [2021-08-06 20:03:37,401 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:37,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:37,401 INFO L82 PathProgramCache]: Analyzing trace with hash -251226149, now seen corresponding path program 5 times [2021-08-06 20:03:37,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:37,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781503981] [2021-08-06 20:03:37,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:37,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:37,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:37,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781503981] [2021-08-06 20:03:37,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781503981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:37,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160692756] [2021-08-06 20:03:37,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:03:37,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:37,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:37,467 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) [2021-08-06 20:03:37,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 20:03:37,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:03:37,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:37,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:03:37,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:37,884 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:03:37,885 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:03:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:37,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160692756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:37,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:37,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-08-06 20:03:37,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619651604] [2021-08-06 20:03:37,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:03:37,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:37,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:03:37,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:03:37,942 INFO L87 Difference]: Start difference. First operand 3684 states and 10896 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:38,033 INFO L93 Difference]: Finished difference Result 5612 states and 15690 transitions. [2021-08-06 20:03:38,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:03:38,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 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 [2021-08-06 20:03:38,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:38,053 INFO L225 Difference]: With dead ends: 5612 [2021-08-06 20:03:38,053 INFO L226 Difference]: Without dead ends: 5531 [2021-08-06 20:03:38,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:03:38,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5531 states. [2021-08-06 20:03:38,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5531 to 3674. [2021-08-06 20:03:38,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3673 states have (on average 2.9365641165260006) internal successors, (10786), 3673 states have internal predecessors, (10786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 10786 transitions. [2021-08-06 20:03:38,165 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 10786 transitions. Word has length 32 [2021-08-06 20:03:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:38,166 INFO L470 AbstractCegarLoop]: Abstraction has 3674 states and 10786 transitions. [2021-08-06 20:03:38,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 10786 transitions. [2021-08-06 20:03:38,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:03:38,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:38,189 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] [2021-08-06 20:03:38,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:38,389 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 [2021-08-06 20:03:38,390 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:38,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:38,390 INFO L82 PathProgramCache]: Analyzing trace with hash -781323479, now seen corresponding path program 6 times [2021-08-06 20:03:38,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:38,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78105172] [2021-08-06 20:03:38,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:38,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:38,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:38,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78105172] [2021-08-06 20:03:38,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78105172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:38,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545741489] [2021-08-06 20:03:38,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:03:38,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:38,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:38,469 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) [2021-08-06 20:03:38,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 20:03:38,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 20:03:38,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:38,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:03:38,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:38,809 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:03:38,810 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:03:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:38,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545741489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:38,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:38,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-06 20:03:38,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512181085] [2021-08-06 20:03:38,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:03:38,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:38,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:03:38,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:03:38,876 INFO L87 Difference]: Start difference. First operand 3674 states and 10786 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) [2021-08-06 20:03:39,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:39,002 INFO L93 Difference]: Finished difference Result 5291 states and 14768 transitions. [2021-08-06 20:03:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:03:39,003 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 [2021-08-06 20:03:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:39,020 INFO L225 Difference]: With dead ends: 5291 [2021-08-06 20:03:39,020 INFO L226 Difference]: Without dead ends: 5114 [2021-08-06 20:03:39,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:03:39,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5114 states. [2021-08-06 20:03:39,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5114 to 3937. [2021-08-06 20:03:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3937 states, 3936 states have (on average 2.8940548780487805) internal successors, (11391), 3936 states have internal predecessors, (11391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3937 states to 3937 states and 11391 transitions. [2021-08-06 20:03:39,138 INFO L78 Accepts]: Start accepts. Automaton has 3937 states and 11391 transitions. Word has length 32 [2021-08-06 20:03:39,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:39,138 INFO L470 AbstractCegarLoop]: Abstraction has 3937 states and 11391 transitions. [2021-08-06 20:03:39,139 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) [2021-08-06 20:03:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3937 states and 11391 transitions. [2021-08-06 20:03:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:03:39,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:39,149 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] [2021-08-06 20:03:39,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:39,364 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 [2021-08-06 20:03:39,365 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:39,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:39,365 INFO L82 PathProgramCache]: Analyzing trace with hash -363624933, now seen corresponding path program 7 times [2021-08-06 20:03:39,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:39,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103171630] [2021-08-06 20:03:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:39,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:39,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:39,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103171630] [2021-08-06 20:03:39,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103171630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:39,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574550489] [2021-08-06 20:03:39,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:03:39,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:39,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:39,451 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) [2021-08-06 20:03:39,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 20:03:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:39,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:03:39,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:39,873 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:39,874 