/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/parallel/misc-3-extended.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 19:51:55,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 19:51:55,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 19:51:55,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 19:51:55,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 19:51:55,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 19:51:55,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 19:51:55,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 19:51:55,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 19:51:55,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 19:51:55,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 19:51:55,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 19:51:55,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 19:51:55,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 19:51:55,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 19:51:55,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 19:51:55,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-06 19:51:55,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 19:51:55,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 19:51:55,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 19:51:55,413 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 19:51:55,431 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 19:51:55,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 19:51:55,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 19:51:55,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 19:51:55,433 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 19:51:55,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 19:51:55,434 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 19:51:55,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 19:51:55,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 19:51:55,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 19:51:55,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 19:51:55,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 19:51:55,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 19:51:55,435 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 19:51:55,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 19:51:55,435 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 19:51:55,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 19:51:55,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 19:51:55,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 19:51:55,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 19:51:55,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 19:51:55,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:51:55,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 19:51:55,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 19:51:55,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 19:51:55,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 19:51:55,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 19:51:55,437 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 19:51:55,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 19:51:55,438 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 19:51:55,438 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 19:51:55,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 19:51:55,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 19:51:55,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 19:51:55,745 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 19:51:55,757 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 19:51:55,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3-extended.wvr.bpl [2021-08-06 19:51:55,758 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3-extended.wvr.bpl' [2021-08-06 19:51:55,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 19:51:55,801 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 19:51:55,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 19:51:55,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 19:51:55,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 19:51:55,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:51:55" (1/1) ... [2021-08-06 19:51:55,820 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:51:55" (1/1) ... [2021-08-06 19:51:55,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 19:51:55,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 19:51:55,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 19:51:55,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 19:51:55,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:51:55" (1/1) ... [2021-08-06 19:51:55,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:51:55" (1/1) ... [2021-08-06 19:51:55,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:51:55" (1/1) ... [2021-08-06 19:51:55,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:51:55" (1/1) ... [2021-08-06 19:51:55,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:51:55" (1/1) ... [2021-08-06 19:51:55,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:51:55" (1/1) ... [2021-08-06 19:51:55,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:51:55" (1/1) ... [2021-08-06 19:51:55,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 19:51:55,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 19:51:55,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 19:51:55,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 19:51:55,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:51:55" (1/1) ... [2021-08-06 19:51:55,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:51:55,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:51:55,882 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 19:51:55,907 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 19:51:55,923 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 19:51:55,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 19:51:55,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 19:51:55,923 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 19:51:55,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 19:51:55,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 19:51:55,924 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 19:51:55,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 19:51:55,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 19:51:55,924 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 19:51:55,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 19:51:55,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 19:51:55,925 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 19:51:56,103 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 19:51:56,103 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 19:51:56,105 INFO L202 PluginConnector]: Adding new model misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:51:56 BoogieIcfgContainer [2021-08-06 19:51:56,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 19:51:56,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 19:51:56,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 19:51:56,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 19:51:56,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:51:55" (1/2) ... [2021-08-06 19:51:56,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55736e70 and model type misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 07:51:56, skipping insertion in model container [2021-08-06 19:51:56,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:51:56" (2/2) ... [2021-08-06 19:51:56,111 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-3-extended.wvr.bpl [2021-08-06 19:51:56,115 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 19:51:56,115 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 19:51:56,115 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 19:51:56,115 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 19:51:56,149 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 19:51:56,186 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 19:51:56,191 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 19:51:56,191 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 19:51:56,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 914 states, 751 states have (on average 1.758988015978695) internal successors, (1321), 913 states have internal predecessors, (1321), 0 states have call successors, (0), 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 19:51:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:51:56,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:51:56,565 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:51:56,566 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:51:56,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:51:56,570 INFO L82 PathProgramCache]: Analyzing trace with hash -2081441964, now seen corresponding path program 1 times [2021-08-06 19:51:56,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:51:56,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255906769] [2021-08-06 19:51:56,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:51:56,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:51:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:51:56,688 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 19:51:56,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:51:56,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255906769] [2021-08-06 19:51:56,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255906769] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:51:56,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:51:56,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 19:51:56,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4570904] [2021-08-06 19:51:56,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:51:56,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:51:56,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:51:56,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:51:56,711 INFO L87 Difference]: Start difference. First operand has 914 states, 751 states have (on average 1.758988015978695) internal successors, (1321), 913 states have internal predecessors, (1321), 0 states have call successors, (0), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 19:51:56,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:51:56,751 INFO L93 Difference]: Finished difference Result 1005 states and 1458 transitions. [2021-08-06 19:51:56,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:51:56,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-08-06 19:51:56,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:51:56,769 INFO L225 Difference]: With dead ends: 1005 [2021-08-06 19:51:56,769 INFO L226 Difference]: Without dead ends: 577 [2021-08-06 19:51:56,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:51:56,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-06 19:51:56,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-08-06 19:51:56,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 1.6493055555555556) internal successors, (950), 576 states have internal predecessors, (950), 0 states have call successors, (0), 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 19:51:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 