/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 19:42:30,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 19:42:30,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 19:42:30,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 19:42:30,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 19:42:30,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 19:42:30,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 19:42:30,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 19:42:30,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 19:42:30,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 19:42:30,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 19:42:30,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 19:42:30,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 19:42:30,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 19:42:30,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 19:42:30,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 19:42:30,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-06 19:42:30,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 19:42:30,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 19:42:30,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 19:42:30,910 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-06 19:42:30,928 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 19:42:30,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 19:42:30,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 19:42:30,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 19:42:30,929 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 19:42:30,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 19:42:30,929 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 19:42:30,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 19:42:30,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 19:42:30,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 19:42:30,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 19:42:30,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 19:42:30,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 19:42:30,930 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 19:42:30,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 19:42:30,930 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 19:42:30,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 19:42:30,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 19:42:30,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 19:42:30,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 19:42:30,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 19:42:30,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:42:30,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 19:42:30,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 19:42:30,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 19:42:30,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 19:42:30,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 19:42:30,932 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 19:42:30,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 19:42:30,932 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 19:42:30,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 19:42:31,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 19:42:31,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 19:42:31,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 19:42:31,169 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 19:42:31,170 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 19:42:31,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-subst.wvr.bpl [2021-08-06 19:42:31,185 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-subst.wvr.bpl' [2021-08-06 19:42:31,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 19:42:31,219 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 19:42:31,220 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 19:42:31,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 19:42:31,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 19:42:31,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:42:31" (1/1) ... [2021-08-06 19:42:31,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:42:31" (1/1) ... [2021-08-06 19:42:31,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 19:42:31,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 19:42:31,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 19:42:31,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 19:42:31,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:42:31" (1/1) ... [2021-08-06 19:42:31,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:42:31" (1/1) ... [2021-08-06 19:42:31,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:42:31" (1/1) ... [2021-08-06 19:42:31,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:42:31" (1/1) ... [2021-08-06 19:42:31,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:42:31" (1/1) ... [2021-08-06 19:42:31,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:42:31" (1/1) ... [2021-08-06 19:42:31,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:42:31" (1/1) ... [2021-08-06 19:42:31,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 19:42:31,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 19:42:31,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 19:42:31,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 19:42:31,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:42:31" (1/1) ... [2021-08-06 19:42:31,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:42:31,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:31,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 19:42:31,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 19:42:31,328 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 19:42:31,328 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 19:42:31,329 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 19:42:31,329 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 19:42:31,329 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 19:42:31,329 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 19:42:31,329 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 19:42:31,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 19:42:31,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 19:42:31,329 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 19:42:31,329 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 19:42:31,329 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 19:42:31,330 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 19:42:31,640 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 19:42:31,640 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-06 19:42:31,640 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-06 19:42:31,641 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-06 19:42:31,641 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-08-06 19:42:31,642 INFO L202 PluginConnector]: Adding new model array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:42:31 BoogieIcfgContainer [2021-08-06 19:42:31,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 19:42:31,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 19:42:31,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 19:42:31,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 19:42:31,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:42:31" (1/2) ... [2021-08-06 19:42:31,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9ab569 and model type array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 07:42:31, skipping insertion in model container [2021-08-06 19:42:31,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:42:31" (2/2) ... [2021-08-06 19:42:31,647 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-subst.wvr.bpl [2021-08-06 19:42:31,662 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 19:42:31,663 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 19:42:31,663 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 19:42:31,663 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 19:42:31,710 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 19:42:31,751 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 19:42:31,757 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 19:42:31,757 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 19:42:31,831 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 36 states have (on average 2.0) internal successors, (72), 54 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:31,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:42:31,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:31,841 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:31,842 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:31,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:31,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2011747736, now seen corresponding path program 1 times [2021-08-06 19:42:31,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:31,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139745933] [2021-08-06 19:42:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:31,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:32,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:32,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139745933] [2021-08-06 19:42:32,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139745933] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:42:32,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:42:32,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 19:42:32,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095439238] [2021-08-06 19:42:32,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:42:32,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:32,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:42:32,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:42:32,060 INFO L87 Difference]: Start difference. First operand has 55 states, 36 states have (on average 2.0) internal successors, (72), 54 states have internal predecessors, (72), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:32,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:32,160 INFO L93 Difference]: Finished difference Result 139 states and 170 transitions. [2021-08-06 19:42:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:42:32,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-08-06 19:42:32,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:32,166 INFO L225 Difference]: With dead ends: 139 [2021-08-06 19:42:32,166 INFO L226 Difference]: Without dead ends: 36 [2021-08-06 19:42:32,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:42:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-06 19:42:32,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 20. [2021-08-06 19:42:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-08-06 19:42:32,186 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2021-08-06 19:42:32,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:32,186 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-08-06 19:42:32,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:32,186 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-08-06 19:42:32,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:42:32,187 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:32,187 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:32,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 19:42:32,187 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:32,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:32,188 INFO L82 PathProgramCache]: Analyzing trace with hash 148639604, now seen corresponding path program 1 times [2021-08-06 19:42:32,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:32,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653878895] [2021-08-06 19:42:32,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:32,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:32,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:32,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653878895] [2021-08-06 19:42:32,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653878895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:32,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357179872] [2021-08-06 19:42:32,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:32,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:32,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:32,288 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:32,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 19:42:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:42:32,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:32,401 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 94.7 percent of original size [2021-08-06 19:42:32,407 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 94.7 percent of original size [2021-08-06 19:42:32,646 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:42:32,647 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:42:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:32,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357179872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:32,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:32,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-06 19:42:32,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327921983] [2021-08-06 19:42:32,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:42:32,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:32,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:42:32,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:42:32,659 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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 19:42:32,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:32,835 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-08-06 19:42:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:42:32,835 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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 15 [2021-08-06 19:42:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:32,836 INFO L225 Difference]: With dead ends: 39 [2021-08-06 19:42:32,836 INFO L226 Difference]: Without dead ends: 27 [2021-08-06 19:42:32,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:42:32,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-06 19:42:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2021-08-06 19:42:32,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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 19:42:32,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-08-06 19:42:32,838 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2021-08-06 19:42:32,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:32,839 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-08-06 19:42:32,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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 19:42:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-08-06 19:42:32,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:42:32,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:32,839 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:32,858 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 19:42:33,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:33,040 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:33,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:33,041 INFO L82 PathProgramCache]: Analyzing trace with hash 971499157, now seen corresponding path program 1 times [2021-08-06 19:42:33,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:33,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716152276] [2021-08-06 