/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 14:22:03,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 14:22:03,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 14:22:03,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 14:22:03,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 14:22:03,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 14:22:03,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 14:22:03,913 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-06 14:22:03,931 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 14:22:03,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 14:22:03,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 14:22:03,932 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 14:22:03,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 14:22:03,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 14:22:03,933 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 14:22:03,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 14:22:03,933 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 14:22:03,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 14:22:03,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 14:22:03,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 14:22:03,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 14:22:03,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 14:22:03,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 14:22:03,934 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 14:22:03,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 14:22:03,934 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 14:22:03,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 14:22:03,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 14:22:03,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 14:22:03,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 14:22:03,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 14:22:03,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:22:03,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 14:22:03,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 14:22:03,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 14:22:03,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 14:22:03,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 14:22:03,935 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 14:22:03,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 14:22:03,935 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 14:22:04,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 14:22:04,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 14:22:04,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 14:22:04,204 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 14:22:04,205 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 14:22:04,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl [2021-08-06 14:22:04,206 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl' [2021-08-06 14:22:04,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 14:22:04,238 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 14:22:04,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 14:22:04,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 14:22:04,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 14:22:04,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:22:04" (1/1) ... [2021-08-06 14:22:04,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:22:04" (1/1) ... [2021-08-06 14:22:04,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 14:22:04,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 14:22:04,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 14:22:04,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 14:22:04,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:22:04" (1/1) ... [2021-08-06 14:22:04,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:22:04" (1/1) ... [2021-08-06 14:22:04,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:22:04" (1/1) ... [2021-08-06 14:22:04,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:22:04" (1/1) ... [2021-08-06 14:22:04,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:22:04" (1/1) ... [2021-08-06 14:22:04,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:22:04" (1/1) ... [2021-08-06 14:22:04,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:22:04" (1/1) ... [2021-08-06 14:22:04,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 14:22:04,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 14:22:04,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 14:22:04,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 14:22:04,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:22:04" (1/1) ... [2021-08-06 14:22:04,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:22:04,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:04,313 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 14:22:04,333 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 14:22:04,343 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 14:22:04,344 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 14:22:04,344 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 14:22:04,344 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 14:22:04,344 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 14:22:04,344 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 14:22:04,344 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 14:22:04,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 14:22:04,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 14:22:04,345 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 14:22:04,346 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 14:22:04,346 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 14:22:04,346 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-06 14:22:04,346 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-06 14:22:04,347 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-06 14:22:04,347 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-08-06 14:22:04,347 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-08-06 14:22:04,347 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-08-06 14:22:04,348 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-08-06 14:22:04,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-08-06 14:22:04,348 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-08-06 14:22:04,351 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 14:22:04,487 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 14:22:04,487 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-06 14:22:04,488 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-06 14:22:04,488 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-06 14:22:04,488 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-08-06 14:22:04,488 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-08-06 14:22:04,489 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-08-06 14:22:04,489 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-08-06 14:22:04,490 INFO L202 PluginConnector]: Adding new model exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:22:04 BoogieIcfgContainer [2021-08-06 14:22:04,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 14:22:04,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 14:22:04,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 14:22:04,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 14:22:04,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:22:04" (1/2) ... [2021-08-06 14:22:04,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58eb60a4 and model type exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 02:22:04, skipping insertion in model container [2021-08-06 14:22:04,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:22:04" (2/2) ... [2021-08-06 14:22:04,506 INFO L111 eAbstractionObserver]: Analyzing ICFG exp3x3-opt.wvr.bpl [2021-08-06 14:22:04,509 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 14:22:04,509 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 14:22:04,509 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 14:22:04,509 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 14:22:04,594 INFO L148 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-08-06 14:22:04,622 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 14:22:04,626 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 14:22:04,626 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-06 14:22:04,633 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 35 transitions, 118 flow [2021-08-06 14:22:04,667 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 193 states, 192 states have (on average 5.359375) internal successors, (1029), 192 states have internal predecessors, (1029), 0 states have call successors, (0), 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 14:22:04,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 192 states have (on average 5.359375) internal successors, (1029), 192 states have internal predecessors, (1029), 0 states have call successors, (0), 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 14:22:04,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:22:04,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:04,682 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 14:22:04,682 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:04,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:04,686 INFO L82 PathProgramCache]: Analyzing trace with hash -931305045, now seen corresponding path program 1 times [2021-08-06 14:22:04,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:04,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327729481] [2021-08-06 14:22:04,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:04,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:04,805 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 14:22:04,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:04,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327729481] [2021-08-06 14:22:04,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327729481] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:22:04,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:22:04,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 14:22:04,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11906941] [2021-08-06 14:22:04,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 14:22:04,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:04,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 14:22:04,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:22:04,826 INFO L87 Difference]: Start difference. First operand has 193 states, 192 states have (on average 5.359375) internal successors, (1029), 192 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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 14:22:04,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:04,870 INFO L93 Difference]: Finished difference Result 352 states and 1926 transitions. [2021-08-06 14:22:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 14:22:04,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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 14:22:04,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:04,889 INFO L225 Difference]: With dead ends: 352 [2021-08-06 14:22:04,890 INFO L226 Difference]: Without dead ends: 319 [2021-08-06 14:22:04,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:22:04,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-08-06 14:22:04,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2021-08-06 14:22:04,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 5.49685534591195) internal successors, (1748), 318 states have internal predecessors, (1748), 0 states have call successors, (0), 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 14:22:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 1748 transitions. [2021-08-06 14:22:04,981 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 1748 transitions. Word has length 21 [2021-08-06 14:22:04,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:04,982 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 1748 transitions. [2021-08-06 14:22:04,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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 14:22:04,983 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 1748 transitions. [2021-08-06 14:22:04,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:04,990 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:04,990 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:04,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 14:22:04,991 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:04,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:04,993 INFO L82 PathProgramCache]: Analyzing trace with hash -976021450, now seen corresponding path program 1 times [2021-08-06 14:22:04,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:04,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663774809] [2021-08-06 14:22:04,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:04,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:22:05,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:05,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663774809] [2021-08-06 14:22:05,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663774809] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:22:05,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:22:05,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 14:22:05,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535529351] [2021-08-06 14:22:05,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 14:22:05,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:05,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 14:22:05,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:22:05,068 INFO L87 Difference]: Start difference. First operand 319 states and 1748 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:05,085 INFO L93 Difference]: Finished difference Result 628 states and 3476 transitions. [2021-08-06 14:22:05,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 14:22:05,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 14:22:05,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:05,091 INFO L225 Difference]: With dead ends: 628 [2021-08-06 14:22:05,092 INFO L226 Difference]: Without dead ends: 541 [2021-08-06 14:22:05,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:22:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-08-06 14:22:05,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-08-06 14:22:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 5.587037037037037) internal successors, (3017), 540 states have internal predecessors, (3017), 0 states have call successors, (0), 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 14:22:05,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 3017 transitions. [2021-08-06 14:22:05,126 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 3017 transitions. Word has length 22 [2021-08-06 14:22:05,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:05,127 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 3017 transitions. [2021-08-06 14:22:05,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:05,127 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 3017 transitions. [2021-08-06 14:22:05,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:22:05,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:05,129 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:05,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 14:22:05,130 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:05,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:05,131 INFO L82 PathProgramCache]: Analyzing trace with hash 93496637, now seen corresponding path program 1 times [2021-08-06 14:22:05,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:05,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121229368] [2021-08-06 14:22:05,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:05,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:22:05,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:05,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121229368] [2021-08-06 14:22:05,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121229368] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:22:05,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:22:05,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 14:22:05,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570517094] [2021-08-06 14:22:05,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 14:22:05,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:05,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 14:22:05,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:22:05,185 INFO L87 Difference]: Start difference. First operand 541 states and 3017 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:05,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:05,200 INFO L93 Difference]: Finished difference Result 1078 states and 6030 transitions. [2021-08-06 14:22:05,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 14:22:05,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:22:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:05,208 INFO L225 Difference]: With dead ends: 1078 [2021-08-06 14:22:05,208 INFO L226 Difference]: Without dead ends: 859 [2021-08-06 14:22:05,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:22:05,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-08-06 14:22:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2021-08-06 14:22:05,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 5.6678321678321675) internal successors, (4863), 858 states have internal predecessors, (4863), 0 states have call successors, (0), 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 14:22:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 4863 transitions. [2021-08-06 14:22:05,233 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 4863 transitions. Word has length 23 [2021-08-06 14:22:05,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:05,233 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 4863 transitions. [2021-08-06 14:22:05,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:05,234 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 4863 transitions. [2021-08-06 14:22:05,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:22:05,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:05,237 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:05,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 14:22:05,238 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:05,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:05,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1806147054, now seen corresponding path program 1 times [2021-08-06 14:22:05,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:05,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594206467] [2021-08-06 14:22:05,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:05,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:22:05,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:05,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594206467] [2021-08-06 14:22:05,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594206467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:05,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320804559] [2021-08-06 14:22:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:05,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:05,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:05,289 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 14:22:05,290 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 14:22:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:05,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 14:22:05,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:22:05,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320804559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:05,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:05,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-08-06 