950 transitions. [2021-08-06 19:51:56,840 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 950 transitions. Word has length 15 [2021-08-06 19:51:56,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:51:56,841 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 950 transitions. [2021-08-06 19:51:56,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 19:51:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 950 transitions. [2021-08-06 19:51:56,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:51:56,844 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:51:56,844 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] [2021-08-06 19:51:56,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 19:51:56,845 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:51:56,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:51:56,846 INFO L82 PathProgramCache]: Analyzing trace with hash -547611155, now seen corresponding path program 1 times [2021-08-06 19:51:56,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:51:56,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47790945] [2021-08-06 19:51:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:51:56,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:51:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:51:56,878 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 19:51:56,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:51:56,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47790945] [2021-08-06 19:51:56,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47790945] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:51:56,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:51:56,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:51:56,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550752547] [2021-08-06 19:51:56,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:51:56,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:51:56,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:51:56,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:51:56,881 INFO L87 Difference]: Start difference. First operand 577 states and 950 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 19:51:56,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:51:56,912 INFO L93 Difference]: Finished difference Result 805 states and 1318 transitions. [2021-08-06 19:51:56,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:51:56,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-08-06 19:51:56,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:51:56,917 INFO L225 Difference]: With dead ends: 805 [2021-08-06 19:51:56,918 INFO L226 Difference]: Without dead ends: 805 [2021-08-06 19:51:56,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:51:56,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-08-06 19:51:56,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 805. [2021-08-06 19:51:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 1.6393034825870647) internal successors, (1318), 804 states have internal predecessors, (1318), 0 states have call successors, (0), 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 19:51:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1318 transitions. [2021-08-06 19:51:56,961 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1318 transitions. Word has length 21 [2021-08-06 19:51:56,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:51:56,961 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 1318 transitions. [2021-08-06 19:51:56,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 19:51:56,962 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1318 transitions. [2021-08-06 19:51:56,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:51:56,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:51:56,964 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] [2021-08-06 19:51:56,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 19:51:56,965 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:51:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:51:56,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1348389007, now seen corresponding path program 1 times [2021-08-06 19:51:56,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:51:56,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076041183] [2021-08-06 19:51:56,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:51:56,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:51:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:51:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 19:51:57,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:51:57,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076041183] [2021-08-06 19:51:57,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076041183] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:51:57,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:51:57,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 19:51:57,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163099776] [2021-08-06 19:51:57,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:51:57,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:51:57,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:51:57,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:51:57,004 INFO L87 Difference]: Start difference. First operand 805 states and 1318 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 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 19:51:57,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:51:57,016 INFO L93 Difference]: Finished difference Result 915 states and 1515 transitions. [2021-08-06 19:51:57,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:51:57,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 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 26 [2021-08-06 19:51:57,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:51:57,021 INFO L225 Difference]: With dead ends: 915 [2021-08-06 19:51:57,021 INFO L226 Difference]: Without dead ends: 915 [2021-08-06 19:51:57,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:51:57,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-08-06 19:51:57,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 915. [2021-08-06 19:51:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 1.6575492341356675) internal successors, (1515), 914 states have internal predecessors, (1515), 0 states have call successors, (0), 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 19:51:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1515 transitions. [2021-08-06 19:51:57,044 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1515 transitions. Word has length 26 [2021-08-06 19:51:57,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:51:57,045 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 1515 transitions. [2021-08-06 19:51:57,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 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 19:51:57,046 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1515 transitions. [2021-08-06 19:51:57,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:51:57,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:51:57,048 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 19:51:57,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 19:51:57,049 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:51:57,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:51:57,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1801373176, now seen corresponding path program 1 times [2021-08-06 19:51:57,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:51:57,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142248852] [2021-08-06 19:51:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:51:57,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:51:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:51:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 19:51:57,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:51:57,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142248852] [2021-08-06 19:51:57,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142248852] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:51:57,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:51:57,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 19:51:57,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075284407] [2021-08-06 19:51:57,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:51:57,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:51:57,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:51:57,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:51:57,095 INFO L87 Difference]: Start difference. First operand 915 states and 1515 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 19:51:57,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:51:57,115 INFO L93 Difference]: Finished difference Result 1029 states and 1815 transitions. [2021-08-06 19:51:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:51:57,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 19:51:57,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:51:57,120 INFO L225 Difference]: With dead ends: 1029 [2021-08-06 19:51:57,120 INFO L226 Difference]: Without dead ends: 1029 [2021-08-06 19:51:57,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:51:57,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-08-06 19:51:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 1029. [2021-08-06 19:51:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 1.7655642023346303) internal successors, (1815), 1028 states have internal predecessors, (1815), 0 states have call successors, (0), 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 19:51:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1815 transitions. [2021-08-06 19:51:57,143 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1815 transitions. Word has length 32 [2021-08-06 19:51:57,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:51:57,144 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 1815 transitions. [2021-08-06 19:51:57,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 19:51:57,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1815 transitions. [2021-08-06 19:51:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:51:57,148 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:51:57,148 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, 1, 1, 1, 1, 1, 1] [2021-08-06 19:51:57,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 19:51:57,151 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:51:57,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:51:57,152 INFO L82 PathProgramCache]: Analyzing trace with hash 801324401, now seen corresponding path program 1 times [2021-08-06 19:51:57,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:51:57,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467038895] [2021-08-06 19:51:57,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:51:57,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:51:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:51:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 19:51:57,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:51:57,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467038895] [2021-08-06 