19:42:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:33,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:33,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:33,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716152276] [2021-08-06 19:42:33,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716152276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:33,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759491841] [2021-08-06 19:42:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:33,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:33,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:33,124 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:33,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 19:42:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:33,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:42:33,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:33,234 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 94.7 percent of original size [2021-08-06 19:42:33,238 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 94.7 percent of original size [2021-08-06 19:42:33,372 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:42:33,373 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:42:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:33,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759491841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:33,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:33,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 19:42:33,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177601727] [2021-08-06 19:42:33,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:33,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:33,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:33,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:33,379 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:33,455 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-08-06 19:42:33,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:42:33,456 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:42:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:33,456 INFO L225 Difference]: With dead ends: 25 [2021-08-06 19:42:33,456 INFO L226 Difference]: Without dead ends: 16 [2021-08-06 19:42:33,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:42:33,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-06 19:42:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-06 19:42:33,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-08-06 19:42:33,458 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 15 [2021-08-06 19:42:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:33,458 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-08-06 19:42:33,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-08-06 19:42:33,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:42:33,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:33,461 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:33,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:33,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-06 19:42:33,663 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:33,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:33,663 INFO L82 PathProgramCache]: Analyzing trace with hash 552169718, now seen corresponding path program 1 times [2021-08-06 19:42:33,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:33,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012024220] [2021-08-06 19:42:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:33,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:33,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:33,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012024220] [2021-08-06 19:42:33,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012024220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:33,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042990857] [2021-08-06 19:42:33,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:33,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:33,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:33,763 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:33,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 19:42:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:33,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:42:33,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:33,902 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 96.0 percent of original size [2021-08-06 19:42:33,905 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 96.0 percent of original size [2021-08-06 19:42:34,012 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 37, result has 2.6 percent of original size [2021-08-06 19:42:34,013 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 37, result has 2.6 percent of original size [2021-08-06 19:42:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:34,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042990857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:34,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:34,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 19:42:34,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825539019] [2021-08-06 19:42:34,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:42:34,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:34,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:42:34,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:42:34,019 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:34,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:34,130 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-08-06 19:42:34,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:42:34,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:42:34,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:34,131 INFO L225 Difference]: With dead ends: 30 [2021-08-06 19:42:34,131 INFO L226 Difference]: Without dead ends: 26 [2021-08-06 19:42:34,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:42:34,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-06 19:42:34,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2021-08-06 19:42:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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 19:42:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-08-06 19:42:34,133 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2021-08-06 19:42:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:34,133 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-08-06 19:42:34,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:34,134 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-08-06 19:42:34,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:42:34,134 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:34,134 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:34,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:34,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:34,335 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:34,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:34,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1974297946, now seen corresponding path program 1 times [2021-08-06 19:42:34,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:34,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673670910] [2021-08-06 19:42:34,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:34,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:34,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:34,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673670910] [2021-08-06 19:42:34,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673670910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:34,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320274781] [2021-08-06 19:42:34,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:34,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:34,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:34,406 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:34,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 19:42:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:34,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:42:34,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:34,556 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 95.0 percent of original size [2021-08-06 19:42:34,558 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 95.0 percent of original size [2021-08-06 19:42:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:34,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320274781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:34,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:34,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 19:42:34,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811691741] [2021-08-06 19:42:34,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:34,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:34,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:34,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:34,621 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:34,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:34,675 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-08-06 19:42:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:42:34,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 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 16 [2021-08-06 19:42:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:34,676 INFO L225 Difference]: With dead ends: 27 [2021-08-06 19:42:34,676 INFO L226 Difference]: Without dead ends: 27 [2021-08-06 19:42:34,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:42:34,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-06 19:42:34,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2021-08-06 19:42:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:34,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-06 19:42:34,678 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2021-08-06 19:42:34,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:34,678 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-06 19:42:34,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:34,678 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-06 19:42:34,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:42:34,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:34,679 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:34,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:34,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:34,894 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:34,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:34,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1151438393, now seen corresponding path program 1 times [2021-08-06 19:42:34,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:34,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487669325] [2021-08-06 19:42:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:34,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:34,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:34,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487669325] [2021-08-06 19:42:34,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487669325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:34,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662233277] [2021-08-06 19:42:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:34,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:34,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:34,990 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:35,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 19:42:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:35,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:42:35,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:35,146 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 94.1 percent of original size [2021-08-06 19:42:35,148 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 94.1 percent of original size [2021-08-06 19:42:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:35,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662233277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:35,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:35,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-06 19:42:35,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066317669] [2021-08-06 19:42:35,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:42:35,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:35,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:42:35,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:42:35,226 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:35,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:35,307 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-08-06 19:42:35,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:42:35,308 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 19:42:35,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:35,308 INFO L225 Difference]: With dead ends: 20 [2021-08-06 19:42:35,308 INFO L226 Difference]: Without dead ends: 18 [2021-08-06 19:42:35,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:42:35,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-06 19:42:35,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-06 19:42:35,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:35,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-08-06 19:42:35,310 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 16 [2021-08-06 19:42:35,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:35,310 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-08-06 19:42:35,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:35,310 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-08-06 19:42:35,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:42:35,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:35,310 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:35,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:35,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:35,526 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:35,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:35,527 INFO L82 PathProgramCache]: Analyzing trace with hash 2132442647, now seen corresponding path program 1 times [2021-08-06 19:42:35,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:35,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224470960] [2021-08-06 19:42:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:35,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:35,656 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 86.8 percent of original size [2021-08-06 19:42:35,661 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 86.8 percent of original size [2021-08-06 19:42:35,691 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 74.5 percent of original size [2021-08-06 19:42:35,695 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 74.5 percent of original size [2021-08-06 19:42:35,714 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 75.7 percent of original size [2021-08-06 19:42:35,717 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 75.7 percent of original size [2021-08-06 19:42:35,744 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.2 percent of original size [2021-08-06 19:42:35,750 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.2 percent of original size [2021-08-06 19:42:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:35,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:35,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224470960] [2021-08-06 