14:22:05,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680412342] [2021-08-06 14:22:05,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:22:05,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:05,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:22:05,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:22:05,582 INFO L87 Difference]: Start difference. First operand 859 states and 4863 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 14:22:05,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:05,711 INFO L93 Difference]: Finished difference Result 1936 states and 10970 transitions. [2021-08-06 14:22:05,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:22:05,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 24 [2021-08-06 14:22:05,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:05,719 INFO L225 Difference]: With dead ends: 1936 [2021-08-06 14:22:05,719 INFO L226 Difference]: Without dead ends: 922 [2021-08-06 14:22:05,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:22:05,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-08-06 14:22:05,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 610. [2021-08-06 14:22:05,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 5.600985221674877) internal successors, (3411), 609 states have internal predecessors, (3411), 0 states have call successors, (0), 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 14:22:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 3411 transitions. [2021-08-06 14:22:05,738 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 3411 transitions. Word has length 24 [2021-08-06 14:22:05,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:05,740 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 3411 transitions. [2021-08-06 14:22:05,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 14:22:05,741 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 3411 transitions. [2021-08-06 14:22:05,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:22:05,743 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:05,743 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:05,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:05,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:05,962 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:05,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:05,963 INFO L82 PathProgramCache]: Analyzing trace with hash 860655352, now seen corresponding path program 1 times [2021-08-06 14:22:05,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:05,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547997180] [2021-08-06 14:22:05,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:05,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:22:05,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:05,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547997180] [2021-08-06 14:22:05,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547997180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:05,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843112173] [2021-08-06 14:22:05,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:05,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:05,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:05,991 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 14:22:06,010 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 14:22:06,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:06,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 14:22:06,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:22:06,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843112173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:06,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:06,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-08-06 14:22:06,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408263491] [2021-08-06 14:22:06,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:22:06,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:06,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:22:06,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:22:06,234 INFO L87 Difference]: Start difference. First operand 610 states and 3411 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 14:22:06,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:06,333 INFO L93 Difference]: Finished difference Result 2023 states and 11454 transitions. [2021-08-06 14:22:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:22:06,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 24 [2021-08-06 14:22:06,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:06,342 INFO L225 Difference]: With dead ends: 2023 [2021-08-06 14:22:06,343 INFO L226 Difference]: Without dead ends: 1163 [2021-08-06 14:22:06,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:22:06,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-08-06 14:22:06,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1163. [2021-08-06 14:22:06,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 5.699655765920826) internal successors, (6623), 1162 states have internal predecessors, (6623), 0 states have call successors, (0), 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 14:22:06,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 6623 transitions. [2021-08-06 14:22:06,380 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 6623 transitions. Word has length 24 [2021-08-06 14:22:06,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:06,380 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 6623 transitions. [2021-08-06 14:22:06,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 14:22:06,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 6623 transitions. [2021-08-06 14:22:06,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:22:06,384 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:06,384 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:06,401 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 14:22:06,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:06,601 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:06,601 INFO L82 PathProgramCache]: Analyzing trace with hash -103790194, now seen corresponding path program 1 times [2021-08-06 14:22:06,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:06,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522571745] [2021-08-06 14:22:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:06,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:06,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:06,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:06,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522571745] [2021-08-06 14:22:06,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522571745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:06,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412320996] [2021-08-06 14:22:06,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:06,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:06,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:06,652 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 14:22:06,658 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 14:22:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:06,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 14:22:06,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:06,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412320996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:06,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:06,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-08-06 14:22:06,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207944485] [2021-08-06 14:22:06,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:22:06,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:06,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:22:06,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:22:06,876 INFO L87 Difference]: Start difference. First operand 1163 states and 6623 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 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 14:22:06,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:06,914 INFO L93 Difference]: Finished difference Result 1806 states and 10329 transitions. [2021-08-06 14:22:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:22:06,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 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 26 [2021-08-06 14:22:06,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:06,923 INFO L225 Difference]: With dead ends: 1806 [2021-08-06 14:22:06,923 INFO L226 Difference]: Without dead ends: 1298 [2021-08-06 14:22:06,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:22:06,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-08-06 14:22:06,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 992. [2021-08-06 14:22:06,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 5.702320887991927) internal successors, (5651), 991 states have internal predecessors, (5651), 0 states have call successors, (0), 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 14:22:06,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 5651 transitions. [2021-08-06 14:22:06,954 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 5651 transitions. Word has length 26 [2021-08-06 14:22:06,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:06,954 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 5651 transitions. [2021-08-06 14:22:06,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 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 14:22:06,955 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 5651 transitions. [2021-08-06 14:22:06,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:22:06,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:06,958 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:06,976 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 14:22:07,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:07,177 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:07,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:07,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1915665608, now seen corresponding path program 1 times [2021-08-06 14:22:07,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:07,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772947528] [2021-08-06 14:22:07,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:07,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:07,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:07,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772947528] [2021-08-06 14:22:07,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772947528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:07,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754578057] [2021-08-06 14:22:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:07,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:07,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:07,204 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 14:22:07,207 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 14:22:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:07,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 14:22:07,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:07,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754578057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:07,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:07,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-08-06 14:22:07,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125190833] [2021-08-06 14:22:07,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:22:07,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:07,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:22:07,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:22:07,413 INFO L87 Difference]: Start difference. First operand 992 states and 5651 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:07,451 INFO L93 Difference]: Finished difference Result 1941 states and 11157 transitions. [2021-08-06 14:22:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:22:07,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:22:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:07,461 INFO L225 Difference]: With dead ends: 1941 [2021-08-06 14:22:07,461 INFO L226 Difference]: Without dead ends: 1460 [2021-08-06 14:22:07,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:22:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-08-06 14:22:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1460. [2021-08-06 14:22:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 5.748457847840987) internal successors, (8387), 1459 states have internal predecessors, (8387), 0 states have call successors, (0), 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 14:22:07,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 8387 transitions. [2021-08-06 14:22:07,499 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 8387 transitions. Word has length 26 [2021-08-06 14:22:07,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:07,499 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 8387 transitions. [2021-08-06 14:22:07,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:07,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 8387 transitions. [2021-08-06 14:22:07,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:22:07,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:07,503 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:07,532 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 14:22:07,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:07,720 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:07,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:07,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1029298811, now seen corresponding path program 1 times [2021-08-06 14:22:07,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:07,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33056303] [2021-08-06 14:22:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:07,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:07,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:07,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33056303] [2021-08-06 14:22:07,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33056303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:07,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288146054] [2021-08-06 14:22:07,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:07,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:07,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:07,779 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 14:22:07,784 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 14:22:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:07,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:22:07,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:08,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288146054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:08,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:08,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-08-06 14:22:08,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842679234] [2021-08-06 14:22:08,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:22:08,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:08,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:22:08,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:22:08,168 INFO L87 Difference]: Start difference. First operand 1460 states and 8387 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:08,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:08,316 INFO L93 Difference]: Finished difference Result 6508 states and 37469 transitions. [2021-08-06 14:22:08,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:22:08,316 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:22:08,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:08,349 INFO L225 Difference]: With dead ends: 6508 [2021-08-06 14:22:08,349 INFO L226 Difference]: Without dead ends: 5595 [2021-08-06 14:22:08,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:22:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5595 states. [2021-08-06 14:22:08,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5595 to 3403. [2021-08-06 14:22:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3403 states, 3402 states have (on average 6.304526748971194) internal successors, (21448), 3402 states have internal predecessors, (21448), 0 states have call successors, (0), 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 14:22:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3403 states to 3403 states and 21448 transitions. [2021-08-06 14:22:08,504 INFO L78 Accepts]: Start accepts. Automaton has 3403 states and 21448 transitions. Word has length 27 [2021-08-06 14:22:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:08,505 INFO L470 AbstractCegarLoop]: Abstraction has 3403 states and 21448 transitions. [2021-08-06 14:22:08,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3403 states and 21448 transitions. [2021-08-06 14:22:08,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:22:08,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:08,516 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:08,534 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 14:22:08,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:08,727 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:08,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:08,728 INFO L82 PathProgramCache]: Analyzing trace with hash 460516603, now seen corresponding path program 2 times [2021-08-06 14:22:08,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:08,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844707941] [2021-08-06 14:22:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:08,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:22:08,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:08,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844707941] [2021-08-06 14:22:08,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844707941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:08,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746284259] [2021-08-06 14:22:08,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:22:08,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:08,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:08,769 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 14:22:08,793 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 14:22:08,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:22:08,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:08,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:22:08,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:09,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746284259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:09,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:09,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-08-06 14:22:09,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382245285] [2021-08-06 14:22:09,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:22:09,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:09,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:22:09,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:22:09,127 INFO L87 Difference]: Start difference. First operand 3403 states and 21448 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:09,325 INFO L93 Difference]: Finished difference Result 11115 states and 69290 transitions. [2021-08-06 14:22:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:22:09,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:22:09,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:09,376 INFO L225 Difference]: With dead ends: 11115 [2021-08-06 14:22:09,376 INFO L226 Difference]: Without dead ends: 10118 [2021-08-06 14:22:09,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:22:09,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10118 states. [2021-08-06 14:22:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10118 to 6709. [2021-08-06 