19:51:57,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467038895] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:51:57,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:51:57,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 19:51:57,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878993751] [2021-08-06 19:51:57,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:51:57,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:51:57,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:51:57,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:51:57,229 INFO L87 Difference]: Start difference. First operand 1029 states and 1815 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:51:57,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:51:57,244 INFO L93 Difference]: Finished difference Result 1371 states and 2343 transitions. [2021-08-06 19:51:57,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:51:57,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:51:57,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:51:57,249 INFO L225 Difference]: With dead ends: 1371 [2021-08-06 19:51:57,250 INFO L226 Difference]: Without dead ends: 1371 [2021-08-06 19:51:57,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:51:57,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-08-06 19:51:57,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1257. [2021-08-06 19:51:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 1.7746815286624205) internal successors, (2229), 1256 states have internal predecessors, (2229), 0 states have call successors, (0), 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 19:51:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 2229 transitions. [2021-08-06 19:51:57,294 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 2229 transitions. Word has length 38 [2021-08-06 19:51:57,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:51:57,295 INFO L470 AbstractCegarLoop]: Abstraction has 1257 states and 2229 transitions. [2021-08-06 19:51:57,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:51:57,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 2229 transitions. [2021-08-06 19:51:57,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:51:57,300 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:51:57,300 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, 1, 1, 1, 1, 1, 1] [2021-08-06 19:51:57,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 19:51:57,301 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:51:57,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:51:57,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1825774255, now seen corresponding path program 1 times [2021-08-06 19:51:57,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:51:57,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116929849] [2021-08-06 19:51:57,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:51:57,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:51:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:51:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:51:57,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:51:57,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116929849] [2021-08-06 19:51:57,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116929849] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:51:57,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:51:57,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:51:57,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710534426] [2021-08-06 19:51:57,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:51:57,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:51:57,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:51:57,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:51:57,367 INFO L87 Difference]: Start difference. First operand 1257 states and 2229 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:51:57,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:51:57,401 INFO L93 Difference]: Finished difference Result 1865 states and 3126 transitions. [2021-08-06 19:51:57,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:51:57,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:51:57,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:51:57,408 INFO L225 Difference]: With dead ends: 1865 [2021-08-06 19:51:57,408 INFO L226 Difference]: Without dead ends: 1865 [2021-08-06 19:51:57,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:51:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-08-06 19:51:57,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1865. [2021-08-06 19:51:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 1.6770386266094421) internal successors, (3126), 1864 states have internal predecessors, (3126), 0 states have call successors, (0), 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 19:51:57,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 3126 transitions. [2021-08-06 19:51:57,445 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 3126 transitions. Word has length 38 [2021-08-06 19:51:57,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:51:57,446 INFO L470 AbstractCegarLoop]: Abstraction has 1865 states and 3126 transitions. [2021-08-06 19:51:57,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:51:57,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 3126 transitions. [2021-08-06 19:51:57,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 19:51:57,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:51:57,460 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:51:57,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 19:51:57,460 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:51:57,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:51:57,461 INFO L82 PathProgramCache]: Analyzing trace with hash -344282685, now seen corresponding path program 1 times [2021-08-06 19:51:57,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:51:57,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912022902] [2021-08-06 19:51:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:51:57,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:51:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:51:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-06 19:51:57,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:51:57,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912022902] [2021-08-06 19:51:57,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912022902] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:51:57,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:51:57,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:51:57,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106463224] [2021-08-06 19:51:57,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:51:57,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:51:57,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:51:57,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:51:57,508 INFO L87 Difference]: Start difference. First operand 1865 states and 3126 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 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 19:51:57,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:51:57,530 INFO L93 Difference]: Finished difference Result 2205 states and 3126 transitions. [2021-08-06 19:51:57,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:51:57,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 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 43 [2021-08-06 19:51:57,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:51:57,538 INFO L225 Difference]: With dead ends: 2205 [2021-08-06 19:51:57,538 INFO L226 Difference]: Without dead ends: 2205 [2021-08-06 19:51:57,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:51:57,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-08-06 19:51:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 2205. [2021-08-06 19:51:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 1.4183303085299455) internal successors, (3126), 2204 states have internal predecessors, (3126), 0 states have call successors, (0), 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 19:51:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 3126 transitions. [2021-08-06 19:51:57,582 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 3126 transitions. Word has length 43 [2021-08-06 19:51:57,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:51:57,583 INFO L470 AbstractCegarLoop]: Abstraction has 2205 states and 3126 transitions. [2021-08-06 19:51:57,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 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 19:51:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 3126 transitions. [2021-08-06 19:51:57,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:51:57,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:51:57,588 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:51:57,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 19:51:57,589 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:51:57,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:51:57,589 INFO L82 PathProgramCache]: Analyzing trace with hash -208634669, now seen corresponding path program 1 times [2021-08-06 19:51:57,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:51:57,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037681949] [2021-08-06 19:51:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:51:57,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:51:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:51:57,772 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:51:57,775 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:51:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:51:57,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:51:57,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037681949] [2021-08-06 19:51:57,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037681949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:51:57,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309207909] [2021-08-06 19:51:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:51:57,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:51:57,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:51:57,793 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 19:51:57,797 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 19:51:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:51:57,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:51:57,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:51:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:51:58,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309207909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:51:58,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:51:58,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-06 19:51:58,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14922791] [2021-08-06 19:51:58,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:51:58,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:51:58,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:51:58,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:51:58,484 INFO L87 Difference]: Start difference. First operand 2205 states and 3126 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 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 