/usr/bin/java -Xmx16000000000 -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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:57:46,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:57:46,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:57:46,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:57:46,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 14:57:46,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 14:57:46,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 14:57:46,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 14:57:46,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 14:57:46,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 14:57:46,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 14:57:47,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 14:57:47,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 14:57:47,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 14:57:47,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 14:57:47,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 14:57:47,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 14:57:47,023 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-Separate.epf [2021-06-05 14:57:47,058 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:57:47,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:57:47,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:57:47,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:57:47,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:57:47,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:57:47,061 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:57:47,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:57:47,062 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:57:47,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:57:47,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:57:47,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:57:47,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:57:47,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:57:47,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:57:47,063 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:57:47,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:57:47,064 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:57:47,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:57:47,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:57:47,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:57:47,064 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:57:47,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:57:47,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:57:47,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:57:47,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:57:47,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:57:47,065 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:57:47,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:57:47,066 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:57:47,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:57:47,066 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:57:47,066 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:57:47,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:57:47,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:57:47,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:57:47,396 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:57:47,397 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:57:47,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl [2021-06-05 14:57:47,398 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl' [2021-06-05 14:57:47,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:57:47,605 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:57:47,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:57:47,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:57:47,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:57:47,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:57:47" (1/1) ... [2021-06-05 14:57:47,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:57:47" (1/1) ... [2021-06-05 14:57:47,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:57:47,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:57:47,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:57:47,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:57:47,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:57:47" (1/1) ... [2021-06-05 14:57:47,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:57:47" (1/1) ... [2021-06-05 14:57:47,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:57:47" (1/1) ... [2021-06-05 14:57:47,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:57:47" (1/1) ... [2021-06-05 14:57:47,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:57:47" (1/1) ... [2021-06-05 14:57:47,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:57:47" (1/1) ... [2021-06-05 14:57:47,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:57:47" (1/1) ... [2021-06-05 14:57:47,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:57:47,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:57:47,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:57:47,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:57:47,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:57:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:57:47,843 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:57:47,844 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:57:47,844 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:57:47,844 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:57:47,844 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:57:47,845 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:57:47,845 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:57:47,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:57:47,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:57:47,846 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 14:57:48,044 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:57:48,045 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 14:57:48,046 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:57:48 BoogieIcfgContainer [2021-06-05 14:57:48,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:57:48,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:57:48,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:57:48,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:57:48,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:57:47" (1/2) ... [2021-06-05 14:57:48,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d1557b and model type misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:57:48, skipping insertion in model container [2021-06-05 14:57:48,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:57:48" (2/2) ... [2021-06-05 14:57:48,060 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-2.wvr.bpl [2021-06-05 14:57:48,066 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:57:48,067 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:57:48,067 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:57:48,068 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:57:48,139 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 14:57:48,169 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 14:57:48,185 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:57:48,185 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:57:48,185 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:57:48,186 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:57:48,186 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:57:48,186 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:57:48,186 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:57:48,186 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:57:48,193 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 29 transitions, 74 flow [2021-06-05 14:57:48,207 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 87 states, 85 states have (on average 2.176470588235294) internal successors, (185), 86 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 85 states have (on average 2.176470588235294) internal successors, (185), 86 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:48,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 14:57:48,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:48,236 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:48,236 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:48,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:48,241 INFO L82 PathProgramCache]: Analyzing trace with hash -523912972, now seen corresponding path program 1 times [2021-06-05 14:57:48,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:48,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474825157] [2021-06-05 14:57:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:48,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:48,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474825157] [2021-06-05 14:57:48,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474825157] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:57:48,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:57:48,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 14:57:48,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740862385] [2021-06-05 14:57:48,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:57:48,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:48,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:57:48,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:57:48,443 INFO L87 Difference]: Start difference. First operand has 87 states, 85 states have (on average 2.176470588235294) internal successors, (185), 86 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:48,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:48,498 INFO L93 Difference]: Finished difference Result 134 states and 294 transitions. [2021-06-05 14:57:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:57:48,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-06-05 14:57:48,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:48,511 INFO L225 Difference]: With dead ends: 134 [2021-06-05 14:57:48,512 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 14:57:48,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:57:48,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 14:57:48,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2021-06-05 14:57:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.161290322580645) internal successors, (201), 93 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 201 transitions. [2021-06-05 14:57:48,568 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 201 transitions. Word has length 11 [2021-06-05 14:57:48,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:48,568 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 201 transitions. [2021-06-05 14:57:48,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:48,568 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 201 transitions. [2021-06-05 14:57:48,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:57:48,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:48,571 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:48,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:57:48,571 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:48,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:48,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1655401882, now seen corresponding path program 1 times [2021-06-05 14:57:48,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:48,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503882326] [2021-06-05 14:57:48,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:48,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:48,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503882326] [2021-06-05 14:57:48,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503882326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:48,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259263465] [2021-06-05 14:57:48,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:48,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 14:57:48,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:48,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259263465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:48,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:48,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 14:57:48,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65698249] [2021-06-05 14:57:48,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:57:48,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:48,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:57:48,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:57:48,769 INFO L87 Difference]: Start difference. First operand 94 states and 201 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:48,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:48,812 INFO L93 Difference]: Finished difference Result 169 states and 356 transitions. [2021-06-05 14:57:48,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:57:48,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-06-05 14:57:48,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:48,814 INFO L225 Difference]: With dead ends: 169 [2021-06-05 14:57:48,814 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 14:57:48,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:57:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 14:57:48,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-06-05 14:57:48,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.185567010309278) internal successors, (212), 97 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:48,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2021-06-05 14:57:48,824 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 16 [2021-06-05 14:57:48,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:48,824 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2021-06-05 14:57:48,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:48,829 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2021-06-05 14:57:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:57:48,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:48,830 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:49,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 14:57:49,031 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:49,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:49,032 INFO L82 PathProgramCache]: Analyzing trace with hash -965799907, now seen corresponding path program 1 times [2021-06-05 14:57:49,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:49,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121928040] [2021-06-05 14:57:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:49,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:49,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121928040] [2021-06-05 14:57:49,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121928040] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:57:49,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:57:49,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:57:49,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109720891] [2021-06-05 14:57:49,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:57:49,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:49,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:57:49,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:57:49,081 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:49,155 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2021-06-05 14:57:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:57:49,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-06-05 14:57:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:49,162 INFO L225 Difference]: With dead ends: 188 [2021-06-05 14:57:49,162 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 14:57:49,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:57:49,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 14:57:49,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 122. [2021-06-05 14:57:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1735537190082646) internal successors, (263), 121 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 263 transitions. [2021-06-05 14:57:49,177 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 263 transitions. Word has length 16 [2021-06-05 14:57:49,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:49,177 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 263 transitions. [2021-06-05 14:57:49,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 263 transitions. [2021-06-05 14:57:49,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:57:49,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:49,179 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:49,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 14:57:49,179 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:49,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:49,180 INFO L82 PathProgramCache]: Analyzing trace with hash 798457899, now seen corresponding path program 2 times [2021-06-05 14:57:49,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:49,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257702309] [2021-06-05 14:57:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:49,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:49,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257702309] [2021-06-05 14:57:49,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257702309] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:57:49,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:57:49,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:57:49,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280096735] [2021-06-05 14:57:49,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:57:49,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:49,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:57:49,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:57:49,227 INFO L87 Difference]: Start difference. First operand 122 states and 263 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:49,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:49,267 INFO L93 Difference]: Finished difference Result 156 states and 342 transitions. [2021-06-05 14:57:49,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:57:49,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-06-05 14:57:49,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:49,271 INFO L225 Difference]: With dead ends: 156 [2021-06-05 14:57:49,271 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 14:57:49,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:57:49,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 14:57:49,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 104. [2021-06-05 14:57:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.174757281553398) internal successors, (224), 103 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:49,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2021-06-05 14:57:49,286 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 16 [2021-06-05 14:57:49,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:49,286 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2021-06-05 14:57:49,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:49,287 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2021-06-05 14:57:49,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:57:49,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:49,288 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:49,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 14:57:49,288 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:49,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:49,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1004932738, now seen corresponding path program 2 times [2021-06-05 14:57:49,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:49,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082403748] [2021-06-05 14:57:49,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:49,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:49,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082403748] [2021-06-05 14:57:49,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082403748] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:57:49,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:57:49,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:57:49,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068779413] [2021-06-05 14:57:49,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:57:49,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:49,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:57:49,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:57:49,312 INFO L87 Difference]: Start difference. First operand 104 states and 224 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:49,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:49,342 INFO L93 Difference]: Finished difference Result 156 states and 340 transitions. [2021-06-05 14:57:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:57:49,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-06-05 14:57:49,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:49,344 INFO L225 Difference]: With dead ends: 156 [2021-06-05 14:57:49,344 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 14:57:49,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:57:49,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 14:57:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 104. [2021-06-05 14:57:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 223 transitions. [2021-06-05 14:57:49,349 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 223 transitions. Word has length 16 [2021-06-05 14:57:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:49,349 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 223 transitions. [2021-06-05 14:57:49,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 223 transitions. [2021-06-05 14:57:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:57:49,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:49,351 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:49,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 14:57:49,351 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:49,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:49,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1060614677, now seen corresponding path program 1 times [2021-06-05 14:57:49,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:49,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301592666] [2021-06-05 14:57:49,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:49,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:49,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301592666] [2021-06-05 14:57:49,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301592666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:49,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271103580] [2021-06-05 14:57:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:49,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:57:49,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:49,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271103580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:49,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:49,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 14:57:49,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328948268] [2021-06-05 14:57:49,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:57:49,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:49,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:57:49,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:57:49,659 INFO L87 Difference]: Start difference. First operand 104 states and 223 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:49,789 INFO L93 Difference]: Finished difference Result 226 states and 505 transitions. [2021-06-05 14:57:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:57:49,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 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 [2021-06-05 14:57:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:49,792 INFO L225 Difference]: With dead ends: 226 [2021-06-05 14:57:49,793 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 14:57:49,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:57:49,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 14:57:49,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 164. [2021-06-05 14:57:49,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.2024539877300615) internal successors, (359), 163 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:49,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 359 transitions. [2021-06-05 14:57:49,803 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 359 transitions. Word has length 21 [2021-06-05 14:57:49,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:49,803 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 359 transitions. [2021-06-05 14:57:49,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:49,803 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 359 transitions. [2021-06-05 14:57:49,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 14:57:49,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:49,808 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:50,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:50,021 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:50,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:50,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1348728101, now seen corresponding path program 2 times [2021-06-05 14:57:50,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:50,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270574834] [2021-06-05 14:57:50,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:50,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:50,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270574834] [2021-06-05 14:57:50,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270574834] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:57:50,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:57:50,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:57:50,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208354949] [2021-06-05 14:57:50,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:57:50,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:50,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:57:50,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:57:50,052 INFO L87 Difference]: Start difference. First operand 164 states and 359 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:50,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:50,063 INFO L93 Difference]: Finished difference Result 266 states and 560 transitions. [2021-06-05 14:57:50,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:57:50,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 14:57:50,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:50,064 INFO L225 Difference]: With dead ends: 266 [2021-06-05 14:57:50,064 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 14:57:50,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:57:50,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 14:57:50,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2021-06-05 14:57:50,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.171673819742489) internal successors, (506), 233 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:50,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 506 transitions. [2021-06-05 14:57:50,073 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 506 transitions. Word has length 26 [2021-06-05 14:57:50,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:50,074 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 506 transitions. [2021-06-05 14:57:50,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 506 transitions. [2021-06-05 14:57:50,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 14:57:50,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:50,075 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:50,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 14:57:50,075 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:50,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:50,076 INFO L82 PathProgramCache]: Analyzing trace with hash -505952581, now seen corresponding path program 1 times [2021-06-05 14:57:50,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:50,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809638848] [2021-06-05 14:57:50,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:50,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:50,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809638848] [2021-06-05 14:57:50,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809638848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:50,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260323396] [2021-06-05 14:57:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:50,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:57:50,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:50,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260323396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:50,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:50,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 14:57:50,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587787106] [2021-06-05 14:57:50,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:50,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:50,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:50,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:50,229 INFO L87 Difference]: Start difference. First operand 234 states and 506 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-06-05 14:57:50,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:50,287 INFO L93 Difference]: Finished difference Result 562 states and 1200 transitions. [2021-06-05 14:57:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:57:50,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 14:57:50,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:50,290 INFO L225 Difference]: With dead ends: 562 [2021-06-05 14:57:50,290 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 14:57:50,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:57:50,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 14:57:50,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 438. [2021-06-05 14:57:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.265446224256293) internal successors, (990), 437 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:50,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 990 transitions. [2021-06-05 14:57:50,303 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 990 transitions. Word has length 26 [2021-06-05 14:57:50,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:50,303 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 990 transitions. [2021-06-05 14:57:50,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-06-05 14:57:50,304 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 990 transitions. [2021-06-05 14:57:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 14:57:50,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:50,305 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:50,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:50,528 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:50,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:50,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1335579773, now seen corresponding path program 2 times [2021-06-05 14:57:50,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:50,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328702265] [2021-06-05 14:57:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:50,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:50,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328702265] [2021-06-05 14:57:50,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328702265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:50,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751154157] [2021-06-05 14:57:50,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:50,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:50,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:50,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:57:50,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:50,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751154157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:50,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:50,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 14:57:50,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443303769] [2021-06-05 14:57:50,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:57:50,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:50,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:57:50,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:57:50,649 INFO L87 Difference]: Start difference. First operand 438 states and 990 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:50,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:50,712 INFO L93 Difference]: Finished difference Result 491 states and 1077 transitions. [2021-06-05 14:57:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:57:50,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 14:57:50,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:50,714 INFO L225 Difference]: With dead ends: 491 [2021-06-05 14:57:50,714 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 14:57:50,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:57:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 14:57:50,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 440. [2021-06-05 14:57:50,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.2574031890660593) internal successors, (991), 439 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:50,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 991 transitions. [2021-06-05 14:57:50,725 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 991 transitions. Word has length 26 [2021-06-05 14:57:50,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:50,726 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 991 transitions. [2021-06-05 14:57:50,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:50,726 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 991 transitions. [2021-06-05 14:57:50,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 14:57:50,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:50,727 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:50,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:50,946 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:50,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:50,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1641841895, now seen corresponding path program 3 times [2021-06-05 14:57:50,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:50,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744445559] [2021-06-05 14:57:50,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:50,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:50,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744445559] [2021-06-05 14:57:50,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744445559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:50,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170990677] [2021-06-05 14:57:50,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:51,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:57:51,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:51,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:57:51,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:51,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170990677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:51,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:51,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 14:57:51,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400500756] [2021-06-05 14:57:51,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:57:51,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:51,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:57:51,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:57:51,091 INFO L87 Difference]: Start difference. First operand 440 states and 991 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:51,154 INFO L93 Difference]: Finished difference Result 771 states and 1695 transitions. [2021-06-05 14:57:51,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:57:51,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 14:57:51,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:51,158 INFO L225 Difference]: With dead ends: 771 [2021-06-05 14:57:51,158 INFO L226 Difference]: Without dead ends: 771 [2021-06-05 14:57:51,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:57:51,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-06-05 14:57:51,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 634. [2021-06-05 14:57:51,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.3175355450236967) internal successors, (1467), 633 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1467 transitions. [2021-06-05 14:57:51,194 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1467 transitions. Word has length 26 [2021-06-05 14:57:51,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:51,194 INFO L482 AbstractCegarLoop]: Abstraction has 634 states and 1467 transitions. [2021-06-05 14:57:51,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:51,195 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1467 transitions. [2021-06-05 14:57:51,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 14:57:51,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:51,196 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:51,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 14:57:51,417 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:51,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:51,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1483069401, now seen corresponding path program 4 times [2021-06-05 14:57:51,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:51,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394618495] [2021-06-05 14:57:51,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:51,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:51,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394618495] [2021-06-05 14:57:51,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394618495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:51,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580081164] [2021-06-05 14:57:51,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:51,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:51,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:51,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:57:51,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:51,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580081164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:51,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:51,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 14:57:51,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878721217] [2021-06-05 14:57:51,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:57:51,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:51,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:57:51,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:57:51,527 INFO L87 Difference]: Start difference. First operand 634 states and 1467 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:51,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:51,577 INFO L93 Difference]: Finished difference Result 763 states and 1678 transitions. [2021-06-05 14:57:51,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:57:51,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 14:57:51,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:51,581 INFO L225 Difference]: With dead ends: 763 [2021-06-05 14:57:51,581 INFO L226 Difference]: Without dead ends: 759 [2021-06-05 14:57:51,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:57:51,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-06-05 14:57:51,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 634. [2021-06-05 14:57:51,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.3143759873617693) internal successors, (1465), 633 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:51,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1465 transitions. [2021-06-05 14:57:51,596 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1465 transitions. Word has length 26 [2021-06-05 14:57:51,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:51,596 INFO L482 AbstractCegarLoop]: Abstraction has 634 states and 1465 transitions. [2021-06-05 14:57:51,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:51,596 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1465 transitions. [2021-06-05 14:57:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 14:57:51,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:51,598 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:51,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:51,817 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:51,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:51,817 INFO L82 PathProgramCache]: Analyzing trace with hash 275158029, now seen corresponding path program 5 times [2021-06-05 14:57:51,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:51,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783003029] [2021-06-05 14:57:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:51,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:51,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783003029] [2021-06-05 14:57:51,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783003029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:51,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809231932] [2021-06-05 14:57:51,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:51,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:57:51,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:51,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:57:51,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:51,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:51,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809231932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:51,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:51,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 14:57:51,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962863079] [2021-06-05 14:57:51,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:51,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:51,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:51,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:51,937 INFO L87 Difference]: Start difference. First operand 634 states and 1465 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-06-05 14:57:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:52,013 INFO L93 Difference]: Finished difference Result 741 states and 1639 transitions. [2021-06-05 14:57:52,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:57:52,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 14:57:52,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:52,017 INFO L225 Difference]: With dead ends: 741 [2021-06-05 14:57:52,017 INFO L226 Difference]: Without dead ends: 721 [2021-06-05 14:57:52,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:57:52,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-05 14:57:52,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 654. [2021-06-05 14:57:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.2833078101071975) internal successors, (1491), 653 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1491 transitions. [2021-06-05 14:57:52,036 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1491 transitions. Word has length 26 [2021-06-05 14:57:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:52,036 INFO L482 AbstractCegarLoop]: Abstraction has 654 states and 1491 transitions. [2021-06-05 14:57:52,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-06-05 14:57:52,037 