14:22:09,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6709 states, 6708 states have (on average 6.731067382230173) internal successors, (45152), 6708 states have internal predecessors, (45152), 0 states have call successors, (0), 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 14:22:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 45152 transitions. [2021-08-06 14:22:09,778 INFO L78 Accepts]: Start accepts. Automaton has 6709 states and 45152 transitions. Word has length 27 [2021-08-06 14:22:09,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:09,778 INFO L470 AbstractCegarLoop]: Abstraction has 6709 states and 45152 transitions. [2021-08-06 14:22:09,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:09,778 INFO L276 IsEmpty]: Start isEmpty. Operand 6709 states and 45152 transitions. [2021-08-06 14:22:09,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 14:22:09,801 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:09,801 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:09,820 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 14:22:10,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:10,017 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:10,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:10,017 INFO L82 PathProgramCache]: Analyzing trace with hash -90777990, now seen corresponding path program 3 times [2021-08-06 14:22:10,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:10,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542956976] [2021-08-06 14:22:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:10,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:10,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:10,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542956976] [2021-08-06 14:22:10,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542956976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:10,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998100663] [2021-08-06 14:22:10,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:22:10,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:10,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:10,053 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 14:22:10,053 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 14:22:10,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:22:10,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:10,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 14:22:10,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:10,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998100663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:10,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:10,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 14:22:10,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238047722] [2021-08-06 14:22:10,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:22:10,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:10,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:22:10,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:22:10,412 INFO L87 Difference]: Start difference. First operand 6709 states and 45152 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:10,550 INFO L93 Difference]: Finished difference Result 9291 states and 60293 transitions. [2021-08-06 14:22:10,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:22:10,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 14:22:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:10,630 INFO L225 Difference]: With dead ends: 9291 [2021-08-06 14:22:10,631 INFO L226 Difference]: Without dead ends: 7946 [2021-08-06 14:22:10,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:22:10,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7946 states. [2021-08-06 14:22:10,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7946 to 6226. [2021-08-06 14:22:10,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6225 states have (on average 6.658473895582329) internal successors, (41449), 6225 states have internal predecessors, (41449), 0 states have call successors, (0), 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 14:22:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 41449 transitions. [2021-08-06 14:22:10,872 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 41449 transitions. Word has length 28 [2021-08-06 14:22:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:10,873 INFO L470 AbstractCegarLoop]: Abstraction has 6226 states and 41449 transitions. [2021-08-06 14:22:10,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:10,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 41449 transitions. [2021-08-06 14:22:10,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 14:22:10,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:10,893 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:10,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-06 14:22:11,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:11,110 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:11,111 INFO L82 PathProgramCache]: Analyzing trace with hash 292327756, now seen corresponding path program 4 times [2021-08-06 14:22:11,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:11,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040326298] [2021-08-06 14:22:11,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:11,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:11,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:11,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040326298] [2021-08-06 14:22:11,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040326298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:11,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835592275] [2021-08-06 14:22:11,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:22:11,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:11,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:11,159 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 14:22:11,163 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 14:22:11,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:22:11,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:11,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 14:22:11,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:11,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835592275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:11,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:11,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 14:22:11,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841796695] [2021-08-06 14:22:11,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:22:11,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:11,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:22:11,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:22:11,505 INFO L87 Difference]: Start difference. First operand 6226 states and 41449 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 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 14:22:11,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:11,686 INFO L93 Difference]: Finished difference Result 9667 states and 62399 transitions. [2021-08-06 14:22:11,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:22:11,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 14:22:11,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:11,719 INFO L225 Difference]: With dead ends: 9667 [2021-08-06 14:22:11,720 INFO L226 Difference]: Without dead ends: 7372 [2021-08-06 14:22:11,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:22:11,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7372 states. [2021-08-06 14:22:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7372 to 6226. [2021-08-06 14:22:11,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6225 states have (on average 6.566586345381526) internal successors, (40877), 6225 states have internal predecessors, (40877), 0 states have call successors, (0), 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 14:22:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 40877 transitions. [2021-08-06 14:22:11,906 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 40877 transitions. Word has length 28 [2021-08-06 14:22:11,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:11,906 INFO L470 AbstractCegarLoop]: Abstraction has 6226 states and 40877 transitions. [2021-08-06 14:22:11,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 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 14:22:11,906 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 40877 transitions. [2021-08-06 14:22:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 14:22:11,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:11,925 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:11,944 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 14:22:12,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-06 14:22:12,130 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:12,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:12,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1127701574, now seen corresponding path program 5 times [2021-08-06 14:22:12,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:12,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827126948] [2021-08-06 14:22:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:12,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:12,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:12,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827126948] [2021-08-06 14:22:12,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827126948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:12,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660553222] [2021-08-06 14:22:12,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:22:12,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:12,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:12,181 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 14:22:12,216 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 14:22:12,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:22:12,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:12,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 14:22:12,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:12,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660553222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:12,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:12,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 14:22:12,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907119431] [2021-08-06 14:22:12,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:22:12,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:12,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:22:12,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:22:12,546 INFO L87 Difference]: Start difference. First operand 6226 states and 40877 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:12,686 INFO L93 Difference]: Finished difference Result 9093 states and 58145 transitions. [2021-08-06 14:22:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:22:12,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 14:22:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:12,717 INFO L225 Difference]: With dead ends: 9093 [2021-08-06 14:22:12,717 INFO L226 Difference]: Without dead ends: 7656 [2021-08-06 14:22:12,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:22:12,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7656 states. [2021-08-06 14:22:12,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7656 to 5654. [2021-08-06 14:22:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5654 states, 5653 states have (on average 6.428268176189634) internal successors, (36339), 5653 states have internal predecessors, (36339), 0 states have call successors, (0), 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 14:22:12,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 36339 transitions. [2021-08-06 14:22:12,972 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 36339 transitions. Word has length 28 [2021-08-06 14:22:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:12,972 INFO L470 AbstractCegarLoop]: Abstraction has 5654 states and 36339 transitions. [2021-08-06 14:22:12,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:12,972 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 36339 transitions. [2021-08-06 14:22:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 14:22:12,988 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:12,989 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:13,010 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 14:22:13,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:13,203 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:13,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1808352738, now seen corresponding path program 6 times [2021-08-06 14:22:13,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:13,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132818885] [2021-08-06 14:22:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:13,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:13,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:13,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132818885] [2021-08-06 14:22:13,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132818885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:13,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979466756] [2021-08-06 14:22:13,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:22:13,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:13,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:13,246 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 14:22:13,247 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 14:22:13,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:22:13,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:13,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 14:22:13,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:13,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979466756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:13,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:13,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 14:22:13,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111484255] [2021-08-06 14:22:13,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:22:13,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:13,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:22:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:22:13,567 INFO L87 Difference]: Start difference. First operand 5654 states and 36339 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:13,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:13,701 INFO L93 Difference]: Finished difference Result 7946 states and 50780 transitions. [2021-08-06 14:22:13,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:22:13,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 14:22:13,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:13,782 INFO L225 Difference]: With dead ends: 7946 [2021-08-06 14:22:13,782 INFO L226 Difference]: Without dead ends: 6800 [2021-08-06 14:22:13,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:22:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6800 states. [2021-08-06 14:22:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6800 to 5368. [2021-08-06 14:22:13,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5367 states have (on average 6.374697223774921) internal successors, (34213), 5367 states have internal predecessors, (34213), 0 states have call successors, (0), 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 14:22:13,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 34213 transitions. [2021-08-06 14:22:13,924 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 34213 transitions. Word has length 28 [2021-08-06 14:22:13,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:13,924 INFO L470 AbstractCegarLoop]: Abstraction has 5368 states and 34213 transitions. [2021-08-06 14:22:13,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 34213 transitions. [2021-08-06 14:22:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 14:22:13,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:13,939 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:13,957 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 14:22:14,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 14:22:14,153 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:14,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:14,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1475497308, now seen corresponding path program 7 times [2021-08-06 14:22:14,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:14,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946972345] [2021-08-06 14:22:14,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:14,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:14,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:14,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946972345] [2021-08-06 14:22:14,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946972345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:14,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094123739] [2021-08-06 14:22:14,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:22:14,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:14,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:14,194 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 14:22:14,195 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 14:22:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:14,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 14:22:14,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:14,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094123739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:14,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:14,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 14:22:14,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750298001] [2021-08-06 14:22:14,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:22:14,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:14,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:22:14,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:22:14,475 INFO L87 Difference]: Start difference. First operand 5368 states and 34213 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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 14:22:14,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:14,649 INFO L93 Difference]: Finished difference Result 7087 states and 45258 transitions. [2021-08-06 14:22:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:22:14,649 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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 28 [2021-08-06 14:22:14,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:14,674 INFO L225 Difference]: With dead ends: 7087 [2021-08-06 14:22:14,674 INFO L226 Difference]: Without dead ends: 6512 [2021-08-06 14:22:14,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:22:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6512 states. [2021-08-06 14:22:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6512 to 5940. [2021-08-06 14:22:14,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5940 states, 5939 states have (on average 6.380367065162485) internal successors, (37893), 5939 states have internal predecessors, (37893), 0 states have call successors, (0), 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 14:22:14,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5940 states to 5940 states and 37893 transitions. [2021-08-06 14:22:14,830 INFO L78 Accepts]: Start accepts. Automaton has 5940 states and 37893 transitions. Word has length 28 [2021-08-06 14:22:14,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:14,830 INFO L470 AbstractCegarLoop]: Abstraction has 5940 states and 37893 transitions. [2021-08-06 14:22:14,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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 14:22:14,830 INFO L276 IsEmpty]: Start