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:39,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574550489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:39,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:39,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-08-06 20:03:39,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513459510] [2021-08-06 20:03:39,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:03:39,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:39,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:03:39,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:03:39,927 INFO L87 Difference]: Start difference. First operand 3937 states and 11391 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:40,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:40,149 INFO L93 Difference]: Finished difference Result 8969 states and 25083 transitions. [2021-08-06 20:03:40,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:03:40,150 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 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 [2021-08-06 20:03:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:40,181 INFO L225 Difference]: With dead ends: 8969 [2021-08-06 20:03:40,181 INFO L226 Difference]: Without dead ends: 8969 [2021-08-06 20:03:40,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:03:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8969 states. [2021-08-06 20:03:40,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8969 to 5139. [2021-08-06 20:03:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5139 states, 5138 states have (on average 2.9229272090307514) internal successors, (15018), 5138 states have internal predecessors, (15018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:40,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5139 states to 5139 states and 15018 transitions. [2021-08-06 20:03:40,360 INFO L78 Accepts]: Start accepts. Automaton has 5139 states and 15018 transitions. Word has length 32 [2021-08-06 20:03:40,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:40,360 INFO L470 AbstractCegarLoop]: Abstraction has 5139 states and 15018 transitions. [2021-08-06 20:03:40,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:40,361 INFO L276 IsEmpty]: Start isEmpty. Operand 5139 states and 15018 transitions. [2021-08-06 20:03:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:03:40,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:40,374 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] [2021-08-06 20:03:40,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:40,598 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 [2021-08-06 20:03:40,598 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:40,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:40,599 INFO L82 PathProgramCache]: Analyzing trace with hash 86010583, now seen corresponding path program 8 times [2021-08-06 20:03:40,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:40,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069486675] [2021-08-06 20:03:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:40,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:40,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:40,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069486675] [2021-08-06 20:03:40,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069486675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:40,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796432486] [2021-08-06 20:03:40,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:03:40,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:40,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:40,658 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) [2021-08-06 20:03:40,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 20:03:40,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:03:40,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:40,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:03:40,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:41,093 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:03:41,094 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:03:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:41,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796432486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:41,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:41,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-08-06 20:03:41,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479451999] [2021-08-06 20:03:41,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:03:41,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:41,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:03:41,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:03:41,153 INFO L87 Difference]: Start difference. First operand 5139 states and 15018 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:41,261 INFO L93 Difference]: Finished difference Result 6167 states and 17540 transitions. [2021-08-06 20:03:41,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:03:41,262 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 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 [2021-08-06 20:03:41,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:41,281 INFO L225 Difference]: With dead ends: 6167 [2021-08-06 20:03:41,281 INFO L226 Difference]: Without dead ends: 6128 [2021-08-06 20:03:41,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:03:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2021-08-06 20:03:41,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 5056. [2021-08-06 20:03:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5056 states, 5055 states have (on average 2.919683481701286) internal successors, (14759), 5055 states have internal predecessors, (14759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:41,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5056 states to 5056 states and 14759 transitions. [2021-08-06 20:03:41,404 INFO L78 Accepts]: Start accepts. Automaton has 5056 states and 14759 transitions. Word has length 32 [2021-08-06 20:03:41,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:41,404 INFO L470 AbstractCegarLoop]: Abstraction has 5056 states and 14759 transitions. [2021-08-06 20:03:41,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:41,404 INFO L276 IsEmpty]: Start isEmpty. Operand 5056 states and 14759 transitions. [2021-08-06 20:03:41,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:03:41,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:41,418 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] [2021-08-06 20:03:41,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:41,632 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 [2021-08-06 20:03:41,633 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:41,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:41,633 INFO L82 PathProgramCache]: Analyzing trace with hash -307589337, now seen corresponding path program 9 times [2021-08-06 20:03:41,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:41,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422640719] [2021-08-06 20:03:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:41,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:41,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:41,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422640719] [2021-08-06 20:03:41,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422640719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:41,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246922576] [2021-08-06 20:03:41,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:03:41,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:41,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:41,749 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) [2021-08-06 20:03:41,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 20:03:41,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:03:41,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:41,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:03:41,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:42,133 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:03:42,133 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:03:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:42,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246922576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:42,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:42,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-06 20:03:42,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791519543] [2021-08-06 20:03:42,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:03:42,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:42,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:03:42,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:03:42,193 INFO L87 Difference]: Start difference. First operand 5056 states and 14759 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) [2021-08-06 20:03:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:42,367 INFO L93 Difference]: Finished difference Result 9979 states and 28764 transitions. [2021-08-06 20:03:42,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:03:42,368 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 [2021-08-06 20:03:42,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:42,398 INFO L225 Difference]: With dead ends: 9979 [2021-08-06 20:03:42,398 INFO L226 Difference]: Without dead ends: 9745 [2021-08-06 20:03:42,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:03:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9745 states. [2021-08-06 