19:42:35,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224470960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:35,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255871194] [2021-08-06 19:42:35,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:35,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:35,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:35,883 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:35,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 19:42:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:35,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:42:35,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:36,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 58 [2021-08-06 19:42:36,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 116 [2021-08-06 19:42:36,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 94 [2021-08-06 19:42:36,931 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 88.1 percent of original size [2021-08-06 19:42:36,937 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 88.1 percent of original size [2021-08-06 19:42:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:36,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255871194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:36,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:36,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 19:42:36,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866897186] [2021-08-06 19:42:36,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:42:36,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:36,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:42:36,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:42:36,949 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:37,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:37,819 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-08-06 19:42:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:42:37,820 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:42:37,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:37,820 INFO L225 Difference]: With dead ends: 61 [2021-08-06 19:42:37,820 INFO L226 Difference]: Without dead ends: 53 [2021-08-06 19:42:37,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1004.9ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:42:37,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-06 19:42:37,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 21. [2021-08-06 19:42:37,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-08-06 19:42:37,830 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2021-08-06 19:42:37,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:37,831 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-08-06 19:42:37,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:37,831 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-08-06 19:42:37,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:42:37,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:37,831 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:37,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:38,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:38,037 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:38,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:38,038 INFO L82 PathProgramCache]: Analyzing trace with hash 853539783, now seen corresponding path program 2 times [2021-08-06 19:42:38,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:38,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911735291] [2021-08-06 19:42:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:38,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:42:38,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:38,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911735291] [2021-08-06 19:42:38,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911735291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:38,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104486374] [2021-08-06 19:42:38,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:42:38,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:38,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:38,143 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:38,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 19:42:38,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:42:38,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:38,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:42:38,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:38,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 47 [2021-08-06 19:42:38,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-08-06 19:42:38,450 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 66.7 percent of original size [2021-08-06 19:42:38,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 66.7 percent of original size [2021-08-06 19:42:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:42:38,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104486374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:38,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:38,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 19:42:38,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568538945] [2021-08-06 19:42:38,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:42:38,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:38,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:42:38,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:42:38,510 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:38,780 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-08-06 19:42:38,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:42:38,782 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 19:42:38,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:38,783 INFO L225 Difference]: With dead ends: 43 [2021-08-06 19:42:38,783 INFO L226 Difference]: Without dead ends: 35 [2021-08-06 19:42:38,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 306.2ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:42:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-06 19:42:38,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2021-08-06 19:42:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-08-06 19:42:38,784 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2021-08-06 19:42:38,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:38,784 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-08-06 19:42:38,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:38,785 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-08-06 19:42:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:42:38,785 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:38,785 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:38,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:38,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:38,985 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:38,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:38,986 INFO L82 PathProgramCache]: Analyzing trace with hash 592382150, now seen corresponding path program 3 times [2021-08-06 19:42:38,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:38,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740392833] [2021-08-06 19:42:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:38,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:42:39,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:39,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740392833] [2021-08-06 19:42:39,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740392833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:39,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179293853] [2021-08-06 19:42:39,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:42:39,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:39,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:39,083 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:39,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 19:42:39,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 19:42:39,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:39,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:42:39,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:39,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 47 [2021-08-06 19:42:39,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-08-06 19:42:39,455 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 66.7 percent of original size [2021-08-06 19:42:39,455 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 66.7 percent of original size [2021-08-06 19:42:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:42:39,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179293853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:39,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:39,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 19:42:39,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924859914] [2021-08-06 19:42:39,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:42:39,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:39,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:42:39,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:42:39,497 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:39,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:39,779 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-08-06 19:42:39,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:42:39,779 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 19:42:39,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:39,779 INFO L225 Difference]: With dead ends: 33 [2021-08-06 19:42:39,779 INFO L226 Difference]: Without dead ends: 22 [2021-08-06 19:42:39,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:42:39,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-06 19:42:39,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-06 19:42:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:39,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-08-06 19:42:39,781 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2021-08-06 19:42:39,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:39,781 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-08-06 19:42:39,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:39,781 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-08-06 19:42:39,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:42:39,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:39,781 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:39,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:39,984 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,SelfDestructingSolverStorable8 [2021-08-06 19:42:39,985 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:39,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:39,985 INFO L82 PathProgramCache]: Analyzing trace with hash -185578667, now seen corresponding path program 4 times [2021-08-06 19:42:39,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:39,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247006402] [2021-08-06 19:42:39,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:39,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:40,039 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 69.6 percent of original size [2021-08-06 19:42:40,042 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 69.6 percent of original size [2021-08-06 19:42:40,063 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 84.2 percent of original size [2021-08-06 19:42:40,064 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 84.2 percent of original size [2021-08-06 19:42:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:40,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:40,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247006402] [2021-08-06 19:42:40,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247006402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:40,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441469959] [2021-08-06 19:42:40,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:42:40,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:40,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:40,166 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:40,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 19:42:40,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:42:40,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:40,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 19:42:40,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:40,381 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:42:40,384 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:42:40,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 19:42:40,477 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:42:40,479 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:42:40,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 19:42:40,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 19:42:40,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 19:42:40,577 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 95.0 percent of original size [2021-08-06 19:42:40,579 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 95.0 percent of original size [2021-08-06 19:42:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:40,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441469959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:40,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:40,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-06 19:42:40,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465175320] [2021-08-06 19:42:40,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:42:40,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:40,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:42:40,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:42:40,602 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:40,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:40,768 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-08-06 19:42:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:42:40,768 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:42:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:40,768 INFO L225 Difference]: With dead ends: 31 [2021-08-06 19:42:40,768 INFO L226 Difference]: Without dead ends: 31 [2021-08-06 19:42:40,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:42:40,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-06 19:42:40,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2021-08-06 19:42:40,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 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 19:42:40,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-08-06 19:42:40,770 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2021-08-06 19:42:40,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:40,770 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-08-06 19:42:40,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:40,770 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-08-06 19:42:40,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:42:40,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:40,771 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:40,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:40,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-06 19:42:40,971 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:40,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:40,972 INFO L82 PathProgramCache]: Analyzing trace with hash -446736300, now seen corresponding path