19:51:58,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:51:58,566 INFO L93 Difference]: Finished difference Result 3410 states and 4948 transitions. [2021-08-06 19:51:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:51:58,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 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 48 [2021-08-06 19:51:58,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:51:58,580 INFO L225 Difference]: With dead ends: 3410 [2021-08-06 19:51:58,580 INFO L226 Difference]: Without dead ends: 3381 [2021-08-06 19:51:58,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:51:58,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3381 states. [2021-08-06 19:51:58,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3381 to 2981. [2021-08-06 19:51:58,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2980 states have (on average 1.4348993288590604) internal successors, (4276), 2980 states have internal predecessors, (4276), 0 states have call successors, (0), 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 19:51:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 4276 transitions. [2021-08-06 19:51:58,641 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 4276 transitions. Word has length 48 [2021-08-06 19:51:58,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:51:58,642 INFO L470 AbstractCegarLoop]: Abstraction has 2981 states and 4276 transitions. [2021-08-06 19:51:58,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 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 19:51:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 4276 transitions. [2021-08-06 19:51:58,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:51:58,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:51:58,658 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:51:58,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-06 19:51:58,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:51:58,873 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:51:58,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:51:58,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1873483885, now seen corresponding path program 2 times [2021-08-06 19:51:58,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:51:58,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132414533] [2021-08-06 19:51:58,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:51:58,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:51:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:51:58,996 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:51:58,997 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:51:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:51:59,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:51:59,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132414533] [2021-08-06 19:51:59,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132414533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:51:59,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438615211] [2021-08-06 19:51:59,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:51:59,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:51:59,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:51:59,006 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 19:51:59,008 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 19:51:59,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:51:59,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:51:59,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:51:59,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:51:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:51:59,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438615211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:51:59,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:51:59,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-06 19:51:59,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614027999] [2021-08-06 19:51:59,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:51:59,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:51:59,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:51:59,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:51:59,671 INFO L87 Difference]: Start difference. First operand 2981 states and 4276 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 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 19:51:59,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:51:59,756 INFO L93 Difference]: Finished difference Result 4546 states and 6558 transitions. [2021-08-06 19:51:59,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:51:59,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 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 48 [2021-08-06 19:51:59,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:51:59,771 INFO L225 Difference]: With dead ends: 4546 [2021-08-06 19:51:59,771 INFO L226 Difference]: Without dead ends: 4087 [2021-08-06 19:51:59,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:51:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4087 states. [2021-08-06 19:51:59,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4087 to 3044. [2021-08-06 19:51:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 3043 states have (on average 1.415379559645087) internal successors, (4307), 3043 states have internal predecessors, (4307), 0 states have call successors, (0), 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 19:51:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 4307 transitions. [2021-08-06 19:51:59,837 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 4307 transitions. Word has length 48 [2021-08-06 19:51:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:51:59,837 INFO L470 AbstractCegarLoop]: Abstraction has 3044 states and 4307 transitions. [2021-08-06 19:51:59,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 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 19:51:59,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 4307 transitions. [2021-08-06 19:51:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:51:59,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:51:59,844 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:51:59,870 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 19:52:00,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-06 19:52:00,057 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:00,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:00,057 INFO L82 PathProgramCache]: Analyzing trace with hash 426116013, now seen corresponding path program 3 times [2021-08-06 19:52:00,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:00,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127754920] [2021-08-06 19:52:00,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:00,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:00,131 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:52:00,132 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:52:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:52:00,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:00,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127754920] [2021-08-06 19:52:00,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127754920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:00,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539175353] [2021-08-06 19:52:00,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:52:00,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:00,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:00,141 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 19:52:00,168 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 19:52:00,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:52:00,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:00,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:52:00,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:52:00,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539175353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:00,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:00,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-06 19:52:00,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615285665] [2021-08-06 19:52:00,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:52:00,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:00,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:52:00,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:52:00,801 INFO L87 Difference]: Start difference. First operand 3044 states and 4307 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 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 19:52:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:00,863 INFO L93 Difference]: Finished difference Result 4433 states and 6372 transitions. [2021-08-06 19:52:00,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:52:00,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 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 48 [2021-08-06 19:52:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:00,878 INFO L225 Difference]: With dead ends: 4433 [2021-08-06 19:52:00,879 INFO L226 Difference]: Without dead ends: 4404 [2021-08-06 19:52:00,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:52:00,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-08-06 19:52:00,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 3720. [2021-08-06 19:52:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3720 states, 3719 states have (on average 1.44528098951331) internal successors, (5375), 3719 states have internal predecessors, (5375), 0 states have call successors, (0), 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 19:52:00,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5375 transitions. [2021-08-06 19:52:00,951 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5375 transitions. Word has length 48 [2021-08-06 19:52:00,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:00,952 INFO L470 AbstractCegarLoop]: Abstraction has 3720 states and 5375 transitions. [2021-08-06 19:52:00,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 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 19:52:00,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5375 transitions. [2021-08-06 19:52:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:52:00,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:00,960 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:00,986 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 19:52:01,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:01,173 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:01,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:01,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1191510035, now seen corresponding path program 4 times [2021-08-06 19:52:01,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:01,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692349704] [2021-08-06 19:52:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:01,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:01,304 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:52:01,307 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:52:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:52:01,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:01,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692349704] [2021-08-06 