isEmpty. Operand 5940 states and 37893 transitions. [2021-08-06 14:22:14,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:22:14,846 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:14,846 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] [2021-08-06 14:22:14,866 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 14:22:15,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 14:22:15,063 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:15,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:15,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1880877169, now seen corresponding path program 8 times [2021-08-06 14:22:15,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:15,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668010159] [2021-08-06 14:22:15,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:15,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:15,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:15,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668010159] [2021-08-06 14:22:15,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668010159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:15,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879728400] [2021-08-06 14:22:15,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:22:15,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:15,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:15,118 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 14:22:15,144 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 14:22:15,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:22:15,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:15,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:22:15,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:22:15,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879728400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:15,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:15,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-08-06 14:22:15,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842789689] [2021-08-06 14:22:15,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:22:15,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:15,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:22:15,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:22:15,666 INFO L87 Difference]: Start difference. First operand 5940 states and 37893 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:15,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:15,802 INFO L93 Difference]: Finished difference Result 11496 states and 73614 transitions. [2021-08-06 14:22:15,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:22:15,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:22:15,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:15,936 INFO L225 Difference]: With dead ends: 11496 [2021-08-06 14:22:15,936 INFO L226 Difference]: Without dead ends: 11208 [2021-08-06 14:22:15,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:22:15,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2021-08-06 14:22:16,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 9196. [2021-08-06 14:22:16,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9196 states, 9195 states have (on average 6.621098423056009) internal successors, (60881), 9195 states have internal predecessors, (60881), 0 states have call successors, (0), 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 14:22:16,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9196 states to 9196 states and 60881 transitions. [2021-08-06 14:22:16,185 INFO L78 Accepts]: Start accepts. Automaton has 9196 states and 60881 transitions. Word has length 29 [2021-08-06 14:22:16,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:16,186 INFO L470 AbstractCegarLoop]: Abstraction has 9196 states and 60881 transitions. [2021-08-06 14:22:16,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 9196 states and 60881 transitions. [2021-08-06 14:22:16,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:22:16,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:16,213 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] [2021-08-06 14:22:16,232 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 14:22:16,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 14:22:16,423 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:16,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:16,424 INFO L82 PathProgramCache]: Analyzing trace with hash -847814829, now seen corresponding path program 9 times [2021-08-06 14:22:16,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:16,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127550927] [2021-08-06 14:22:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:16,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:22:16,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:16,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127550927] [2021-08-06 14:22:16,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127550927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:16,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441132230] [2021-08-06 14:22:16,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:22:16,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:16,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:16,473 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:16,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 14:22:16,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:22:16,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:16,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:22:16,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:16,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441132230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:16,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:16,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-06 14:22:16,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863107022] [2021-08-06 14:22:16,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:22:16,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:16,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:22:16,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:22:16,915 INFO L87 Difference]: Start difference. First operand 9196 states and 60881 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:17,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:17,427 INFO L93 Difference]: Finished difference Result 25018 states and 159726 transitions. [2021-08-06 14:22:17,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:22:17,427 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:22:17,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:17,555 INFO L225 Difference]: With dead ends: 25018 [2021-08-06 14:22:17,555 INFO L226 Difference]: Without dead ends: 22353 [2021-08-06 14:22:17,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:22:17,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22353 states. [2021-08-06 14:22:18,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22353 to 13742. [2021-08-06 14:22:18,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13742 states, 13741 states have (on average 6.9258423695509785) internal successors, (95168), 13741 states have internal predecessors, (95168), 0 states have call successors, (0), 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 14:22:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13742 states to 13742 states and 95168 transitions. [2021-08-06 14:22:18,173 INFO L78 Accepts]: Start accepts. Automaton has 13742 states and 95168 transitions. Word has length 29 [2021-08-06 14:22:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:18,174 INFO L470 AbstractCegarLoop]: Abstraction has 13742 states and 95168 transitions. [2021-08-06 14:22:18,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:18,174 INFO L276 IsEmpty]: Start isEmpty. Operand 13742 states and 95168 transitions. [2021-08-06 14:22:18,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 14:22:18,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:18,214 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:18,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:18,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 14:22:18,415 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:18,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:18,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1109462170, now seen corresponding path program 10 times [2021-08-06 14:22:18,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:18,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702560454] [2021-08-06 14:22:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:18,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:18,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:18,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702560454] [2021-08-06 14:22:18,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702560454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:18,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341065812] [2021-08-06 14:22:18,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:22:18,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:18,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:18,452 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:18,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 14:22:18,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:22:18,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:18,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 14:22:18,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:18,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341065812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:18,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:18,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 14:22:18,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458403626] [2021-08-06 14:22:18,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:22:18,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:18,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:22:18,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:22:18,825 INFO L87 Difference]: Start difference. First operand 13742 states and 95168 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:19,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:19,309 INFO L93 Difference]: Finished difference Result 22024 states and 145091 transitions. [2021-08-06 14:22:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:22:19,310 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 14:22:19,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:19,390 INFO L225 Difference]: With dead ends: 22024 [2021-08-06 14:22:19,391 INFO L226 Difference]: Without dead ends: 17242 [2021-08-06 14:22:19,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:22:19,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17242 states. [2021-08-06 14:22:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17242 to 12713. [2021-08-06 14:22:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12713 states, 12712 states have (on average 6.821821900566394) internal successors, (86719), 12712 states have internal predecessors, (86719), 0 states have call successors, (0), 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 14:22:19,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12713 states to 12713 states and 86719 transitions. [2021-08-06 14:22:19,882 INFO L78 Accepts]: Start accepts. Automaton has 12713 states and 86719 transitions. Word has length 30 [2021-08-06 14:22:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:19,883 INFO L470 AbstractCegarLoop]: Abstraction has 12713 states and 86719 transitions. [2021-08-06 14:22:19,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 12713 states and 86719 transitions. [2021-08-06 14:22:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 14:22:19,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:19,922 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:19,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:20,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:20,137 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:20,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:20,137 INFO L82 PathProgramCache]: Analyzing trace with hash 465673390, now seen corresponding path program 11 times [2021-08-06 14:22:20,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:20,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891671225] [2021-08-06 14:22:20,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:20,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:20,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:20,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891671225] [2021-08-06 14:22:20,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891671225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:20,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5089749] [2021-08-06 14:22:20,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:22:20,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:20,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:20,178 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:20,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 14:22:20,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:22:20,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:20,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 14:22:20,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:20,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5089749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:20,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:20,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 14:22:20,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812507574] [2021-08-06 14:22:20,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:22:20,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:20,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:22:20,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:22:20,718 INFO L87 Difference]: Start difference. First operand 12713 states and 86719 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:21,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:21,039 INFO L93 Difference]: Finished difference Result 24284 states and 158204 transitions. [2021-08-06 14:22:21,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:22:21,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 14:22:21,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:21,245 INFO L225 Difference]: With dead ends: 24284 [2021-08-06 14:22:21,245 INFO L226 Difference]: Without dead ends: 15901 [2021-08-06 14:22:21,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:22:21,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15901 states. [2021-08-06 14:22:21,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15901 to 12713. [2021-08-06 14:22:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12713 states, 12712 states have (on average 6.732772183763373) internal successors, (85587), 12712 states have internal predecessors, (85587), 0 states have call successors, (0), 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 14:22:21,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12713 states to 12713 states and 85587 transitions. [2021-08-06 14:22:21,726 INFO L78 Accepts]: Start accepts. Automaton has 12713 states and 85587 transitions. Word has length 30 [2021-08-06 14:22:21,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:21,727 INFO L470 AbstractCegarLoop]: Abstraction has 12713 states and 85587 transitions. [2021-08-06 14:22:21,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:21,727 INFO L276 IsEmpty]: Start isEmpty. Operand 12713 states and 85587 transitions. [2021-08-06 14:22:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 14:22:21,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:21,762 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:21,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:21,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 14:22:21,969 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:21,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:21,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2003086426, now seen corresponding path program 12 times [2021-08-06 14:22:21,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:21,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904449271] [2021-08-06 14:22:21,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:21,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:22,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:22,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904449271] [2021-08-06 14:22:22,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904449271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:22,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331511597] [2021-08-06 14:22:22,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:22:22,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:22,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:22,010 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:22,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 14:22:22,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:22:22,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:22,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 14:22:22,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:22,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331511597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:22,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:22,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 14:22:22,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669266050] [2021-08-06 14:22:22,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:22:22,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:22,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:22:22,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:22:22,402 INFO L87 Difference]: Start difference. First operand 12713 states and 85587 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:22,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:22,798 INFO L93 Difference]: Finished difference Result 22021 states and 143389 transitions. [2021-08-06 14:22:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:22:22,798 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 14:22:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:22,861 INFO L225 Difference]: With dead ends: 22021 [2021-08-06 14:22:22,861 INFO L226 Difference]: Without dead ends: 15543 [2021-08-06 14:22:22,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:22:22,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15543 states. [2021-08-06 14:22:23,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15543 to 11581. [2021-08-06 14:22:23,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11581 states, 11580 states have (on average 6.59853195164076) internal successors, (76411), 11580 states have internal predecessors, (76411), 0 states have call successors, (0), 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 14:22:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11581 states to 11581 states and 76411 transitions. [2021-08-06 14:22:23,332 INFO L78 Accepts]: Start accepts. Automaton has 11581 states and 76411 transitions. Word has length 30 [2021-08-06 14:22:23,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:23,332 INFO L470 AbstractCegarLoop]: Abstraction has 11581 states and 76411 transitions. [2021-08-06 14:22:23,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:23,332 INFO L276 IsEmpty]: Start isEmpty. Operand 11581 states and 76411 transitions. [2021-08-06 14:22:23,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 14:22:23,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:23,363 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:23,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:23,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:23,569 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:23,569 INFO L82 PathProgramCache]: Analyzing trace with hash 415691786, now seen corresponding