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1491 transitions. [2021-06-05 14:57:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:57:52,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:52,038 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:52,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:52,253 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:52,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:52,253 INFO L82 PathProgramCache]: Analyzing trace with hash 590448310, now seen corresponding path program 6 times [2021-06-05 14:57:52,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:52,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104025481] [2021-06-05 14:57:52,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:57:52,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:52,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104025481] [2021-06-05 14:57:52,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104025481] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:57:52,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:57:52,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:57:52,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016491576] [2021-06-05 14:57:52,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:57:52,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:52,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:57:52,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:57:52,289 INFO L87 Difference]: Start difference. First operand 654 states and 1491 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:52,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:52,305 INFO L93 Difference]: Finished difference Result 1106 states and 2391 transitions. [2021-06-05 14:57:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:57:52,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 14:57:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:52,309 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 14:57:52,309 INFO L226 Difference]: Without dead ends: 1106 [2021-06-05 14:57:52,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:57:52,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-05 14:57:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1035. [2021-06-05 14:57:52,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 2.2030947775628626) internal successors, (2278), 1034 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 2278 transitions. [2021-06-05 14:57:52,331 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 2278 transitions. Word has length 31 [2021-06-05 14:57:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:52,331 INFO L482 AbstractCegarLoop]: Abstraction has 1035 states and 2278 transitions. [2021-06-05 14:57:52,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:52,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 2278 transitions. [2021-06-05 14:57:52,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:57:52,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:52,334 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:52,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 14:57:52,334 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:52,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:52,335 INFO L82 PathProgramCache]: Analyzing trace with hash 655092438, now seen corresponding path program 1 times [2021-06-05 14:57:52,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:52,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683838747] [2021-06-05 14:57:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:57:52,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:52,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683838747] [2021-06-05 14:57:52,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683838747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:52,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219939314] [2021-06-05 14:57:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:52,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:57:52,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:57:52,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219939314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:52,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:52,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 14:57:52,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209040498] [2021-06-05 14:57:52,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:57:52,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:52,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:57:52,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:57:52,488 INFO L87 Difference]: Start difference. First operand 1035 states and 2278 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-06-05 14:57:52,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:52,527 INFO L93 Difference]: Finished difference Result 1734 states and 3766 transitions. [2021-06-05 14:57:52,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:57:52,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) Word has length 31 [2021-06-05 14:57:52,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:52,534 INFO L225 Difference]: With dead ends: 1734 [2021-06-05 14:57:52,534 INFO L226 Difference]: Without dead ends: 1715 [2021-06-05 14:57:52,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:57:52,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-06-05 14:57:52,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1571. [2021-06-05 14:57:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.212738853503185) internal successors, (3474), 1570 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3474 transitions. [2021-06-05 14:57:52,570 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3474 transitions. Word has length 31 [2021-06-05 14:57:52,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:52,570 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3474 transitions. [2021-06-05 14:57:52,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-06-05 14:57:52,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3474 transitions. [2021-06-05 14:57:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:57:52,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:52,573 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:52,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 14:57:52,791 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:52,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:52,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1389409942, now seen corresponding path program 2 times [2021-06-05 14:57:52,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:52,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781544364] [2021-06-05 14:57:52,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:57:52,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:52,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781544364] [2021-06-05 14:57:52,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781544364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:52,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381433690] [2021-06-05 14:57:52,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:52,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:52,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:52,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:57:52,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:57:52,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381433690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:52,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:52,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 14:57:52,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723835985] [2021-06-05 14:57:52,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:57:52,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:52,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:57:52,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:57:52,933 INFO L87 Difference]: Start difference. First operand 1571 states and 3474 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-06-05 14:57:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:52,991 INFO L93 Difference]: Finished difference Result 2696 states and 5884 transitions. [2021-06-05 14:57:52,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:57:52,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) Word has length 31 [2021-06-05 14:57:52,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:53,001 INFO L225 Difference]: With dead ends: 2696 [2021-06-05 14:57:53,001 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 14:57:53,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:57:53,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 14:57:53,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2412. [2021-06-05 14:57:53,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.2310244711737868) internal successors, (5379), 2411 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 5379 transitions. [2021-06-05 14:57:53,060 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 5379 transitions. Word has length 31 [2021-06-05 14:57:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:53,061 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 5379 transitions. [2021-06-05 14:57:53,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-06-05 14:57:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 5379 transitions. [2021-06-05 14:57:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:57:53,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:53,065 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:53,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 14:57:53,274 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:53,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1015199406, now seen corresponding path program 3 times [2021-06-05 14:57:53,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:53,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864705714] [2021-06-05 14:57:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:53,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:53,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864705714] [2021-06-05 14:57:53,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864705714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:53,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725846666] [2021-06-05 14:57:53,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:53,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:57:53,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:53,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:57:53,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:53,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725846666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:53,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:53,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 14:57:53,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797492635] [2021-06-05 14:57:53,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:53,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:53,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:53,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:53,455 INFO L87 Difference]: Start difference. First operand 2412 states and 5379 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-06-05 14:57:53,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:53,529 INFO L93 Difference]: Finished difference Result 4261 states and 9366 transitions. [2021-06-05 14:57:53,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:57:53,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) Word has length 31 [2021-06-05 14:57:53,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:53,545 INFO L225 Difference]: With dead ends: 4261 [2021-06-05 14:57:53,545 INFO L226 Difference]: Without dead ends: 4236 [2021-06-05 14:57:53,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:53,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2021-06-05 14:57:53,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 3410. [2021-06-05 14:57:53,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3409 states have (on average 2.24435318275154) internal successors, (7651), 3409 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 7651 transitions. [2021-06-05 14:57:53,635 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 7651 transitions. Word has length 31 [2021-06-05 14:57:53,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:53,636 INFO L482 AbstractCegarLoop]: Abstraction has 3410 states and 7651 transitions. [2021-06-05 14:57:53,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-06-05 14:57:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 7651 transitions. [2021-06-05 14:57:53,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:57:53,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:53,642 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:53,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 14:57:53,857 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:53,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:53,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2091115922, now seen corresponding path program 4 times [2021-06-05 14:57:53,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:53,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790010842] [2021-06-05 14:57:53,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:53,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:53,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790010842] [2021-06-05 14:57:53,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790010842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:53,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135079689] [2021-06-05 14:57:53,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:53,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:53,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:53,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:57:53,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:54,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135079689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:54,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:54,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 14:57:54,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887495506] [2021-06-05 14:57:54,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:54,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:54,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:54,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:54,022 INFO L87 Difference]: Start difference. First operand 3410 states and 7651 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-06-05 14:57:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:54,079 INFO L93 Difference]: Finished difference Result 4354 states and 9576 transitions. [2021-06-05 14:57:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:57:54,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) Word has length 31 [2021-06-05 14:57:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:54,095 INFO L225 Difference]: With dead ends: 4354 [2021-06-05 14:57:54,095 INFO L226 Difference]: Without dead ends: 4335 [2021-06-05 14:57:54,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:54,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-06-05 14:57:54,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 3543. [2021-06-05 14:57:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 2.2478825522303785) internal successors, (7962), 3542 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 7962 transitions. [2021-06-05 14:57:54,174 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 7962 transitions. Word has length 31 [2021-06-05 14:57:54,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:54,174 INFO L482 AbstractCegarLoop]: Abstraction has 3543 states and 7962 transitions. [2021-06-05 14:57:54,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-06-05 14:57:54,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 7962 transitions. [2021-06-05 14:57:54,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:57:54,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:54,180 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:54,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 14:57:54,403 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:54,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:54,404 INFO L82 PathProgramCache]: Analyzing trace with hash 702036756, now seen corresponding path program 5 times [2021-06-05 14:57:54,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:54,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387591471] [2021-06-05 14:57:54,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:57:54,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:54,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387591471] [2021-06-05 14:57:54,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387591471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:54,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229189944] [2021-06-05 14:57:54,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:54,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:57:54,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:54,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:57:54,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:57:54,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229189944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:54,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:54,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 14:57:54,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035427846] [2021-06-05 14:57:54,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:57:54,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:54,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:57:54,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:57:54,533 INFO L87 Difference]: Start difference. First operand 3543 states and 7962 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-06-05 14:57:54,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:54,574 INFO L93 Difference]: Finished difference Result 4170 states and 9274 transitions. [2021-06-05 14:57:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:57:54,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) Word has length 31 [2021-06-05 14:57:54,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:54,587 INFO L225 Difference]: With dead ends: 4170 [2021-06-05 14:57:54,587 INFO L226 Difference]: Without dead ends: 4151 [2021-06-05 14:57:54,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:57:54,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-05 14:57:54,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3929. [2021-06-05 14:57:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3928 states have (on average 2.253818737270876) internal successors, (8853), 3928 states have internal predecessors, (8853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:54,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 8853 transitions. [2021-06-05 14:57:54,696 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 8853 transitions. Word has length 31 [2021-06-05 14:57:54,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:54,696 INFO L482 AbstractCegarLoop]: Abstraction has 3929 states and 8853 transitions. [2021-06-05 14:57:54,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-06-05 14:57:54,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 8853 transitions. [2021-06-05 14:57:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:57:54,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:54,702 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:54,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 14:57:54,926 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:54,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:54,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1049711310, now seen corresponding path program 6 times [2021-06-05 14:57:54,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:54,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730072335] [2021-06-05 14:57:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:54,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:54,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730072335] [2021-06-05 14:57:54,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730072335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:54,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684834173] [2021-06-05 14:57:54,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:55,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:57:55,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:55,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:57:55,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:55,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684834173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:55,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:55,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 14:57:55,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322367638] [2021-06-05 14:57:55,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:55,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:55,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:55,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:55,078 INFO L87 Difference]: Start difference. First operand 3929 states and 8853 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-06-05 14:57:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:55,139 INFO L93 Difference]: Finished difference Result 5348 states and 11836 transitions. [2021-06-05 14:57:55,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:57:55,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) Word has length 31 [2021-06-05 14:57:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:55,150 INFO L225 Difference]: With dead ends: 5348 [2021-06-05 14:57:55,150 INFO L226 Difference]: Without dead ends: 5329 [2021-06-05 14:57:55,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-06-05 14:57:55,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 4092. [2021-06-05 14:57:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4092 states, 4091 states have (on average 2.2561720850647764) internal successors, (9230), 4091 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4092 states to 4092 states and 9230 transitions. [2021-06-05 14:57:55,236 INFO L78 Accepts]: Start accepts. Automaton has 4092 states and 9230 transitions. Word has length 31 [2021-06-05 14:57:55,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:55,236 INFO L482 AbstractCegarLoop]: Abstraction has 4092 states and 9230 transitions. [2021-06-05 14:57:55,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-06-05 14:57:55,236 INFO L276 IsEmpty]: Start isEmpty. Operand 4092 states and 9230 transitions. [2021-06-05 14:57:55,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:57:55,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:55,243 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:55,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:55,457 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:55,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:55,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2056604018, now seen corresponding path program 7 times [2021-06-05 14:57:55,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:55,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475271247] [2021-06-05 14:57:55,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:55,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:55,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475271247] [2021-06-05 14:57:55,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475271247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:55,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94714290] [2021-06-05 14:57:55,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:55,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:57:55,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:55,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94714290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:55,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:55,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 14:57:55,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72329791] [2021-06-05 14:57:55,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:55,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:55,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:55,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:55,598 INFO L87 Difference]: Start difference. First operand 4092 states and 9230 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-06-05 14:57:55,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:55,660 INFO L93 Difference]: Finished difference Result 5419 states and 11952 transitions. [2021-06-05 14:57:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:57:55,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) Word has length 31 [2021-06-05 14:57:55,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:55,672 INFO L225 Difference]: With dead ends: 5419 [2021-06-05 14:57:55,672 INFO L226 Difference]: Without dead ends: 5400 [2021-06-05 14:57:55,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2021-06-05 14:57:55,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 2885. [2021-06-05 14:57:55,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 2884 states have (on average 2.235090152565881) internal successors, (6446), 2884 states have internal predecessors, (6446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 6446 transitions. [2021-06-05 14:57:55,736 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 6446 transitions. Word has length 31 [2021-06-05 14:57:55,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:55,736 INFO L482 AbstractCegarLoop]: Abstraction has 2885 states and 6446 transitions. [2021-06-05 14:57:55,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-06-05 14:57:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 6446 transitions. [2021-06-05 14:57:55,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:57:55,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:55,742 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:55,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:55,965 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:55,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:55,965 INFO L82 PathProgramCache]: Analyzing trace with hash 467136390, now seen corresponding path program 8 times [2021-06-05 14:57:55,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:55,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085091360] [2021-06-05 14:57:55,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:56,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:56,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085091360] [2021-06-05 14:57:56,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085091360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:56,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129334917] [2021-06-05 14:57:56,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:56,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:56,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:56,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:57:56,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:56,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129334917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:56,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:56,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:57:56,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888169430] [2021-06-05 14:57:56,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:57:56,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:56,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:57:56,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:57:56,108 INFO L87 Difference]: Start difference. First operand 2885 states and 6446 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-06-05 14:57:56,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:56,228 INFO L93 Difference]: Finished difference Result 5635 states and 12327 transitions. [2021-06-05 14:57:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:57:56,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 36 [2021-06-05 14:57:56,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:56,237 INFO L225 Difference]: With dead ends: 5635 [2021-06-05 14:57:56,237 INFO L226 Difference]: Without dead ends: 5635 [2021-06-05 14:57:56,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:57:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5635 states. [2021-06-05 14:57:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5635 to 3879. [2021-06-05 14:57:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3879 states, 3878 states have (on average 2.2439401753481176) internal successors, (8702), 3878 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:56,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 8702 transitions. [2021-06-05 14:57:56,341 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 8702 transitions. Word has length 36 [2021-06-05 14:57:56,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:56,342 INFO L482 AbstractCegarLoop]: Abstraction has 3879 states and 8702 transitions. [2021-06-05 14:57:56,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-06-05 14:57:56,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 8702 transitions. [2021-06-05 14:57:56,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:57:56,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:56,349 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:56,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 14:57:56,572 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:56,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1694057605, now seen corresponding path program 9 times [2021-06-05 14:57:56,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:56,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036996802] [2021-06-05 14:57:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:56,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:56,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036996802] [2021-06-05 14:57:56,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036996802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:56,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688852578] [2021-06-05 14:57:56,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:56,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:57:56,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:56,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:57:56,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:56,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688852578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:56,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:56,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:57:56,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889816491] [2021-06-05 14:57:56,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:57:56,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:56,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:57:56,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:57:56,722 INFO L87 Difference]: Start difference. First operand 3879 states and 8702 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-06-05 14:57:56,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:56,841 INFO L93 Difference]: Finished difference Result 7170 states and 15945 transitions. [2021-06-05 14:57:56,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:57:56,842 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 36 [2021-06-05 14:57:56,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:56,854 INFO L225 Difference]: With dead ends: 7170 [2021-06-05 14:57:56,854 INFO L226 Difference]: Without dead ends: 7072 [2021-06-05 14:57:56,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:57:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7072 states. [2021-06-05 14:57:56,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7072 to 6656. [2021-06-05 14:57:56,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 6655 states have (on average 2.251089406461307) internal successors, (14981), 6655 states have internal predecessors, (14981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 14981 transitions. [2021-06-05 14:57:56,967 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 14981 transitions. Word has length 36 [2021-06-05 14:57:56,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:56,967 INFO L482 AbstractCegarLoop]: Abstraction has 6656 states and 14981 transitions. [2021-06-05 14:57:56,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-06-05 14:57:56,967 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 14981 transitions. [2021-06-05 14:57:56,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:57:56,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:56,975 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:57,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:57,198 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:57,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:57,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1866861137, now seen corresponding path program 10 times [2021-06-05 14:57:57,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:57,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989268257] [2021-06-05 14:57:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:57,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:57,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989268257] [2021-06-05 14:57:57,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989268257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:57,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173482071] [2021-06-05 14:57:57,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:57,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:57,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:57,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:57:57,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:57,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173482071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:57,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:57,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 14:57:57,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414271885] [2021-06-05 14:57:57,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:57,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:57,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:57,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:57,328 INFO L87 Difference]: Start difference. First operand 6656 states and 14981 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-05 14:57:57,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:57,406 INFO L93 Difference]: Finished difference Result 6984 states and 15407 transitions. [2021-06-05 14:57:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:57:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-06-05 14:57:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:57,418 INFO L225 Difference]: With dead ends: 6984 [2021-06-05 14:57:57,418 INFO L226 Difference]: Without dead ends: 6984 [2021-06-05 14:57:57,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:57:57,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6984 states. [2021-06-05 14:57:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6984 to 6596. [2021-06-05 14:57:57,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.234571645185747) internal successors, (14737), 6595 states have internal predecessors, (14737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 14737 transitions. [2021-06-05 14:57:57,527 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 14737 transitions. Word has length 36 [2021-06-05 14:57:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:57,527 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 14737 transitions. [2021-06-05 14:57:57,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-05 14:57:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 14737 transitions. [2021-06-05 14:57:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:57:57,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:57,535 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:57,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 14:57:57,749 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:57,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:57,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1660386298, now seen corresponding path program 11 times [2021-06-05 14:57:57,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:57,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922428042] [2021-06-05 14:57:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:57,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:57,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922428042] [2021-06-05 14:57:57,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922428042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:57,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230706049] [2021-06-05 14:57:57,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:57,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:57:57,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:57,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:57:57,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:57,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230706049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:57,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:57,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 14:57:57,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796493556] [2021-06-05 14:57:57,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:57,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:57,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:57,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:57,937 INFO L87 Difference]: Start difference. First operand 6596 states and 14737 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-05 14:57:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:58,028 INFO L93 Difference]: Finished difference Result 7018 states and 15447 transitions. [2021-06-05 14:57:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:57:58,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-06-05 14:57:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:58,040 INFO L225 Difference]: With dead ends: 7018 [2021-06-05 14:57:58,040 INFO L226 Difference]: Without dead ends: 7014 [2021-06-05 14:57:58,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:57:58,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2021-06-05 14:57:58,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 6152. [2021-06-05 14:57:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6152 states, 6151 states have (on average 2.238497805234921) internal successors, (13769), 6151 states have internal predecessors, (13769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:58,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6152 states to 6152 states and 13769 transitions. [2021-06-05 14:57:58,146 INFO L78 Accepts]: Start accepts. Automaton has 6152 states and 13769 transitions. Word has length 36 [2021-06-05 14:57:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:58,146 INFO L482 AbstractCegarLoop]: Abstraction has 6152 states and 13769 transitions. [2021-06-05 14:57:58,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-05 14:57:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 6152 states and 13769 transitions. [2021-06-05 14:57:58,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:57:58,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:58,153 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:58,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 14:57:58,376 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:58,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:58,376 INFO L82 PathProgramCache]: Analyzing trace with hash -542761274, now seen corresponding path program 12 times [2021-06-05 14:57:58,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:58,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316099260] [2021-06-05 14:57:58,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:58,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:58,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316099260] [2021-06-05 14:57:58,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316099260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:58,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543478116] [2021-06-05 14:57:58,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:58,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:57:58,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:58,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:57:58,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:58,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543478116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:58,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:58,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 14:57:58,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847583775] [2021-06-05 14:57:58,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:58,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:58,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:58,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:58,521 INFO L87 Difference]: Start difference. First operand 6152 states and 13769 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-05 14:57:58,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:58,599 INFO L93 Difference]: Finished difference Result 9612 states and 21128 transitions. [2021-06-05 14:57:58,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:57:58,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-06-05 14:57:58,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:58,615 INFO L225 Difference]: With dead ends: 9612 [2021-06-05 14:57:58,616 INFO L226 Difference]: Without dead ends: 9612 [2021-06-05 14:57:58,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:57:58,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9612 states. [2021-06-05 14:57:58,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9612 to 8560. [2021-06-05 14:57:58,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8560 states, 8559 states have (on average 2.2475756513611405) internal successors, (19237), 8559 states have internal predecessors, (19237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8560 states to 8560 states and 19237 transitions. [2021-06-05 14:57:58,799 INFO L78 Accepts]: Start accepts. Automaton has 8560 states and 19237 transitions. Word has length 36 [2021-06-05 14:57:58,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:58,800 INFO L482 AbstractCegarLoop]: Abstraction has 8560 states and 19237 transitions. [2021-06-05 14:57:58,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-05 14:57:58,802 INFO L276 IsEmpty]: Start isEmpty. Operand 8560 states and 19237 transitions. [2021-06-05 14:57:58,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:57:58,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:58,810 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:59,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 14:57:59,033 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:59,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:59,034 INFO L82 PathProgramCache]: Analyzing trace with hash 452193595, now seen corresponding path program 13 times [2021-06-05 14:57:59,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:59,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768310502] [2021-06-05 14:57:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:59,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:59,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768310502] [2021-06-05 14:57:59,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768310502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:59,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113724985] [2021-06-05 