program 5 times [2021-08-06 19:42:40,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:40,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173666906] [2021-08-06 19:42:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:40,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:41,063 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.5 percent of original size [2021-08-06 19:42:41,064 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.5 percent of original size [2021-08-06 19:42:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:41,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:41,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173666906] [2021-08-06 19:42:41,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173666906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:41,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356961628] [2021-08-06 19:42:41,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:42:41,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:41,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:41,180 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:41,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 19:42:41,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:42:41,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:41,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 19:42:41,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:41,403 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 54.8 percent of original size [2021-08-06 19:42:41,406 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 54.8 percent of original size [2021-08-06 19:42:41,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 19:42:41,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-08-06 19:42:41,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 19:42:41,641 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 86.7 percent of original size [2021-08-06 19:42:41,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 86.7 percent of original size [2021-08-06 19:42:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:41,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356961628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:41,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:41,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 19:42:41,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218972475] [2021-08-06 19:42:41,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:42:41,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:41,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:42:41,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:42:41,670 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:41,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:41,877 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-08-06 19:42:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:42:41,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:42:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:41,878 INFO L225 Difference]: With dead ends: 24 [2021-08-06 19:42:41,878 INFO L226 Difference]: Without dead ends: 21 [2021-08-06 19:42:41,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 331.5ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:42:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-06 19:42:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-06 19:42:41,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 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 19:42:41,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-08-06 19:42:41,880 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2021-08-06 19:42:41,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:41,880 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-08-06 19:42:41,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:41,880 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-08-06 19:42:41,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:42:41,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:41,880 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:41,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:42,085 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,SelfDestructingSolverStorable10 [2021-08-06 19:42:42,085 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:42,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1748165448, now seen corresponding path program 6 times [2021-08-06 19:42:42,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:42,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179369757] [2021-08-06 19:42:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:42,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:42,216 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.6 percent of original size [2021-08-06 19:42:42,218 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.6 percent of original size [2021-08-06 19:42:42,234 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:42:42,236 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:42:42,255 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 77.5 percent of original size [2021-08-06 19:42:42,259 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 77.5 percent of original size [2021-08-06 19:42:42,294 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 64.1 percent of original size [2021-08-06 19:42:42,296 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 64.1 percent of original size [2021-08-06 19:42:42,315 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 69.0 percent of original size [2021-08-06 19:42:42,317 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 69.0 percent of original size [2021-08-06 19:42:42,342 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 58.9 percent of original size [2021-08-06 19:42:42,359 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 58.9 percent of original size [2021-08-06 19:42:42,394 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 97.8 percent of original size [2021-08-06 19:42:42,405 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 97.8 percent of original size [2021-08-06 19:42:42,480 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 97.6 percent of original size [2021-08-06 19:42:42,500 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 97.6 percent of original size [2021-08-06 19:42:42,566 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 98.1 percent of original size [2021-08-06 19:42:42,575 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 98.1 percent of original size [2021-08-06 19:42:42,645 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 98.1 percent of original size [2021-08-06 19:42:42,655 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 98.1 percent of original size [2021-08-06 19:42:42,733 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 90.5 percent of original size [2021-08-06 19:42:42,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 90.5 percent of original size [2021-08-06 19:42:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:42,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:42,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179369757] [2021-08-06 19:42:42,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179369757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:42,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526022601] [2021-08-06 19:42:42,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:42:42,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:42,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:42,800 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:42,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 19:42:42,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 19:42:42,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:42,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-06 19:42:42,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:43,088 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 66.4 percent of original size [2021-08-06 19:42:43,095 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 66.4 percent of original size [2021-08-06 19:42:43,529 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 77.1 percent of original size [2021-08-06 19:42:43,541 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 77.1 percent of original size [2021-08-06 19:42:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 19:42:43,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 19:42:43,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 95 [2021-08-06 19:42:44,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 165 [2021-08-06 19:42:44,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 136 [2021-08-06 19:42:44,649 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 93.9 percent of original size [2021-08-06 19:42:44,673 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 93.9 percent of original size [2021-08-06 19:42:45,521 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 73.1 percent of original size [2021-08-06 19:42:45,528 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 73.1 percent of original size [2021-08-06 19:42:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:45,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526022601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:45,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:45,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-08-06 19:42:45,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454542984] [2021-08-06 19:42:45,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:42:45,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:45,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:42:45,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:42:45,591 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:48,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:48,055 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-08-06 19:42:48,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:42:48,056 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:42:48,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:48,056 INFO L225 Difference]: With dead ends: 48 [2021-08-06 19:42:48,056 INFO L226 Difference]: Without dead ends: 22 [2021-08-06 19:42:48,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 3078.8ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:42:48,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-06 19:42:48,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-06 19:42:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:48,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-08-06 19:42:48,058 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 20 [2021-08-06 19:42:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:48,058 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-08-06 19:42:48,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-08-06 19:42:48,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:42:48,058 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:48,058 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:48,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:48,264 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,SelfDestructingSolverStorable11 [2021-08-06 19:42:48,265 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:48,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:48,265 INFO L82 PathProgramCache]: Analyzing trace with hash -412252330, now seen corresponding path program 7 times [2021-08-06 19:42:48,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:48,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820783198] [2021-08-06 19:42:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:48,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:48,401 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 56.1 percent of original size [2021-08-06 19:42:48,403 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 56.1 percent of original size [2021-08-06 19:42:48,422 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 39.6 percent of original size [2021-08-06 19:42:48,423 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 39.6 percent of original size [2021-08-06 19:42:48,431 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 46.1 percent of original size [2021-08-06 19:42:48,433 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 46.1 percent of original size [2021-08-06 19:42:48,459 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 44, result has 46.3 percent of original size [2021-08-06 19:42:48,462 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 44, result has 46.3 percent of original size [2021-08-06 19:42:48,503 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 73.0 percent of original size [2021-08-06 19:42:48,508 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 73.0 percent of original size [2021-08-06 19:42:48,559 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 79.3 percent of original size [2021-08-06 19:42:48,563 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 79.3 percent of original size [2021-08-06 19:42:48,600 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 77.8 percent of original size [2021-08-06 19:42:48,604 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 77.8 percent of original size [2021-08-06 19:42:48,660 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 78.0 percent of original size [2021-08-06 19:42:48,663 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 78.0 percent of original size [2021-08-06 19:42:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:48,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:48,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820783198] [2021-08-06 19:42:48,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820783198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:48,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853053763] [2021-08-06 19:42:48,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:42:48,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:48,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:48,754 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:48,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 19:42:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:49,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:42:49,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:49,132 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:42:49,134 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:42:49,320 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 61.0 percent of original size [2021-08-06 19:42:49,328 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 61.0 percent of original size [2021-08-06 19:42:49,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2021-08-06 19:42:49,599 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 72.8 percent of original size [2021-08-06 19:42:49,608 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 72.8 percent of original size [2021-08-06 19:42:49,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 19:42:49,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2021-08-06 19:42:49,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2021-08-06 19:42:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:49,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853053763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:49,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:49,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 19:42:49,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289984410] [2021-08-06 19:42:49,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:42:49,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:49,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:42:49,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:42:49,888 