path program 13 times [2021-08-06 14:22:23,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:23,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480614173] [2021-08-06 14:22:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:23,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:23,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:23,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480614173] [2021-08-06 14:22:23,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480614173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:23,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487379321] [2021-08-06 14:22:23,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:22:23,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:23,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:23,611 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:23,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 14:22:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:23,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 14:22:23,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:24,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487379321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:24,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:24,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 14:22:24,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497614363] [2021-08-06 14:22:24,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:22:24,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:24,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:22:24,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:22:24,027 INFO L87 Difference]: Start difference. First operand 11581 states and 76411 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:24,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:24,333 INFO L93 Difference]: Finished difference Result 18164 states and 118652 transitions. [2021-08-06 14:22:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:22:24,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 14:22:24,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:24,393 INFO L225 Difference]: With dead ends: 18164 [2021-08-06 14:22:24,394 INFO L226 Difference]: Without dead ends: 14769 [2021-08-06 14:22:24,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:22:24,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14769 states. [2021-08-06 14:22:24,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14769 to 11015. [2021-08-06 14:22:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11015 states, 11014 states have (on average 6.546758670782641) internal successors, (72106), 11014 states have internal predecessors, (72106), 0 states have call successors, (0), 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 14:22:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11015 states to 11015 states and 72106 transitions. [2021-08-06 14:22:24,697 INFO L78 Accepts]: Start accepts. Automaton has 11015 states and 72106 transitions. Word has length 30 [2021-08-06 14:22:24,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:24,697 INFO L470 AbstractCegarLoop]: Abstraction has 11015 states and 72106 transitions. [2021-08-06 14:22:24,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 11015 states and 72106 transitions. [2021-08-06 14:22:24,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 14:22:24,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:24,828 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:24,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:25,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:25,041 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:25,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:25,041 INFO L82 PathProgramCache]: Analyzing trace with hash 477731400, now seen corresponding path program 14 times [2021-08-06 14:22:25,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:25,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760433036] [2021-08-06 14:22:25,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:25,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:25,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:25,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760433036] [2021-08-06 14:22:25,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760433036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:25,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426839633] [2021-08-06 14:22:25,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:22:25,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:25,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:25,074 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:25,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 14:22:25,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:22:25,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:25,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 14:22:25,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:25,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426839633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:25,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:25,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 14:22:25,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001704282] [2021-08-06 14:22:25,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:22:25,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:25,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:22:25,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:22:25,482 INFO L87 Difference]: Start difference. First operand 11015 states and 72106 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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 14:22:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:25,667 INFO L93 Difference]: Finished difference Result 16004 states and 104321 transitions. [2021-08-06 14:22:25,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:22:25,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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 30 [2021-08-06 14:22:25,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:25,721 INFO L225 Difference]: With dead ends: 16004 [2021-08-06 14:22:25,721 INFO L226 Difference]: Without dead ends: 13279 [2021-08-06 14:22:25,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:22:25,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13279 states. [2021-08-06 14:22:26,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13279 to 12147. [2021-08-06 14:22:26,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12147 states, 12146 states have (on average 6.552280586201219) internal successors, (79584), 12146 states have internal predecessors, (79584), 0 states have call successors, (0), 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 14:22:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12147 states to 12147 states and 79584 transitions. [2021-08-06 14:22:26,095 INFO L78 Accepts]: Start accepts. Automaton has 12147 states and 79584 transitions. Word has length 30 [2021-08-06 14:22:26,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:26,096 INFO L470 AbstractCegarLoop]: Abstraction has 12147 states and 79584 transitions. [2021-08-06 14:22:26,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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 14:22:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 12147 states and 79584 transitions. [2021-08-06 14:22:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 14:22:26,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:26,126 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] [2021-08-06 14:22:26,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:26,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:26,328 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:26,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:26,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2135980253, now seen corresponding path program 15 times [2021-08-06 14:22:26,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:26,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987660921] [2021-08-06 14:22:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:26,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 14:22:26,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:26,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987660921] [2021-08-06 14:22:26,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987660921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:26,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649943461] [2021-08-06 14:22:26,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:22:26,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:26,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:26,371 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:26,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 14:22:26,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:22:26,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:26,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:22:26,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:27,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649943461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:27,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:27,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 9 [2021-08-06 14:22:27,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284725605] [2021-08-06 14:22:27,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:22:27,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:27,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:22:27,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:22:27,106 INFO L87 Difference]: Start difference. First operand 12147 states and 79584 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:28,026 INFO L93 Difference]: Finished difference Result 42090 states and 268739 transitions. [2021-08-06 14:22:28,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:22:28,027 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 14:22:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:28,252 INFO L225 Difference]: With dead ends: 42090 [2021-08-06 14:22:28,252 INFO L226 Difference]: Without dead ends: 38810 [2021-08-06 14:22:28,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:22:28,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38810 states. [2021-08-06 14:22:29,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38810 to 24247. [2021-08-06 14:22:29,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24247 states, 24246 states have (on average 6.913552750969232) internal successors, (167626), 24246 states have internal predecessors, (167626), 0 states have call successors, (0), 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 14:22:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24247 states to 24247 states and 167626 transitions. [2021-08-06 14:22:29,246 INFO L78 Accepts]: Start accepts. Automaton has 24247 states and 167626 transitions. Word has length 31 [2021-08-06 14:22:29,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:29,246 INFO L470 AbstractCegarLoop]: Abstraction has 24247 states and 167626 transitions. [2021-08-06 14:22:29,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:29,246 INFO L276 IsEmpty]: Start isEmpty. Operand 24247 states and 167626 transitions. [2021-08-06 14:22:29,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:22:29,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:29,317 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-06 14:22:29,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:29,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:29,517 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:29,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:29,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1628666418, now seen corresponding path program 16 times [2021-08-06 14:22:29,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:29,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476184235] [2021-08-06 14:22:29,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:29,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:29,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:29,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476184235] [2021-08-06 14:22:29,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476184235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:29,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810404166] [2021-08-06 14:22:29,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:22:29,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:29,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:29,566 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:29,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 14:22:30,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:22:30,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:30,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:22:30,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:30,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810404166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:30,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:30,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-06 14:22:30,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846814258] [2021-08-06 14:22:30,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:22:30,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:30,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:22:30,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:22:30,310 INFO L87 Difference]: Start difference. First operand 24247 states and 167626 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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 14:22:30,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:30,924 INFO L93 Difference]: Finished difference Result 33951 states and 226852 transitions. [2021-08-06 14:22:30,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:22:30,925 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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 32 [2021-08-06 14:22:30,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:31,086 INFO L225 Difference]: With dead ends: 33951 [2021-08-06 14:22:31,086 INFO L226 Difference]: Without dead ends: 31017 [2021-08-06 14:22:31,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:22:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31017 states. [2021-08-06 14:22:31,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31017 to 23869. [2021-08-06 14:22:31,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23869 states, 23868 states have (on average 6.8552874141109434) internal successors, (163622), 23868 states have internal predecessors, (163622), 0 states have call successors, (0), 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 14:22:31,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23869 states to 23869 states and 163622 transitions. [2021-08-06 14:22:31,968 INFO L78 Accepts]: Start accepts. Automaton has 23869 states and 163622 transitions. Word has length 32 [2021-08-06 14:22:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:31,968 INFO L470 AbstractCegarLoop]: Abstraction has 23869 states and 163622 transitions. [2021-08-06 14:22:31,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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 14:22:31,969 INFO L276 IsEmpty]: Start isEmpty. Operand 23869 states and 163622 transitions. [2021-08-06 14:22:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:22:32,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:32,036 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-06 14:22:32,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:32,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-06 14:22:32,237 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:32,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:32,238 INFO L82 PathProgramCache]: Analyzing trace with hash 620042656, now seen corresponding path program 17 times [2021-08-06 14:22:32,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:32,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396099092] [2021-08-06 14:22:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:32,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:32,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:32,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396099092] [2021-08-06 14:22:32,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396099092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:32,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768155115] [2021-08-06 14:22:32,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:22:32,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:32,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:32,508 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:32,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 14:22:32,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:22:32,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:32,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:22:32,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:33,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768155115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:33,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:33,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:22:33,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655663100] [2021-08-06 14:22:33,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:22:33,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:33,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:22:33,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:22:33,027 INFO L87 Difference]: Start difference. First operand 23869 states and 163622 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:33,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:33,577 INFO L93 Difference]: Finished difference Result 35105 states and 233275 transitions. [2021-08-06 14:22:33,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:22:33,578 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:22:33,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:33,718 INFO L225 Difference]: With dead ends: 35105 [2021-08-06 14:22:33,718 INFO L226 Difference]: Without dead ends: 27952 [2021-08-06 14:22:33,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:22:33,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27952 states. [2021-08-06 14:22:34,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27952 to 21827. [2021-08-06 14:22:34,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21827 states, 21826 states have (on average 6.797443416109227) internal successors, (148361), 21826 states have internal predecessors, (148361), 0 states have call successors, (0), 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 14:22:34,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21827 states to 21827 states and 148361 transitions. [2021-08-06 14:22:34,535 INFO L78 Accepts]: Start accepts. Automaton has 21827 states and 148361 transitions. Word has length 32 [2021-08-06 14:22:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:34,536 INFO L470 AbstractCegarLoop]: Abstraction has 21827 states and 148361 transitions. [2021-08-06 14:22:34,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:34,536 INFO L276 IsEmpty]: Start isEmpty. Operand 21827 states and 148361 transitions. [2021-08-06 14:22:34,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:22:34,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:34,594 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-06 14:22:34,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:34,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-06 14:22:34,797 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:34,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1356406896, now seen corresponding path program 18 times [2021-08-06 14:22:34,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:34,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533379437] [2021-08-06 14:22:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:34,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 