20:03:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9745 to 8088. [2021-08-06 20:03:42,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8088 states, 8087 states have (on average 2.971806603190305) internal successors, (24033), 8087 states have internal predecessors, (24033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8088 states to 8088 states and 24033 transitions. [2021-08-06 20:03:42,630 INFO L78 Accepts]: Start accepts. Automaton has 8088 states and 24033 transitions. Word has length 32 [2021-08-06 20:03:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:42,630 INFO L470 AbstractCegarLoop]: Abstraction has 8088 states and 24033 transitions. [2021-08-06 20:03:42,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) [2021-08-06 20:03:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 8088 states and 24033 transitions. [2021-08-06 20:03:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:03:42,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:42,656 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] [2021-08-06 20:03:42,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:42,869 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 [2021-08-06 20:03:42,870 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:42,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:42,870 INFO L82 PathProgramCache]: Analyzing trace with hash 224237731, now seen corresponding path program 10 times [2021-08-06 20:03:42,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:42,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129893461] [2021-08-06 20:03:42,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:42,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:42,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:42,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129893461] [2021-08-06 20:03:42,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129893461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:42,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386793492] [2021-08-06 20:03:42,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:03:42,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:42,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:42,969 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) [2021-08-06 20:03:42,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 20:03:43,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:03:43,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:43,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:03:43,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:03:43,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386793492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:43,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:43,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-08-06 20:03:43,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456637129] [2021-08-06 20:03:43,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:03:43,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:43,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:03:43,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:03:43,460 INFO L87 Difference]: Start difference. First operand 8088 states and 24033 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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) [2021-08-06 20:03:43,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:43,646 INFO L93 Difference]: Finished difference Result 10061 states and 28862 transitions. [2021-08-06 20:03:43,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:03:43,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 [2021-08-06 20:03:43,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:43,675 INFO L225 Difference]: With dead ends: 10061 [2021-08-06 20:03:43,675 INFO L226 Difference]: Without dead ends: 10061 [2021-08-06 20:03:43,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:03:43,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10061 states. [2021-08-06 20:03:43,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10061 to 7704. [2021-08-06 20:03:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7704 states, 7703 states have (on average 2.96988186420875) internal successors, (22877), 7703 states have internal predecessors, (22877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:43,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7704 states to 7704 states and 22877 transitions. [2021-08-06 20:03:43,968 INFO L78 Accepts]: Start accepts. Automaton has 7704 states and 22877 transitions. Word has length 32 [2021-08-06 20:03:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:43,968 INFO L470 AbstractCegarLoop]: Abstraction has 7704 states and 22877 transitions. [2021-08-06 20:03:43,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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) [2021-08-06 20:03:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 7704 states and 22877 transitions. [2021-08-06 20:03:44,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 20:03:44,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:44,000 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] [2021-08-06 20:03:44,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:44,220 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 [2021-08-06 20:03:44,221 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:44,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:44,221 INFO L82 PathProgramCache]: Analyzing trace with hash -265126371, now seen corresponding path program 11 times [2021-08-06 20:03:44,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:44,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98421790] [2021-08-06 20:03:44,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:44,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:03:44,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:44,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98421790] [2021-08-06 20:03:44,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98421790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:44,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912929615] [2021-08-06 20:03:44,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:03:44,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:44,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:44,332 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) [2021-08-06 20:03:44,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 20:03:44,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:03:44,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:44,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:03:44,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:03:44,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912929615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:44,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:44,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-06 20:03:44,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481432249] [2021-08-06 20:03:44,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:03:44,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:44,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:03:44,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:03:44,843 INFO L87 Difference]: Start difference. First operand 7704 states and 22877 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:45,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:45,006 INFO L93 Difference]: Finished difference Result 11728 states and 33823 transitions. [2021-08-06 20:03:45,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:03:45,007 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 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 [2021-08-06 20:03:45,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:45,034 INFO L225 Difference]: With dead ends: 11728 [2021-08-06 20:03:45,034 INFO L226 Difference]: Without dead ends: 11728 [2021-08-06 20:03:45,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:03:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11728 states. [2021-08-06 20:03:45,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11728 to 8768. [2021-08-06 20:03:45,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8768 states, 8767 states have (on average 3.001140641040265) internal successors, (26311), 8767 states have internal predecessors, (26311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8768 states to 8768 states and 26311 transitions. [2021-08-06 20:03:45,260 INFO L78 Accepts]: Start accepts. Automaton has 8768 states and 26311 transitions. Word has length 34 [2021-08-06 20:03:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:45,260 INFO L470 AbstractCegarLoop]: Abstraction has 8768 states and 26311 transitions. [2021-08-06 20:03:45,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand 8768 states and 26311 transitions. [2021-08-06 20:03:45,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 20:03:45,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:45,283 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] [2021-08-06 20:03:45,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:45,507 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 [2021-08-06 20:03:45,507 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:45,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:45,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1963352101, now seen corresponding path program 12 times [2021-08-06 20:03:45,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:45,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076135061] [2021-08-06 