14:57:59,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:59,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:57:59,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:59,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113724985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:59,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:59,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 14:57:59,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676282370] [2021-06-05 14:57:59,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:59,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:59,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:59,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:59,165 INFO L87 Difference]: Start difference. First operand 8560 states and 19237 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-05 14:57:59,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:59,261 INFO L93 Difference]: Finished difference Result 10199 states and 22770 transitions. [2021-06-05 14:57:59,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:57:59,262 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-06-05 14:57:59,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:59,276 INFO L225 Difference]: With dead ends: 10199 [2021-06-05 14:57:59,276 INFO L226 Difference]: Without dead ends: 10193 [2021-06-05 14:57:59,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:57:59,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10193 states. [2021-06-05 14:57:59,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10193 to 9772. [2021-06-05 14:57:59,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9772 states, 9771 states have (on average 2.2569849554805037) internal successors, (22053), 9771 states have internal predecessors, (22053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:59,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 22053 transitions. [2021-06-05 14:57:59,452 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 22053 transitions. Word has length 36 [2021-06-05 14:57:59,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:59,452 INFO L482 AbstractCegarLoop]: Abstraction has 9772 states and 22053 transitions. [2021-06-05 14:57:59,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-05 14:57:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 22053 transitions. [2021-06-05 14:57:59,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:57:59,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:59,460 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:59,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 14:57:59,682 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:59,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:59,682 INFO L82 PathProgramCache]: Analyzing trace with hash 756919215, now seen corresponding path program 14 times [2021-06-05 14:57:59,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:59,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965406983] [2021-06-05 14:57:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:59,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:59,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965406983] [2021-06-05 14:57:59,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965406983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:59,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706693246] [2021-06-05 14:57:59,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:59,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:59,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:59,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:57:59,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:59,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706693246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:59,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:59,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 14:57:59,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111060667] [2021-06-05 14:57:59,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:57:59,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:59,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:57:59,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:57:59,803 INFO L87 Difference]: Start difference. First operand 9772 states and 22053 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-05 14:57:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:59,886 INFO L93 Difference]: Finished difference Result 10439 states and 23230 transitions. [2021-06-05 14:57:59,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:57:59,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-06-05 14:57:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:59,896 INFO L225 Difference]: With dead ends: 10439 [2021-06-05 14:57:59,896 INFO L226 Difference]: Without dead ends: 10437 [2021-06-05 14:57:59,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:57:59,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10437 states. [2021-06-05 14:58:00,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10437 to 9840. [2021-06-05 14:58:00,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9840 states, 9839 states have (on average 2.252363045024901) internal successors, (22161), 9839 states have internal predecessors, (22161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9840 states to 9840 states and 22161 transitions. [2021-06-05 14:58:00,163 INFO L78 Accepts]: Start accepts. Automaton has 9840 states and 22161 transitions. Word has length 36 [2021-06-05 14:58:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:00,163 INFO L482 AbstractCegarLoop]: Abstraction has 9840 states and 22161 transitions. [2021-06-05 14:58:00,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-05 14:58:00,163 INFO L276 IsEmpty]: Start isEmpty. Operand 9840 states and 22161 transitions. [2021-06-05 14:58:00,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:58:00,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:00,171 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:00,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 14:58:00,393 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:00,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:00,393 INFO L82 PathProgramCache]: Analyzing trace with hash 963394054, now seen corresponding path program 15 times [2021-06-05 14:58:00,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:00,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149677268] [2021-06-05 14:58:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:00,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:00,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149677268] [2021-06-05 14:58:00,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149677268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:00,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849471356] [2021-06-05 14:58:00,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:00,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:58:00,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:00,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:58:00,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:58:00,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849471356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:00,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:00,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-06-05 14:58:00,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422825741] [2021-06-05 14:58:00,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:58:00,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:00,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:58:00,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:58:00,579 INFO L87 Difference]: Start difference. First operand 9840 states and 22161 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:00,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:00,992 INFO L93 Difference]: Finished difference Result 16933 states and 36602 transitions. [2021-06-05 14:58:00,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:58:00,992 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 14:58:00,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:01,013 INFO L225 Difference]: With dead ends: 16933 [2021-06-05 14:58:01,013 INFO L226 Difference]: Without dead ends: 16887 [2021-06-05 14:58:01,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:58:01,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16887 states. [2021-06-05 14:58:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16887 to 11694. [2021-06-05 14:58:01,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11694 states, 11693 states have (on average 2.213033438809544) internal successors, (25877), 11693 states have internal predecessors, (25877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:01,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11694 states to 11694 states and 25877 transitions. [2021-06-05 14:58:01,205 INFO L78 Accepts]: Start accepts. Automaton has 11694 states and 25877 transitions. Word has length 36 [2021-06-05 14:58:01,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:01,206 INFO L482 AbstractCegarLoop]: Abstraction has 11694 states and 25877 transitions. [2021-06-05 14:58:01,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:01,206 INFO L276 IsEmpty]: Start isEmpty. Operand 11694 states and 25877 transitions. [2021-06-05 14:58:01,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:58:01,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:01,212 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:01,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:01,422 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:01,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:01,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1147123141, now seen corresponding path program 16 times [2021-06-05 14:58:01,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:01,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354272224] [2021-06-05 14:58:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:01,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:01,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354272224] [2021-06-05 14:58:01,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354272224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:01,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254667447] [2021-06-05 14:58:01,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:01,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:01,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:01,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:58:01,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:01,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254667447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:01,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:01,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 14:58:01,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901024302] [2021-06-05 14:58:01,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:58:01,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:01,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:58:01,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:58:01,622 INFO L87 Difference]: Start difference. First operand 11694 states and 25877 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-06-05 14:58:01,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:01,726 INFO L93 Difference]: Finished difference Result 12577 states and 27332 transitions. [2021-06-05 14:58:01,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:58:01,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 36 [2021-06-05 14:58:01,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:01,737 INFO L225 Difference]: With dead ends: 12577 [2021-06-05 14:58:01,738 INFO L226 Difference]: Without dead ends: 12575 [2021-06-05 14:58:01,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:58:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12575 states. [2021-06-05 14:58:01,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12575 to 11238. [2021-06-05 14:58:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11238 states, 11237 states have (on average 2.20352407226128) internal successors, (24761), 11237 states have internal predecessors, (24761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:01,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11238 states to 11238 states and 24761 transitions. [2021-06-05 14:58:01,907 INFO L78 Accepts]: Start accepts. Automaton has 11238 states and 24761 transitions. Word has length 36 [2021-06-05 14:58:01,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:01,908 INFO L482 AbstractCegarLoop]: Abstraction has 11238 states and 24761 transitions. [2021-06-05 14:58:01,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-06-05 14:58:01,908 INFO L276 IsEmpty]: Start isEmpty. Operand 11238 states and 24761 transitions. [2021-06-05 14:58:01,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:58:01,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:01,984 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:02,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 14:58:02,185 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:02,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:02,185 INFO L82 PathProgramCache]: Analyzing trace with hash 973386407, now seen corresponding path program 17 times [2021-06-05 14:58:02,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:02,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768391291] [2021-06-05 14:58:02,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:58:02,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:02,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768391291] [2021-06-05 14:58:02,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768391291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:02,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760353976] [2021-06-05 14:58:02,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:02,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:58:02,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:02,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:58:02,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:58:02,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760353976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:02,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:02,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 14:58:02,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106478013] [2021-06-05 14:58:02,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:58:02,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:02,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:58:02,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:58:02,313 INFO L87 Difference]: Start difference. First operand 11238 states and 24761 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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) [2021-06-05 14:58:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:02,422 INFO L93 Difference]: Finished difference Result 11745 states and 25558 transitions. [2021-06-05 14:58:02,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:58:02,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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 36 [2021-06-05 14:58:02,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:02,437 INFO L225 Difference]: With dead ends: 11745 [2021-06-05 14:58:02,437 INFO L226 Difference]: Without dead ends: 11709 [2021-06-05 14:58:02,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:58:02,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11709 states. [2021-06-05 14:58:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11709 to 11232. [2021-06-05 14:58:02,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 11231 states have (on average 2.19740005342356) internal successors, (24679), 11231 states have internal predecessors, (24679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 24679 transitions. [2021-06-05 14:58:02,599 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 24679 transitions. Word has length 36 [2021-06-05 14:58:02,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:02,599 INFO L482 AbstractCegarLoop]: Abstraction has 11232 states and 24679 transitions. [2021-06-05 14:58:02,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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) [2021-06-05 14:58:02,599 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 24679 transitions. [2021-06-05 14:58:02,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:58:02,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:02,606 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:02,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:02,821 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:02,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1610257349, now seen corresponding path program 18 times [2021-06-05 14:58:02,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:02,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149414407] [2021-06-05 14:58:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:02,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:02,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149414407] [2021-06-05 14:58:02,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149414407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:02,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605698142] [2021-06-05 14:58:02,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:02,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:58:02,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:02,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:58:02,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:02,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605698142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:02,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:02,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 14:58:02,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044390880] [2021-06-05 14:58:02,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:58:02,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:02,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:58:02,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:58:02,954 INFO L87 Difference]: Start difference. First operand 11232 states and 24679 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-05 14:58:03,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:03,054 INFO L93 Difference]: Finished difference Result 13428 states and 29318 transitions. [2021-06-05 14:58:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:58:03,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-06-05 14:58:03,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:03,072 INFO L225 Difference]: With dead ends: 13428 [2021-06-05 14:58:03,072 INFO L226 Difference]: Without dead ends: 13422 [2021-06-05 14:58:03,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:58:03,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13422 states. [2021-06-05 14:58:03,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13422 to 12944. [2021-06-05 14:58:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12944 states, 12943 states have (on average 2.2074480414123463) internal successors, (28571), 12943 states have internal predecessors, (28571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12944 states to 12944 states and 28571 transitions. [2021-06-05 14:58:03,339 INFO L78 Accepts]: Start accepts. Automaton has 12944 states and 28571 transitions. Word has length 36 [2021-06-05 14:58:03,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:03,340 INFO L482 AbstractCegarLoop]: Abstraction has 12944 states and 28571 transitions. [2021-06-05 14:58:03,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-05 14:58:03,340 INFO L276 IsEmpty]: Start isEmpty. Operand 12944 states and 28571 transitions. [2021-06-05 14:58:03,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:58:03,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:03,347 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:03,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 14:58:03,570 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:03,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:03,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1305531729, now seen corresponding path program 19 times [2021-06-05 14:58:03,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:03,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031046795] [2021-06-05 14:58:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:03,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:03,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031046795] [2021-06-05 14:58:03,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031046795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:03,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397250400] [2021-06-05 14:58:03,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:03,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:58:03,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:03,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397250400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:03,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:03,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 14:58:03,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882538594] [2021-06-05 14:58:03,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:58:03,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:03,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:58:03,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:58:03,692 INFO L87 Difference]: Start difference. First operand 12944 states and 28571 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-05 14:58:03,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:03,809 INFO L93 Difference]: Finished difference Result 13864 states and 30236 transitions. [2021-06-05 14:58:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:58:03,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-06-05 14:58:03,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:03,830 INFO L225 Difference]: With dead ends: 13864 [2021-06-05 14:58:03,830 INFO L226 Difference]: Without dead ends: 13864 [2021-06-05 14:58:03,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:58:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13864 states. [2021-06-05 14:58:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13864 to 12976. [2021-06-05 14:58:04,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12976 states, 12975 states have (on average 2.206936416184971) internal successors, (28635), 12975 states have internal predecessors, (28635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12976 states to 12976 states and 28635 transitions. [2021-06-05 14:58:04,063 INFO L78 Accepts]: Start accepts. Automaton has 12976 states and 28635 transitions. Word has length 36 [2021-06-05 14:58:04,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:04,064 INFO L482 AbstractCegarLoop]: Abstraction has 12976 states and 28635 transitions. [2021-06-05 14:58:04,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-05 14:58:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand 12976 states and 28635 transitions. [2021-06-05 14:58:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:58:04,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:04,069 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:04,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:04,270 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:04,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:04,270 INFO L82 PathProgramCache]: Analyzing trace with hash -915327803, now seen corresponding path program 20 times [2021-06-05 14:58:04,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:04,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601308276] [2021-06-05 14:58:04,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:04,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:04,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601308276] [2021-06-05 14:58:04,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601308276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:04,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844465166] [2021-06-05 14:58:04,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:04,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:04,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:04,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:58:04,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:04,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844465166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:04,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:04,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 14:58:04,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135164893] [2021-06-05 14:58:04,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:58:04,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:04,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:58:04,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:58:04,397 INFO L87 Difference]: Start difference. First operand 12976 states and 28635 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-06-05 14:58:04,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:04,534 INFO L93 Difference]: Finished difference Result 14564 states and 31706 transitions. [2021-06-05 14:58:04,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:58:04,535 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 36 [2021-06-05 14:58:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:04,551 INFO L225 Difference]: With dead ends: 14564 [2021-06-05 14:58:04,551 INFO L226 Difference]: Without dead ends: 14564 [2021-06-05 14:58:04,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:58:04,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14564 states. [2021-06-05 14:58:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14564 to 13136. [2021-06-05 14:58:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13136 states, 13135 states have (on average 2.204415683288923) internal successors, (28955), 13135 states have internal predecessors, (28955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:04,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13136 states to 13136 states and 28955 transitions. [2021-06-05 14:58:04,735 INFO L78 Accepts]: Start accepts. Automaton has 13136 states and 28955 transitions. Word has length 36 [2021-06-05 14:58:04,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:04,736 INFO L482 AbstractCegarLoop]: Abstraction has 13136 states and 28955 transitions. [2021-06-05 14:58:04,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-06-05 14:58:04,736 INFO L276 IsEmpty]: Start isEmpty. Operand 13136 states and 28955 transitions. [2021-06-05 14:58:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:58:04,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:04,741 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:04,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 14:58:04,942 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:04,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:04,942 INFO L82 PathProgramCache]: Analyzing trace with hash 537537127, now seen corresponding path program 21 times [2021-06-05 14:58:04,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:04,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438992275] [2021-06-05 14:58:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:04,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:04,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438992275] [2021-06-05 14:58:04,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438992275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:04,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997951118] [2021-06-05 14:58:04,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:05,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:58:05,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:05,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:58:05,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:05,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997951118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:05,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:05,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:05,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238394060] [2021-06-05 14:58:05,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:05,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:05,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:05,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:05,069 INFO L87 Difference]: Start difference. First operand 13136 states and 28955 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-06-05 14:58:05,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:05,194 INFO L93 Difference]: Finished difference Result 14130 states and 30823 transitions. [2021-06-05 14:58:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:58:05,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 36 [2021-06-05 14:58:05,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:05,206 INFO L225 Difference]: With dead ends: 14130 [2021-06-05 14:58:05,206 INFO L226 Difference]: Without dead ends: 14130 [2021-06-05 14:58:05,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:05,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14130 states. [2021-06-05 14:58:05,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14130 to 12516. [2021-06-05 14:58:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12516 states, 12515 states have (on average 2.204314822213344) internal successors, (27587), 12515 states have internal predecessors, (27587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12516 states to 12516 states and 27587 transitions. [2021-06-05 14:58:05,326 INFO L78 Accepts]: Start accepts. Automaton has 12516 states and 27587 transitions. Word has length 36 [2021-06-05 14:58:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:05,326 INFO L482 AbstractCegarLoop]: Abstraction has 12516 states and 27587 transitions. [2021-06-05 14:58:05,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-06-05 14:58:05,326 INFO L276 IsEmpty]: Start isEmpty. Operand 12516 states and 27587 transitions. [2021-06-05 14:58:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 14:58:05,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:05,335 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:05,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:05,536 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:05,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:05,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1450078555, now seen corresponding path program 22 times [2021-06-05 14:58:05,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:05,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002608440] [2021-06-05 14:58:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:05,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:05,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002608440] [2021-06-05 14:58:05,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002608440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:05,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427364065] [2021-06-05 14:58:05,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:05,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:05,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:05,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:58:05,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:05,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427364065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:05,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:05,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:58:05,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837357391] [2021-06-05 14:58:05,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:58:05,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:05,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:58:05,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:58:05,687 INFO L87 Difference]: Start difference. First operand 12516 states and 27587 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:05,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:05,829 INFO L93 Difference]: Finished difference Result 15926 states and 34731 transitions. [2021-06-05 14:58:05,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:58:05,830 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 14:58:05,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:05,846 INFO L225 Difference]: With dead ends: 15926 [2021-06-05 14:58:05,846 INFO L226 Difference]: Without dead ends: 15926 [2021-06-05 14:58:05,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:05,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15926 states. [2021-06-05 14:58:05,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15926 to 13120. [2021-06-05 14:58:05,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13120 states, 13119 states have (on average 2.2095434103209084) internal successors, (28987), 13119 states have internal predecessors, (28987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:05,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13120 states to 13120 states and 28987 transitions. [2021-06-05 14:58:05,990 INFO L78 Accepts]: Start accepts. Automaton has 13120 states and 28987 transitions. Word has length 46 [2021-06-05 14:58:05,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:05,990 INFO L482 AbstractCegarLoop]: Abstraction has 13120 states and 28987 transitions. [2021-06-05 14:58:05,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:05,990 INFO L276 IsEmpty]: Start isEmpty. Operand 13120 states and 28987 transitions. [2021-06-05 14:58:06,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 14:58:06,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:06,061 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:06,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 14:58:06,269 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:06,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:06,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1917671971, now seen corresponding path program 23 times [2021-06-05 14:58:06,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:06,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362629646] [2021-06-05 14:58:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:06,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:06,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362629646] [2021-06-05 14:58:06,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362629646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:06,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556135431] [2021-06-05 14:58:06,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:06,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:58:06,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:06,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:58:06,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:06,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556135431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:06,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:06,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 14:58:06,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38361777] [2021-06-05 14:58:06,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:58:06,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:06,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:58:06,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:58:06,442 INFO L87 Difference]: Start difference. First operand 13120 states and 28987 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:06,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:06,535 INFO L93 Difference]: Finished difference Result 13630 states and 29839 transitions. [2021-06-05 14:58:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:58:06,535 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 14:58:06,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:06,548 INFO L225 Difference]: With dead ends: 13630 [2021-06-05 14:58:06,548 INFO L226 Difference]: Without dead ends: 13622 [2021-06-05 14:58:06,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:58:06,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13622 states. [2021-06-05 14:58:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13622 to 13056. [2021-06-05 14:58:06,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13056 states, 13055 states have (on average 2.2050555342780545) internal successors, (28787), 13055 states have internal predecessors, (28787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13056 states to 13056 states and 28787 transitions. [2021-06-05 14:58:06,687 INFO L78 Accepts]: Start accepts. Automaton has 13056 states and 28787 transitions. Word has length 46 [2021-06-05 14:58:06,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:06,688 INFO L482 AbstractCegarLoop]: Abstraction has 13056 states and 28787 transitions. [2021-06-05 14:58:06,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:06,688 INFO L276 IsEmpty]: Start isEmpty. Operand 13056 states and 28787 transitions. [2021-06-05 14:58:06,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 14:58:06,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:06,701 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:06,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:06,917 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:06,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:06,917 INFO L82 PathProgramCache]: Analyzing trace with hash -613294009, now seen corresponding path program 24 times [2021-06-05 14:58:06,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:06,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590181318] [2021-06-05 14:58:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:06,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:06,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590181318] [2021-06-05 14:58:06,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590181318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:06,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550585516] [2021-06-05 14:58:06,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:06,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:58:06,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:07,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:58:07,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:07,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550585516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:07,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:07,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 14:58:07,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746603572] [2021-06-05 14:58:07,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:58:07,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:07,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:58:07,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:58:07,080 INFO L87 Difference]: Start difference. First operand 13056 states and 28787 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:07,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:07,203 INFO L93 Difference]: Finished difference Result 17393 states and 37929 transitions. [2021-06-05 14:58:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:58:07,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 14:58:07,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:07,226 INFO L225 Difference]: With dead ends: 17393 [2021-06-05 14:58:07,226 INFO L226 Difference]: Without dead ends: 17393 [2021-06-05 14:58:07,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:58:07,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17393 states. [2021-06-05 14:58:07,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17393 to 15686. [2021-06-05 14:58:07,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15686 states, 15685 states have (on average 2.224099458080969) internal successors, (34885), 15685 states have internal predecessors, (34885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15686 states to 15686 states and 34885 transitions. [2021-06-05 14:58:07,435 INFO L78 Accepts]: Start accepts. Automaton has 15686 states and 34885 transitions. Word has length 46 [2021-06-05 14:58:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:07,435 INFO L482 AbstractCegarLoop]: Abstraction has 15686 states and 34885 transitions. [2021-06-05 14:58:07,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 15686 states and 34885 transitions. [2021-06-05 14:58:07,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 14:58:07,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:07,445 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:07,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 14:58:07,645 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:07,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:07,646 INFO L82 PathProgramCache]: Analyzing trace with hash 556761991, now seen corresponding path program 25 times [2021-06-05 14:58:07,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:07,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759618025] [2021-06-05 14:58:07,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:07,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:07,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759618025] [2021-06-05 14:58:07,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759618025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:07,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088055366] [2021-06-05 14:58:07,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:07,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:58:07,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:07,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088055366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:07,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:07,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 14:58:07,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100376721] [2021-06-05 14:58:07,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:58:07,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:07,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:58:07,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:58:07,790 INFO L87 Difference]: Start difference. First operand 15686 states and 34885 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:07,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:07,962 INFO L93 Difference]: Finished difference Result 16911 states and 36914 transitions. [2021-06-05 14:58:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:58:07,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 14:58:07,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:07,979 INFO L225 Difference]: With dead ends: 16911 [2021-06-05 14:58:07,979 INFO L226 Difference]: Without dead ends: 16863 [2021-06-05 14:58:07,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:58:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16863 states. [2021-06-05 14:58:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16863 to 14310. [2021-06-05 14:58:08,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14310 states, 14309 states have (on average 2.212104270039835) internal successors, (31653), 14309 states have internal predecessors, (31653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:08,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14310 states to 14310 states and 31653 transitions. [2021-06-05 14:58:08,137 INFO L78 Accepts]: Start accepts. Automaton has 14310 states and 31653 transitions. Word has length 46 [2021-06-05 14:58:08,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:08,137 INFO L482 AbstractCegarLoop]: Abstraction has 14310 states and 31653 transitions. [2021-06-05 14:58:08,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:08,137 INFO L276 IsEmpty]: Start isEmpty. Operand 14310 states and 31653 transitions. [2021-06-05 14:58:08,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 14:58:08,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:08,146 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:08,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 14:58:08,347 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:08,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:08,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1979977875, now seen