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:51,095 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-08-06 19:42:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:42:51,095 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:42:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:51,095 INFO L225 Difference]: With dead ends: 38 [2021-08-06 19:42:51,095 INFO L226 Difference]: Without dead ends: 34 [2021-08-06 19:42:51,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1483.7ms TimeCoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:42:51,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-06 19:42:51,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2021-08-06 19:42:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-08-06 19:42:51,098 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2021-08-06 19:42:51,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:51,098 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-08-06 19:42:51,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-08-06 19:42:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:42:51,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:51,098 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:51,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-06 19:42:51,300 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,SelfDestructingSolverStorable12 [2021-08-06 19:42:51,301 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:51,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:51,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1477798778, now seen corresponding path program 8 times [2021-08-06 19:42:51,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:51,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944850162] [2021-08-06 19:42:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:51,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:51,336 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 69.6 percent of original size [2021-08-06 19:42:51,337 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 69.6 percent of original size [2021-08-06 19:42:51,357 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 84.2 percent of original size [2021-08-06 19:42:51,358 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 84.2 percent of original size [2021-08-06 19:42:51,369 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 84.2 percent of original size [2021-08-06 19:42:51,369 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 84.2 percent of original size [2021-08-06 19:42:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:51,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:51,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944850162] [2021-08-06 19:42:51,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944850162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:51,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462459814] [2021-08-06 19:42:51,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:42:51,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:51,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:51,470 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 19:42:51,470 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 19:42:51,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:42:51,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:51,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 19:42:51,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:51,867 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:42:51,869 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:42:51,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 19:42:51,980 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:42:51,982 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:42:52,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 19:42:52,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 19:42:52,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 19:42:52,112 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 95.0 percent of original size [2021-08-06 19:42:52,114 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 95.0 percent of original size [2021-08-06 19:42:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:52,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462459814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:52,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:52,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-08-06 19:42:52,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091238045] [2021-08-06 19:42:52,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:42:52,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:52,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:42:52,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:42:52,135 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:52,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:52,348 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-08-06 19:42:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:42:52,348 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:42:52,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:52,349 INFO L225 Difference]: With dead ends: 35 [2021-08-06 19:42:52,349 INFO L226 Difference]: Without dead ends: 35 [2021-08-06 19:42:52,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:42:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-06 19:42:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2021-08-06 19:42:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:52,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-08-06 19:42:52,351 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 22 [2021-08-06 19:42:52,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:52,352 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-08-06 19:42:52,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:52,352 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-08-06 19:42:52,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:42:52,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:52,353 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:52,373 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 19:42:52,558 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,SelfDestructingSolverStorable13 [2021-08-06 19:42:52,558 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:52,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:52,558 INFO L82 PathProgramCache]: Analyzing trace with hash -983750809, now seen corresponding path program 9 times [2021-08-06 19:42:52,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:52,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653040584] [2021-08-06 19:42:52,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:52,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:52,649 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.5 percent of original size [2021-08-06 19:42:52,650 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.5 percent of original size [2021-08-06 19:42:52,665 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.5 percent of original size [2021-08-06 19:42:52,667 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.5 percent of original size [2021-08-06 19:42:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:52,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:52,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653040584] [2021-08-06 19:42:52,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653040584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:52,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860765770] [2021-08-06 19:42:52,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:42:52,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:52,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:52,791 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 19:42:52,792 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 19:42:53,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:42:53,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:53,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 19:42:53,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:53,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 54.8 percent of original size [2021-08-06 19:42:53,210 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 54.8 percent of original size [2021-08-06 19:42:53,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 19:42:53,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-08-06 19:42:53,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 19:42:53,499 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 86.7 percent of original size [2021-08-06 19:42:53,500 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 86.7 percent of original size [2021-08-06 19:42:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:53,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860765770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:53,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:53,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-06 19:42:53,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502027296] [2021-08-06 19:42:53,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:42:53,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:53,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:42:53,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:42:53,521 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:53,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:53,805 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-08-06 19:42:53,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:42:53,805 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:42:53,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:53,805 INFO L225 Difference]: With dead ends: 28 [2021-08-06 19:42:53,805 INFO L226 Difference]: Without dead ends: 24 [2021-08-06 19:42:53,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 487.5ms TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:42:53,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-06 19:42:53,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-06 19:42:53,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:53,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-08-06 19:42:53,807 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 22 [2021-08-06 19:42:53,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:53,807 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-08-06 19:42:53,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-08-06 19:42:53,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:42:53,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:53,807 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:53,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-06 19:42:54,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:54,008 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:54,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:54,009 INFO L82 PathProgramCache]: Analyzing trace with hash 344047671, now seen corresponding path program 10 times [2021-08-06 19:42:54,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:54,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403928112] [2021-08-06 19:42:54,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:54,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:54,058 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.5 percent of original size [2021-08-06 19:42:54,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.5 percent of original size [2021-08-06 19:42:54,074 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 87.0 percent of original size [2021-08-06 19:42:54,076 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 87.0 percent of original size [2021-08-06 19:42:54,093 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 87.0 percent of original size [2021-08-06 19:42:54,095 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 87.0 percent of original size [2021-08-06 19:42:54,113 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 87.5 percent of original size [2021-08-06 19:42:54,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 87.5 percent of original size [2021-08-06 19:42:54,149 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 75.9 percent of original size [2021-08-06 19:42:54,151 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 75.9 percent of original size [2021-08-06 19:42:54,173 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 73.3 percent of original size [2021-08-06 19:42:54,175 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 73.3 percent of original size [2021-08-06 19:42:54,207 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 63.1 percent of original size [2021-08-06 19:42:54,209 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 63.1 percent of original size [2021-08-06 19:42:54,247 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 63.1 percent of original size [2021-08-06 19:42:54,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 63.1 percent of original size [2021-08-06 19:42:54,285 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 88.5 percent of original size [2021-08-06 19:42:54,297 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 88.5 percent of original size [2021-08-06 19:42:54,670 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 49.4 percent of original size [2021-08-06 19:42:54,675 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 49.4 percent of original size [2021-08-06 19:42:54,724 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 36, result has 49.3 percent of original size [2021-08-06 19:42:54,728 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 36, result has 49.3 percent of original size [2021-08-06 19:42:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:54,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:54,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403928112] [2021-08-06 19:42:54,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403928112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:54,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684074267] [2021-08-06 19:42:54,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:42:54,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:54,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:54,764 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 19:42:54,765 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 19:42:55,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:42:55,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:55,123 WARN L261 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-06 19:42:55,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:55,243 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 64.7 percent of original size [2021-08-06 19:42:55,252 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 64.7 percent of original size [2021-08-06 19:42:55,331 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 59.8 percent of original size [2021-08-06 19:42:55,335 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 59.8 percent of original size [2021-08-06 19:42:55,558 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 92.9 percent of original size [2021-08-06 19:42:55,564 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 92.9 percent of original size [2021-08-06 19:42:55,634 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 67.0 percent of original size [2021-08-06 19:42:55,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 67.0 percent of original size [2021-08-06 19:42:55,792 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 64.2 percent of original size [2021-08-06 19:42:55,799 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 64.2 percent of original size [2021-08-06 19:42:55,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 73 [2021-08-06 19:42:56,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 83 [2021-08-06 19:42:56,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2021-08-06 19:42:56,500 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 87.3 percent of original size [2021-08-06 19:42:56,504 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 87.3 percent of original size [2021-08-06 19:42:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:56,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684074267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:56,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:56,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-08-06 19:42:56,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201908003] [2021-08-06 19:42:56,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:42:56,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:56,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:42:56,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=751, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:42:56,514 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:59,263 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-08-06 19:42:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:42:59,263 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:42:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:59,263 INFO L225 Difference]: With dead ends: 75 [2021-08-06 19:42:59,263 INFO L226 Difference]: Without dead ends: 67 [2021-08-06 19:42:59,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 3267.9ms TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 19:42:59,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-06 19:42:59,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 27. [2021-08-06 19:42:59,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:59,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-08-06 19:42:59,266 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2021-08-06 19:42:59,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:59,266 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-08-06 19:42:59,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:59,266 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-08-06 19:42:59,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:42:59,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:59,266 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:59,285 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 19:42:59,480 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,SelfDestructingSolverStorable15 [2021-08-06 19:42:59,481 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:42:59,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:59,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1443872409, now seen corresponding path program 11 times [2021-08-06 19:42:59,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:59,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407919095] [2021-08-06 19:42:59,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:59,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 19:42:59,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:59,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407919095] [2021-08-06 19:42:59,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407919095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:59,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8877609] [2021-08-06 19:42:59,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:42:59,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:59,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:59,649 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 19:42:59,682 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 19:43:00,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:43:00,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:00,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:43:00,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:00,209 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 64.7 percent of original size [2021-08-06 19:43:00,216 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 64.7 percent of original size [2021-08-06 19:43:00,307 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 68.5 percent of original size [2021-08-06 19:43:00,314 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 68.5 percent of original size [2021-08-06 19:43:00,365 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 19:43:00,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 86 [2021-08-06 19:43:00,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:43:00,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 90 [2021-08-06 19:43:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 19:43:00,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8877609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:00,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:00,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 19:43:00,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546172662] [2021-08-06 19:43:00,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 19:43:00,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:00,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 19:43:00,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:43:00,716 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:01,231 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-08-06 19:43:01,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:43:01,232 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 19:43:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:01,232 INFO L225 Difference]: With dead ends: 55 [2021-08-06 19:43:01,232 INFO L226 Difference]: Without dead ends: 45 [2021-08-06 19:43:01,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 644.7ms TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:43:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-06 19:43:01,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-08-06 19:43:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-08-06 19:43:01,234 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2021-08-06 19:43:01,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:01,234 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-08-06 19:43:01,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-08-06 19:43:01,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:43:01,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:01,234 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:01,252 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 19:43:01,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-06 19:43:01,445 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:43:01,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:01,446 INFO L82 PathProgramCache]: Analyzing trace with hash 986712742, now seen corresponding path program 12 times [2021-08-06 19:43:01,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:01,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216017946] [2021-08-06 19:43:01,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:01,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 19:43:01,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:01,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216017946] [2021-08-06 19:43:01,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216017946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:01,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121586248] [2021-08-06 19:43:01,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:43:01,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:01,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:01,587 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 19:43:01,588 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 19:43:02,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:43:02,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:02,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:43:02,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:02,153 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 64.7 percent of original size [2021-08-06 19:43:02,159 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 64.7 percent of original size [2021-08-06 19:43:02,240 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 68.5 percent of original size [2021-08-06 19:43:02,246 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 68.5 percent of original size [2021-08-06 19:43:02,293 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 19:43:02,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 86 [2021-08-06 19:43:02,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:43:02,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 90 [2021-08-06 19:43:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 19:43:02,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121586248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:02,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:02,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 19:43:02,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443666302] [2021-08-06 19:43:02,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 19:43:02,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:02,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 19:43:02,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:43:02,639 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:03,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:03,142 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-08-06 19:43:03,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:43:03,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 19:43:03,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:03,142 INFO L225 Difference]: With dead ends: 43 [2021-08-06 19:43:03,142 INFO L226 Difference]: Without dead ends: 28 [2021-08-06 19:43:03,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 653.8ms TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:43:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-06 19:43:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-06 19:43:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-08-06 19:43:03,144 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2021-08-06 19:43:03,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:03,144 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-08-06 19:43:03,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:03,144 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-08-06 19:43:03,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:43:03,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:03,145 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:03,163 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 19:43:03,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 19:43:03,359 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:43:03,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:03,359 INFO L82 PathProgramCache]: Analyzing trace with hash 66989685, now seen corresponding path program 13 times [2021-08-06 19:43:03,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:03,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137176947] [2021-08-06 19:43:03,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:03,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:03,401 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 69.6 percent of original size [2021-08-06 19:43:03,402 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 69.6 percent of original size [2021-08-06 19:43:03,423 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 84.2 percent of original size [2021-08-06 19:43:03,424 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 84.2 percent of original size [2021-08-06 19:43:03,436 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 84.2 percent of original size [2021-08-06 19:43:03,437 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 84.2 percent of original size [2021-08-06 19:43:03,449 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 84.2 percent of original size [2021-08-06 19:43:03,450 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 84.2 percent of original size [2021-08-06 19:43:03,465 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 84.2 percent of original size [2021-08-06 19:43:03,466 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 84.2 percent of original size [2021-08-06 19:43:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:03,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:03,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137176947] [2021-08-06 19:43:03,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137176947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:03,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105479082] [2021-08-06 19:43:03,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:43:03,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:03,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:03,575 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 19:43:03,576 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 19:43:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:04,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 19:43:04,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:04,123 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:43:04,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:43:04,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 19:43:04,259 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:43:04,261 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:43:04,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 19:43:04,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 19:43:04,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 19:43:04,446 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1, result has 95.0 percent of original size [2021-08-06 19:43:04,447 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1, result has 95.0 percent of original size [2021-08-06 19:43:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:04,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105479082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:04,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:04,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-08-06 19:43:04,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387402788] [2021-08-06 19:43:04,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:43:04,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:04,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:43:04,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:43:04,467 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:04,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:04,739 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-08-06 19:43:04,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:43:04,739 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:43:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:04,739 INFO L225 Difference]: With dead ends: 39 [2021-08-06 19:43:04,739 INFO L226 Difference]: Without dead ends: 39 [2021-08-06 19:43:04,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 369.4ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:43:04,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-06 19:43:04,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-08-06 19:43:04,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:04,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-08-06 19:43:04,742 