20:03:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:45,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:03:45,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:45,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076135061] [2021-08-06 20:03:45,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076135061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:45,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010391123] [2021-08-06 20:03:45,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:03:45,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:45,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:45,604 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) [2021-08-06 20:03:45,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 20:03:45,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:03:45,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:45,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:03:45,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:03:46,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010391123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:46,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:46,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 20:03:46,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252728778] [2021-08-06 20:03:46,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:03:46,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:46,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:03:46,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:03:46,170 INFO L87 Difference]: Start difference. First operand 8768 states and 26311 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 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) [2021-08-06 20:03:47,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:47,241 INFO L93 Difference]: Finished difference Result 30960 states and 93665 transitions. [2021-08-06 20:03:47,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:03:47,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 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 34 [2021-08-06 20:03:47,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:47,371 INFO L225 Difference]: With dead ends: 30960 [2021-08-06 20:03:47,371 INFO L226 Difference]: Without dead ends: 30402 [2021-08-06 20:03:47,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 466.4ms TimeCoverageRelationStatistics Valid=444, Invalid=1536, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:03:47,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30402 states. [2021-08-06 20:03:47,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30402 to 15251. [2021-08-06 20:03:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15251 states, 15250 states have (on average 3.264327868852459) internal successors, (49781), 15250 states have internal predecessors, (49781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15251 states to 15251 states and 49781 transitions. [2021-08-06 20:03:48,038 INFO L78 Accepts]: Start accepts. Automaton has 15251 states and 49781 transitions. Word has length 34 [2021-08-06 20:03:48,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:48,038 INFO L470 AbstractCegarLoop]: Abstraction has 15251 states and 49781 transitions. [2021-08-06 20:03:48,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 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) [2021-08-06 20:03:48,038 INFO L276 IsEmpty]: Start isEmpty. Operand 15251 states and 49781 transitions. [2021-08-06 20:03:48,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 20:03:48,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:48,078 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] [2021-08-06 20:03:48,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:48,303 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 [2021-08-06 20:03:48,304 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:48,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:48,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1291602081, now seen corresponding path program 13 times [2021-08-06 20:03:48,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:48,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690790825] [2021-08-06 20:03:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:48,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:03:48,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:48,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690790825] [2021-08-06 20:03:48,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690790825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:48,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909809222] [2021-08-06 20:03:48,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:03:48,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:48,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:48,404 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) [2021-08-06 20:03:48,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 20:03:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:48,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:03:48,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:48,876 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:48,877 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:03:48,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909809222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:48,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:48,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-08-06 20:03:48,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698211788] [2021-08-06 20:03:48,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:03:48,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:48,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:03:48,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:03:48,913 INFO L87 Difference]: Start difference. First operand 15251 states and 49781 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:49,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:49,489 INFO L93 Difference]: Finished difference Result 63078 states and 204306 transitions. [2021-08-06 20:03:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:03:49,490 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 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 [2021-08-06 20:03:49,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:49,912 INFO L225 Difference]: With dead ends: 63078 [2021-08-06 20:03:49,913 INFO L226 Difference]: Without dead ends: 62636 [2021-08-06 20:03:49,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:03:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62636 states. [2021-08-06 20:03:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62636 to 29012. [2021-08-06 20:03:50,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29012 states, 29011 states have (on average 3.3414222191582503) internal successors, (96938), 29011 states have internal predecessors, (96938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:51,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29012 states to 29012 states and 96938 transitions. [2021-08-06 20:03:51,156 INFO L78 Accepts]: Start accepts. Automaton has 29012 states and 96938 transitions. Word has length 34 [2021-08-06 20:03:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:51,157 INFO L470 AbstractCegarLoop]: Abstraction has 29012 states and 96938 transitions. [2021-08-06 20:03:51,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:51,157 INFO L276 IsEmpty]: Start isEmpty. Operand 29012 states and 96938 transitions. [2021-08-06 20:03:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 20:03:51,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:51,232 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] [2021-08-06 20:03:51,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:51,432 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 [2021-08-06 20:03:51,432 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:51,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:51,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1948934915, now seen corresponding path program 14 times [2021-08-06 20:03:51,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:51,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113938340] [2021-08-06 20:03:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:51,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:03:51,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:51,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113938340] [2021-08-06 20:03:51,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113938340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:51,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316562079] [2021-08-06 20:03:51,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:03:51,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:51,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:51,624 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) [2021-08-06 20:03:51,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 20:03:51,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:03:51,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:51,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:03:51,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:52,125 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:03:52,126 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:03:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:03:52,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316562079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:52,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:52,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-08-06 