corresponding path program 26 times [2021-06-05 14:58:08,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:08,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551860054] [2021-06-05 14:58:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:08,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:08,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551860054] [2021-06-05 14:58:08,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551860054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:08,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151345654] [2021-06-05 14:58:08,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:08,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:08,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:08,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:58:08,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:08,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151345654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:08,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:08,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:08,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492930539] [2021-06-05 14:58:08,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:08,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:08,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:08,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:08,488 INFO L87 Difference]: Start difference. First operand 14310 states and 31653 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-06-05 14:58:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:08,637 INFO L93 Difference]: Finished difference Result 15209 states and 33173 transitions. [2021-06-05 14:58:08,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:58:08,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 14:58:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:08,658 INFO L225 Difference]: With dead ends: 15209 [2021-06-05 14:58:08,659 INFO L226 Difference]: Without dead ends: 15137 [2021-06-05 14:58:08,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:08,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15137 states. [2021-06-05 14:58:08,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15137 to 14314. [2021-06-05 14:58:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14314 states, 14313 states have (on average 2.2051980716830855) internal successors, (31563), 14313 states have internal predecessors, (31563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14314 states to 14314 states and 31563 transitions. [2021-06-05 14:58:08,873 INFO L78 Accepts]: Start accepts. Automaton has 14314 states and 31563 transitions. Word has length 46 [2021-06-05 14:58:08,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:08,873 INFO L482 AbstractCegarLoop]: Abstraction has 14314 states and 31563 transitions. [2021-06-05 14:58:08,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-06-05 14:58:08,873 INFO L276 IsEmpty]: Start isEmpty. Operand 14314 states and 31563 transitions. [2021-06-05 14:58:08,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 14:58:08,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:08,885 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:09,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 14:58:09,101 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:09,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:09,101 INFO L82 PathProgramCache]: Analyzing trace with hash 443374363, now seen corresponding path program 27 times [2021-06-05 14:58:09,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:09,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136853985] [2021-06-05 14:58:09,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:58:09,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:09,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136853985] [2021-06-05 14:58:09,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136853985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:09,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065130290] [2021-06-05 14:58:09,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:09,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:58:09,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:09,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:58:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:58:09,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065130290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:09,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:09,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 14:58:09,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23350878] [2021-06-05 14:58:09,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:58:09,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:09,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:58:09,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:58:09,258 INFO L87 Difference]: Start difference. First operand 14314 states and 31563 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:09,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:09,377 INFO L93 Difference]: Finished difference Result 18333 states and 40131 transitions. [2021-06-05 14:58:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:58:09,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 14:58:09,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:09,402 INFO L225 Difference]: With dead ends: 18333 [2021-06-05 14:58:09,402 INFO L226 Difference]: Without dead ends: 18330 [2021-06-05 14:58:09,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:58:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18330 states. [2021-06-05 14:58:09,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18330 to 15498. [2021-06-05 14:58:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15498 states, 15497 states have (on average 2.2112021681615794) internal successors, (34267), 15497 states have internal predecessors, (34267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15498 states to 15498 states and 34267 transitions. [2021-06-05 14:58:09,716 INFO L78 Accepts]: Start accepts. Automaton has 15498 states and 34267 transitions. Word has length 46 [2021-06-05 14:58:09,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:09,716 INFO L482 AbstractCegarLoop]: Abstraction has 15498 states and 34267 transitions. [2021-06-05 14:58:09,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:09,717 INFO L276 IsEmpty]: Start isEmpty. Operand 15498 states and 34267 transitions. [2021-06-05 14:58:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 14:58:09,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:09,726 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:09,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 14:58:09,927 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:09,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:09,927 INFO L82 PathProgramCache]: Analyzing trace with hash 729697573, now seen corresponding path program 28 times [2021-06-05 14:58:09,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:09,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756793713] [2021-06-05 14:58:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:09,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:09,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756793713] [2021-06-05 14:58:09,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756793713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:09,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282553432] [2021-06-05 14:58:09,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:09,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:09,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:09,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:58:09,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:10,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282553432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:10,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:10,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 14:58:10,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967638174] [2021-06-05 14:58:10,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:58:10,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:10,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:58:10,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:58:10,069 INFO L87 Difference]: Start difference. First operand 15498 states and 34267 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:10,194 INFO L93 Difference]: Finished difference Result 20808 states and 45501 transitions. [2021-06-05 14:58:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:58:10,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 14:58:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:10,217 INFO L225 Difference]: With dead ends: 20808 [2021-06-05 14:58:10,217 INFO L226 Difference]: Without dead ends: 20808 [2021-06-05 14:58:10,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:58:10,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20808 states. [2021-06-05 14:58:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20808 to 19050. [2021-06-05 14:58:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19050 states, 19049 states have (on average 2.2252611685652792) internal successors, (42389), 19049 states have internal predecessors, (42389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:10,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19050 states to 19050 states and 42389 transitions. [2021-06-05 14:58:10,467 INFO L78 Accepts]: Start accepts. Automaton has 19050 states and 42389 transitions. Word has length 46 [2021-06-05 14:58:10,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:10,467 INFO L482 AbstractCegarLoop]: Abstraction has 19050 states and 42389 transitions. [2021-06-05 14:58:10,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:10,467 INFO L276 IsEmpty]: Start isEmpty. Operand 19050 states and 42389 transitions. [2021-06-05 14:58:10,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 14:58:10,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:10,479 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:10,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:10,680 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:10,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:10,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1899753573, now seen corresponding path program 29 times [2021-06-05 14:58:10,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:10,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859115326] [2021-06-05 14:58:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:10,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:10,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859115326] [2021-06-05 14:58:10,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859115326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:10,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557790532] [2021-06-05 14:58:10,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:10,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:58:10,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:10,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:58:10,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:10,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557790532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:10,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:10,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 14:58:10,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782270451] [2021-06-05 14:58:10,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:58:10,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:10,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:58:10,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:58:10,822 INFO L87 Difference]: Start difference. First operand 19050 states and 42389 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:10,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:10,933 INFO L93 Difference]: Finished difference Result 20381 states and 44592 transitions. [2021-06-05 14:58:10,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:58:10,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 14:58:10,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:10,953 INFO L225 Difference]: With dead ends: 20381 [2021-06-05 14:58:10,953 INFO L226 Difference]: Without dead ends: 20349 [2021-06-05 14:58:10,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:58:10,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20349 states. [2021-06-05 14:58:11,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20349 to 19030. [2021-06-05 14:58:11,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19030 states, 19029 states have (on average 2.2227652530348414) internal successors, (42297), 19029 states have internal predecessors, (42297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42297 transitions. [2021-06-05 14:58:11,159 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42297 transitions. Word has length 46 [2021-06-05 14:58:11,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:11,159 INFO L482 AbstractCegarLoop]: Abstraction has 19030 states and 42297 transitions. [2021-06-05 14:58:11,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42297 transitions. [2021-06-05 14:58:11,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 14:58:11,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:11,171 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:11,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 14:58:11,372 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:11,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:11,372 INFO L82 PathProgramCache]: Analyzing trace with hash -636986293, now seen corresponding path program 30 times [2021-06-05 14:58:11,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:11,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954204455] [2021-06-05 14:58:11,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:11,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:11,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954204455] [2021-06-05 14:58:11,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954204455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:11,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531425760] [2021-06-05 14:58:11,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:11,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:58:11,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:11,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:58:11,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:11,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531425760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:11,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:11,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:11,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757222967] [2021-06-05 14:58:11,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:11,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:11,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:11,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:11,587 INFO L87 Difference]: Start difference. First operand 19030 states and 42297 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-06-05 14:58:11,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:11,708 INFO L93 Difference]: Finished difference Result 20409 states and 44584 transitions. [2021-06-05 14:58:11,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:58:11,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 14:58:11,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:11,729 INFO L225 Difference]: With dead ends: 20409 [2021-06-05 14:58:11,729 INFO L226 Difference]: Without dead ends: 20337 [2021-06-05 14:58:11,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:11,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20337 states. [2021-06-05 14:58:11,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20337 to 19030. [2021-06-05 14:58:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19030 states, 19029 states have (on average 2.216459088759262) internal successors, (42177), 19029 states have internal predecessors, (42177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42177 transitions. [2021-06-05 14:58:11,940 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42177 transitions. Word has length 46 [2021-06-05 14:58:11,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:11,940 INFO L482 AbstractCegarLoop]: Abstraction has 19030 states and 42177 transitions. [2021-06-05 14:58:11,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-06-05 14:58:11,940 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42177 transitions. [2021-06-05 14:58:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 14:58:11,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:11,953 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:12,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 14:58:12,153 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:12,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:12,154 INFO L82 PathProgramCache]: Analyzing trace with hash 725045157, now seen corresponding path program 31 times [2021-06-05 14:58:12,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:12,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666402576] [2021-06-05 14:58:12,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:12,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:12,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666402576] [2021-06-05 14:58:12,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666402576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:12,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758696181] [2021-06-05 14:58:12,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:12,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:58:12,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:12,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758696181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:12,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:12,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:58:12,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446677258] [2021-06-05 14:58:12,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:58:12,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:12,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:58:12,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:58:12,301 INFO L87 Difference]: Start difference. First operand 19030 states and 42177 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2021-06-05 14:58:12,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:12,461 INFO L93 Difference]: Finished difference Result 20155 states and 44063 transitions. [2021-06-05 14:58:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:12,462 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 14:58:12,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:12,481 INFO L225 Difference]: With dead ends: 20155 [2021-06-05 14:58:12,482 INFO L226 Difference]: Without dead ends: 20027 [2021-06-05 14:58:12,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:58:12,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20027 states. [2021-06-05 14:58:12,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20027 to 19078. [2021-06-05 14:58:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19078 states, 19077 states have (on average 2.210043507889081) internal successors, (42161), 19077 states have internal predecessors, (42161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19078 states to 19078 states and 42161 transitions. [2021-06-05 14:58:12,692 INFO L78 Accepts]: Start accepts. Automaton has 19078 states and 42161 transitions. Word has length 46 [2021-06-05 14:58:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:12,692 INFO L482 AbstractCegarLoop]: Abstraction has 19078 states and 42161 transitions. [2021-06-05 14:58:12,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2021-06-05 14:58:12,692 INFO L276 IsEmpty]: Start isEmpty. Operand 19078 states and 42161 transitions. [2021-06-05 14:58:12,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 14:58:12,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:12,704 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:12,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:12,904 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:12,905 INFO L82 PathProgramCache]: Analyzing trace with hash -876630137, now seen corresponding path program 32 times [2021-06-05 14:58:12,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:12,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218049773] [2021-06-05 14:58:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:58:12,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:12,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218049773] [2021-06-05 14:58:12,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218049773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:12,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708489455] [2021-06-05 14:58:12,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:12,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:12,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:12,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:58:12,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:58:13,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708489455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:13,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:13,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:58:13,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431271831] [2021-06-05 14:58:13,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:58:13,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:13,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:58:13,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:58:13,066 INFO L87 Difference]: Start difference. First operand 19078 states and 42161 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:13,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:13,230 INFO L93 Difference]: Finished difference Result 20680 states and 45191 transitions. [2021-06-05 14:58:13,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:58:13,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 14:58:13,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:13,256 INFO L225 Difference]: With dead ends: 20680 [2021-06-05 14:58:13,257 INFO L226 Difference]: Without dead ends: 20680 [2021-06-05 14:58:13,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:58:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20680 states. [2021-06-05 14:58:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20680 to 17730. [2021-06-05 14:58:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17730 states, 17729 states have (on average 2.2009701618816626) internal successors, (39021), 17729 states have internal predecessors, (39021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17730 states to 17730 states and 39021 transitions. [2021-06-05 14:58:13,509 INFO L78 Accepts]: Start accepts. Automaton has 17730 states and 39021 transitions. Word has length 46 [2021-06-05 14:58:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:13,509 INFO L482 AbstractCegarLoop]: Abstraction has 17730 states and 39021 transitions. [2021-06-05 14:58:13,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 17730 states and 39021 transitions. [2021-06-05 14:58:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 14:58:13,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:13,521 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:13,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 14:58:13,721 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:13,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:13,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1293149669, now seen corresponding path program 33 times [2021-06-05 14:58:13,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:13,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517058211] [2021-06-05 14:58:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:58:13,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:13,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517058211] [2021-06-05 14:58:13,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517058211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:13,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480227408] [2021-06-05 14:58:13,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:13,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:58:13,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:13,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:58:13,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:58:13,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480227408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:13,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:13,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:13,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823133304] [2021-06-05 14:58:13,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:13,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:13,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:13,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:13,911 INFO L87 Difference]: Start difference. First operand 17730 states and 39021 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2021-06-05 14:58:14,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:14,025 INFO L93 Difference]: Finished difference Result 19104 states and 41588 transitions. [2021-06-05 14:58:14,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:58:14,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 46 [2021-06-05 14:58:14,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:14,046 INFO L225 Difference]: With dead ends: 19104 [2021-06-05 14:58:14,046 INFO L226 Difference]: Without dead ends: 19104 [2021-06-05 14:58:14,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19104 states. [2021-06-05 14:58:14,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19104 to 17742. [2021-06-05 14:58:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17742 states, 17741 states have (on average 2.200834225804633) internal successors, (39045), 17741 states have internal predecessors, (39045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17742 states to 17742 states and 39045 transitions. [2021-06-05 14:58:14,233 INFO L78 Accepts]: Start accepts. Automaton has 17742 states and 39045 transitions. Word has length 46 [2021-06-05 14:58:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:14,233 INFO L482 AbstractCegarLoop]: Abstraction has 17742 states and 39045 transitions. [2021-06-05 14:58:14,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2021-06-05 14:58:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 17742 states and 39045 transitions. [2021-06-05 14:58:14,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 14:58:14,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:14,245 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:14,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:14,445 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:14,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:14,446 INFO L82 PathProgramCache]: Analyzing trace with hash -731848889, now seen corresponding path program 34 times [2021-06-05 14:58:14,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:14,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069592560] [2021-06-05 14:58:14,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:14,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:14,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069592560] [2021-06-05 14:58:14,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069592560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:14,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276393121] [2021-06-05 14:58:14,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:14,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:14,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:14,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:58:14,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:14,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276393121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:14,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:14,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 14:58:14,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672635004] [2021-06-05 14:58:14,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:58:14,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:14,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:58:14,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:58:14,599 INFO L87 Difference]: Start difference. First operand 17742 states and 39045 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:14,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:14,736 INFO L93 Difference]: Finished difference Result 21829 states and 47682 transitions. [2021-06-05 14:58:14,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:58:14,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 14:58:14,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:14,765 INFO L225 Difference]: With dead ends: 21829 [2021-06-05 14:58:14,766 INFO L226 Difference]: Without dead ends: 21829 [2021-06-05 14:58:14,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:58:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21829 states. [2021-06-05 14:58:14,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21829 to 20406. [2021-06-05 14:58:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20406 states, 20405 states have (on average 2.2182308257779955) internal successors, (45263), 20405 states have internal predecessors, (45263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20406 states to 20406 states and 45263 transitions. [2021-06-05 14:58:15,005 INFO L78 Accepts]: Start accepts. Automaton has 20406 states and 45263 transitions. Word has length 46 [2021-06-05 14:58:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:15,005 INFO L482 AbstractCegarLoop]: Abstraction has 20406 states and 45263 transitions. [2021-06-05 14:58:15,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 20406 states and 45263 transitions. [2021-06-05 14:58:15,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 14:58:15,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:15,018 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:15,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 14:58:15,219 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:15,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:15,219 INFO L82 PathProgramCache]: Analyzing trace with hash 438207111, now seen corresponding path program 35 times [2021-06-05 14:58:15,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:15,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657911631] [2021-06-05 14:58:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:15,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:15,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657911631] [2021-06-05 14:58:15,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657911631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:15,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119509575] [2021-06-05 14:58:15,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:15,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:58:15,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:15,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:58:15,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:15,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119509575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:15,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:15,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 14:58:15,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648019433] [2021-06-05 14:58:15,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:58:15,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:15,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:58:15,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:58:15,412 INFO L87 Difference]: Start difference. First operand 20406 states and 45263 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:15,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:15,517 INFO L93 Difference]: Finished difference Result 21712 states and 47427 transitions. [2021-06-05 14:58:15,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:58:15,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 14:58:15,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:15,538 INFO L225 Difference]: With dead ends: 21712 [2021-06-05 14:58:15,538 INFO L226 Difference]: Without dead ends: 21704 [2021-06-05 14:58:15,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:58:15,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21704 states. [2021-06-05 14:58:15,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21704 to 20402. [2021-06-05 14:58:15,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20402 states, 20401 states have (on average 2.21768540757806) internal successors, (45243), 20401 states have internal predecessors, (45243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:15,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45243 transitions. [2021-06-05 14:58:15,753 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45243 transitions. Word has length 46 [2021-06-05 14:58:15,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:15,753 INFO L482 AbstractCegarLoop]: Abstraction has 20402 states and 45243 transitions. [2021-06-05 14:58:15,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:15,753 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45243 transitions. [2021-06-05 14:58:15,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 14:58:15,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:15,765 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:15,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:15,966 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:15,966 INFO L82 PathProgramCache]: Analyzing trace with hash -2098532755, now seen corresponding path program 36 times [2021-06-05 14:58:15,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:15,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239804549] [2021-06-05 14:58:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:16,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:16,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239804549] [2021-06-05 14:58:16,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239804549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:16,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670378483] [2021-06-05 14:58:16,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:16,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:58:16,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:16,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:58:16,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:58:16,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670378483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:16,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:16,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 14:58:16,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295649030] [2021-06-05 14:58:16,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:58:16,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:16,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:58:16,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:16,131 INFO L87 Difference]: Start difference. First operand 20402 states and 45243 transitions. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:16,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:16,643 INFO L93 Difference]: Finished difference Result 28400 states and 61628 transitions. [2021-06-05 14:58:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:58:16,643 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 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 46 [2021-06-05 14:58:16,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:16,683 INFO L225 Difference]: With dead ends: 28400 [2021-06-05 14:58:16,684 INFO L226 Difference]: Without dead ends: 28376 [2021-06-05 14:58:16,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:58:16,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28376 states. [2021-06-05 14:58:16,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28376 to 20402. [2021-06-05 14:58:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20402 states, 20401 states have (on average 2.212979755894319) internal successors, (45147), 20401 states have internal predecessors, (45147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45147 transitions. [2021-06-05 14:58:16,964 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45147 transitions. Word has length 46 [2021-06-05 14:58:16,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:16,964 INFO L482 AbstractCegarLoop]: Abstraction has 20402 states and 45147 transitions. [2021-06-05 14:58:16,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:16,964 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45147 transitions. [2021-06-05 14:58:17,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:17,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:17,076 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:17,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 14:58:17,279 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:17,279 INFO L82 PathProgramCache]: Analyzing trace with hash -676350810, now seen corresponding path program 37 times [2021-06-05 14:58:17,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:17,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631857575] [2021-06-05 14:58:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:17,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:17,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631857575] [2021-06-05 14:58:17,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631857575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:17,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58394904] [2021-06-05 14:58:17,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:17,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:17,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:17,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58394904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:17,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:17,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 14:58:17,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475622704] [2021-06-05 14:58:17,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:58:17,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:17,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:58:17,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:58:17,489 INFO L87 Difference]: Start difference. First operand 20402 states and 45147 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:17,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:17,757 INFO L93 Difference]: Finished difference Result 25889 states and 56595 transitions. [2021-06-05 14:58:17,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:17,758 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:17,796 INFO L225 Difference]: With dead ends: 25889 [2021-06-05 14:58:17,796 INFO L226 Difference]: Without dead ends: 25889 [2021-06-05 14:58:17,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:58:17,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25889 states. [2021-06-05 14:58:18,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25889 to 21836. [2021-06-05 14:58:18,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21836 states, 21835 states have (on average 2.216762079230593) internal successors, (48403), 21835 states have internal predecessors, (48403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21836 states to 21836 states and 48403 transitions. [2021-06-05 14:58:18,152 INFO L78 Accepts]: Start accepts. Automaton has 21836 states and 48403 transitions. Word has length 56 [2021-06-05 14:58:18,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:18,153 INFO L482 AbstractCegarLoop]: Abstraction has 21836 states and 48403 transitions. [2021-06-05 14:58:18,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:18,153 INFO L276 IsEmpty]: Start isEmpty. Operand 21836 states and 48403 transitions. [2021-06-05 14:58:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:18,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:18,171 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:18,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 14:58:18,393 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:18,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1178558949, now seen corresponding path program 38 times [2021-06-05 14:58:18,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:18,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254543559] [2021-06-05 14:58:18,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:18,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:18,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254543559] [2021-06-05 14:58:18,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254543559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:18,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356321010] [2021-06-05 14:58:18,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:18,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:18,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:18,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:18,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:18,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356321010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:18,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:18,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 14:58:18,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246495717] [2021-06-05 14:58:18,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:58:18,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:18,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:58:18,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:58:18,594 INFO L87 Difference]: Start difference. First operand 21836 states and 48403 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:18,850 INFO L93 Difference]: Finished difference Result 31481 states and 69778 transitions. [2021-06-05 14:58:18,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:58:18,851 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:18,886 INFO L225 Difference]: With dead ends: 31481 [2021-06-05 14:58:18,887 INFO L226 Difference]: Without dead ends: 31323 [2021-06-05 14:58:18,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:58:18,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31323 states. [2021-06-05 14:58:19,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31323 to 30212. [2021-06-05 14:58:19,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30212 states, 30211 states have (on average 2.2320015888252622) internal successors, (67431), 30211 states have internal predecessors, (67431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30212 states to 30212 states and 67431 transitions. [2021-06-05 14:58:19,357 INFO L78 Accepts]: Start accepts. Automaton has 30212 states and 67431 transitions. Word has length 56 [2021-06-05 14:58:19,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:19,357 INFO L482 AbstractCegarLoop]: Abstraction has 30212 states and 67431 transitions. [2021-06-05 14:58:19,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:19,357 INFO L276 IsEmpty]: Start isEmpty. Operand 30212 states and 67431 transitions. [2021-06-05 14:58:19,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:19,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:19,379 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:19,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:19,580 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:19,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:19,580 INFO L82 PathProgramCache]: Analyzing trace with hash 153461775, now seen corresponding path program 39 times [2021-06-05 14:58:19,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:19,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104051177] [2021-06-05 