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 25 [2021-08-06 19:43:04,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:04,742 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-08-06 19:43:04,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:04,743 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-08-06 19:43:04,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:43:04,743 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:04,743 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:04,760 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 19:43:04,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:04,944 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:43:04,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:04,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1797392460, now seen corresponding path program 14 times [2021-08-06 19:43:04,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:04,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050270932] [2021-08-06 19:43:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:04,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:04,984 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 80.0 percent of original size [2021-08-06 19:43:04,985 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 80.0 percent of original size [2021-08-06 19:43:05,007 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 85.7 percent of original size [2021-08-06 19:43:05,008 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 85.7 percent of original size [2021-08-06 19:43:05,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 85.7 percent of original size [2021-08-06 19:43:05,021 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 85.7 percent of original size [2021-08-06 19:43:05,034 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 85.7 percent of original size [2021-08-06 19:43:05,034 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 85.7 percent of original size [2021-08-06 19:43:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:05,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:05,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050270932] [2021-08-06 19:43:05,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050270932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:05,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365652578] [2021-08-06 19:43:05,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:43:05,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:05,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:05,162 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 19:43:05,165 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 19:43:05,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:43:05,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:05,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 19:43:05,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:05,746 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:43:05,748 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:43:05,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 19:43:06,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-08-06 19:43:06,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 19:43:06,041 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 86.7 percent of original size [2021-08-06 19:43:06,043 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 86.7 percent of original size [2021-08-06 19:43:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:06,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365652578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:06,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:06,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-08-06 19:43:06,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178969085] [2021-08-06 19:43:06,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:43:06,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:06,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:43:06,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:43:06,063 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:06,331 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-08-06 19:43:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:43:06,331 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:43:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:06,332 INFO L225 Difference]: With dead ends: 32 [2021-08-06 19:43:06,332 INFO L226 Difference]: Without dead ends: 27 [2021-08-06 19:43:06,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 426.1ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:43:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-06 19:43:06,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-06 19:43:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-08-06 19:43:06,333 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2021-08-06 19:43:06,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:06,333 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-08-06 19:43:06,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-08-06 19:43:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:43:06,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:06,334 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:06,352 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 19:43:06,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:06,535 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:43:06,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:06,535 INFO L82 PathProgramCache]: Analyzing trace with hash 987849768, now seen corresponding path program 15 times [2021-08-06 19:43:06,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:06,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659099278] [2021-08-06 19:43:06,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:06,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:06,667 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 82.9 percent of original size [2021-08-06 19:43:06,668 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 82.9 percent of original size [2021-08-06 19:43:06,685 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 81.8 percent of original size [2021-08-06 19:43:06,687 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 81.8 percent of original size [2021-08-06 19:43:06,705 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 81.8 percent of original size [2021-08-06 19:43:06,707 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 81.8 percent of original size [2021-08-06 19:43:06,727 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 81.8 percent of original size [2021-08-06 19:43:06,729 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 81.8 percent of original size [2021-08-06 19:43:06,750 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 89.8 percent of original size [2021-08-06 19:43:06,753 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 89.8 percent of original size [2021-08-06 19:43:06,787 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 75.9 percent of original size [2021-08-06 19:43:06,789 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 75.9 percent of original size [2021-08-06 19:43:06,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 46, result has 62.6 percent of original size [2021-08-06 19:43:06,816 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 46, result has 62.6 percent of original size [2021-08-06 19:43:06,849 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 69, result has 47.3 percent of original size [2021-08-06 19:43:06,852 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 69, result has 47.3 percent of original size [2021-08-06 19:43:06,887 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 69, result has 47.3 percent of original size [2021-08-06 19:43:06,890 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 69, result has 47.3 percent of original size [2021-08-06 19:43:06,928 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 69, result has 47.3 percent of original size [2021-08-06 19:43:06,940 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 69, result has 47.3 percent of original size [2021-08-06 19:43:06,993 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 242, result has 47.5 percent of original size [2021-08-06 19:43:07,035 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 242, result has 47.5 percent of original size [2021-08-06 19:43:07,132 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 173, result has 54.8 percent of original size [2021-08-06 19:43:07,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 173, result has 54.8 percent of original size [2021-08-06 19:43:07,256 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 242, result has 54.4 percent of original size [2021-08-06 19:43:07,274 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 242, result has 54.4 percent of original size [2021-08-06 19:43:07,392 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 328, result has 49.4 percent of original size [2021-08-06 19:43:07,415 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 328, result has 49.4 percent of original size [2021-08-06 19:43:07,533 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 463, result has 51.6 percent of original size [2021-08-06 19:43:07,561 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 463, result has 51.6 percent of original size [2021-08-06 19:43:07,703 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 329, result has 33.9 percent of original size [2021-08-06 19:43:07,716 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 329, result has 33.9 percent of original size [2021-08-06 19:43:07,810 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 133, result has 34.2 percent of original size [2021-08-06 19:43:07,821 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 133, result has 34.2 percent of original size [2021-08-06 19:43:07,877 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 107, result has 39.2 percent of original size [2021-08-06 19:43:07,888 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 107, result has 39.2 percent of original size [2021-08-06 19:43:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:07,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:07,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659099278] [2021-08-06 19:43:07,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659099278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:07,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654767328] [2021-08-06 19:43:07,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:43:07,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:07,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:07,913 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 19:43:07,923 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 19:43:08,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:43:08,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:08,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 84 conjunts are in the unsatisfiable core [2021-08-06 19:43:08,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:08,589 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 64.7 percent of original size [2021-08-06 19:43:08,594 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 64.7 percent of original size [2021-08-06 19:43:08,673 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 66.7 percent of original size [2021-08-06 19:43:08,678 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 66.7 percent of original size [2021-08-06 19:43:08,765 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 69.4 percent of original size [2021-08-06 19:43:08,771 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 69.4 percent of original size [2021-08-06 19:43:09,385 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 112, result has 56.9 percent of original size [2021-08-06 19:43:09,399 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 112, result has 56.9 percent of original size [2021-08-06 19:43:09,497 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 95.4 percent of original size [2021-08-06 19:43:09,509 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 95.4 percent of original size [2021-08-06 19:43:09,609 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 65.2 percent of original size [2021-08-06 19:43:09,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 65.2 percent of original size [2021-08-06 19:43:09,717 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 95.4 percent of original size [2021-08-06 19:43:09,730 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 95.4 percent of original size [2021-08-06 19:43:09,824 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 62.4 percent of original size [2021-08-06 19:43:09,837 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 62.4 percent of original size [2021-08-06 19:43:09,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 104 [2021-08-06 19:43:09,914 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 92.0 percent of original size [2021-08-06 19:43:09,921 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 92.0 percent of original size [2021-08-06 19:43:11,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 131 [2021-08-06 19:43:11,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 94 [2021-08-06 19:43:11,371 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 77.8 percent of original size [2021-08-06 19:43:11,375 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 77.8 percent of original size [2021-08-06 19:43:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:11,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654767328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:11,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:11,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-08-06 19:43:11,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123972985] [2021-08-06 19:43:11,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 19:43:11,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:11,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 19:43:11,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1110, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:43:11,385 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:15,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:15,822 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-08-06 19:43:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:43:15,822 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 19:43:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:15,823 INFO L225 Difference]: With dead ends: 82 [2021-08-06 19:43:15,823 INFO L226 Difference]: Without dead ends: 74 [2021-08-06 19:43:15,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 5461.8ms TimeCoverageRelationStatistics Valid=285, Invalid=2471, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 19:43:15,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-06 19:43:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 37. [2021-08-06 19:43:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:15,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-08-06 19:43:15,825 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2021-08-06 19:43:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:15,825 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-08-06 19:43:15,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-08-06 19:43:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 19:43:15,825 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:15,825 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:15,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-06 19:43:16,029 