20:03:52,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761654575] [2021-08-06 20:03:52,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:03:52,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:52,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:03:52,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:03:52,208 INFO L87 Difference]: Start difference. First operand 29012 states and 96938 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:52,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:52,436 INFO L93 Difference]: Finished difference Result 33410 states and 108551 transitions. [2021-08-06 20:03:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:03:52,438 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 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 [2021-08-06 20:03:52,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:52,687 INFO L225 Difference]: With dead ends: 33410 [2021-08-06 20:03:52,687 INFO L226 Difference]: Without dead ends: 33089 [2021-08-06 20:03:52,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:03:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33089 states. [2021-08-06 20:03:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33089 to 28093. [2021-08-06 20:03:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28093 states, 28092 states have (on average 3.3400612273957) internal successors, (93829), 28092 states have internal predecessors, (93829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28093 states to 28093 states and 93829 transitions. [2021-08-06 20:03:53,406 INFO L78 Accepts]: Start accepts. Automaton has 28093 states and 93829 transitions. Word has length 34 [2021-08-06 20:03:53,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:53,406 INFO L470 AbstractCegarLoop]: Abstraction has 28093 states and 93829 transitions. [2021-08-06 20:03:53,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:53,406 INFO L276 IsEmpty]: Start isEmpty. Operand 28093 states and 93829 transitions. [2021-08-06 20:03:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:03:53,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:53,476 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] [2021-08-06 20:03:53,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-06 20:03:53,688 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 [2021-08-06 20:03:53,689 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:53,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:53,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2044098847, now seen corresponding path program 15 times [2021-08-06 20:03:53,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:53,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890511686] [2021-08-06 20:03:53,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:53,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 20:03:53,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:53,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890511686] [2021-08-06 20:03:53,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890511686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:53,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859131885] [2021-08-06 20:03:53,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:03:53,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:53,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:53,895 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) [2021-08-06 20:03:53,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 20:03:54,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:03:54,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:54,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:03:54,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:54,502 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:54,502 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 20:03:54,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859131885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:54,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:54,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-08-06 20:03:54,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186891074] [2021-08-06 20:03:54,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:03:54,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:03:54,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:03:54,540 INFO L87 Difference]: Start difference. First operand 28093 states and 93829 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:55,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:55,285 INFO L93 Difference]: Finished difference Result 76049 states and 245040 transitions. [2021-08-06 20:03:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:03:55,285 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:03:55,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:55,595 INFO L225 Difference]: With dead ends: 76049 [2021-08-06 20:03:55,595 INFO L226 Difference]: Without dead ends: 75941 [2021-08-06 20:03:55,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:03:55,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75941 states. [2021-08-06 20:03:56,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75941 to 41685. [2021-08-06 20:03:56,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41685 states, 41684 states have (on average 3.4475338259284136) internal successors, (143707), 41684 states have internal predecessors, (143707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:57,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41685 states to 41685 states and 143707 transitions. [2021-08-06 20:03:57,187 INFO L78 Accepts]: Start accepts. Automaton has 41685 states and 143707 transitions. Word has length 36 [2021-08-06 20:03:57,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:57,187 INFO L470 AbstractCegarLoop]: Abstraction has 41685 states and 143707 transitions. [2021-08-06 20:03:57,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:57,187 INFO L276 IsEmpty]: Start isEmpty. Operand 41685 states and 143707 transitions. [2021-08-06 20:03:57,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:03:57,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:57,287 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] [2021-08-06 20:03:57,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:57,487 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 [2021-08-06 20:03:57,488 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:03:57,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:57,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1751058975, now seen corresponding path program 16 times [2021-08-06 20:03:57,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:57,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284379335] [2021-08-06 20:03:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:57,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:03:57,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:57,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284379335] [2021-08-06 20:03:57,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284379335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:57,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121826110] [2021-08-06 20:03:57,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:03:57,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:57,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:57,567 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) [2021-08-06 20:03:57,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 20:03:58,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:03:58,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:58,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:03:58,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:58,304 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:58,304 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:03:58,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 20:03:58,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121826110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:58,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:58,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-08-06 20:03:58,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360967850] [2021-08-06 20:03:58,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:03:58,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:58,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:03:58,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:03:58,346 INFO L87 Difference]: Start difference. First operand 41685 states and 143707 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) [2021-08-06 20:03:59,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:59,381 INFO L93 Difference]: Finished difference Result 115392 states and 389112 transitions. [2021-08-06 20:03:59,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:03:59,381 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 [2021-08-06 20:03:59,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:59,992 INFO L225 Difference]: With dead ends: 115392 [2021-08-06 20:03:59,993 INFO L226 Difference]: Without dead ends: 115298 [2021-08-06 20:03:59,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:04:00,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115298 states. [2021-08-06 20:04:02,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115298 to 85729. [2021-08-06 