14:58:19,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:19,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:19,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104051177] [2021-06-05 14:58:19,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104051177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:19,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884452244] [2021-06-05 14:58:19,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:19,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:58:19,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:19,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:19,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:19,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884452244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:19,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:19,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:19,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021076793] [2021-06-05 14:58:19,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:19,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:19,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:19,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:19,733 INFO L87 Difference]: Start difference. First operand 30212 states and 67431 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:19,882 INFO L93 Difference]: Finished difference Result 31139 states and 68850 transitions. [2021-06-05 14:58:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:19,882 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:19,915 INFO L225 Difference]: With dead ends: 31139 [2021-06-05 14:58:19,915 INFO L226 Difference]: Without dead ends: 31139 [2021-06-05 14:58:19,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:19,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31139 states. [2021-06-05 14:58:20,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31139 to 28244. [2021-06-05 14:58:20,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28244 states, 28243 states have (on average 2.2232411571008743) internal successors, (62791), 28243 states have internal predecessors, (62791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28244 states to 28244 states and 62791 transitions. [2021-06-05 14:58:20,314 INFO L78 Accepts]: Start accepts. Automaton has 28244 states and 62791 transitions. Word has length 56 [2021-06-05 14:58:20,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:20,314 INFO L482 AbstractCegarLoop]: Abstraction has 28244 states and 62791 transitions. [2021-06-05 14:58:20,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:20,314 INFO L276 IsEmpty]: Start isEmpty. Operand 28244 states and 62791 transitions. [2021-06-05 14:58:20,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:20,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:20,334 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:20,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 14:58:20,535 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:20,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:20,535 INFO L82 PathProgramCache]: Analyzing trace with hash 359936614, now seen corresponding path program 40 times [2021-06-05 14:58:20,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:20,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231527082] [2021-06-05 14:58:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:20,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:20,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231527082] [2021-06-05 14:58:20,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231527082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:20,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322430270] [2021-06-05 14:58:20,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:20,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:20,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:20,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:20,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:20,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322430270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:20,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:20,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:20,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511054940] [2021-06-05 14:58:20,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:20,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:20,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:20,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:20,715 INFO L87 Difference]: Start difference. First operand 28244 states and 62791 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:20,855 INFO L93 Difference]: Finished difference Result 29356 states and 64669 transitions. [2021-06-05 14:58:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:20,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:20,885 INFO L225 Difference]: With dead ends: 29356 [2021-06-05 14:58:20,886 INFO L226 Difference]: Without dead ends: 29352 [2021-06-05 14:58:20,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:20,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29352 states. [2021-06-05 14:58:21,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29352 to 27360. [2021-06-05 14:58:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27360 states, 27359 states have (on average 2.2246061625059395) internal successors, (60863), 27359 states have internal predecessors, (60863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:21,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27360 states to 27360 states and 60863 transitions. [2021-06-05 14:58:21,228 INFO L78 Accepts]: Start accepts. Automaton has 27360 states and 60863 transitions. Word has length 56 [2021-06-05 14:58:21,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:21,228 INFO L482 AbstractCegarLoop]: Abstraction has 27360 states and 60863 transitions. [2021-06-05 14:58:21,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 27360 states and 60863 transitions. [2021-06-05 14:58:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:21,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:21,247 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:21,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:21,448 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:21,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:21,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1412824282, now seen corresponding path program 41 times [2021-06-05 14:58:21,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:21,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848272126] [2021-06-05 14:58:21,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:21,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:21,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848272126] [2021-06-05 14:58:21,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848272126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:21,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141633178] [2021-06-05 14:58:21,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:21,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:58:21,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:21,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:21,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:21,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141633178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:21,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:21,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:21,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114643192] [2021-06-05 14:58:21,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:21,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:21,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:21,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:21,602 INFO L87 Difference]: Start difference. First operand 27360 states and 60863 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:21,763 INFO L93 Difference]: Finished difference Result 35236 states and 77241 transitions. [2021-06-05 14:58:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:21,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:21,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:21,803 INFO L225 Difference]: With dead ends: 35236 [2021-06-05 14:58:21,804 INFO L226 Difference]: Without dead ends: 35236 [2021-06-05 14:58:21,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:21,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35236 states. [2021-06-05 14:58:22,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35236 to 31608. [2021-06-05 14:58:22,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31608 states, 31607 states have (on average 2.2330180023412534) internal successors, (70579), 31607 states have internal predecessors, (70579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31608 states to 31608 states and 70579 transitions. [2021-06-05 14:58:22,197 INFO L78 Accepts]: Start accepts. Automaton has 31608 states and 70579 transitions. Word has length 56 [2021-06-05 14:58:22,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:22,198 INFO L482 AbstractCegarLoop]: Abstraction has 31608 states and 70579 transitions. [2021-06-05 14:58:22,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:22,198 INFO L276 IsEmpty]: Start isEmpty. Operand 31608 states and 70579 transitions. [2021-06-05 14:58:22,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:22,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:22,218 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:22,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:22,419 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:22,419 INFO L82 PathProgramCache]: Analyzing trace with hash -417869413, now seen corresponding path program 42 times [2021-06-05 14:58:22,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:22,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43150250] [2021-06-05 14:58:22,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:22,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:22,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43150250] [2021-06-05 14:58:22,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43150250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:22,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136840672] [2021-06-05 14:58:22,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:22,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:58:22,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:22,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:22,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:22,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136840672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:22,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:22,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:22,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610666288] [2021-06-05 14:58:22,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:22,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:22,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:22,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:22,570 INFO L87 Difference]: Start difference. First operand 31608 states and 70579 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:22,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:22,725 INFO L93 Difference]: Finished difference Result 34730 states and 77163 transitions. [2021-06-05 14:58:22,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:22,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:22,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:22,887 INFO L225 Difference]: With dead ends: 34730 [2021-06-05 14:58:22,887 INFO L226 Difference]: Without dead ends: 34724 [2021-06-05 14:58:22,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34724 states. [2021-06-05 14:58:23,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34724 to 33620. [2021-06-05 14:58:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33620 states, 33619 states have (on average 2.240013087837235) internal successors, (75307), 33619 states have internal predecessors, (75307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33620 states to 33620 states and 75307 transitions. [2021-06-05 14:58:23,265 INFO L78 Accepts]: Start accepts. Automaton has 33620 states and 75307 transitions. Word has length 56 [2021-06-05 14:58:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:23,265 INFO L482 AbstractCegarLoop]: Abstraction has 33620 states and 75307 transitions. [2021-06-05 14:58:23,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:23,265 INFO L276 IsEmpty]: Start isEmpty. Operand 33620 states and 75307 transitions. [2021-06-05 14:58:23,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:23,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:23,285 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:23,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 14:58:23,486 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:23,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:23,486 INFO L82 PathProgramCache]: Analyzing trace with hash -113143793, now seen corresponding path program 43 times [2021-06-05 14:58:23,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:23,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730693482] [2021-06-05 14:58:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:23,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:23,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730693482] [2021-06-05 14:58:23,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730693482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:23,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101608668] [2021-06-05 14:58:23,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:23,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:23,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:23,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101608668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:23,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:23,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:23,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518738265] [2021-06-05 14:58:23,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:23,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:23,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:23,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:23,644 INFO L87 Difference]: Start difference. First operand 33620 states and 75307 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:23,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:23,806 INFO L93 Difference]: Finished difference Result 35642 states and 78991 transitions. [2021-06-05 14:58:23,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:23,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:23,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:23,847 INFO L225 Difference]: With dead ends: 35642 [2021-06-05 14:58:23,847 INFO L226 Difference]: Without dead ends: 35640 [2021-06-05 14:58:23,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35640 states. [2021-06-05 14:58:24,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35640 to 33704. [2021-06-05 14:58:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33704 states, 33703 states have (on average 2.237159896745097) internal successors, (75399), 33703 states have internal predecessors, (75399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33704 states to 33704 states and 75399 transitions. [2021-06-05 14:58:24,238 INFO L78 Accepts]: Start accepts. Automaton has 33704 states and 75399 transitions. Word has length 56 [2021-06-05 14:58:24,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:24,238 INFO L482 AbstractCegarLoop]: Abstraction has 33704 states and 75399 transitions. [2021-06-05 14:58:24,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 33704 states and 75399 transitions. [2021-06-05 14:58:24,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:24,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:24,259 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:24,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:24,459 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:24,460 INFO L82 PathProgramCache]: Analyzing trace with hash 93331046, now seen corresponding path program 44 times [2021-06-05 14:58:24,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:24,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760231328] [2021-06-05 14:58:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:24,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:24,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760231328] [2021-06-05 14:58:24,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760231328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:24,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505629794] [2021-06-05 14:58:24,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:24,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:24,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:24,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:24,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:24,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505629794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:24,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:24,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:24,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914911344] [2021-06-05 14:58:24,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:24,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:24,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:24,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:24,604 INFO L87 Difference]: Start difference. First operand 33704 states and 75399 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:24,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:24,781 INFO L93 Difference]: Finished difference Result 35791 states and 78899 transitions. [2021-06-05 14:58:24,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:24,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:24,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:24,819 INFO L225 Difference]: With dead ends: 35791 [2021-06-05 14:58:24,819 INFO L226 Difference]: Without dead ends: 35723 [2021-06-05 14:58:24,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:24,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35723 states. [2021-06-05 14:58:25,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35723 to 33624. [2021-06-05 14:58:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33624 states, 33623 states have (on average 2.2343931237545727) internal successors, (75127), 33623 states have internal predecessors, (75127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33624 states to 33624 states and 75127 transitions. [2021-06-05 14:58:25,283 INFO L78 Accepts]: Start accepts. Automaton has 33624 states and 75127 transitions. Word has length 56 [2021-06-05 14:58:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:25,283 INFO L482 AbstractCegarLoop]: Abstraction has 33624 states and 75127 transitions. [2021-06-05 14:58:25,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:25,284 INFO L276 IsEmpty]: Start isEmpty. Operand 33624 states and 75127 transitions. [2021-06-05 14:58:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:25,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:25,303 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:25,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 14:58:25,504 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:25,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:25,504 INFO L82 PathProgramCache]: Analyzing trace with hash 277060133, now seen corresponding path program 45 times [2021-06-05 14:58:25,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:25,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679048073] [2021-06-05 14:58:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:25,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:25,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679048073] [2021-06-05 14:58:25,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679048073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:25,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516157179] [2021-06-05 14:58:25,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:25,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:58:25,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:25,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:25,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:25,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516157179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:25,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:25,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:58:25,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582619638] [2021-06-05 14:58:25,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:58:25,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:25,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:58:25,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:58:25,658 INFO L87 Difference]: Start difference. First operand 33624 states and 75127 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:25,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:25,829 INFO L93 Difference]: Finished difference Result 35258 states and 78007 transitions. [2021-06-05 14:58:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:25,829 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:25,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:25,864 INFO L225 Difference]: With dead ends: 35258 [2021-06-05 14:58:25,864 INFO L226 Difference]: Without dead ends: 35256 [2021-06-05 14:58:25,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:58:25,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35256 states. [2021-06-05 14:58:26,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35256 to 33208. [2021-06-05 14:58:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 33207 states have (on average 2.2308248260908843) internal successors, (74079), 33207 states have internal predecessors, (74079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74079 transitions. [2021-06-05 14:58:26,232 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74079 transitions. Word has length 56 [2021-06-05 14:58:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:26,232 INFO L482 AbstractCegarLoop]: Abstraction has 33208 states and 74079 transitions. [2021-06-05 14:58:26,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74079 transitions. [2021-06-05 14:58:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:26,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:26,252 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:26,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 14:58:26,453 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:26,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1851558476, now seen corresponding path program 46 times [2021-06-05 14:58:26,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:26,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501427013] [2021-06-05 14:58:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:26,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:26,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501427013] [2021-06-05 14:58:26,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501427013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:26,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541688694] [2021-06-05 14:58:26,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:26,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:26,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:26,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:26,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:26,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541688694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:26,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:26,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:58:26,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578723542] [2021-06-05 14:58:26,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:58:26,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:26,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:58:26,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:58:26,582 INFO L87 Difference]: Start difference. First operand 33208 states and 74079 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:26,770 INFO L93 Difference]: Finished difference Result 34889 states and 76950 transitions. [2021-06-05 14:58:26,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:58:26,771 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:26,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:26,807 INFO L225 Difference]: With dead ends: 34889 [2021-06-05 14:58:26,807 INFO L226 Difference]: Without dead ends: 34865 [2021-06-05 14:58:26,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:58:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34865 states. [2021-06-05 14:58:27,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34865 to 33208. [2021-06-05 14:58:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 33207 states have (on average 2.2297407173186374) internal successors, (74043), 33207 states have internal predecessors, (74043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74043 transitions. [2021-06-05 14:58:27,419 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74043 transitions. Word has length 56 [2021-06-05 14:58:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:27,419 INFO L482 AbstractCegarLoop]: Abstraction has 33208 states and 74043 transitions. [2021-06-05 14:58:27,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74043 transitions. [2021-06-05 14:58:27,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:27,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:27,439 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:27,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 14:58:27,640 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:27,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:27,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1633200633, now seen corresponding path program 47 times [2021-06-05 14:58:27,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:27,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028279049] [2021-06-05 14:58:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 14:58:27,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:27,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028279049] [2021-06-05 14:58:27,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028279049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:27,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834590687] [2021-06-05 14:58:27,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:27,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:58:27,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:27,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:27,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 14:58:27,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834590687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:27,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:27,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:27,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284647503] [2021-06-05 14:58:27,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:27,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:27,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:27,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:27,926 INFO L87 Difference]: Start difference. First operand 33208 states and 74043 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:28,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:28,088 INFO L93 Difference]: Finished difference Result 35848 states and 79532 transitions. [2021-06-05 14:58:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:58:28,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:28,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:28,127 INFO L225 Difference]: With dead ends: 35848 [2021-06-05 14:58:28,127 INFO L226 Difference]: Without dead ends: 35812 [2021-06-05 14:58:28,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:28,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35812 states. [2021-06-05 14:58:28,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35812 to 32944. [2021-06-05 14:58:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32944 states, 32943 states have (on average 2.231581823149076) internal successors, (73515), 32943 states have internal predecessors, (73515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:28,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32944 states to 32944 states and 73515 transitions. [2021-06-05 14:58:28,576 INFO L78 Accepts]: Start accepts. Automaton has 32944 states and 73515 transitions. Word has length 56 [2021-06-05 14:58:28,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:28,576 INFO L482 AbstractCegarLoop]: Abstraction has 32944 states and 73515 transitions. [2021-06-05 14:58:28,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 32944 states and 73515 transitions. [2021-06-05 14:58:28,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:28,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:28,596 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:28,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 14:58:28,797 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:28,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:28,797 INFO L82 PathProgramCache]: Analyzing trace with hash -916831962, now seen corresponding path program 48 times [2021-06-05 14:58:28,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:28,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969228857] [2021-06-05 14:58:28,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:28,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:28,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969228857] [2021-06-05 14:58:28,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969228857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:28,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207836403] [2021-06-05 14:58:28,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:28,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:58:28,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:28,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:28,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:28,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207836403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:28,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:28,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:28,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370605965] [2021-06-05 14:58:28,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:28,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:28,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:28,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:28,946 INFO L87 Difference]: Start difference. First operand 32944 states and 73515 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:29,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:29,103 INFO L93 Difference]: Finished difference Result 40718 states and 89870 transitions. [2021-06-05 14:58:29,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:29,104 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:29,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:29,288 INFO L225 Difference]: With dead ends: 40718 [2021-06-05 14:58:29,288 INFO L226 Difference]: Without dead ends: 40718 [2021-06-05 14:58:29,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:29,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40718 states. [2021-06-05 14:58:29,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40718 to 37152. [2021-06-05 14:58:29,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37152 states, 37151 states have (on average 2.2417431563080403) internal successors, (83283), 37151 states have internal predecessors, (83283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:29,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37152 states to 37152 states and 83283 transitions. [2021-06-05 14:58:29,874 INFO L78 Accepts]: Start accepts. Automaton has 37152 states and 83283 transitions. Word has length 56 [2021-06-05 14:58:29,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:29,874 INFO L482 AbstractCegarLoop]: Abstraction has 37152 states and 83283 transitions. [2021-06-05 14:58:29,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:29,874 INFO L276 IsEmpty]: Start isEmpty. Operand 37152 states and 83283 transitions. [2021-06-05 14:58:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:29,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:29,893 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:30,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:30,093 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:30,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:30,094 INFO L82 PathProgramCache]: Analyzing trace with hash 78122907, now seen corresponding path program 49 times [2021-06-05 14:58:30,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:30,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849351443] [2021-06-05 14:58:30,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:30,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:30,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849351443] [2021-06-05 14:58:30,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849351443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:30,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227455809] [2021-06-05 14:58:30,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:30,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:30,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:30,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227455809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:30,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:30,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:30,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829835940] [2021-06-05 14:58:30,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:30,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:30,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:30,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:30,266 INFO L87 Difference]: Start difference. First operand 37152 states and 83283 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:30,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:30,573 INFO L93 Difference]: Finished difference Result 40524 states and 90274 transitions. [2021-06-05 14:58:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:30,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:30,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:30,618 INFO L225 Difference]: With dead ends: 40524 [2021-06-05 14:58:30,618 INFO L226 Difference]: Without dead ends: 40488 [2021-06-05 14:58:30,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:30,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40488 states. [2021-06-05 14:58:30,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40488 to 36712. [2021-06-05 14:58:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36712 states, 36711 states have (on average 2.242025550924791) internal successors, (82307), 36711 states have internal predecessors, (82307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36712 states to 36712 states and 82307 transitions. [2021-06-05 14:58:31,067 INFO L78 Accepts]: Start accepts. Automaton has 36712 states and 82307 transitions. Word has length 56 [2021-06-05 14:58:31,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:31,067 INFO L482 AbstractCegarLoop]: Abstraction has 36712 states and 82307 transitions. [2021-06-05 14:58:31,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:31,067 INFO L276 IsEmpty]: Start isEmpty. Operand 36712 states and 82307 transitions. [2021-06-05 14:58:31,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:31,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:31,086 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:31,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:31,289 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:31,289 INFO L82 PathProgramCache]: Analyzing trace with hash 382848527, now seen corresponding path program 50 times [2021-06-05 14:58:31,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:31,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601386208] [2021-06-05 14:58:31,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:31,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:31,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601386208] [2021-06-05 14:58:31,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601386208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:31,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261729122] [2021-06-05 14:58:31,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:31,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:31,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:31,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:31,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:31,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261729122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:31,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:31,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:31,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120903571] [2021-06-05 14:58:31,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:31,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:31,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:31,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:31,430 INFO L87 Difference]: Start difference. First operand 36712 states and 82307 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:31,558 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 14:58:31,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:31,690 INFO L93 Difference]: Finished difference Result 39280 states and 87158 transitions. [2021-06-05 14:58:31,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:31,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:31,730 INFO L225 Difference]: With dead ends: 39280 [2021-06-05 14:58:31,730 INFO L226 Difference]: Without dead ends: 39278 [2021-06-05 14:58:31,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 149.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:31,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39278 states. [2021-06-05 14:58:32,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39278 to 36836. [2021-06-05 14:58:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36836 states, 36835 states have (on average 2.2415365820551107) internal successors, (82567), 36835 states have internal predecessors, (82567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:32,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36836 states to 36836 states and 82567 transitions. [2021-06-05 14:58:32,452 INFO L78 Accepts]: Start accepts. Automaton has 36836 states and 82567 transitions. Word has length 56 [2021-06-05 14:58:32,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:32,452 INFO L482 AbstractCegarLoop]: Abstraction has 36836 states and 82567 transitions. [2021-06-05 14:58:32,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 36836 states and 82567 transitions. [2021-06-05 14:58:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:32,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:32,470 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:32,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:32,671 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:32,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:32,671 INFO L82 PathProgramCache]: Analyzing trace with hash 589323366, now seen corresponding path program 51 times [2021-06-05 14:58:32,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:32,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285877570] [2021-06-05 14:58:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:32,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:32,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285877570] [2021-06-05 14:58:32,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285877570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:32,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935066331] [2021-06-05 14:58:32,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:32,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:58:32,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:32,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:58:32,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:58:32,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935066331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:32,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:32,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 14:58:32,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298025142] [2021-06-05 14:58:32,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:58:32,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:32,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:58:32,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:58:32,906 INFO L87 Difference]: Start difference. First operand 36836 states and 82567 transitions. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:33,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:33,769 INFO L93 Difference]: Finished difference Result 65704 states and 142418 transitions. [2021-06-05 14:58:33,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 14:58:33,769 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 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 56 [2021-06-05 14:58:33,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:33,844 INFO L225 Difference]: With dead ends: 65704 [2021-06-05 14:58:33,844 INFO L226 Difference]: Without dead ends: 65560 [2021-06-05 14:58:33,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 418.6ms TimeCoverageRelationStatistics Valid=437, Invalid=2755, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 14:58:33,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65560 states. [2021-06-05 14:58:34,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65560 to 50470. [2021-06-05 14:58:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50470 states, 50469 states have (on average 2.2044225167924867) internal successors, (111255), 50469 states have internal predecessors, (111255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:34,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50470 states to 50470 states and 111255 transitions. [2021-06-05 14:58:34,775 INFO L78 Accepts]: Start accepts. Automaton has 50470 states and 111255 transitions. Word has length 56 [2021-06-05 14:58:34,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:34,775 INFO L482 AbstractCegarLoop]: Abstraction has 50470 states and 111255 transitions. [2021-06-05 14:58:34,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:34,775 INFO L276 IsEmpty]: Start isEmpty. Operand 50470 states and 111255 transitions. [2021-06-05 14:58:34,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:34,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:34,800 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:35,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 14:58:35,001 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:35,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:35,002 INFO L82 PathProgramCache]: Analyzing trace with hash 773052453, now seen corresponding path program 52 times [2021-06-05 14:58:35,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:35,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746241982] [2021-06-05 14:58:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:35,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:35,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746241982] [2021-06-05 14:58:35,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746241982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:35,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813928243] [2021-06-05 14:58:35,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:35,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:35,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:35,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:35,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:35,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813928243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:35,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:35,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:58:35,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862026099] [2021-06-05 14:58:35,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:58:35,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:35,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:58:35,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:58:35,174 INFO L87 Difference]: Start difference. First operand 50470 states and 111255 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:35,584 INFO L93 Difference]: Finished difference Result 57450 states and 125218 transitions. [2021-06-05 14:58:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:58:35,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:35,671 INFO L225 Difference]: With dead ends: 57450 [2021-06-05 14:58:35,671 INFO L226 Difference]: Without dead ends: 57432 [2021-06-05 14:58:35,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:58:35,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57432 states. [2021-06-05 14:58:36,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57432 to 50730. [2021-06-05 14:58:36,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50730 states, 50729 states have (on average 2.2019554889708055) internal successors, (111703), 50729 states have internal predecessors, (111703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:36,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50730 states to 50730 states and 111703 transitions. [2021-06-05 14:58:36,437 INFO L78 Accepts]: Start accepts. Automaton has 50730 states and 111703 transitions. Word has length 56 [2021-06-05 14:58:36,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:36,438 INFO L482 AbstractCegarLoop]: Abstraction has 50730 states and 111703 transitions. [2021-06-05 14:58:36,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:36,438 INFO L276 IsEmpty]: Start isEmpty. Operand 50730 states and 111703 transitions. [2021-06-05 14:58:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:36,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:36,463 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:36,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:36,664 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:36,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:36,664 INFO L82 PathProgramCache]: Analyzing trace with hash -2069049913, now seen corresponding path program 53 times [2021-06-05 14:58:36,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:36,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035163223] [2021-06-05 14:58:36,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:36,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:36,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035163223] [2021-06-05 14:58:36,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035163223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:36,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622353233] [2021-06-05 14:58:36,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:36,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:58:36,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:36,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:36,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:36,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622353233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:36,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:36,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:58:36,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245706186] [2021-06-05 14:58:36,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:58:36,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:36,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:58:36,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:58:36,855 INFO L87 Difference]: Start difference. First operand 50730 states and 111703 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:37,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:37,289 INFO L93 Difference]: Finished difference Result 53406 states and 116710 transitions. [2021-06-05 14:58:37,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:37,290 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:37,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:37,370 INFO L225 Difference]: With dead ends: 53406 [2021-06-05 14:58:37,371 INFO L226 Difference]: Without dead ends: 53388 [2021-06-05 14:58:37,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:37,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53388 states. [2021-06-05 14:58:38,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53388 to 45578. [2021-06-05 14:58:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45578 states, 45577 states have (on average 2.197402198477302) internal successors, (100151), 45577 states have internal predecessors, (100151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:38,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45578 states to 45578 states and 100151 transitions. [2021-06-05 14:58:38,160 INFO L78 Accepts]: Start accepts. Automaton has 45578 states and 100151 transitions. Word has length 56 [2021-06-05 14:58:38,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:38,160 INFO L482 AbstractCegarLoop]: Abstraction has 45578 states and 100151 transitions. [2021-06-05 14:58:38,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:38,161 INFO L276 IsEmpty]: Start isEmpty. Operand 45578 states and 100151 transitions. [2021-06-05 14:58:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:38,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:38,182 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:38,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 14:58:38,383 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:38,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:38,383 INFO L82 PathProgramCache]: Analyzing trace with hash -361343013, now seen corresponding path program 54 times [2021-06-05 14:58:38,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:38,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209214702] [2021-06-05 14:58:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 14:58:38,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:38,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209214702] [2021-06-05 14:58:38,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209214702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:38,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588998038] [2021-06-05 14:58:38,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:38,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:58:38,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:38,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:38,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 14:58:38,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588998038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:38,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:38,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:58:38,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299281015] [2021-06-05 14:58:38,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:58:38,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:38,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:58:38,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:58:38,542 INFO L87 Difference]: Start difference. First operand 45578 states and 100151 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:38,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:38,942 INFO L93 Difference]: Finished difference Result 49711 states and 108806 transitions. [2021-06-05 14:58:38,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:38,942 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:38,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:39,000 INFO L225 Difference]: With dead ends: 49711 [2021-06-05 14:58:39,000 INFO L226 Difference]: Without dead ends: 49645 [2021-06-05 14:58:39,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:58:39,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49645 states. [2021-06-05 14:58:39,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49645 to 48590. [2021-06-05 14:58:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48590 states, 48589 states have (on average 2.2018769680380332) internal successors, (106987), 48589 states have internal predecessors, (106987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48590 states to 48590 states and 106987 transitions. [2021-06-05 14:58:39,720 INFO L78 Accepts]: Start accepts. Automaton has 48590 states and 106987 transitions. Word has length 56 [2021-06-05 14:58:39,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:39,721 INFO L482 AbstractCegarLoop]: Abstraction has 48590 states and 106987 transitions. [2021-06-05 14:58:39,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 48590 states and 106987 transitions. [2021-06-05 14:58:39,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:39,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:39,746 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:39,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:39,946 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:39,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:39,947 INFO L82 PathProgramCache]: Analyzing trace with hash -378550939, now seen corresponding path program 55 times [2021-06-05 14:58:39,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:39,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178943937] [2021-06-05 14:58:39,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 14:58:39,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:39,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178943937] [2021-06-05 14:58:39,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178943937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:39,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576600278] [2021-06-05 14:58:39,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:40,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:40,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 14:58:40,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576600278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:40,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:40,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:40,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225445877] [2021-06-05 14:58:40,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:40,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:40,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:40,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:40,118 INFO L87 Difference]: Start difference. First operand 48590 states and 106987 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:40,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:40,314 INFO L93 Difference]: Finished difference Result 51903 states and 113860 transitions. [2021-06-05 14:58:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:58:40,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:40,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:40,372 INFO L225 Difference]: With dead ends: 51903 [2021-06-05 14:58:40,372 INFO L226 Difference]: Without dead ends: 51867 [2021-06-05 14:58:40,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:40,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51867 states. [2021-06-05 14:58:40,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51867 to 50962. [2021-06-05 14:58:41,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50962 states, 50961 states have (on average 2.2042542336296385) internal successors, (112331), 50961 states have internal predecessors, (112331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:41,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 112331 transitions. [2021-06-05 14:58:41,116 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 112331 transitions. Word has length 56 [2021-06-05 14:58:41,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:41,116 INFO L482 AbstractCegarLoop]: Abstraction has 50962 states and 112331 transitions. [2021-06-05 14:58:41,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 112331 transitions. [2021-06-05 14:58:41,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:41,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:41,141 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:41,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 14:58:41,345 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:41,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:41,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1368047205, now seen corresponding path program 56 times [2021-06-05 14:58:41,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:41,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351244924] [2021-06-05 14:58:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:41,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:41,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351244924] [2021-06-05 14:58:41,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351244924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:41,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151160396] [2021-06-05 14:58:41,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:41,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:41,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:41,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:41,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:41,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151160396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:41,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:41,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:41,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355777988] [2021-06-05 14:58:41,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:41,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:41,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:41,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:41,485 INFO L87 Difference]: Start difference. First operand 50962 states and 112331 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:41,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:41,909 INFO L93 Difference]: Finished difference Result 54564 states and 119631 transitions. [2021-06-05 14:58:41,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:41,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:41,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:41,966 INFO L225 Difference]: With dead ends: 54564 [2021-06-05 14:58:41,966 INFO L226 Difference]: Without dead ends: 54522 [2021-06-05 14:58:41,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54522 states. [2021-06-05 14:58:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54522 to 50922. [2021-06-05 14:58:42,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50922 states, 50921 states have (on average 2.2044932346183304) internal successors, (112255), 50921 states have internal predecessors, (112255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50922 states to 50922 states and 112255 transitions. [2021-06-05 14:58:42,880 INFO L78 Accepts]: Start accepts. Automaton has 50922 states and 112255 transitions. Word has length 56 [2021-06-05 14:58:42,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:42,880 INFO L482 AbstractCegarLoop]: Abstraction has 50922 states and 112255 transitions. [2021-06-05 14:58:42,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:42,881 INFO L276 IsEmpty]: Start isEmpty. Operand 50922 states and 112255 transitions. [2021-06-05 14:58:42,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:42,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:42,904 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:43,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:43,105 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:43,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:43,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1063321585, now seen corresponding path program 57 times [2021-06-05 14:58:43,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:43,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298075302] [2021-06-05 14:58:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:43,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:43,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298075302] [2021-06-05 14:58:43,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298075302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:43,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337222798] [2021-06-05 14:58:43,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:43,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:58:43,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:43,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:43,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:43,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337222798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:43,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:43,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:43,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910137261] [2021-06-05 14:58:43,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:43,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:43,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:43,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:43,241 INFO L87 Difference]: Start difference. First operand 50922 states and 112255 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:43,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:43,441 INFO L93 Difference]: Finished difference Result 54000 states and 117977 transitions. [2021-06-05 14:58:43,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:43,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:43,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:43,501 INFO L225 Difference]: With dead ends: 54000 [2021-06-05 14:58:43,501 INFO L226 Difference]: Without dead ends: 53998 [2021-06-05 14:58:43,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:43,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53998 states. [2021-06-05 14:58:44,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53998 to 51006. [2021-06-05 14:58:44,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51006 states, 51005 states have (on average 2.203842760513675) internal successors, (112407), 51005 states have internal predecessors, (112407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51006 states to 51006 states and 112407 transitions. [2021-06-05 14:58:44,296 INFO L78 Accepts]: Start accepts. Automaton has 51006 states and 112407 transitions. Word has length 56 [2021-06-05 14:58:44,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:44,297 INFO L482 AbstractCegarLoop]: Abstraction has 51006 states and 112407 transitions. [2021-06-05 14:58:44,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:44,297 INFO L276 IsEmpty]: Start isEmpty. Operand 51006 states and 112407 transitions. [2021-06-05 14:58:44,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:44,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:44,322 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:44,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 14:58:44,522 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:44,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:44,523 INFO L82 PathProgramCache]: Analyzing trace with hash -673117659, now seen corresponding path program 58 times [2021-06-05 14:58:44,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:44,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553646171] [2021-06-05 14:58:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:44,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:44,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553646171] [2021-06-05 14:58:44,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553646171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:44,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996457556] [2021-06-05 14:58:44,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:44,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:44,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:44,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:44,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:44,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996457556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:44,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:44,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:58:44,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32037635] [2021-06-05 14:58:44,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:58:44,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:44,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:58:44,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:58:44,672 INFO L87 Difference]: Start difference. First operand 51006 states and 112407 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:44,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:44,913 INFO L93 Difference]: Finished difference Result 57784 states and 125981 transitions. [2021-06-05 14:58:44,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:58:44,915 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:44,981 INFO L225 Difference]: With dead ends: 57784 [2021-06-05 14:58:44,981 INFO L226 Difference]: Without dead ends: 57782 [2021-06-05 14:58:44,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57782 states. [2021-06-05 14:58:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57782 to 51426. [2021-06-05 14:58:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51426 states, 51425 states have (on average 2.202566844919786) internal successors, (113267), 51425 states have internal predecessors, (113267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51426 states to 51426 states and 113267 transitions. [2021-06-05 14:58:46,071 INFO L78 Accepts]: Start accepts. Automaton has 51426 states and 113267 transitions. Word has length 56 [2021-06-05 14:58:46,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:46,071 INFO L482 AbstractCegarLoop]: Abstraction has 51426 states and 113267 transitions. [2021-06-05 14:58:46,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 51426 states and 113267 transitions. [2021-06-05 14:58:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:46,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:46,098 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:46,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 14:58:46,299 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:46,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:46,299 INFO L82 PathProgramCache]: Analyzing trace with hash 779747271, now seen corresponding path program 59 times [2021-06-05 14:58:46,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:46,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270822851] [2021-06-05 14:58:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:46,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:46,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270822851] [2021-06-05 14:58:46,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270822851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:46,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665303399] [2021-06-05 14:58:46,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:46,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:58:46,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:46,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:46,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:46,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665303399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:46,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:46,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:58:46,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278167488] [2021-06-05 14:58:46,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:58:46,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:46,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:58:46,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:58:46,450 INFO L87 Difference]: Start difference. First operand 51426 states and 113267 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:46,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:46,718 INFO L93 Difference]: Finished difference Result 56504 states and 123265 transitions. [2021-06-05 14:58:46,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:58:46,719 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:46,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:46,784 INFO L225 Difference]: With dead ends: 56504 [2021-06-05 14:58:46,784 INFO L226 Difference]: Without dead ends: 56502 [2021-06-05 14:58:46,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:58:46,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56502 states. [2021-06-05 14:58:47,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56502 to 51506. [2021-06-05 14:58:47,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51506 states, 51505 states have (on average 2.2005436365401416) internal successors, (113339), 51505 states have internal predecessors, (113339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:47,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51506 states to 51506 states and 113339 transitions. [2021-06-05 14:58:47,676 INFO L78 Accepts]: Start accepts. Automaton has 51506 states and 113339 transitions. Word has length 56 [2021-06-05 14:58:47,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:47,676 INFO L482 AbstractCegarLoop]: Abstraction has 51506 states and 113339 transitions. [2021-06-05 14:58:47,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:47,676 INFO L276 IsEmpty]: Start isEmpty. Operand 51506 states and 113339 transitions. [2021-06-05 14:58:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:47,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:47,702 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:47,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:47,905 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:47,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:47,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1081723995, now seen corresponding path program 60 times [2021-06-05 14:58:47,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:47,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155626253] [2021-06-05 14:58:47,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:47,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:47,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155626253] [2021-06-05 14:58:47,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155626253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:47,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737262143] [2021-06-05 14:58:47,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:47,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:58:47,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:47,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:47,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:48,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737262143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:48,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:48,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:58:48,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287982839] [2021-06-05 14:58:48,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:58:48,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:48,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:58:48,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:58:48,066 INFO L87 Difference]: Start difference. First operand 51506 states and 113339 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:48,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:48,310 INFO L93 Difference]: Finished difference Result 53832 states and 117559 transitions. [2021-06-05 14:58:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:48,310 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:48,370 INFO L225 Difference]: With dead ends: 53832 [2021-06-05 14:58:48,370 INFO L226 Difference]: Without dead ends: 53830 [2021-06-05 14:58:48,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:58:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53830 states. [2021-06-05 14:58:49,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53830 to 49874. [2021-06-05 14:58:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49874 states, 49873 states have (on average 2.2004892426763982) internal successors, (109745), 49873 states have internal predecessors, (109745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:49,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49874 states to 49874 states and 109745 transitions. [2021-06-05 14:58:49,137 INFO L78 Accepts]: Start accepts. Automaton has 49874 states and 109745 transitions. Word has length 56 [2021-06-05 14:58:49,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:49,137 INFO L482 AbstractCegarLoop]: Abstraction has 49874 states and 109745 transitions. [2021-06-05 14:58:49,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:49,137 INFO L276 IsEmpty]: Start isEmpty. Operand 49874 states and 109745 transitions. [2021-06-05 14:58:49,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:49,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:49,160 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:49,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:49,361 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:49,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:49,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2020283719, now seen corresponding path program 61 times [2021-06-05 14:58:49,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:49,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516263441] [2021-06-05 14:58:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:58:49,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:49,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516263441] [2021-06-05 14:58:49,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516263441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:49,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146667332] [2021-06-05 14:58:49,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:49,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:49,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:58:49,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146667332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:49,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:49,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:58:49,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383555741] [2021-06-05 14:58:49,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:58:49,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:49,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:58:49,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:58:49,516 INFO L87 Difference]: Start difference. First operand 49874 states and 109745 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:49,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:49,769 INFO L93 Difference]: Finished difference Result 51331 states and 112086 transitions. [2021-06-05 14:58:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:58:49,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:49,827 INFO L225 Difference]: With dead ends: 51331 [2021-06-05 14:58:49,827 INFO L226 Difference]: Without dead ends: 51235 [2021-06-05 14:58:49,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:58:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51235 states. [2021-06-05 14:58:50,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51235 to 47230. [2021-06-05 14:58:50,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.193673378644477) internal successors, (103605), 47229 states have internal predecessors, (103605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:50,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103605 transitions. [2021-06-05 14:58:50,600 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103605 transitions. Word has length 56 [2021-06-05 14:58:50,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:50,601 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103605 transitions. [2021-06-05 14:58:50,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:50,601 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103605 transitions. [2021-06-05 14:58:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:50,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:50,625 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:50,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 14:58:50,826 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:50,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:50,826 INFO L82 PathProgramCache]: Analyzing trace with hash 517101275, now seen corresponding path program 62 times [2021-06-05 14:58:50,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:50,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480065462] [2021-06-05 14:58:50,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:58:50,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:50,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480065462] [2021-06-05 14:58:50,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480065462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:50,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830873297] [2021-06-05 14:58:50,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:50,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:50,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:50,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:50,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:58:50,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830873297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:50,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:50,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:58:50,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172178411] [2021-06-05 14:58:50,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:58:50,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:50,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:58:50,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:58:50,988 INFO L87 Difference]: Start difference. First operand 47230 states and 103605 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:51,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:51,388 INFO L93 Difference]: Finished difference Result 48435 states and 105506 transitions. [2021-06-05 14:58:51,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:58:51,389 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:51,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:51,437 INFO L225 Difference]: With dead ends: 48435 [2021-06-05 14:58:51,437 INFO L226 Difference]: Without dead ends: 48369 [2021-06-05 14:58:51,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:51,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48369 states. [2021-06-05 14:58:51,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48369 to 47230. [2021-06-05 14:58:51,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.1912172605814226) internal successors, (103489), 47229 states have internal predecessors, (103489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103489 transitions. [2021-06-05 14:58:52,055 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103489 transitions. Word has length 56 [2021-06-05 14:58:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:52,055 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103489 transitions. [2021-06-05 14:58:52,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:52,055 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103489 transitions. [2021-06-05 14:58:52,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:52,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:52,080 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:52,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:52,281 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:52,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1809607417, now seen corresponding path program 63 times [2021-06-05 14:58:52,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:52,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692583259] [2021-06-05 14:58:52,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:58:52,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:52,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692583259] [2021-06-05 14:58:52,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692583259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:52,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957395691] [2021-06-05 14:58:52,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:52,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:58:52,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:52,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:52,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:58:52,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957395691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:52,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:52,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:58:52,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578911584] [2021-06-05 14:58:52,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:58:52,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:52,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:58:52,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:58:52,439 INFO L87 Difference]: Start difference. First operand 47230 states and 103489 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:52,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:52,778 INFO L93 Difference]: Finished difference Result 48187 states and 104966 transitions. [2021-06-05 14:58:52,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:58:52,779 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:52,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:52,825 INFO L225 Difference]: With dead ends: 48187 [2021-06-05 14:58:52,825 INFO L226 Difference]: Without dead ends: 48151 [2021-06-05 14:58:52,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:58:52,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48151 states. [2021-06-05 14:58:53,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48151 to 47230. [2021-06-05 14:58:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.1896927735078022) internal successors, (103417), 47229 states have internal predecessors, (103417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103417 transitions. [2021-06-05 14:58:53,394 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103417 transitions. Word has length 56 [2021-06-05 14:58:53,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:53,394 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103417 transitions. [2021-06-05 14:58:53,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:53,394 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103417 transitions. [2021-06-05 14:58:53,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:53,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:53,625 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:53,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 14:58:53,841 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:53,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2068840347, now seen corresponding path program 64 times [2021-06-05 14:58:53,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:53,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648830108] [2021-06-05 14:58:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:53,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:53,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648830108] [2021-06-05 14:58:53,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648830108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:53,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411916233] [2021-06-05 14:58:53,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:53,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:53,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:53,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:53,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:53,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411916233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:53,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:53,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:53,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888047577] [2021-06-05 14:58:53,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:53,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:53,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:53,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:53,971 INFO L87 Difference]: Start difference. First operand 47230 states and 103417 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:54,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:54,172 INFO L93 Difference]: Finished difference Result 51250 states and 111816 transitions. [2021-06-05 14:58:54,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:54,172 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:54,228 INFO L225 Difference]: With dead ends: 51250 [2021-06-05 14:58:54,228 INFO L226 Difference]: Without dead ends: 51244 [2021-06-05 14:58:54,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:54,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51244 states. [2021-06-05 14:58:54,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51244 to 50262. [2021-06-05 14:58:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50262 states, 50261 states have (on average 2.194723543104992) internal successors, (110309), 50261 states have internal predecessors, (110309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:55,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50262 states to 50262 states and 110309 transitions. [2021-06-05 14:58:55,068 INFO L78 Accepts]: Start accepts. Automaton has 50262 states and 110309 transitions. Word has length 56 [2021-06-05 14:58:55,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:55,068 INFO L482 AbstractCegarLoop]: Abstraction has 50262 states and 110309 transitions. [2021-06-05 14:58:55,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:55,068 INFO L276 IsEmpty]: Start isEmpty. Operand 50262 states and 110309 transitions. [2021-06-05 14:58:55,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:55,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:55,095 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:55,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:55,295 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:55,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:55,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1921401329, now seen corresponding path program 65 times [2021-06-05 14:58:55,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:55,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981191344] [2021-06-05 14:58:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:55,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:55,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981191344] [2021-06-05 14:58:55,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981191344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:55,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421414609] [2021-06-05 14:58:55,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:55,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 14:58:55,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:55,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:55,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421414609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:55,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:55,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:58:55,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767520466] [2021-06-05 