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,SelfDestructingSolverStorable20 [2021-08-06 19:43:16,029 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:43:16,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:16,029 INFO L82 PathProgramCache]: Analyzing trace with hash -530258731, now seen corresponding path program 16 times [2021-08-06 19:43:16,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:16,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323518753] [2021-08-06 19:43:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:16,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:16,054 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:43:16,055 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:43:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-06 19:43:16,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:16,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323518753] [2021-08-06 19:43:16,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323518753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:16,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451983737] [2021-08-06 19:43:16,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:43:16,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:16,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:16,248 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 19:43:16,250 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 19:43:16,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:43:16,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:16,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 19:43:16,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:16,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 64.7 percent of original size [2021-08-06 19:43:17,004 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 64.7 percent of original size [2021-08-06 19:43:17,094 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 68.5 percent of original size [2021-08-06 19:43:17,101 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 68.5 percent of original size [2021-08-06 19:43:17,235 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 71.1 percent of original size [2021-08-06 19:43:17,242 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 71.1 percent of original size [2021-08-06 19:43:17,296 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-08-06 19:43:17,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 104 [2021-08-06 19:43:17,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:43:17,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 127 [2021-08-06 19:43:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-06 19:43:17,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451983737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:17,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:17,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 19:43:17,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129570569] [2021-08-06 19:43:17,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:43:17,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:17,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:43:17,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:43:17,841 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:18,494 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-08-06 19:43:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:43:18,495 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 19:43:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:18,495 INFO L225 Difference]: With dead ends: 59 [2021-08-06 19:43:18,495 INFO L226 Difference]: Without dead ends: 48 [2021-08-06 19:43:18,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 878.9ms TimeCoverageRelationStatistics Valid=252, Invalid=1008, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:43:18,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-06 19:43:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-08-06 19:43:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:18,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-08-06 19:43:18,500 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 27 [2021-08-06 19:43:18,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:18,501 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-08-06 19:43:18,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:18,501 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-08-06 19:43:18,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 19:43:18,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:18,501 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:18,521 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 19:43:18,708 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,SelfDestructingSolverStorable21 [2021-08-06 19:43:18,709 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:43:18,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:18,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1227376054, now seen corresponding path program 17 times [2021-08-06 19:43:18,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:18,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339965253] [2021-08-06 19:43:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:18,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:18,895 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 56.1 percent of original size [2021-08-06 19:43:18,897 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 56.1 percent of original size [2021-08-06 19:43:18,917 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 39.6 percent of original size [2021-08-06 19:43:18,919 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 39.6 percent of original size [2021-08-06 19:43:18,926 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 46.1 percent of original size [2021-08-06 19:43:18,928 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 46.1 percent of original size [2021-08-06 19:43:18,954 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 48.1 percent of original size [2021-08-06 19:43:18,957 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 48.1 percent of original size [2021-08-06 19:43:18,989 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 48.1 percent of original size [2021-08-06 19:43:18,992 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 48.1 percent of original size [2021-08-06 19:43:19,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 48.1 percent of original size [2021-08-06 19:43:19,028 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 48.1 percent of original size [2021-08-06 19:43:19,063 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 84, result has 50.6 percent of original size [2021-08-06 19:43:19,069 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 84, result has 50.6 percent of original size [2021-08-06 19:43:19,126 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 59, result has 53.9 percent of original size [2021-08-06 19:43:19,130 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 59, result has 53.9 percent of original size [2021-08-06 19:43:19,172 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 81, result has 52.9 percent of original size [2021-08-06 19:43:19,176 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 81, result has 52.9 percent of original size [2021-08-06 19:43:19,219 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 54.0 percent of original size [2021-08-06 19:43:19,224 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 54.0 percent of original size [2021-08-06 19:43:19,274 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 54.0 percent of original size [2021-08-06 19:43:19,279 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 54.0 percent of original size [2021-08-06 19:43:19,330 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 54.0 percent of original size [2021-08-06 19:43:19,334 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 54.0 percent of original size [2021-08-06 19:43:19,386 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 47.0 percent of original size [2021-08-06 19:43:19,390 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 47.0 percent of original size [2021-08-06 19:43:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:19,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:19,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339965253] [2021-08-06 19:43:19,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339965253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:19,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065791348] [2021-08-06 19:43:19,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:43:19,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:19,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:19,432 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 19:43:19,434 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 19:43:20,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:43:20,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:20,113 WARN L261 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 85 conjunts are in the unsatisfiable core [2021-08-06 19:43:20,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:20,241 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 64.7 percent of original size [2021-08-06 19:43:20,246 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 64.7 percent of original size [2021-08-06 19:43:20,325 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 67.7 percent of original size [2021-08-06 19:43:20,330 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 67.7 percent of original size [2021-08-06 19:43:20,414 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 68.5 percent of original size [2021-08-06 19:43:20,420 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 68.5 percent of original size [2021-08-06 19:43:20,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 62.0 percent of original size [2021-08-06 19:43:20,521 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 62.0 percent of original size [2021-08-06 19:43:20,808 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 93.2 percent of original size [2021-08-06 19:43:20,819 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 93.2 percent of original size [2021-08-06 19:43:20,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 48, result has 72.3 percent of original size [2021-08-06 19:43:20,941 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 48, result has 72.3 percent of original size [2021-08-06 19:43:21,134 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 48, result has 73.3 percent of original size [2021-08-06 19:43:21,155 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 48, result has 73.3 percent of original size [2021-08-06 19:43:21,323 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 48, result has 71.1 percent of original size [2021-08-06 19:43:21,331 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 48, result has 71.1 percent of original size [2021-08-06 19:43:21,359 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2021-08-06 19:43:21,377 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 19:43:21,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:21,564 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Alternating quantifiers not yet supported at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:313) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:95) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:80) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:75) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:918) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:880) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:798) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:235) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateCompat(PartialQuantifierElimination.java:128) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateCompat(PartialQuantifierElimination.java:151) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:438) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:385) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-08-06 19:43:21,565 INFO L168 Benchmark]: Toolchain (without parser) took 50346.18 ms. Allocated memory was 190.8 MB in the beginning and 486.5 MB in the end (delta: 295.7 MB). Free memory was 170.5 MB in the beginning and 409.6 MB in the end (delta: -239.1 MB). Peak memory consumption was 293.0 MB. Max. memory is 8.0 GB. [2021-08-06 19:43:21,565 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 190.8 MB. Free memory was 171.8 MB in the beginning and 171.6 MB in the end (delta: 170.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 19:43:21,565 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.39 ms. Allocated memory is still 190.8 MB. Free memory was 170.4 MB in the beginning and 168.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 19:43:21,565 INFO L168 Benchmark]: Boogie Preprocessor took 25.44 ms. Allocated memory is still 190.8 MB. Free memory was 168.8 MB in the beginning and 167.9 MB in the end (delta: 884.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 19:43:21,565 INFO L168 Benchmark]: RCFGBuilder took 374.02 ms. Allocated memory is still 190.8 MB. Free memory was 167.8 MB in the beginning and 146.1 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-08-06 19:43:21,566 INFO L168 Benchmark]: TraceAbstraction took 49921.47 ms. Allocated memory was 190.8 MB in the beginning and 486.5 MB in the end (delta: 295.7 MB). Free memory was 145.6 MB in the beginning and 409.6 MB in the end (delta: -264.0 MB). Peak memory consumption was 267.8 MB. Max. memory is 8.0 GB. [2021-08-06 19:43:21,566 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 190.8 MB. Free memory was 171.8 MB in the beginning and 171.6 MB in the end (delta: 170.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.39 ms. Allocated memory is still 190.8 MB. Free memory was 170.4 MB in the beginning and 168.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.44 ms. Allocated memory is still 190.8 MB. Free memory was 168.8 MB in the beginning and 167.9 MB in the end (delta: 884.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 374.02 ms. Allocated memory is still 190.8 MB. Free memory was 167.8 MB in the beginning and 146.1 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 49921.47 ms. Allocated memory was 190.8 MB in the beginning and 486.5 MB in the end (delta: 295.7 MB). Free memory was 145.6 MB in the beginning and 409.6 MB in the end (delta: -264.0 MB). Peak memory consumption was 267.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 126, positive: 108, positive conditional: 108, positive unconditional: 0, negative: 18, negative conditional: 18, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 108, positive: 108, positive conditional: 0, positive unconditional: 108, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 45, positive: 45, positive conditional: 0, positive unconditional: 45, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 45, positive: 45, positive conditional: 0, positive unconditional: 45, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 108, positive: 63, positive conditional: 0, positive unconditional: 63, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 45, unknown conditional: 0, unknown unconditional: 45] , Statistics on independence cache: Total cache size (in pairs): 45, Positive cache size: 45, Positive conditional cache size: 0, Positive unconditional cache size: 45, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 18 - ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Alternating quantifiers not yet supported: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-08-06 19:43:21,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...