20:04:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85729 states, 85728 states have (on average 3.503277808883912) internal successors, (300329), 85728 states have internal predecessors, (300329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85729 states to 85729 states and 300329 transitions. [2021-08-06 20:04:03,128 INFO L78 Accepts]: Start accepts. Automaton has 85729 states and 300329 transitions. Word has length 36 [2021-08-06 20:04:03,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:03,129 INFO L470 AbstractCegarLoop]: Abstraction has 85729 states and 300329 transitions. [2021-08-06 20:04:03,129 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) [2021-08-06 20:04:03,129 INFO L276 IsEmpty]: Start isEmpty. Operand 85729 states and 300329 transitions. [2021-08-06 20:04:03,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:04:03,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:03,625 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] [2021-08-06 20:04:03,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:03,840 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 [2021-08-06 20:04:03,841 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:04:03,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:03,841 INFO L82 PathProgramCache]: Analyzing trace with hash 390366935, now seen corresponding path program 17 times [2021-08-06 20:04:03,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:03,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45709704] [2021-08-06 20:04:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:03,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:04:03,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:03,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45709704] [2021-08-06 20:04:03,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45709704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:03,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116877691] [2021-08-06 20:04:03,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:04:03,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:03,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:03,901 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) [2021-08-06 20:04:03,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 20:04:04,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:04:04,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:04,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:04:04,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:04,473 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:04:04,473 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:04:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:04:04,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116877691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:04,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:04,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-08-06 20:04:04,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433552880] [2021-08-06 20:04:04,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:04:04,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:04,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:04:04,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:04:04,519 INFO L87 Difference]: Start difference. First operand 85729 states and 300329 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:05,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:05,474 INFO L93 Difference]: Finished difference Result 98669 states and 334391 transitions. [2021-08-06 20:04:05,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:04:05,474 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:04:05,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:05,960 INFO L225 Difference]: With dead ends: 98669 [2021-08-06 20:04:05,960 INFO L226 Difference]: Without dead ends: 97623 [2021-08-06 20:04:05,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:04:06,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97623 states. [2021-08-06 20:04:07,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97623 to 85066. [2021-08-06 20:04:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85066 states, 85065 states have (on average 3.488520543114089) internal successors, (296751), 85065 states have internal predecessors, (296751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85066 states to 85066 states and 296751 transitions. [2021-08-06 20:04:08,938 INFO L78 Accepts]: Start accepts. Automaton has 85066 states and 296751 transitions. Word has length 36 [2021-08-06 20:04:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:08,938 INFO L470 AbstractCegarLoop]: Abstraction has 85066 states and 296751 transitions. [2021-08-06 20:04:08,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand 85066 states and 296751 transitions. [2021-08-06 20:04:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:04:09,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:09,170 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] [2021-08-06 20:04:09,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:09,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-06 20:04:09,371 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:04:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1829894877, now seen corresponding path program 18 times [2021-08-06 20:04:09,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:09,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294361609] [2021-08-06 20:04:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:09,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:04:09,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:09,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294361609] [2021-08-06 20:04:09,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294361609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:09,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816103621] [2021-08-06 20:04:09,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:04:09,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:09,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:09,455 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:09,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 20:04:10,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:04:10,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:10,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:04:10,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:10,408 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:04:10,408 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:04:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:04:10,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816103621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:10,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:10,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-08-06 20:04:10,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336509749] [2021-08-06 20:04:10,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:04:10,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:10,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:04:10,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:04:10,435 INFO L87 Difference]: Start difference. First operand 85066 states and 296751 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:11,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:11,569 INFO L93 Difference]: Finished difference Result 139355 states and 468771 transitions. [2021-08-06 20:04:11,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:04:11,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:04:11,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:12,577 INFO L225 Difference]: With dead ends: 139355 [2021-08-06 20:04:12,578 INFO L226 Difference]: Without dead ends: 139280 [2021-08-06 20:04:12,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:04:12,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139280 states. [2021-08-06 20:04:15,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139280 to 103044. [2021-08-06 20:04:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103044 states, 103043 states have (on average 3.5351067030268917) internal successors, (364268), 103043 states have internal predecessors, (364268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103044 states to 103044 states and 364268 transitions. [2021-08-06 20:04:16,101 INFO L78 Accepts]: Start accepts. Automaton has 103044 states and 364268 transitions. Word has length 36 [2021-08-06 20:04:16,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:16,102 INFO L470 AbstractCegarLoop]: Abstraction has 103044 states and 364268 transitions. [2021-08-06 20:04:16,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:16,102 INFO L276 IsEmpty]: Start isEmpty. Operand 103044 states and 364268 transitions. [2021-08-06 20:04:16,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 20:04:16,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:16,831 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] [2021-08-06 20:04:16,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:17,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-06 20:04:17,032 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:04:17,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:17,032 INFO L82 PathProgramCache]: Analyzing trace with hash -831680483, now seen corresponding path program 19 times [2021-08-06 20:04:17,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:17,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186456656] [2021-08-06 