19:52:01,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692349704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:01,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661595029] [2021-08-06 19:52:01,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:52:01,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:01,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:01,320 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 19:52:01,346 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 19:52:01,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:52:01,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:01,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:52:01,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:52:01,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661595029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:01,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:01,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-06 19:52:01,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601079233] [2021-08-06 19:52:01,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:52:01,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:01,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:52:01,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:52:01,959 INFO L87 Difference]: Start difference. First operand 3720 states and 5375 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 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 19:52:02,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:02,064 INFO L93 Difference]: Finished difference Result 5045 states and 7248 transitions. [2021-08-06 19:52:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:52:02,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 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 48 [2021-08-06 19:52:02,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:02,082 INFO L225 Difference]: With dead ends: 5045 [2021-08-06 19:52:02,082 INFO L226 Difference]: Without dead ends: 5016 [2021-08-06 19:52:02,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:52:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5016 states. [2021-08-06 19:52:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5016 to 3970. [2021-08-06 19:52:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3970 states, 3969 states have (on average 1.4310909549004787) internal successors, (5680), 3969 states have internal predecessors, (5680), 0 states have call successors, (0), 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 19:52:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3970 states to 3970 states and 5680 transitions. [2021-08-06 19:52:02,153 INFO L78 Accepts]: Start accepts. Automaton has 3970 states and 5680 transitions. Word has length 48 [2021-08-06 19:52:02,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:02,153 INFO L470 AbstractCegarLoop]: Abstraction has 3970 states and 5680 transitions. [2021-08-06 19:52:02,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 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 19:52:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3970 states and 5680 transitions. [2021-08-06 19:52:02,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:52:02,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:02,162 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:02,185 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 19:52:02,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:02,384 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:02,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:02,384 INFO L82 PathProgramCache]: Analyzing trace with hash -27150821, now seen corresponding path program 5 times [2021-08-06 19:52:02,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:02,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981405440] [2021-08-06 19:52:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:02,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:02,465 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:52:02,466 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:52:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:52:02,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:02,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981405440] [2021-08-06 19:52:02,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981405440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:02,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743303197] [2021-08-06 19:52:02,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:52:02,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:02,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:02,474 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 19:52:02,475 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 19:52:02,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:52:02,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:02,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:52:02,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:52:03,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743303197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:03,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:03,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-06 19:52:03,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334601392] [2021-08-06 19:52:03,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:52:03,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:03,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:52:03,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:52:03,117 INFO L87 Difference]: Start difference. First operand 3970 states and 5680 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 19:52:03,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:03,199 INFO L93 Difference]: Finished difference Result 6458 states and 9318 transitions. [2021-08-06 19:52:03,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:52:03,200 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 48 [2021-08-06 19:52:03,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:03,213 INFO L225 Difference]: With dead ends: 6458 [2021-08-06 19:52:03,213 INFO L226 Difference]: Without dead ends: 6429 [2021-08-06 19:52:03,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:52:03,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6429 states. [2021-08-06 19:52:03,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6429 to 6113. [2021-08-06 19:52:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6113 states, 6112 states have (on average 1.4649869109947644) internal successors, (8954), 6112 states have internal predecessors, (8954), 0 states have call successors, (0), 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 19:52:03,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6113 states to 6113 states and 8954 transitions. [2021-08-06 19:52:03,316 INFO L78 Accepts]: Start accepts. Automaton has 6113 states and 8954 transitions. Word has length 48 [2021-08-06 19:52:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:03,316 INFO L470 AbstractCegarLoop]: Abstraction has 6113 states and 8954 transitions. [2021-08-06 19:52:03,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 19:52:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 6113 states and 8954 transitions. [2021-08-06 19:52:03,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:52:03,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:03,330 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:03,355 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 19:52:03,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-06 19:52:03,555 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:03,556 INFO L82 PathProgramCache]: Analyzing trace with hash 685066569, now seen corresponding path program 6 times [2021-08-06 19:52:03,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:03,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915109052] [2021-08-06 19:52:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:03,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:03,664 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:52:03,677 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:52:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:52:03,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:03,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915109052] [2021-08-06 19:52:03,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915109052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:03,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103761271] [2021-08-06 19:52:03,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:52:03,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:03,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:03,684 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 19:52:03,685 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 19:52:03,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:52:03,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:03,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:52:03,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:52:04,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103761271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:04,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:04,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-06 19:52:04,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058330964] [2021-08-06 19:52:04,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:52:04,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:04,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:52:04,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:52:04,367 INFO L87 Difference]: Start difference. First operand 6113 states and 8954 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 19:52:04,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:04,476 INFO L93 Difference]: Finished difference Result 7938 states and 11551 transitions. [2021-08-06 19:52:04,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:52:04,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 48 [2021-08-06 19:52:04,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:04,492 INFO L225 Difference]: With dead ends: 7938 [2021-08-06 19:52:04,493 INFO L226 Difference]: Without dead ends: 7467 [2021-08-06 19:52:04,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:52:04,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7467 states. [2021-08-06 19:52:04,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7467 to 4470. [2021-08-06 19:52:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4470 states, 4469 states have (on average 1.4074737077646007) internal successors, (6290), 4469 states have internal predecessors, (6290), 0 states have call successors, (0), 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 19:52:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4470 states to 4470 states and 6290 transitions. [2021-08-06 19:52:04,579 INFO L78 Accepts]: Start accepts. Automaton has 4470 states and 6290 transitions. Word has length 48 [2021-08-06 19:52:04,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:04,579 INFO L470 AbstractCegarLoop]: Abstraction has 4470 states