14:22:34,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:34,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533379437] [2021-08-06 14:22:34,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533379437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:34,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845883153] [2021-08-06 14:22:34,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:22:34,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:34,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:34,840 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:34,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 14:22:35,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:22:35,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:35,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:22:35,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:35,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845883153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:35,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:35,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-06 14:22:35,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911435443] [2021-08-06 14:22:35,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:22:35,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:35,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:22:35,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:22:35,544 INFO L87 Difference]: Start difference. First operand 21827 states and 148361 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:36,161 INFO L93 Difference]: Finished difference Result 39186 states and 256137 transitions. [2021-08-06 14:22:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:22:36,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:22:36,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:36,332 INFO L225 Difference]: With dead ends: 39186 [2021-08-06 14:22:36,332 INFO L226 Difference]: Without dead ends: 33561 [2021-08-06 14:22:36,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:22:36,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33561 states. [2021-08-06 14:22:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33561 to 21317. [2021-08-06 14:22:37,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21317 states, 21316 states have (on average 6.68540063801839) internal successors, (142506), 21316 states have internal predecessors, (142506), 0 states have call successors, (0), 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 14:22:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21317 states to 21317 states and 142506 transitions. [2021-08-06 14:22:37,284 INFO L78 Accepts]: Start accepts. Automaton has 21317 states and 142506 transitions. Word has length 32 [2021-08-06 14:22:37,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:37,284 INFO L470 AbstractCegarLoop]: Abstraction has 21317 states and 142506 transitions. [2021-08-06 14:22:37,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:37,285 INFO L276 IsEmpty]: Start isEmpty. Operand 21317 states and 142506 transitions. [2021-08-06 14:22:37,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:22:37,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:37,344 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-06 14:22:37,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-06 14:22:37,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:37,545 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:37,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2037058060, now seen corresponding path program 19 times [2021-08-06 14:22:37,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:37,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245401960] [2021-08-06 14:22:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:37,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:37,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:37,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245401960] [2021-08-06 14:22:37,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245401960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:37,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032289538] [2021-08-06 14:22:37,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:22:37,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:37,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:37,588 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:37,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 14:22:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:37,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:22:37,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:38,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032289538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:38,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:38,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-06 14:22:38,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183370300] [2021-08-06 14:22:38,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:22:38,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:38,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:22:38,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:22:38,100 INFO L87 Difference]: Start difference. First operand 21317 states and 142506 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:38,686 INFO L93 Difference]: Finished difference Result 35611 states and 232490 transitions. [2021-08-06 14:22:38,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:22:38,687 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:22:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:39,001 INFO L225 Difference]: With dead ends: 35611 [2021-08-06 14:22:39,001 INFO L226 Difference]: Without dead ends: 28971 [2021-08-06 14:22:39,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:22:39,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28971 states. [2021-08-06 14:22:39,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28971 to 20296. [2021-08-06 14:22:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20296 states, 20295 states have (on average 6.620645479182064) internal successors, (134366), 20295 states have internal predecessors, (134366), 0 states have call successors, (0), 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 14:22:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20296 states to 20296 states and 134366 transitions. [2021-08-06 14:22:39,687 INFO L78 Accepts]: Start accepts. Automaton has 20296 states and 134366 transitions. Word has length 32 [2021-08-06 14:22:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:39,688 INFO L470 AbstractCegarLoop]: Abstraction has 20296 states and 134366 transitions. [2021-08-06 14:22:39,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 20296 states and 134366 transitions. [2021-08-06 14:22:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:22:39,748 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:39,748 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-06 14:22:39,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:39,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:39,949 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:39,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:39,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1246791986, now seen corresponding path program 20 times [2021-08-06 14:22:39,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:39,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902251435] [2021-08-06 14:22:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:39,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:39,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:39,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902251435] [2021-08-06 14:22:39,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902251435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:39,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304674567] [2021-08-06 14:22:39,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:22:39,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:39,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:39,997 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:40,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 14:22:40,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:22:40,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:40,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:22:40,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:40,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304674567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:40,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:40,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:22:40,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127117717] [2021-08-06 14:22:40,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:22:40,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:40,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:22:40,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:22:40,656 INFO L87 Difference]: Start difference. First operand 20296 states and 134366 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:41,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:41,131 INFO L93 Difference]: Finished difference Result 30499 states and 199941 transitions. [2021-08-06 14:22:41,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:22:41,131 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:22:41,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:41,426 INFO L225 Difference]: With dead ends: 30499 [2021-08-06 14:22:41,426 INFO L226 Difference]: Without dead ends: 29476 [2021-08-06 14:22:41,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:22:41,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29476 states. [2021-08-06 14:22:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29476 to 20296. [2021-08-06 14:22:42,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20296 states, 20295 states have (on average 6.620645479182064) internal successors, (134366), 20295 states have internal predecessors, (134366), 0 states have call successors, (0), 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 14:22:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20296 states to 20296 states and 134366 transitions. [2021-08-06 14:22:42,188 INFO L78 Accepts]: Start accepts. Automaton has 20296 states and 134366 transitions. Word has length 32 [2021-08-06 14:22:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:42,188 INFO L470 AbstractCegarLoop]: Abstraction has 20296 states and 134366 transitions. [2021-08-06 14:22:42,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 20296 states and 134366 transitions. [2021-08-06 14:22:42,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:22:42,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:42,241 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-06 14:22:42,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:42,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 14:22:42,442 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:42,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1883991200, now seen corresponding path program 21 times [2021-08-06 14:22:42,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:42,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549903669] [2021-08-06 14:22:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:42,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:42,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:42,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549903669] [2021-08-06 14:22:42,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549903669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:42,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155184112] [2021-08-06 14:22:42,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:22:42,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:42,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:42,495 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:42,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 14:22:42,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:22:42,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:42,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:22:42,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-06 14:22:43,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155184112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:43,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:43,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-06 14:22:43,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166012218] [2021-08-06 14:22:43,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:22:43,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:43,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:22:43,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:22:43,384 INFO L87 Difference]: Start difference. First operand 20296 states and 134366 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:22:44,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:44,707 INFO L93 Difference]: Finished difference Result 51829 states and 330813 transitions. [2021-08-06 14:22:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 14:22:44,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:22:44,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:45,136 INFO L225 Difference]: With dead ends: 51829 [2021-08-06 14:22:45,136 INFO L226 Difference]: Without dead ends: 45101 [2021-08-06 14:22:45,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 368.8ms TimeCoverageRelationStatistics Valid=240, Invalid=1740, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 14:22:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45101 states. [2021-08-06 14:22:45,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45101 to 23196. [2021-08-06 14:22:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23196 states, 23195 states have (on average 6.768743263634404) internal successors, (157001), 23195 states have internal predecessors, (157001), 0 states have call successors, (0), 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 14:22:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23196 states to 23196 states and 157001 transitions. [2021-08-06 14:22:46,135 INFO L78 Accepts]: Start accepts. Automaton has 23196 states and 157001 transitions. Word has length 32 [2021-08-06 14:22:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:46,135 INFO L470 AbstractCegarLoop]: Abstraction has 23196 states and 157001 transitions. [2021-08-06 14:22:46,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:22:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 23196 states and 157001 transitions. [2021-08-06 14:22:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:22:46,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:46,446 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-06 14:22:46,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:46,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 14:22:46,661 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:46,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:46,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1883118756, now seen corresponding path program 22 times [2021-08-06 14:22:46,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:46,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2516944] [2021-08-06 14:22:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:46,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:46,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:46,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2516944] [2021-08-06 14:22:46,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2516944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:46,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299612591] [2021-08-06 14:22:46,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:22:46,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:46,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:46,707 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:46,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 14:22:47,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:22:47,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:47,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:22:47,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:47,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299612591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:47,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:47,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-06 14:22:47,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436988568] [2021-08-06 14:22:47,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:22:47,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:47,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:22:47,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:22:47,249 INFO L87 Difference]: Start difference. First operand 23196 states and 157001 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:22:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:47,860 INFO L93 Difference]: Finished difference Result 35396 states and 233654 transitions. [2021-08-06 14:22:47,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:22:47,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:22:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:48,019 INFO L225 Difference]: With dead ends: 35396 [2021-08-06 14:22:48,019 INFO L226 Difference]: Without dead ends: 31326 [2021-08-06 14:22:48,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:22:48,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31326 states. [2021-08-06 14:22:48,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31326 to 23196. [2021-08-06 14:22:48,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23196 states, 23195 states have (on average 6.743737874541927) internal successors, (156421), 23195 states have internal predecessors, (156421), 0 states have call successors, (0), 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 14:22:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23196 states to 23196 states and 156421 transitions. [2021-08-06 14:22:49,007 INFO L78 Accepts]: Start accepts. Automaton has 23196 states and 156421 transitions. Word has length 32 [2021-08-06 14:22:49,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:49,007 INFO L470 AbstractCegarLoop]: Abstraction has 23196 states and 156421 transitions. [2021-08-06 14:22:49,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:22:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 23196 states and 156421 transitions. [2021-08-06 14:22:49,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:22:49,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:49,071 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-06 14:22:49,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:49,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 14:22:49,284 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:49,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:49,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1731197376, now seen corresponding path program 23 times [2021-08-06 14:22:49,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:49,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036466327] [2021-08-06 14:22:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:49,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:49,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:49,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036466327] [2021-08-06 14:22:49,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036466327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:49,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298892834] [2021-08-06 14:22:49,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:22:49,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:49,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:49,322 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:49,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 