20:04:17,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:17,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:17,122 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:04:17,124 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:04:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:04:17,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:17,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186456656] [2021-08-06 20:04:17,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186456656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:17,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749438664] [2021-08-06 20:04:17,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:04:17,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:17,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:17,145 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:17,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 20:04:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:17,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 20:04:17,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:04:18,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749438664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:18,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:18,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-06 20:04:18,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279311875] [2021-08-06 20:04:18,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:04:18,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:18,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:04:18,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:04:18,155 INFO L87 Difference]: Start difference. First operand 103044 states and 364268 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 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) [2021-08-06 20:04:20,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:20,257 INFO L93 Difference]: Finished difference Result 215512 states and 745630 transitions. [2021-08-06 20:04:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:04:20,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 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 [2021-08-06 20:04:20,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:21,779 INFO L225 Difference]: With dead ends: 215512 [2021-08-06 20:04:21,779 INFO L226 Difference]: Without dead ends: 206036 [2021-08-06 20:04:21,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:04:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206036 states. [2021-08-06 20:04:25,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206036 to 145703. [2021-08-06 20:04:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145703 states, 145702 states have (on average 3.561488517659332) internal successors, (518916), 145702 states have internal predecessors, (518916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:26,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145703 states to 145703 states and 518916 transitions. [2021-08-06 20:04:26,957 INFO L78 Accepts]: Start accepts. Automaton has 145703 states and 518916 transitions. Word has length 38 [2021-08-06 20:04:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:26,957 INFO L470 AbstractCegarLoop]: Abstraction has 145703 states and 518916 transitions. [2021-08-06 20:04:26,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 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) [2021-08-06 20:04:26,957 INFO L276 IsEmpty]: Start isEmpty. Operand 145703 states and 518916 transitions. [2021-08-06 20:04:27,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 20:04:27,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:27,833 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] [2021-08-06 20:04:27,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:28,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:28,037 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:04:28,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:28,039 INFO L82 PathProgramCache]: Analyzing trace with hash -407024359, now seen corresponding path program 20 times [2021-08-06 20:04:28,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:28,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942914333] [2021-08-06 20:04:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:28,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:28,142 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:04:28,143 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:04:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:04:28,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:28,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942914333] [2021-08-06 20:04:28,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942914333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:28,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923058288] [2021-08-06 20:04:28,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:04:28,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:28,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:28,157 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:28,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 20:04:28,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:04:28,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:28,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 20:04:28,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:04:29,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923058288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:29,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:29,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-08-06 20:04:29,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620077022] [2021-08-06 20:04:29,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:04:29,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:29,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:04:29,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:04:29,152 INFO L87 Difference]: Start difference. First operand 145703 states and 518916 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) [2021-08-06 20:04:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:32,751 INFO L93 Difference]: Finished difference Result 288754 states and 1007898 transitions. [2021-08-06 20:04:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:04:32,752 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 [2021-08-06 20:04:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:34,798 INFO L225 Difference]: With dead ends: 288754 [2021-08-06 20:04:34,799 INFO L226 Difference]: Without dead ends: 279425 [2021-08-06 20:04:34,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:04:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279425 states. [2021-08-06 20:04:41,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279425 to 192789. [2021-08-06 20:04:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192789 states, 192788 states have (on average 3.5864369151606947) internal successors, (691422), 192788 states have internal predecessors, (691422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:43,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192789 states to 192789 states and 691422 transitions. [2021-08-06 20:04:43,208 INFO L78 Accepts]: Start accepts. Automaton has 192789 states and 691422 transitions. Word has length 38 [2021-08-06 20:04:43,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:43,208 INFO L470 AbstractCegarLoop]: Abstraction has 192789 states and 691422 transitions. [2021-08-06 20:04:43,208 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) [2021-08-06 20:04:43,208 INFO L276 IsEmpty]: Start isEmpty. Operand 192789 states and 691422 transitions. [2021-08-06 20:04:44,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 20:04:44,156 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:44,156 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] [2021-08-06 20:04:44,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:44,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 20:04:44,380 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:04:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:44,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1206304031, now seen corresponding path program 21 times [2021-08-06 20:04:44,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:44,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097378224] [2021-08-06 20:04:44,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:44,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 20:04:44,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:44,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097378224] [2021-08-06 20:04:44,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097378224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:44,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549046124] [2021-08-06 20:04:44,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:04:44,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:44,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:44,473 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:44,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 20:04:44,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:04:44,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:44,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:04:44,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 20:04:45,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549046124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:45,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:45,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 