14:58:55,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:58:55,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:55,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:58:55,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:58:55,446 INFO L87 Difference]: Start difference. First operand 50262 states and 110309 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:55,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:55,635 INFO L93 Difference]: Finished difference Result 52650 states and 114688 transitions. [2021-06-05 14:58:55,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:58:55,636 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:55,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:55,694 INFO L225 Difference]: With dead ends: 52650 [2021-06-05 14:58:55,694 INFO L226 Difference]: Without dead ends: 52650 [2021-06-05 14:58:55,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:58:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52650 states. [2021-06-05 14:58:56,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52650 to 50294. [2021-06-05 14:58:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50294 states, 50293 states have (on average 2.1945996460740065) internal successors, (110373), 50293 states have internal predecessors, (110373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:56,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50294 states to 50294 states and 110373 transitions. [2021-06-05 14:58:56,562 INFO L78 Accepts]: Start accepts. Automaton has 50294 states and 110373 transitions. Word has length 56 [2021-06-05 14:58:56,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:56,562 INFO L482 AbstractCegarLoop]: Abstraction has 50294 states and 110373 transitions. [2021-06-05 14:58:56,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:56,563 INFO L276 IsEmpty]: Start isEmpty. Operand 50294 states and 110373 transitions. [2021-06-05 14:58:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:56,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:56,597 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:56,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 14:58:56,797 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:56,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:56,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1531197403, now seen corresponding path program 66 times [2021-06-05 14:58:56,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:56,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164951971] [2021-06-05 14:58:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:56,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:56,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164951971] [2021-06-05 14:58:56,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164951971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:56,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770556122] [2021-06-05 14:58:56,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:56,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:58:56,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:56,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:56,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:56,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770556122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:56,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:56,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:58:56,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490692609] [2021-06-05 14:58:56,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:58:56,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:56,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:58:56,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:58:56,964 INFO L87 Difference]: Start difference. First operand 50294 states and 110373 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:57,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:57,259 INFO L93 Difference]: Finished difference Result 56418 states and 122592 transitions. [2021-06-05 14:58:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:58:57,260 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:57,325 INFO L225 Difference]: With dead ends: 56418 [2021-06-05 14:58:57,325 INFO L226 Difference]: Without dead ends: 56418 [2021-06-05 14:58:57,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:57,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56418 states. [2021-06-05 14:58:58,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56418 to 50454. [2021-06-05 14:58:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50454 states, 50453 states have (on average 2.193982518383446) internal successors, (110693), 50453 states have internal predecessors, (110693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50454 states to 50454 states and 110693 transitions. [2021-06-05 14:58:58,258 INFO L78 Accepts]: Start accepts. Automaton has 50454 states and 110693 transitions. Word has length 56 [2021-06-05 14:58:58,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:58,258 INFO L482 AbstractCegarLoop]: Abstraction has 50454 states and 110693 transitions. [2021-06-05 14:58:58,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 50454 states and 110693 transitions. [2021-06-05 14:58:58,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:58,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:58,286 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:58,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:58,486 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:58,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:58,487 INFO L82 PathProgramCache]: Analyzing trace with hash -78332473, now seen corresponding path program 67 times [2021-06-05 14:58:58,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:58,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43860085] [2021-06-05 14:58:58,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:58,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:58,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43860085] [2021-06-05 14:58:58,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43860085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:58,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87838213] [2021-06-05 14:58:58,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:58,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:58:58,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:58,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87838213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:58,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:58,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:58:58,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17219451] [2021-06-05 14:58:58,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:58:58,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:58,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:58:58,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:58:58,644 INFO L87 Difference]: Start difference. First operand 50454 states and 110693 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:58,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:58,909 INFO L93 Difference]: Finished difference Result 56662 states and 123166 transitions. [2021-06-05 14:58:58,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:58:58,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:58:58,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:58,975 INFO L225 Difference]: With dead ends: 56662 [2021-06-05 14:58:58,975 INFO L226 Difference]: Without dead ends: 56662 [2021-06-05 14:58:58,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:58:59,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56662 states. [2021-06-05 14:58:59,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56662 to 50614. [2021-06-05 14:58:59,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50614 states, 50613 states have (on average 2.1933692924742654) internal successors, (111013), 50613 states have internal predecessors, (111013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:59,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50614 states to 50614 states and 111013 transitions. [2021-06-05 14:58:59,861 INFO L78 Accepts]: Start accepts. Automaton has 50614 states and 111013 transitions. Word has length 56 [2021-06-05 14:58:59,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:59,861 INFO L482 AbstractCegarLoop]: Abstraction has 50614 states and 111013 transitions. [2021-06-05 14:58:59,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:59,861 INFO L276 IsEmpty]: Start isEmpty. Operand 50614 states and 111013 transitions. [2021-06-05 14:58:59,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:58:59,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:59,887 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:00,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 14:59:00,087 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:00,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:00,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1939803739, now seen corresponding path program 68 times [2021-06-05 14:59:00,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:00,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566976599] [2021-06-05 14:59:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:00,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:00,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566976599] [2021-06-05 14:59:00,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566976599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:00,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837746960] [2021-06-05 14:59:00,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:00,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:00,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:00,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:59:00,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:00,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837746960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:00,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:00,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:59:00,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646249617] [2021-06-05 14:59:00,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:59:00,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:00,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:59:00,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:59:00,233 INFO L87 Difference]: Start difference. First operand 50614 states and 111013 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:00,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:00,506 INFO L93 Difference]: Finished difference Result 54674 states and 118916 transitions. [2021-06-05 14:59:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:59:00,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:59:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:00,565 INFO L225 Difference]: With dead ends: 54674 [2021-06-05 14:59:00,565 INFO L226 Difference]: Without dead ends: 54674 [2021-06-05 14:59:00,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:59:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54674 states. [2021-06-05 14:59:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54674 to 50774. [2021-06-05 14:59:01,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50774 states, 50773 states have (on average 2.192759931459634) internal successors, (111333), 50773 states have internal predecessors, (111333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:01,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50774 states to 50774 states and 111333 transitions. [2021-06-05 14:59:01,424 INFO L78 Accepts]: Start accepts. Automaton has 50774 states and 111333 transitions. Word has length 56 [2021-06-05 14:59:01,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:01,424 INFO L482 AbstractCegarLoop]: Abstraction has 50774 states and 111333 transitions. [2021-06-05 14:59:01,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:01,424 INFO L276 IsEmpty]: Start isEmpty. Operand 50774 states and 111333 transitions. [2021-06-05 14:59:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 14:59:01,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:01,450 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:01,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:01,650 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:01,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:01,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1664826169, now seen corresponding path program 69 times [2021-06-05 14:59:01,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:01,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970520330] [2021-06-05 14:59:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:01,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:01,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970520330] [2021-06-05 14:59:01,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970520330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:01,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254003879] [2021-06-05 14:59:01,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:01,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 14:59:01,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:01,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:59:01,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:01,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254003879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:01,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:01,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 14:59:01,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957055528] [2021-06-05 14:59:01,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:59:01,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:01,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:59:01,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:59:01,806 INFO L87 Difference]: Start difference. First operand 50774 states and 111333 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:02,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:02,117 INFO L93 Difference]: Finished difference Result 52880 states and 115293 transitions. [2021-06-05 14:59:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:59:02,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 14:59:02,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:02,181 INFO L225 Difference]: With dead ends: 52880 [2021-06-05 14:59:02,181 INFO L226 Difference]: Without dead ends: 52880 [2021-06-05 14:59:02,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:59:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52880 states. [2021-06-05 14:59:03,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52880 to 49354. [2021-06-05 14:59:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49354 states, 49353 states have (on average 2.193686300731465) internal successors, (108265), 49353 states have internal predecessors, (108265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49354 states to 49354 states and 108265 transitions. [2021-06-05 14:59:03,127 INFO L78 Accepts]: Start accepts. Automaton has 49354 states and 108265 transitions. Word has length 56 [2021-06-05 14:59:03,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:03,127 INFO L482 AbstractCegarLoop]: Abstraction has 49354 states and 108265 transitions. [2021-06-05 14:59:03,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:03,127 INFO L276 IsEmpty]: Start isEmpty. Operand 49354 states and 108265 transitions. [2021-06-05 14:59:03,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:03,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:03,164 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:03,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:03,365 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:03,365 INFO L82 PathProgramCache]: Analyzing trace with hash -418208773, now seen corresponding path program 70 times [2021-06-05 14:59:03,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:03,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511773669] [2021-06-05 14:59:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:03,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:03,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511773669] [2021-06-05 14:59:03,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511773669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:03,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676516124] [2021-06-05 14:59:03,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:03,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:03,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:03,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:03,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:03,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676516124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:03,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:03,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 14:59:03,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887231306] [2021-06-05 14:59:03,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:59:03,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:03,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:59:03,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:59:03,596 INFO L87 Difference]: Start difference. First operand 49354 states and 108265 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:04,356 INFO L93 Difference]: Finished difference Result 55302 states and 120443 transitions. [2021-06-05 14:59:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:59:04,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:04,459 INFO L225 Difference]: With dead ends: 55302 [2021-06-05 14:59:04,460 INFO L226 Difference]: Without dead ends: 55302 [2021-06-05 14:59:04,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 175.9ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:59:04,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55302 states. [2021-06-05 14:59:04,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55302 to 49998. [2021-06-05 14:59:04,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49998 states, 49997 states have (on average 2.195831749904994) internal successors, (109785), 49997 states have internal predecessors, (109785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49998 states to 49998 states and 109785 transitions. [2021-06-05 14:59:05,035 INFO L78 Accepts]: Start accepts. Automaton has 49998 states and 109785 transitions. Word has length 66 [2021-06-05 14:59:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:05,036 INFO L482 AbstractCegarLoop]: Abstraction has 49998 states and 109785 transitions. [2021-06-05 14:59:05,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 49998 states and 109785 transitions. [2021-06-05 14:59:05,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:05,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:05,071 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:05,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:05,272 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:05,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:05,272 INFO L82 PathProgramCache]: Analyzing trace with hash -12185795, now seen corresponding path program 71 times [2021-06-05 14:59:05,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:05,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381613562] [2021-06-05 14:59:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:05,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:05,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381613562] [2021-06-05 14:59:05,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381613562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:05,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209264502] [2021-06-05 14:59:05,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:05,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:59:05,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:05,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:05,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:05,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209264502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:05,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:05,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:59:05,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835611455] [2021-06-05 14:59:05,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:59:05,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:05,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:59:05,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:59:05,445 INFO L87 Difference]: Start difference. First operand 49998 states and 109785 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:05,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:05,900 INFO L93 Difference]: Finished difference Result 51084 states and 111615 transitions. [2021-06-05 14:59:05,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:59:05,901 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:05,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:05,954 INFO L225 Difference]: With dead ends: 51084 [2021-06-05 14:59:05,954 INFO L226 Difference]: Without dead ends: 51076 [2021-06-05 14:59:05,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:06,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51076 states. [2021-06-05 14:59:06,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51076 to 49894. [2021-06-05 14:59:06,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49894 states, 49893 states have (on average 2.193995149620187) internal successors, (109465), 49893 states have internal predecessors, (109465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:06,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49894 states to 49894 states and 109465 transitions. [2021-06-05 14:59:06,526 INFO L78 Accepts]: Start accepts. Automaton has 49894 states and 109465 transitions. Word has length 66 [2021-06-05 14:59:06,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:06,526 INFO L482 AbstractCegarLoop]: Abstraction has 49894 states and 109465 transitions. [2021-06-05 14:59:06,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:06,526 INFO L276 IsEmpty]: Start isEmpty. Operand 49894 states and 109465 transitions. [2021-06-05 14:59:06,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:06,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:06,561 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:06,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:06,763 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:06,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1308699737, now seen corresponding path program 72 times [2021-06-05 14:59:06,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:06,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088542175] [2021-06-05 14:59:06,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:06,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:06,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088542175] [2021-06-05 14:59:06,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088542175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:06,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577501039] [2021-06-05 14:59:06,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:06,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:59:06,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:06,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:06,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:06,960 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:06,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577501039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:06,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:06,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:59:06,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85716786] [2021-06-05 14:59:06,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:59:06,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:06,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:59:06,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:59:06,961 INFO L87 Difference]: Start difference. First operand 49894 states and 109465 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:07,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:07,414 INFO L93 Difference]: Finished difference Result 58739 states and 127815 transitions. [2021-06-05 14:59:07,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:59:07,414 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:07,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:07,505 INFO L225 Difference]: With dead ends: 58739 [2021-06-05 14:59:07,505 INFO L226 Difference]: Without dead ends: 58739 [2021-06-05 14:59:07,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:07,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58739 states. [2021-06-05 14:59:08,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58739 to 53954. [2021-06-05 14:59:08,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53954 states, 53953 states have (on average 2.204678145793561) internal successors, (118949), 53953 states have internal predecessors, (118949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53954 states to 53954 states and 118949 transitions. [2021-06-05 14:59:08,179 INFO L78 Accepts]: Start accepts. Automaton has 53954 states and 118949 transitions. Word has length 66 [2021-06-05 14:59:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:08,179 INFO L482 AbstractCegarLoop]: Abstraction has 53954 states and 118949 transitions. [2021-06-05 14:59:08,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:08,179 INFO L276 IsEmpty]: Start isEmpty. Operand 53954 states and 118949 transitions. [2021-06-05 14:59:08,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:08,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:08,427 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:08,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:08,628 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:08,628 INFO L82 PathProgramCache]: Analyzing trace with hash -138643737, now seen corresponding path program 73 times [2021-06-05 14:59:08,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:08,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888894420] [2021-06-05 14:59:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:08,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:08,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888894420] [2021-06-05 14:59:08,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888894420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:08,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944742388] [2021-06-05 14:59:08,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:08,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:08,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:08,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944742388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:08,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:08,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:59:08,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987676145] [2021-06-05 14:59:08,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:59:08,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:08,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:59:08,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:59:08,788 INFO L87 Difference]: Start difference. First operand 53954 states and 118949 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:09,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:09,045 INFO L93 Difference]: Finished difference Result 56467 states and 123155 transitions. [2021-06-05 14:59:09,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:59:09,046 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:09,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:09,111 INFO L225 Difference]: With dead ends: 56467 [2021-06-05 14:59:09,111 INFO L226 Difference]: Without dead ends: 56375 [2021-06-05 14:59:09,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:09,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56375 states. [2021-06-05 14:59:09,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56375 to 51614. [2021-06-05 14:59:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51614 states, 51613 states have (on average 2.1976827543448354) internal successors, (113429), 51613 states have internal predecessors, (113429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:10,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113429 transitions. [2021-06-05 14:59:10,047 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113429 transitions. Word has length 66 [2021-06-05 14:59:10,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:10,047 INFO L482 AbstractCegarLoop]: Abstraction has 51614 states and 113429 transitions. [2021-06-05 14:59:10,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:10,047 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113429 transitions. [2021-06-05 14:59:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:10,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:10,084 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:10,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:10,284 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:10,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:10,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1619583693, now seen corresponding path program 74 times [2021-06-05 14:59:10,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:10,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079589625] [2021-06-05 14:59:10,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:10,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:10,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079589625] [2021-06-05 14:59:10,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079589625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:10,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862134974] [2021-06-05 14:59:10,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:10,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:10,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:10,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:10,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:10,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862134974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:10,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:10,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:59:10,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252509232] [2021-06-05 14:59:10,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:59:10,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:10,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:59:10,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:59:10,436 INFO L87 Difference]: Start difference. First operand 51614 states and 113429 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:10,693 INFO L93 Difference]: Finished difference Result 53573 states and 116784 transitions. [2021-06-05 14:59:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:59:10,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:10,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:10,752 INFO L225 Difference]: With dead ends: 53573 [2021-06-05 14:59:10,752 INFO L226 Difference]: Without dead ends: 53525 [2021-06-05 14:59:10,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53525 states. [2021-06-05 14:59:11,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53525 to 51614. [2021-06-05 14:59:11,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51614 states, 51613 states have (on average 2.196520256524519) internal successors, (113369), 51613 states have internal predecessors, (113369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113369 transitions. [2021-06-05 14:59:11,639 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113369 transitions. Word has length 66 [2021-06-05 14:59:11,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:11,639 INFO L482 AbstractCegarLoop]: Abstraction has 51614 states and 113369 transitions. [2021-06-05 14:59:11,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:11,639 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113369 transitions. [2021-06-05 14:59:11,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:11,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:11,674 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:11,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:11,874 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:11,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:11,875 INFO L82 PathProgramCache]: Analyzing trace with hash -607697029, now seen corresponding path program 75 times [2021-06-05 14:59:11,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:11,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397339655] [2021-06-05 14:59:11,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:59:11,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:11,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397339655] [2021-06-05 14:59:11,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397339655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:11,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500726757] [2021-06-05 14:59:11,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:11,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:59:11,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:11,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:11,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:59:12,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500726757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:12,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:12,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:59:12,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916185110] [2021-06-05 14:59:12,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:59:12,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:12,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:59:12,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:59:12,060 INFO L87 Difference]: Start difference. First operand 51614 states and 113369 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:12,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:12,372 INFO L93 Difference]: Finished difference Result 66038 states and 143412 transitions. [2021-06-05 14:59:12,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:59:12,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 14:59:12,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:12,473 INFO L225 Difference]: With dead ends: 66038 [2021-06-05 14:59:12,473 INFO L226 Difference]: Without dead ends: 66011 [2021-06-05 14:59:12,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66011 states. [2021-06-05 14:59:13,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66011 to 55054. [2021-06-05 14:59:13,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55054 states, 55053 states have (on average 2.1976822334840973) internal successors, (120989), 55053 states have internal predecessors, (120989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55054 states to 55054 states and 120989 transitions. [2021-06-05 14:59:13,431 INFO L78 Accepts]: Start accepts. Automaton has 55054 states and 120989 transitions. Word has length 66 [2021-06-05 14:59:13,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:13,431 INFO L482 AbstractCegarLoop]: Abstraction has 55054 states and 120989 transitions. [2021-06-05 14:59:13,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:13,431 INFO L276 IsEmpty]: Start isEmpty. Operand 55054 states and 120989 transitions. [2021-06-05 14:59:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:13,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:13,469 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:13,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 14:59:13,669 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:13,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:13,670 INFO L82 PathProgramCache]: Analyzing trace with hash -321373819, now seen corresponding path program 76 times [2021-06-05 14:59:13,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:13,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774637949] [2021-06-05 14:59:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:13,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:13,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774637949] [2021-06-05 14:59:13,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774637949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:13,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891926306] [2021-06-05 14:59:13,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:13,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:13,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:13,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:13,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:13,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891926306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:13,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:13,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:59:13,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432995270] [2021-06-05 14:59:13,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:59:13,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:13,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:59:13,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:59:13,843 INFO L87 Difference]: Start difference. First operand 55054 states and 120989 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:14,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:14,088 INFO L93 Difference]: Finished difference Result 64613 states and 140751 transitions. [2021-06-05 14:59:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:59:14,088 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:14,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:14,169 INFO L225 Difference]: With dead ends: 64613 [2021-06-05 14:59:14,169 INFO L226 Difference]: Without dead ends: 64613 [2021-06-05 14:59:14,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:14,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64613 states. [2021-06-05 14:59:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64613 to 59214. [2021-06-05 14:59:15,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59214 states, 59213 states have (on average 2.2070322395419923) internal successors, (130685), 59213 states have internal predecessors, (130685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:15,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59214 states to 59214 states and 130685 transitions. [2021-06-05 14:59:15,304 INFO L78 Accepts]: Start accepts. Automaton has 59214 states and 130685 transitions. Word has length 66 [2021-06-05 14:59:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:15,304 INFO L482 AbstractCegarLoop]: Abstraction has 59214 states and 130685 transitions. [2021-06-05 14:59:15,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:15,304 INFO L276 IsEmpty]: Start isEmpty. Operand 59214 states and 130685 transitions. [2021-06-05 14:59:15,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:15,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:15,339 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:15,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:15,539 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:15,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:15,539 INFO L82 PathProgramCache]: Analyzing trace with hash 848682181, now seen corresponding path program 77 times [2021-06-05 14:59:15,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:15,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981235860] [2021-06-05 14:59:15,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:15,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:15,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981235860] [2021-06-05 14:59:15,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981235860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:15,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735126954] [2021-06-05 14:59:15,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:15,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 14:59:15,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:15,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:15,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:15,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735126954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:15,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:15,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:59:15,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720127987] [2021-06-05 14:59:15,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:59:15,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:15,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:59:15,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:59:15,708 INFO L87 Difference]: Start difference. First operand 59214 states and 130685 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:15,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:15,965 INFO L93 Difference]: Finished difference Result 61966 states and 135259 transitions. [2021-06-05 14:59:15,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:59:15,965 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:15,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:16,039 INFO L225 Difference]: With dead ends: 61966 [2021-06-05 14:59:16,039 INFO L226 Difference]: Without dead ends: 61870 [2021-06-05 14:59:16,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:16,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61870 states. [2021-06-05 14:59:16,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61870 to 56914. [2021-06-05 14:59:17,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56914 states, 56913 states have (on average 2.2002178764078506) internal successors, (125221), 56913 states have internal predecessors, (125221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:17,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56914 states to 56914 states and 125221 transitions. [2021-06-05 14:59:17,107 INFO L78 Accepts]: Start accepts. Automaton has 56914 states and 125221 transitions. Word has length 66 [2021-06-05 14:59:17,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:17,107 INFO L482 AbstractCegarLoop]: Abstraction has 56914 states and 125221 transitions. [2021-06-05 14:59:17,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:17,108 INFO L276 IsEmpty]: Start isEmpty. Operand 56914 states and 125221 transitions. [2021-06-05 14:59:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:17,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:17,145 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:17,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 14:59:17,346 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:17,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:17,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1688057685, now seen corresponding path program 78 times [2021-06-05 14:59:17,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:17,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723924989] [2021-06-05 14:59:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:17,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:17,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723924989] [2021-06-05 14:59:17,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723924989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:17,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949753792] [2021-06-05 14:59:17,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:17,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:59:17,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:17,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:17,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:17,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949753792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:17,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:17,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:59:17,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887799655] [2021-06-05 