14:22:49,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:22:49,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:49,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:22:49,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:50,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298892834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:50,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:50,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-06 14:22:50,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012162756] [2021-08-06 14:22:50,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:22:50,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:50,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:22:50,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:22:50,028 INFO L87 Difference]: Start difference. First operand 23196 states and 156421 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:22:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:50,418 INFO L93 Difference]: Finished difference Result 33071 states and 218278 transitions. [2021-08-06 14:22:50,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:22:50,418 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:22:50,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:50,727 INFO L225 Difference]: With dead ends: 33071 [2021-08-06 14:22:50,727 INFO L226 Difference]: Without dead ends: 30169 [2021-08-06 14:22:50,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:22:50,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30169 states. [2021-08-06 14:22:51,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30169 to 22616. [2021-08-06 14:22:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22616 states, 22615 states have (on average 6.669865133760778) internal successors, (150839), 22615 states have internal predecessors, (150839), 0 states have call successors, (0), 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 14:22:51,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22616 states to 22616 states and 150839 transitions. [2021-08-06 14:22:51,511 INFO L78 Accepts]: Start accepts. Automaton has 22616 states and 150839 transitions. Word has length 32 [2021-08-06 14:22:51,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:51,511 INFO L470 AbstractCegarLoop]: Abstraction has 22616 states and 150839 transitions. [2021-08-06 14:22:51,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:22:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 22616 states and 150839 transitions. [2021-08-06 14:22:51,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:22:51,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:51,574 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-06 14:22:51,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:51,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:51,775 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:51,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:51,776 INFO L82 PathProgramCache]: Analyzing trace with hash 720080126, now seen corresponding path program 24 times [2021-08-06 14:22:51,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:51,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165997117] [2021-08-06 14:22:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:51,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 14:22:51,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:51,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165997117] [2021-08-06 14:22:51,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165997117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:51,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135672831] [2021-08-06 14:22:51,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:22:51,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:51,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:51,820 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:51,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 14:22:52,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:22:52,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:52,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:22:52,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:52,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135672831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:52,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:52,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-06 14:22:52,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412964904] [2021-08-06 14:22:52,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:22:52,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:52,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:22:52,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:22:52,547 INFO L87 Difference]: Start difference. First operand 22616 states and 150839 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:22:53,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:53,300 INFO L93 Difference]: Finished difference Result 45260 states and 297817 transitions. [2021-08-06 14:22:53,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:22:53,300 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:22:53,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:53,541 INFO L225 Difference]: With dead ends: 45260 [2021-08-06 14:22:53,541 INFO L226 Difference]: Without dead ends: 32476 [2021-08-06 14:22:53,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:22:53,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32476 states. [2021-08-06 14:22:54,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32476 to 19136. [2021-08-06 14:22:54,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19136 states, 19135 states have (on average 6.5872484975176375) internal successors, (126047), 19135 states have internal predecessors, (126047), 0 states have call successors, (0), 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 14:22:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19136 states to 19136 states and 126047 transitions. [2021-08-06 14:22:54,313 INFO L78 Accepts]: Start accepts. Automaton has 19136 states and 126047 transitions. Word has length 32 [2021-08-06 14:22:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:54,313 INFO L470 AbstractCegarLoop]: Abstraction has 19136 states and 126047 transitions. [2021-08-06 14:22:54,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:22:54,313 INFO L276 IsEmpty]: Start isEmpty. Operand 19136 states and 126047 transitions. [2021-08-06 14:22:54,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:22:54,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:54,363 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-06 14:22:54,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-06 14:22:54,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:54,567 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:54,568 INFO L82 PathProgramCache]: Analyzing trace with hash 451333698, now seen corresponding path program 25 times [2021-08-06 14:22:54,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:54,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176341021] [2021-08-06 14:22:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:54,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:54,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:54,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176341021] [2021-08-06 14:22:54,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176341021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:54,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579112522] [2021-08-06 14:22:54,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:22:54,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:54,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:54,841 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:54,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 14:22:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:55,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:22:55,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:55,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579112522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:55,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:55,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:22:55,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643373031] [2021-08-06 14:22:55,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:22:55,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:55,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:22:55,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:22:55,486 INFO L87 Difference]: Start difference. First operand 19136 states and 126047 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:55,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:55,929 INFO L93 Difference]: Finished difference Result 23779 states and 156788 transitions. [2021-08-06 14:22:55,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:22:55,930 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:22:55,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:56,032 INFO L225 Difference]: With dead ends: 23779 [2021-08-06 14:22:56,032 INFO L226 Difference]: Without dead ends: 22616 [2021-08-06 14:22:56,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:22:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22616 states. [2021-08-06 14:22:56,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22616 to 20296. [2021-08-06 14:22:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20296 states, 20295 states have (on average 6.589356984478936) internal successors, (133731), 20295 states have internal predecessors, (133731), 0 states have call successors, (0), 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 14:22:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20296 states to 20296 states and 133731 transitions. [2021-08-06 14:22:56,647 INFO L78 Accepts]: Start accepts. Automaton has 20296 states and 133731 transitions. Word has length 32 [2021-08-06 14:22:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:56,648 INFO L470 AbstractCegarLoop]: Abstraction has 20296 states and 133731 transitions. [2021-08-06 14:22:56,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:56,648 INFO L276 IsEmpty]: Start isEmpty. Operand 20296 states and 133731 transitions. [2021-08-06 14:22:56,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:22:56,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:56,702 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:56,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-06 14:22:56,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:56,902 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:22:56,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:56,903 INFO L82 PathProgramCache]: Analyzing trace with hash -72806561, now seen corresponding path program 26 times [2021-08-06 14:22:56,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:56,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492824029] [2021-08-06 14:22:56,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:56,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 14:22:56,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:56,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492824029] [2021-08-06 14:22:56,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492824029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:56,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719051920] [2021-08-06 14:22:56,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:22:56,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:56,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:56,961 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:56,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 14:22:57,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:22:57,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:57,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:22:57,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-06 14:22:57,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719051920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:57,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:57,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-08-06 14:22:57,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126483872] [2021-08-06 14:22:57,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:22:57,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:57,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:22:57,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:22:57,948 INFO L87 Difference]: Start difference. First operand 20296 states and 133731 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 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 14:22:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:59,180 INFO L93 Difference]: Finished difference Result 66256 states and 420935 transitions. [2021-08-06 14:22:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 14:22:59,181 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 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 33 [2021-08-06 14:22:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:59,716 INFO L225 Difference]: With dead ends: 66256 [2021-08-06 14:22:59,716 INFO L226 Difference]: Without dead ends: 59456 [2021-08-06 14:22:59,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 283.5ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:22:59,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59456 states. [2021-08-06 14:23:01,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59456 to 31835. [2021-08-06 14:23:01,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31835 states, 31834 states have (on average 6.805648049255513) internal successors, (216651), 31834 states have internal predecessors, (216651), 0 states have call successors, (0), 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 14:23:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31835 states to 31835 states and 216651 transitions. [2021-08-06 14:23:01,265 INFO L78 Accepts]: Start accepts. Automaton has 31835 states and 216651 transitions. Word has length 33 [2021-08-06 14:23:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:01,266 INFO L470 AbstractCegarLoop]: Abstraction has 31835 states and 216651 transitions. [2021-08-06 14:23:01,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 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 14:23:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 31835 states and 216651 transitions. [2021-08-06 14:23:01,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:23:01,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:01,363 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:01,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:01,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-06 14:23:01,563 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:23:01,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:01,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1800076997, now seen corresponding path program 27 times [2021-08-06 14:23:01,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:01,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496894715] [2021-08-06 14:23:01,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:01,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-06 14:23:01,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:01,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496894715] [2021-08-06 14:23:01,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496894715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:01,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73357070] [2021-08-06 14:23:01,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:23:01,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:01,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:01,620 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:01,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 14:23:02,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:23:02,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:02,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:23:02,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-06 14:23:02,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73357070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:02,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:02,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-08-06 14:23:02,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210695773] [2021-08-06 14:23:02,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:02,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:02,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:02,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:02,577 INFO L87 Difference]: Start difference. First operand 31835 states and 216651 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 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 14:23:04,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:04,026 INFO L93 Difference]: Finished difference Result 76452 states and 499137 transitions. [2021-08-06 14:23:04,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 14:23:04,026 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 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 33 [2021-08-06 14:23:04,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:04,490 INFO L225 Difference]: With dead ends: 76452 [2021-08-06 14:23:04,490 INFO L226 Difference]: Without dead ends: 71950 [2021-08-06 14:23:04,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:23:04,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71950 states. [2021-08-06 14:23:06,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71950 to 45299. [2021-08-06 14:23:06,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45299 states, 45298 states have (on average 7.045123405006843) internal successors, (319130), 45298 states have internal predecessors, (319130), 0 states have call successors, (0), 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 14:23:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45299 states to 45299 states and 319130 transitions. [2021-08-06 14:23:06,651 INFO L78 Accepts]: Start accepts. Automaton has 45299 states and 319130 transitions. Word has length 33 [2021-08-06 14:23:06,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:06,651 INFO L470 AbstractCegarLoop]: Abstraction has 45299 states and 319130 transitions. [2021-08-06 14:23:06,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 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 14:23:06,651 INFO L276 IsEmpty]: Start isEmpty. Operand 45299 states and 319130 transitions. [2021-08-06 14:23:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 14:23:07,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:07,124 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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 14:23:07,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:07,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:07,341 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:23:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:07,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1235120450, now seen corresponding path program 28 times [2021-08-06 14:23:07,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:07,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33729340] [2021-08-06 14:23:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:07,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-06 14:23:07,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:07,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33729340] [2021-08-06 14:23:07,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33729340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:07,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322506166] [2021-08-06 14:23:07,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:23:07,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:07,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:07,393 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:07,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 