20:04:45,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58124148] [2021-08-06 20:04:45,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:04:45,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:45,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:04:45,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:04:45,234 INFO L87 Difference]: Start difference. First operand 192789 states and 691422 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:53,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:53,215 INFO L93 Difference]: Finished difference Result 632616 states and 2153151 transitions. [2021-08-06 20:04:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 20:04:53,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 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 [2021-08-06 20:04:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:58,320 INFO L225 Difference]: With dead ends: 632616 [2021-08-06 20:04:58,320 INFO L226 Difference]: Without dead ends: 628324 [2021-08-06 20:04:58,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 725.4ms TimeCoverageRelationStatistics Valid=971, Invalid=2935, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 20:04:59,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628324 states. [2021-08-06 20:05:12,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628324 to 278340. [2021-08-06 20:05:13,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278340 states, 278339 states have (on average 3.4834608157678226) internal successors, (969583), 278339 states have internal predecessors, (969583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:16,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278340 states to 278340 states and 969583 transitions. [2021-08-06 20:05:16,580 INFO L78 Accepts]: Start accepts. Automaton has 278340 states and 969583 transitions. Word has length 40 [2021-08-06 20:05:16,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:16,580 INFO L470 AbstractCegarLoop]: Abstraction has 278340 states and 969583 transitions. [2021-08-06 20:05:16,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:16,580 INFO L276 IsEmpty]: Start isEmpty. Operand 278340 states and 969583 transitions. [2021-08-06 20:05:18,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 20:05:18,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:18,487 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] [2021-08-06 20:05:18,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-06 20:05:18,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 20:05:18,688 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:05:18,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:18,688 INFO L82 PathProgramCache]: Analyzing trace with hash 288772639, now seen corresponding path program 22 times [2021-08-06 20:05:18,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:18,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784628093] [2021-08-06 20:05:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:18,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:05:18,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:18,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784628093] [2021-08-06 20:05:18,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784628093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:18,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035513637] [2021-08-06 20:05:18,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:05:18,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:18,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:18,836 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:05:18,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 20:05:19,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:05:19,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:19,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:05:19,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:19,666 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:05:19,666 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:05:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:05:19,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035513637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:19,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:19,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-06 20:05:19,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880221316] [2021-08-06 20:05:19,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:05:19,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:19,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:05:19,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:05:19,713 INFO L87 Difference]: Start difference. First operand 278340 states and 969583 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:27,306 INFO L93 Difference]: Finished difference Result 495388 states and 1711009 transitions. [2021-08-06 20:05:27,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:05:27,308 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 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 [2021-08-06 20:05:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:34,093 INFO L225 Difference]: With dead ends: 495388 [2021-08-06 20:05:34,094 INFO L226 Difference]: Without dead ends: 495186 [2021-08-06 20:05:34,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:05:35,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495186 states. [2021-08-06 20:05:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495186 to 427033. [2021-08-06 20:05:53,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427033 states, 427032 states have (on average 3.530791603439555) internal successors, (1507761), 427032 states have internal predecessors, (1507761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427033 states to 427033 states and 1507761 transitions. [2021-08-06 20:05:57,127 INFO L78 Accepts]: Start accepts. Automaton has 427033 states and 1507761 transitions. Word has length 40 [2021-08-06 20:05:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:57,127 INFO L470 AbstractCegarLoop]: Abstraction has 427033 states and 1507761 transitions. [2021-08-06 20:05:57,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:57,127 INFO L276 IsEmpty]: Start isEmpty. Operand 427033 states and 1507761 transitions. [2021-08-06 20:05:59,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 20:05:59,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:59,527 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] [2021-08-06 20:05:59,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 20:05:59,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:59,728 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 20:05:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:59,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1235030565, now seen corresponding path program 23 times [2021-08-06 20:05:59,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:59,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697573748] [2021-08-06 20:05:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:59,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:05:59,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:59,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697573748] [2021-08-06 20:05:59,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697573748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:59,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66671852] [2021-08-06 20:05:59,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:05:59,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:59,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:59,845 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:05:59,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 20:06:00,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:06:00,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:00,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:06:00,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 20:06:00,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66671852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:00,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:00,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-06 20:06:00,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355071421] [2021-08-06 20:06:00,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:06:00,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:00,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:06:00,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:06:00,815 INFO L87 Difference]: Start difference. First operand 427033 states and 1507761 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:24,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:24,333 INFO L93 Difference]: Finished difference Result 1539754 states and 5595764 transitions. [2021-08-06 20:06:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-06 20:06:24,334 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 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 [2021-08-06 20:06:24,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:51,002 INFO L225 Difference]: With dead ends: 1539754 [2021-08-06 20:06:51,002 INFO L226 Difference]: Without dead ends: 1537137 [2021-08-06 20:06:51,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 978.8ms TimeCoverageRelationStatistics Valid=997, Invalid=3973, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 20:06:54,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537137 states.