and 6290 transitions. [2021-08-06 19:52:04,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 19:52:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 4470 states and 6290 transitions. [2021-08-06 19:52:04,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:52:04,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:04,588 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:04,615 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 19:52:04,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:04,811 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:04,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:04,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1744362855, now seen corresponding path program 7 times [2021-08-06 19:52:04,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:04,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498551086] [2021-08-06 19:52:04,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:04,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:04,902 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:52:04,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:52:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:04,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:04,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498551086] [2021-08-06 19:52:04,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498551086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:04,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142996966] [2021-08-06 19:52:04,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:52:04,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:04,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:04,912 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 19:52:04,913 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 19:52:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:05,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:52:05,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:05,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142996966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:05,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:05,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-06 19:52:05,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234788040] [2021-08-06 19:52:05,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:52:05,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:05,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:52:05,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:52:05,616 INFO L87 Difference]: Start difference. First operand 4470 states and 6290 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 19:52:05,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:05,718 INFO L93 Difference]: Finished difference Result 6984 states and 9844 transitions. [2021-08-06 19:52:05,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:52:05,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 48 [2021-08-06 19:52:05,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:05,731 INFO L225 Difference]: With dead ends: 6984 [2021-08-06 19:52:05,732 INFO L226 Difference]: Without dead ends: 6955 [2021-08-06 19:52:05,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:52:05,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6955 states. [2021-08-06 19:52:05,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6955 to 5439. [2021-08-06 19:52:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5439 states, 5438 states have (on average 1.4106289076866496) internal successors, (7671), 5438 states have internal predecessors, (7671), 0 states have call successors, (0), 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 19:52:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 7671 transitions. [2021-08-06 19:52:05,810 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 7671 transitions. Word has length 48 [2021-08-06 19:52:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:05,811 INFO L470 AbstractCegarLoop]: Abstraction has 5439 states and 7671 transitions. [2021-08-06 19:52:05,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 19:52:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 7671 transitions. [2021-08-06 19:52:05,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:52:05,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:05,821 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:05,844 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 19:52:06,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:06,039 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:06,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:06,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1032145465, now seen corresponding path program 8 times [2021-08-06 19:52:06,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:06,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809584182] [2021-08-06 19:52:06,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:06,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:06,124 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:52:06,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:52:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:52:06,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:06,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809584182] [2021-08-06 19:52:06,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809584182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:06,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339172160] [2021-08-06 19:52:06,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:52:06,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:06,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:06,134 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 19:52:06,162 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 19:52:06,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:52:06,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:06,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:52:06,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:52:06,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339172160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:06,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:06,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-06 19:52:06,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658701808] [2021-08-06 19:52:06,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:52:06,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:06,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:52:06,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:52:06,898 INFO L87 Difference]: Start difference. First operand 5439 states and 7671 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 19:52:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:06,990 INFO L93 Difference]: Finished difference Result 8012 states and 11465 transitions. [2021-08-06 19:52:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:52:06,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 48 [2021-08-06 19:52:06,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:07,006 INFO L225 Difference]: With dead ends: 8012 [2021-08-06 19:52:07,006 INFO L226 Difference]: Without dead ends: 8007 [2021-08-06 19:52:07,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:52:07,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8007 states. [2021-08-06 19:52:07,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8007 to 7519. [2021-08-06 19:52:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7519 states, 7518 states have (on average 1.454243149773876) internal successors, (10933), 7518 states have internal predecessors, (10933), 0 states have call successors, (0), 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 19:52:07,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7519 states to 7519 states and 10933 transitions. [2021-08-06 19:52:07,122 INFO L78 Accepts]: Start accepts. Automaton has 7519 states and 10933 transitions. Word has length 48 [2021-08-06 19:52:07,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:07,123 INFO L470 AbstractCegarLoop]: Abstraction has 7519 states and 10933 transitions. [2021-08-06 19:52:07,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 19:52:07,123 INFO L276 IsEmpty]: Start isEmpty. Operand 7519 states and 10933 transitions. [2021-08-06 19:52:07,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:52:07,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:07,137 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:07,168 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 19:52:07,352 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,SelfDestructingSolverStorable14 [2021-08-06 19:52:07,353 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:07,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:07,353 INFO L82 PathProgramCache]: Analyzing trace with hash 930706585, now seen corresponding path program 9 times [2021-08-06 19:52:07,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:07,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491939706] [2021-08-06 19:52:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:07,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:07,445 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:52:07,446 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:52:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:52:07,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:07,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491939706] [2021-08-06 19:52:07,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491939706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:07,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752452315] [2021-08-06 19:52:07,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:52:07,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:07,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:07,455 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 19:52:07,482 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 19:52:07,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:52:07,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:07,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:52:07,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:52:08,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752452315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:08,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:08,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-06 19:52:08,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184412067] [2021-08-06 19:52:08,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:52:08,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:08,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:52:08,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:52:08,287 INFO L87 Difference]: Start difference. First operand 7519 states and 10933 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 19:52:08,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:08,403 INFO L93 Difference]: Finished difference Result 12865 states and 18827 transitions. [2021-08-06 19:52:08,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:52:08,403 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 48 [2021-08-06 