14:23:07,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:23:07,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:07,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:23:07,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-06 14:23:08,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322506166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:08,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:08,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-06 14:23:08,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879662067] [2021-08-06 14:23:08,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:23:08,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:08,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:23:08,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:23:08,077 INFO L87 Difference]: Start difference. First operand 45299 states and 319130 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:09,199 INFO L93 Difference]: Finished difference Result 71328 states and 479587 transitions. [2021-08-06 14:23:09,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:23:09,199 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 14:23:09,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:09,601 INFO L225 Difference]: With dead ends: 71328 [2021-08-06 14:23:09,601 INFO L226 Difference]: Without dead ends: 61764 [2021-08-06 14:23:09,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:23:09,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61764 states. [2021-08-06 14:23:11,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61764 to 45298. [2021-08-06 14:23:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45298 states, 45297 states have (on average 6.9854957281939205) internal successors, (316422), 45297 states have internal predecessors, (316422), 0 states have call successors, (0), 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 14:23:11,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45298 states to 45298 states and 316422 transitions. [2021-08-06 14:23:11,775 INFO L78 Accepts]: Start accepts. Automaton has 45298 states and 316422 transitions. Word has length 34 [2021-08-06 14:23:11,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:11,776 INFO L470 AbstractCegarLoop]: Abstraction has 45298 states and 316422 transitions. [2021-08-06 14:23:11,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:11,776 INFO L276 IsEmpty]: Start isEmpty. Operand 45298 states and 316422 transitions. [2021-08-06 14:23:11,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 14:23:11,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:11,942 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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 14:23:11,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:12,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:12,158 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:23:12,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:12,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1110638710, now seen corresponding path program 29 times [2021-08-06 14:23:12,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:12,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468214478] [2021-08-06 14:23:12,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:12,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-06 14:23:12,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:12,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468214478] [2021-08-06 14:23:12,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468214478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:12,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331353938] [2021-08-06 14:23:12,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:23:12,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:12,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:12,209 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:12,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 14:23:12,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:23:12,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:12,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:23:12,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-06 14:23:13,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331353938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:13,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:13,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:23:13,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001477180] [2021-08-06 14:23:13,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:13,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:13,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:13,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:13,173 INFO L87 Difference]: Start difference. First operand 45298 states and 316422 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:14,176 INFO L93 Difference]: Finished difference Result 79431 states and 527696 transitions. [2021-08-06 14:23:14,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:23:14,177 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 14:23:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:14,742 INFO L225 Difference]: With dead ends: 79431 [2021-08-06 14:23:14,742 INFO L226 Difference]: Without dead ends: 54866 [2021-08-06 14:23:14,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:23:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54866 states. [2021-08-06 14:23:16,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54866 to 40122. [2021-08-06 14:23:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40122 states, 40121 states have (on average 6.923107599511478) internal successors, (277762), 40121 states have internal predecessors, (277762), 0 states have call successors, (0), 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 14:23:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40122 states to 40122 states and 277762 transitions. [2021-08-06 14:23:16,529 INFO L78 Accepts]: Start accepts. Automaton has 40122 states and 277762 transitions. Word has length 34 [2021-08-06 14:23:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:16,529 INFO L470 AbstractCegarLoop]: Abstraction has 40122 states and 277762 transitions. [2021-08-06 14:23:16,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 40122 states and 277762 transitions. [2021-08-06 14:23:16,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 14:23:16,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:16,666 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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 14:23:16,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-06 14:23:16,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 14:23:16,869 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:23:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:16,869 INFO L82 PathProgramCache]: Analyzing trace with hash -446438244, now seen corresponding path program 30 times [2021-08-06 14:23:16,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:16,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79814411] [2021-08-06 14:23:16,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:16,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-06 14:23:16,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:16,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79814411] [2021-08-06 14:23:16,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79814411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:16,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955689382] [2021-08-06 14:23:16,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:23:16,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:16,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:16,913 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:16,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 14:23:17,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:23:17,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:17,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:23:17,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-06 14:23:17,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955689382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:17,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:17,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-06 14:23:17,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773484479] [2021-08-06 14:23:17,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:17,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:17,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:17,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:17,933 INFO L87 Difference]: Start difference. First operand 40122 states and 277762 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:23:19,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:19,156 INFO L93 Difference]: Finished difference Result 85865 states and 563740 transitions. [2021-08-06 14:23:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:23:19,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 14:23:19,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:19,564 INFO L225 Difference]: With dead ends: 85865 [2021-08-06 14:23:19,564 INFO L226 Difference]: Without dead ends: 62787 [2021-08-06 14:23:19,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:23:19,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62787 states. [2021-08-06 14:23:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62787 to 39220. [2021-08-06 14:23:21,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39220 states, 39219 states have (on average 6.795660266707463) internal successors, (266519), 39219 states have internal predecessors, (266519), 0 states have call successors, (0), 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 14:23:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39220 states to 39220 states and 266519 transitions. [2021-08-06 14:23:21,705 INFO L78 Accepts]: Start accepts. Automaton has 39220 states and 266519 transitions. Word has length 34 [2021-08-06 14:23:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:21,706 INFO L470 AbstractCegarLoop]: Abstraction has 39220 states and 266519 transitions. [2021-08-06 14:23:21,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:23:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 39220 states and 266519 transitions. [2021-08-06 14:23:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 14:23:21,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:21,872 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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 14:23:21,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:22,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 14:23:22,080 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:23:22,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:22,080 INFO L82 PathProgramCache]: Analyzing trace with hash 422116352, now seen corresponding path program 31 times [2021-08-06 14:23:22,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:22,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707535488] [2021-08-06 14:23:22,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:22,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-06 14:23:22,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:22,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707535488] [2021-08-06 14:23:22,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707535488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:22,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626339164] [2021-08-06 14:23:22,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:23:22,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:22,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:22,119 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:22,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 14:23:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:22,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:23:22,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-06 14:23:22,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626339164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:22,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:22,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-06 14:23:22,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137008629] [2021-08-06 14:23:22,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:22,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:22,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:22,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:22,831 INFO L87 Difference]: Start difference. First operand 39220 states and 266519 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:23:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:24,164 INFO L93 Difference]: Finished difference Result 76848 states and 503197 transitions. [2021-08-06 14:23:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:23:24,164 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 14:23:24,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:24,524 INFO L225 Difference]: With dead ends: 76848 [2021-08-06 14:23:24,524 INFO L226 Difference]: Without dead ends: 55886 [2021-08-06 14:23:24,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:23:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55886 states. [2021-08-06 14:23:25,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55886 to 36632. [2021-08-06 14:23:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36632 states, 36631 states have (on average 6.734159591602741) internal successors, (246679), 36631 states have internal predecessors, (246679), 0 states have call successors, (0), 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 14:23:26,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36632 states to 36632 states and 246679 transitions. [2021-08-06 14:23:26,171 INFO L78 Accepts]: Start accepts. Automaton has 36632 states and 246679 transitions. Word has length 34 [2021-08-06 14:23:26,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:26,171 INFO L470 AbstractCegarLoop]: Abstraction has 36632 states and 246679 transitions. [2021-08-06 14:23:26,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:23:26,171 INFO L276 IsEmpty]: Start isEmpty. Operand 36632 states and 246679 transitions. [2021-08-06 14:23:26,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 14:23:26,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:26,632 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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 14:23:26,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:26,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 14:23:26,842 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:23:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:26,842 INFO L82 PathProgramCache]: Analyzing trace with hash -87356738, now seen corresponding path program 32 times [2021-08-06 14:23:26,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:26,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523530878] [2021-08-06 14:23:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:26,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-06 14:23:26,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:26,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523530878] [2021-08-06 14:23:26,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523530878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:26,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419136074] [2021-08-06 14:23:26,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:23:26,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:26,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:26,885 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:26,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 14:23:27,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:27,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:27,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:23:27,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-06 14:23:27,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419136074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:27,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:27,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:27,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053576400] [2021-08-06 14:23:27,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:23:27,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:27,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:23:27,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:23:27,632 INFO L87 Difference]: Start difference. First operand 36632 states and 246679 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:23:28,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:28,677 INFO L93 Difference]: Finished difference Result 57373 states and 381185 transitions. [2021-08-06 14:23:28,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:23:28,677 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 14:23:28,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:29,233 INFO L225 Difference]: With dead ends: 57373 [2021-08-06 14:23:29,233 INFO L226 Difference]: Without dead ends: 52868 [2021-08-06 14:23:29,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:23:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52868 states. [2021-08-06 14:23:30,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52868 to 36632. [2021-08-06 14:23:30,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36632 states, 36631 states have (on average 6.734159591602741) internal successors, (246679), 36631 states have internal predecessors, (246679), 0 states have call successors, (0), 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 14:23:30,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36632 states to 36632 states and 246679 transitions. [2021-08-06 14:23:30,933 INFO L78 Accepts]: Start accepts. Automaton has 36632 states and 246679 transitions. Word has length 34 [2021-08-06 14:23:30,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:30,933 INFO L470 AbstractCegarLoop]: Abstraction has 36632 states and 246679 transitions. [2021-08-06 14:23:30,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:23:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 36632 states and 246679 transitions. [2021-08-06 14:23:31,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 14:23:31,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:31,055 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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 14:23:31,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:31,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 14:23:31,256 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 14:23:31,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:31,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1127109322, now seen corresponding path program 33 times [2021-08-06 14:23:31,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:31,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233709035] [2021-08-06 14:23:31,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:31,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-06 14:23:31,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:31,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233709035] [2021-08-06 14:23:31,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233709035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:31,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630119438] [2021-08-06 14:23:31,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:23:31,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:31,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:31,301 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:31,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 14:23:32,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:23:32,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:32,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:32,125 INFO L286 TraceCheckSpWp]: Computing forward predicates...