19:52:08,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:08,432 INFO L225 Difference]: With dead ends: 12865 [2021-08-06 19:52:08,432 INFO L226 Difference]: Without dead ends: 12836 [2021-08-06 19:52:08,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:52:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12836 states. [2021-08-06 19:52:08,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12836 to 11794. [2021-08-06 19:52:08,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11794 states, 11793 states have (on average 1.438650046637836) internal successors, (16966), 11793 states have internal predecessors, (16966), 0 states have call successors, (0), 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 19:52:08,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11794 states to 11794 states and 16966 transitions. [2021-08-06 19:52:08,612 INFO L78 Accepts]: Start accepts. Automaton has 11794 states and 16966 transitions. Word has length 48 [2021-08-06 19:52:08,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:08,612 INFO L470 AbstractCegarLoop]: Abstraction has 11794 states and 16966 transitions. [2021-08-06 19:52:08,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 19:52:08,612 INFO L276 IsEmpty]: Start isEmpty. Operand 11794 states and 16966 transitions. [2021-08-06 19:52:08,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:52:08,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:08,635 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:08,663 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 19:52:08,858 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,SelfDestructingSolverStorable15 [2021-08-06 19:52:08,858 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:08,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:08,859 INFO L82 PathProgramCache]: Analyzing trace with hash -573040639, now seen corresponding path program 10 times [2021-08-06 19:52:08,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:08,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017576171] [2021-08-06 19:52:08,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:08,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:08,978 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:52:08,979 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:52:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:52:08,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:08,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017576171] [2021-08-06 19:52:08,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017576171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:08,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638406467] [2021-08-06 19:52:08,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:52:08,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:08,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:08,992 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 19:52:08,992 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 19:52:09,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:52:09,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:09,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:52:09,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:52:09,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638406467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:09,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:09,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-06 19:52:09,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68583844] [2021-08-06 19:52:09,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:52:09,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:09,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:52:09,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:52:09,746 INFO L87 Difference]: Start difference. First operand 11794 states and 16966 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 19:52:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:09,921 INFO L93 Difference]: Finished difference Result 20535 states and 29600 transitions. [2021-08-06 19:52:09,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:52:09,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 48 [2021-08-06 19:52:09,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:09,960 INFO L225 Difference]: With dead ends: 20535 [2021-08-06 19:52:09,960 INFO L226 Difference]: Without dead ends: 19704 [2021-08-06 19:52:09,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:52:09,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19704 states. [2021-08-06 19:52:10,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19704 to 18312. [2021-08-06 19:52:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18312 states, 18311 states have (on average 1.432035388564251) internal successors, (26222), 18311 states have internal predecessors, (26222), 0 states have call successors, (0), 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 19:52:10,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18312 states to 18312 states and 26222 transitions. [2021-08-06 19:52:10,251 INFO L78 Accepts]: Start accepts. Automaton has 18312 states and 26222 transitions. Word has length 48 [2021-08-06 19:52:10,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:10,252 INFO L470 AbstractCegarLoop]: Abstraction has 18312 states and 26222 transitions. [2021-08-06 19:52:10,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 19:52:10,252 INFO L276 IsEmpty]: Start isEmpty. Operand 18312 states and 26222 transitions. [2021-08-06 19:52:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:52:10,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:10,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:10,310 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 19:52:10,504 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,SelfDestructingSolverStorable16 [2021-08-06 19:52:10,505 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:10,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:10,505 INFO L82 PathProgramCache]: Analyzing trace with hash 195591039, now seen corresponding path program 11 times [2021-08-06 19:52:10,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:10,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410170401] [2021-08-06 19:52:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:10,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:10,590 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:52:10,591 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:52:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:10,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:10,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410170401] [2021-08-06 19:52:10,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410170401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:10,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140105182] [2021-08-06 19:52:10,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:52:10,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:10,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:10,600 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 19:52:10,601 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 19:52:11,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:52:11,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:52:11,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:52:11,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:11,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140105182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:11,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:11,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-06 19:52:11,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329061232] [2021-08-06 19:52:11,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:52:11,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:11,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:52:11,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:52:11,464 INFO L87 Difference]: Start difference. First operand 18312 states and 26222 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 19:52:11,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:11,674 INFO L93 Difference]: Finished difference Result 29914 states and 42551 transitions. [2021-08-06 19:52:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:52:11,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 48 [2021-08-06 19:52:11,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:11,720 INFO L225 Difference]: With dead ends: 29914 [2021-08-06 19:52:11,720 INFO L226 Difference]: Without dead ends: 29111 [2021-08-06 19:52:11,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:52:11,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29111 states. [2021-08-06 19:52:12,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29111 to 28260. [2021-08-06 19:52:12,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28260 states, 28259 states have (on average 1.429031459004211) internal successors, (40383), 28259 states have internal predecessors, (40383), 0 states have call successors, (0), 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 19:52:12,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28260 states to 28260 states and 40383 transitions. [2021-08-06 19:52:12,142 INFO L78 Accepts]: Start accepts. Automaton has 28260 states and 40383 transitions. Word has length 48 [2021-08-06 19:52:12,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:12,142 INFO L470 AbstractCegarLoop]: Abstraction has 28260 states and 40383 transitions. [2021-08-06 19:52:12,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 19:52:12,143 INFO L276 IsEmpty]: Start isEmpty. Operand 28260 states and 40383 transitions. [2021-08-06 19:52:12,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-06 19:52:12,292 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:12,292 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:12,316 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 19:52:12,506 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,SelfDestructingSolverStorable17 [2021-08-06 19:52:12,506 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:12,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:12,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1463799038, now seen corresponding path program 12 times [2021-08-06 19:52:12,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:12,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494364860] [2021-08-06 19:52:12,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:12,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 19:52:12,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:12,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494364860] [2021-08-06 19:52:12,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494364860] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:52:12,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:52:12,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:52:12,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681764450] [2021-08-06 19:52:12,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:52:12,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:12,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:52:12,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:52:12,524 INFO L87 Difference]: Start difference. First operand 28260 states and 40383 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:12,706 INFO L93 Difference]: Finished difference Result 30630 states and 43533 transitions. [2021-08-06 19:52:12,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:52:12,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-06 19:52:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:12,761 INFO L225 Difference]: With dead ends: 30630 [2021-08-06 19:52:12,761 INFO L226 Difference]: Without dead ends: 28260 [2021-08-06 19:52:12,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:52:12,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28260 states. [2021-08-06 19:52:13,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28260 to 28245. [2021-08-06 19:52:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28245 states, 28244 states have (on average 1.4230987112307039) internal successors, (40194), 28244 states have internal predecessors, (40194), 0 states have call successors, (0), 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 19:52:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28245 states to 28245 states and 40194 transitions. [2021-08-06 19:52:13,328 INFO L78 Accepts]: Start accepts. Automaton has 28245 states and 40194 transitions. Word has length 59 [2021-08-06 19:52:13,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:13,328 INFO L470 AbstractCegarLoop]: Abstraction has 28245 states and 40194 transitions. [2021-08-06 19:52:13,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:52:13,334 INFO L276 IsEmpty]: Start isEmpty. Operand 28245 states and 40194 transitions. [2021-08-06 19:52:13,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-06 19:52:13,385 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:52:13,385 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:52:13,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-06 19:52:13,386 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:52:13,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:52:13,389 INFO L82 PathProgramCache]: Analyzing trace with hash 860228801, now seen corresponding path program 1 times [2021-08-06 19:52:13,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:52:13,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944788458] [2021-08-06 19:52:13,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:13,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:52:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:13,507 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:52:13,508 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:52:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:13,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:52:13,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944788458] [2021-08-06 19:52:13,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944788458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:13,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070064261] [2021-08-06 19:52:13,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:52:13,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:13,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:52:13,518 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 19:52:13,519 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 19:52:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:52:14,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 19:52:14,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:52:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:52:14,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070064261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:52:14,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:52:14,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-06 19:52:14,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503662019] [2021-08-06 19:52:14,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:52:14,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:52:14,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:52:14,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:52:14,544 INFO L87 Difference]: Start difference. First operand 28245 states and 40194 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 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 19:52:14,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:52:14,698 INFO L93 Difference]: Finished difference Result 28243 states and 40192 transitions. [2021-08-06 19:52:14,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:52:14,699 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-08-06 19:52:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:52:14,699 INFO L225 Difference]: With dead ends: 28243 [2021-08-06 19:52:14,699 INFO L226 Difference]: Without dead ends: 0 [2021-08-06 19:52:14,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:52:14,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-06 19:52:14,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-06 19:52:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 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 19:52:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-06 19:52:14,700 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2021-08-06 19:52:14,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:52:14,700 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-06 19:52:14,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 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 19:52:14,700 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-06 19:52:14,700 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 19:52:14,702 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 19:52:14,702 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 19:52:14,702 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 19:52:14,702 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 19:52:14,719 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 19:52:14,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:52:14,906 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 19:52:14,906 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 19:52:14,908 INFO L202 PluginConnector]: Adding new model misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 07:52:14 BasicIcfg [2021-08-06 19:52:14,908 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 19:52:14,909 INFO L168 Benchmark]: Toolchain (without parser) took 19107.58 ms. Allocated memory was 199.2 MB in the beginning and 1.1 GB in the end (delta: 926.9 MB). Free memory was 180.0 MB in the beginning and 803.5 MB in the end (delta: -623.6 MB). Peak memory consumption was 304.0 MB. Max. memory is 8.0 GB. [2021-08-06 19:52:14,909 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 199.2 MB. Free memory is still 181.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 19:52:14,909 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.83 ms. Allocated memory is still 199.2 MB. Free memory was 179.8 MB in the beginning and 178.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 19:52:14,909 INFO L168 Benchmark]: Boogie Preprocessor took 21.03 ms. Allocated memory is still 199.2 MB. Free memory was 178.4 MB in the beginning and 177.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 19:52:14,909 INFO L168 Benchmark]: RCFGBuilder took 252.94 ms. Allocated memory is still 199.2 MB. Free memory was 177.4 MB in the beginning and 164.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-06 19:52:14,909 INFO L168 Benchmark]: TraceAbstraction took 18801.59 ms. Allocated memory was 199.2 MB in the beginning and 1.1 GB in the end (delta: 926.9 MB). Free memory was 163.6 MB in the beginning and 803.5 MB in the end (delta: -639.9 MB). Peak memory consumption was 287.2 MB. Max. memory is 8.0 GB. [2021-08-06 19:52:14,909 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 199.2 MB. Free memory is still 181.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.83 ms. Allocated memory is still 199.2 MB. Free memory was 179.8 MB in the beginning and 178.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.03 ms. Allocated memory is still 199.2 MB. Free memory was 178.4 MB in the beginning and 177.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 252.94 ms. Allocated memory is still 199.2 MB. Free memory was 177.4 MB in the beginning and 164.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18801.59 ms. Allocated memory was 199.2 MB in the beginning and 1.1 GB in the end (delta: 926.9 MB). Free memory was 163.6 MB in the beginning and 803.5 MB in the end (delta: -639.9 MB). Peak memory consumption was 287.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 3648, positive: 3240, positive conditional: 3240, positive unconditional: 0, negative: 408, negative conditional: 408, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 3240, positive: 3240, positive conditional: 0, positive unconditional: 3240, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 504, positive: 504, positive conditional: 0, positive unconditional: 504, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 504, positive: 492, positive conditional: 0, positive unconditional: 492, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 12, positive: 12, positive conditional: 0, positive unconditional: 12, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 52, positive: 52, positive conditional: 0, positive unconditional: 52, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3240, positive: 2736, positive conditional: 0, positive unconditional: 2736, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 504, unknown conditional: 0, unknown unconditional: 504] , Statistics on independence cache: Total cache size (in pairs): 504, Positive cache size: 504, Positive conditional cache size: 0, Positive unconditional cache size: 504, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 408 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 100]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 69 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 18721.6ms, OverallIterations: 20, TraceHistogramMax: 4, EmptinessCheckTime: 389.8ms, AutomataDifference: 2114.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 349.8ms, PartialOrderReductionTime: 336.8ms, HoareTripleCheckerStatistics: 1824 SDtfs, 1093 SDslu, 6845 SDs, 0 SdLazy, 1559 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 736.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 693 GetRequests, 592 SyntacticMatches, 24 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 531.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28260occurred in iteration=18, InterpolantAutomatonStates: 117, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2378.4ms AutomataMinimizationTime, 20 MinimizatonAttempts, 11904 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 79.5ms SsaConstructionTime, 290.2ms SatisfiabilityAnalysisTime, 7448.8ms InterpolantComputationTime, 1446 NumberOfCodeBlocks, 1446 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 1414 ConstructedInterpolants, 0 QuantifiedInterpolants, 8181 SizeOfPredicates, 12 NumberOfNonLiveVariables, 985 ConjunctsInSsa, 184 ConjunctsInUnsatCore, 32 InterpolantComputations, 8 PerfectInterpolantSequences, 118/568 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-06 19:52:14,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...