14:59:17,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:59:17,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:17,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:59:17,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:59:17,497 INFO L87 Difference]: Start difference. First operand 56914 states and 125221 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:18,014 INFO L93 Difference]: Finished difference Result 59554 states and 129655 transitions. [2021-06-05 14:59:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:59:18,014 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:18,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:18,088 INFO L225 Difference]: With dead ends: 59554 [2021-06-05 14:59:18,089 INFO L226 Difference]: Without dead ends: 59458 [2021-06-05 14:59:18,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:18,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59458 states. [2021-06-05 14:59:18,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59458 to 56894. [2021-06-05 14:59:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56894 states, 56893 states have (on average 2.1983548063909444) internal successors, (125071), 56893 states have internal predecessors, (125071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56894 states to 56894 states and 125071 transitions. [2021-06-05 14:59:19,141 INFO L78 Accepts]: Start accepts. Automaton has 56894 states and 125071 transitions. Word has length 66 [2021-06-05 14:59:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:19,141 INFO L482 AbstractCegarLoop]: Abstraction has 56894 states and 125071 transitions. [2021-06-05 14:59:19,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 56894 states and 125071 transitions. [2021-06-05 14:59:19,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:19,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:19,188 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:19,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:19,388 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:19,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:19,388 INFO L82 PathProgramCache]: Analyzing trace with hash -326026235, now seen corresponding path program 79 times [2021-06-05 14:59:19,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:19,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160566887] [2021-06-05 14:59:19,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:19,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:19,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160566887] [2021-06-05 14:59:19,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160566887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:19,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102883578] [2021-06-05 14:59:19,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:19,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:19,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:19,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102883578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:19,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:19,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:59:19,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555894741] [2021-06-05 14:59:19,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:59:19,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:19,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:59:19,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:59:19,538 INFO L87 Difference]: Start difference. First operand 56894 states and 125071 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:19,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:19,820 INFO L93 Difference]: Finished difference Result 59114 states and 128843 transitions. [2021-06-05 14:59:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:59:19,821 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:19,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:19,893 INFO L225 Difference]: With dead ends: 59114 [2021-06-05 14:59:19,893 INFO L226 Difference]: Without dead ends: 58982 [2021-06-05 14:59:19,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:59:19,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58982 states. [2021-06-05 14:59:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58982 to 56922. [2021-06-05 14:59:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56922 states, 56921 states have (on average 2.1963950036014825) internal successors, (125021), 56921 states have internal predecessors, (125021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:20,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56922 states to 56922 states and 125021 transitions. [2021-06-05 14:59:20,853 INFO L78 Accepts]: Start accepts. Automaton has 56922 states and 125021 transitions. Word has length 66 [2021-06-05 14:59:20,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:20,853 INFO L482 AbstractCegarLoop]: Abstraction has 56922 states and 125021 transitions. [2021-06-05 14:59:20,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:20,854 INFO L276 IsEmpty]: Start isEmpty. Operand 56922 states and 125021 transitions. [2021-06-05 14:59:20,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:20,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:20,891 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:21,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:21,092 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:21,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:21,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1465776773, now seen corresponding path program 80 times [2021-06-05 14:59:21,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:21,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39491767] [2021-06-05 14:59:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:59:21,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:21,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39491767] [2021-06-05 14:59:21,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39491767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:21,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078019600] [2021-06-05 14:59:21,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:21,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:21,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:21,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:21,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:59:21,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078019600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:21,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:21,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:59:21,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332967488] [2021-06-05 14:59:21,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:59:21,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:21,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:59:21,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:59:21,267 INFO L87 Difference]: Start difference. First operand 56922 states and 125021 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:21,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:21,523 INFO L93 Difference]: Finished difference Result 69297 states and 150869 transitions. [2021-06-05 14:59:21,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:59:21,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 14:59:21,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:21,598 INFO L225 Difference]: With dead ends: 69297 [2021-06-05 14:59:21,598 INFO L226 Difference]: Without dead ends: 69270 [2021-06-05 14:59:21,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:59:21,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69270 states. [2021-06-05 14:59:22,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69270 to 56622. [2021-06-05 14:59:22,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56622 states, 56621 states have (on average 2.1971529997704033) internal successors, (124405), 56621 states have internal predecessors, (124405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:22,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56622 states to 56622 states and 124405 transitions. [2021-06-05 14:59:22,581 INFO L78 Accepts]: Start accepts. Automaton has 56622 states and 124405 transitions. Word has length 66 [2021-06-05 14:59:22,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:22,581 INFO L482 AbstractCegarLoop]: Abstraction has 56622 states and 124405 transitions. [2021-06-05 14:59:22,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:22,582 INFO L276 IsEmpty]: Start isEmpty. Operand 56622 states and 124405 transitions. [2021-06-05 14:59:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:22,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:22,621 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:22,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:22,821 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:22,822 INFO L82 PathProgramCache]: Analyzing trace with hash -904475993, now seen corresponding path program 81 times [2021-06-05 14:59:22,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:22,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844455329] [2021-06-05 14:59:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:22,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:22,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844455329] [2021-06-05 14:59:22,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844455329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:22,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005116884] [2021-06-05 14:59:22,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:22,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 14:59:22,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:22,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:22,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:22,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005116884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:22,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:22,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:59:22,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044682441] [2021-06-05 14:59:22,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:59:22,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:22,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:59:22,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:59:22,982 INFO L87 Difference]: Start difference. First operand 56622 states and 124405 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:23,232 INFO L93 Difference]: Finished difference Result 67026 states and 146165 transitions. [2021-06-05 14:59:23,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:59:23,233 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:23,313 INFO L225 Difference]: With dead ends: 67026 [2021-06-05 14:59:23,313 INFO L226 Difference]: Without dead ends: 67023 [2021-06-05 14:59:23,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:23,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67023 states. [2021-06-05 14:59:24,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67023 to 62354. [2021-06-05 14:59:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62354 states, 62353 states have (on average 2.206229050727311) internal successors, (137565), 62353 states have internal predecessors, (137565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:24,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62354 states to 62354 states and 137565 transitions. [2021-06-05 14:59:24,397 INFO L78 Accepts]: Start accepts. Automaton has 62354 states and 137565 transitions. Word has length 66 [2021-06-05 14:59:24,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:24,397 INFO L482 AbstractCegarLoop]: Abstraction has 62354 states and 137565 transitions. [2021-06-05 14:59:24,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand 62354 states and 137565 transitions. [2021-06-05 14:59:24,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:24,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:24,436 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:24,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:24,636 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:24,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:24,637 INFO L82 PathProgramCache]: Analyzing trace with hash 265580007, now seen corresponding path program 82 times [2021-06-05 14:59:24,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:24,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967666126] [2021-06-05 14:59:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:24,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:24,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967666126] [2021-06-05 14:59:24,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967666126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:24,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163931143] [2021-06-05 14:59:24,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:24,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:24,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:24,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:24,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:24,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163931143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:24,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:24,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:59:24,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145891619] [2021-06-05 14:59:24,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:59:24,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:24,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:59:24,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:59:24,789 INFO L87 Difference]: Start difference. First operand 62354 states and 137565 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:25,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:25,047 INFO L93 Difference]: Finished difference Result 65089 states and 142128 transitions. [2021-06-05 14:59:25,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:59:25,048 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:25,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:25,119 INFO L225 Difference]: With dead ends: 65089 [2021-06-05 14:59:25,119 INFO L226 Difference]: Without dead ends: 65029 [2021-06-05 14:59:25,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:25,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65029 states. [2021-06-05 14:59:26,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65029 to 59590. [2021-06-05 14:59:26,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.20163117353874) internal successors, (131193), 59589 states have internal predecessors, (131193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:26,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 131193 transitions. [2021-06-05 14:59:26,239 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 131193 transitions. Word has length 66 [2021-06-05 14:59:26,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:26,239 INFO L482 AbstractCegarLoop]: Abstraction has 59590 states and 131193 transitions. [2021-06-05 14:59:26,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:26,240 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 131193 transitions. [2021-06-05 14:59:26,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:26,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:26,280 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:26,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:26,482 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:26,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:26,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2023807437, now seen corresponding path program 83 times [2021-06-05 14:59:26,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:26,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730238539] [2021-06-05 14:59:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:26,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:26,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730238539] [2021-06-05 14:59:26,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730238539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:26,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648227381] [2021-06-05 14:59:26,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:26,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 14:59:26,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:26,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:26,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:26,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648227381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:26,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:26,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:59:26,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92932143] [2021-06-05 14:59:26,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:59:26,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:26,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:59:26,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:59:26,980 INFO L87 Difference]: Start difference. First operand 59590 states and 131193 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:27,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:27,277 INFO L93 Difference]: Finished difference Result 62315 states and 135765 transitions. [2021-06-05 14:59:27,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:59:27,289 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:27,379 INFO L225 Difference]: With dead ends: 62315 [2021-06-05 14:59:27,379 INFO L226 Difference]: Without dead ends: 62243 [2021-06-05 14:59:27,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:27,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62243 states. [2021-06-05 14:59:28,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62243 to 59590. [2021-06-05 14:59:28,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.1996173790464684) internal successors, (131073), 59589 states have internal predecessors, (131073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:28,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 131073 transitions. [2021-06-05 14:59:28,464 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 131073 transitions. Word has length 66 [2021-06-05 14:59:28,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:28,468 INFO L482 AbstractCegarLoop]: Abstraction has 59590 states and 131073 transitions. [2021-06-05 14:59:28,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 131073 transitions. [2021-06-05 14:59:28,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:28,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:28,513 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:28,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:28,714 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:28,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:28,714 INFO L82 PathProgramCache]: Analyzing trace with hash -909128409, now seen corresponding path program 84 times [2021-06-05 14:59:28,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:28,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420645468] [2021-06-05 14:59:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:28,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:28,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420645468] [2021-06-05 14:59:28,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420645468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:28,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735671003] [2021-06-05 14:59:28,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:28,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 14:59:28,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:28,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:28,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:28,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735671003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:28,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:28,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:59:28,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681838172] [2021-06-05 14:59:28,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:59:28,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:28,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:59:28,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:59:28,880 INFO L87 Difference]: Start difference. First operand 59590 states and 131073 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:29,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:29,155 INFO L93 Difference]: Finished difference Result 62467 states and 135889 transitions. [2021-06-05 14:59:29,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:59:29,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:29,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:29,224 INFO L225 Difference]: With dead ends: 62467 [2021-06-05 14:59:29,224 INFO L226 Difference]: Without dead ends: 62335 [2021-06-05 14:59:29,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:59:29,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62335 states. [2021-06-05 14:59:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62335 to 59590. [2021-06-05 14:59:30,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.1969323197234387) internal successors, (130913), 59589 states have internal predecessors, (130913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 130913 transitions. [2021-06-05 14:59:30,184 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 130913 transitions. Word has length 66 [2021-06-05 14:59:30,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:30,184 INFO L482 AbstractCegarLoop]: Abstraction has 59590 states and 130913 transitions. [2021-06-05 14:59:30,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 130913 transitions. [2021-06-05 14:59:30,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:30,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:30,218 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:30,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 14:59:30,418 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:30,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:30,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1791126029, now seen corresponding path program 85 times [2021-06-05 14:59:30,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:30,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326788592] [2021-06-05 14:59:30,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:30,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:30,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326788592] [2021-06-05 14:59:30,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326788592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:30,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753866868] [2021-06-05 14:59:30,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:30,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:30,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:30,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753866868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:30,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:30,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 14:59:30,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978051299] [2021-06-05 14:59:30,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:59:30,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:30,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:59:30,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:59:30,595 INFO L87 Difference]: Start difference. First operand 59590 states and 130913 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:30,890 INFO L93 Difference]: Finished difference Result 62011 states and 135009 transitions. [2021-06-05 14:59:30,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:59:30,891 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:30,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:30,966 INFO L225 Difference]: With dead ends: 62011 [2021-06-05 14:59:30,966 INFO L226 Difference]: Without dead ends: 61819 [2021-06-05 14:59:30,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:59:31,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61819 states. [2021-06-05 14:59:31,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61819 to 59670. [2021-06-05 14:59:31,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59670 states, 59669 states have (on average 2.193383498969314) internal successors, (130877), 59669 states have internal predecessors, (130877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59670 states to 59670 states and 130877 transitions. [2021-06-05 14:59:31,949 INFO L78 Accepts]: Start accepts. Automaton has 59670 states and 130877 transitions. Word has length 66 [2021-06-05 14:59:31,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:31,949 INFO L482 AbstractCegarLoop]: Abstraction has 59670 states and 130877 transitions. [2021-06-05 14:59:31,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:31,949 INFO L276 IsEmpty]: Start isEmpty. Operand 59670 states and 130877 transitions. [2021-06-05 14:59:31,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:31,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:31,987 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:32,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:32,188 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:32,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:32,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1714547269, now seen corresponding path program 86 times [2021-06-05 14:59:32,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:32,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141447231] [2021-06-05 14:59:32,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 14:59:32,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:32,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141447231] [2021-06-05 14:59:32,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141447231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:32,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292463629] [2021-06-05 14:59:32,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:32,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:32,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:32,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:32,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 14:59:32,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292463629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:32,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:32,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:59:32,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667212152] [2021-06-05 14:59:32,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:59:32,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:32,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:59:32,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:59:32,363 INFO L87 Difference]: Start difference. First operand 59670 states and 130877 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:32,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:32,640 INFO L93 Difference]: Finished difference Result 65831 states and 143283 transitions. [2021-06-05 14:59:32,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:59:32,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 14:59:32,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:32,719 INFO L225 Difference]: With dead ends: 65831 [2021-06-05 14:59:32,719 INFO L226 Difference]: Without dead ends: 65774 [2021-06-05 14:59:32,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:59:32,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65774 states. [2021-06-05 14:59:33,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65774 to 55516. [2021-06-05 14:59:33,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55516 states, 55515 states have (on average 2.1908132937044043) internal successors, (121623), 55515 states have internal predecessors, (121623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:33,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55516 states to 55516 states and 121623 transitions. [2021-06-05 14:59:33,789 INFO L78 Accepts]: Start accepts. Automaton has 55516 states and 121623 transitions. Word has length 66 [2021-06-05 14:59:33,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:33,789 INFO L482 AbstractCegarLoop]: Abstraction has 55516 states and 121623 transitions. [2021-06-05 14:59:33,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:33,789 INFO L276 IsEmpty]: Start isEmpty. Operand 55516 states and 121623 transitions. [2021-06-05 14:59:33,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:33,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:33,827 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:34,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 14:59:34,027 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:34,028 INFO L82 PathProgramCache]: Analyzing trace with hash 129559749, now seen corresponding path program 87 times [2021-06-05 14:59:34,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:34,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144841466] [2021-06-05 14:59:34,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 14:59:34,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:34,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144841466] [2021-06-05 14:59:34,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144841466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:34,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974424350] [2021-06-05 14:59:34,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:34,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 14:59:34,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:34,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:34,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 14:59:34,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974424350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:34,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:34,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:59:34,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042108466] [2021-06-05 14:59:34,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:59:34,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:34,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:59:34,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:59:34,200 INFO L87 Difference]: Start difference. First operand 55516 states and 121623 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:34,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:34,447 INFO L93 Difference]: Finished difference Result 61581 states and 133847 transitions. [2021-06-05 14:59:34,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:59:34,448 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 14:59:34,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:34,524 INFO L225 Difference]: With dead ends: 61581 [2021-06-05 14:59:34,524 INFO L226 Difference]: Without dead ends: 61554 [2021-06-05 14:59:34,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61554 states. [2021-06-05 14:59:35,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61554 to 54860. [2021-06-05 14:59:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54860 states, 54859 states have (on average 2.1912721704733955) internal successors, (120211), 54859 states have internal predecessors, (120211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:35,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54860 states to 54860 states and 120211 transitions. [2021-06-05 14:59:35,579 INFO L78 Accepts]: Start accepts. Automaton has 54860 states and 120211 transitions. Word has length 66 [2021-06-05 14:59:35,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:35,579 INFO L482 AbstractCegarLoop]: Abstraction has 54860 states and 120211 transitions. [2021-06-05 14:59:35,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:35,580 INFO L276 IsEmpty]: Start isEmpty. Operand 54860 states and 120211 transitions. [2021-06-05 14:59:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:35,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:35,620 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:35,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:35,820 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:35,821 INFO L82 PathProgramCache]: Analyzing trace with hash -518473861, now seen corresponding path program 88 times [2021-06-05 14:59:35,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:35,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109225857] [2021-06-05 14:59:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:59:35,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:35,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109225857] [2021-06-05 14:59:35,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109225857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:35,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453356615] [2021-06-05 14:59:35,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:35,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:35,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:35,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:35,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:59:36,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453356615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:36,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:36,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:59:36,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824981336] [2021-06-05 14:59:36,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:59:36,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:36,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:59:36,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:59:36,007 INFO L87 Difference]: Start difference. First operand 54860 states and 120211 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:36,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:36,604 INFO L93 Difference]: Finished difference Result 62633 states and 136579 transitions. [2021-06-05 14:59:36,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:59:36,605 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 14:59:36,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:36,676 INFO L225 Difference]: With dead ends: 62633 [2021-06-05 14:59:36,676 INFO L226 Difference]: Without dead ends: 62630 [2021-06-05 14:59:36,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:36,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62630 states. [2021-06-05 14:59:37,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62630 to 56940. [2021-06-05 14:59:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56940 states, 56939 states have (on average 2.195525035564376) internal successors, (125011), 56939 states have internal predecessors, (125011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56940 states to 56940 states and 125011 transitions. [2021-06-05 14:59:37,387 INFO L78 Accepts]: Start accepts. Automaton has 56940 states and 125011 transitions. Word has length 66 [2021-06-05 14:59:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:37,388 INFO L482 AbstractCegarLoop]: Abstraction has 56940 states and 125011 transitions. [2021-06-05 14:59:37,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 56940 states and 125011 transitions. [2021-06-05 14:59:37,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:37,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:37,421 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:37,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 14:59:37,622 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:37,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:37,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1653142277, now seen corresponding path program 89 times [2021-06-05 14:59:37,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:37,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214526746] [2021-06-05 14:59:37,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:37,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:37,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214526746] [2021-06-05 14:59:37,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214526746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:37,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149449818] [2021-06-05 14:59:37,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:37,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 14:59:37,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:37,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 14:59:37,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:37,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149449818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:37,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:37,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:59:37,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887042115] [2021-06-05 14:59:37,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:59:37,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:37,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:59:37,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:59:37,799 INFO L87 Difference]: Start difference. First operand 56940 states and 125011 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:38,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:38,315 INFO L93 Difference]: Finished difference Result 66890 states and 145747 transitions. [2021-06-05 14:59:38,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:59:38,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:38,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:38,386 INFO L225 Difference]: With dead ends: 66890 [2021-06-05 14:59:38,386 INFO L226 Difference]: Without dead ends: 66890 [2021-06-05 14:59:38,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:59:38,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66890 states. [2021-06-05 14:59:39,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66890 to 62652. [2021-06-05 14:59:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62652 states, 62651 states have (on average 2.2049288917974175) internal successors, (138141), 62651 states have internal predecessors, (138141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62652 states to 62652 states and 138141 transitions. [2021-06-05 14:59:39,472 INFO L78 Accepts]: Start accepts. Automaton has 62652 states and 138141 transitions. Word has length 66 [2021-06-05 14:59:39,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:39,472 INFO L482 AbstractCegarLoop]: Abstraction has 62652 states and 138141 transitions. [2021-06-05 14:59:39,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 62652 states and 138141 transitions. [2021-06-05 14:59:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:39,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:39,517 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:39,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 14:59:39,719 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:39,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:39,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1471769019, now seen corresponding path program 90 times [2021-06-05 14:59:39,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:39,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130558732] [2021-06-05 14:59:39,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:39,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:39,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130558732] [2021-06-05 14:59:39,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130558732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:39,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176283153] [2021-06-05 14:59:39,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:39,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 14:59:39,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:39,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:59:39,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 27 proven. 74 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-05 14:59:39,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176283153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:39,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:39,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 14:59:39,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019105686] [2021-06-05 14:59:39,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:59:39,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:39,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:59:39,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:59:39,915 INFO L87 Difference]: Start difference. First operand 62652 states and 138141 transitions. Second operand has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:41,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:41,142 INFO L93 Difference]: Finished difference Result 90468 states and 195554 transitions. [2021-06-05 14:59:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 14:59:41,142 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:41,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:41,245 INFO L225 Difference]: With dead ends: 90468 [2021-06-05 14:59:41,245 INFO L226 Difference]: Without dead ends: 90440 [2021-06-05 14:59:41,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 589.8ms TimeCoverageRelationStatistics Valid=788, Invalid=4182, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 14:59:41,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90440 states. [2021-06-05 14:59:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90440 to 64804. [2021-06-05 14:59:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64804 states, 64803 states have (on average 2.2016727620634846) internal successors, (142675), 64803 states have internal predecessors, (142675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 142675 transitions. [2021-06-05 14:59:42,421 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 142675 transitions. Word has length 66 [2021-06-05 14:59:42,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:42,421 INFO L482 AbstractCegarLoop]: Abstraction has 64804 states and 142675 transitions. [2021-06-05 14:59:42,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:42,422 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 142675 transitions. [2021-06-05 14:59:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:42,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:42,456 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:42,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 14:59:42,657 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:42,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:42,657 INFO L82 PathProgramCache]: Analyzing trace with hash 47459948, now seen corresponding path program 91 times [2021-06-05 14:59:42,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:42,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372629570] [2021-06-05 14:59:42,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 51 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:42,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:42,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372629570] [2021-06-05 14:59:42,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372629570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:42,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233622458] [2021-06-05 14:59:42,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:42,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:59:42,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 44 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 14:59:42,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233622458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:42,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:42,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 14:59:42,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696539072] [2021-06-05 14:59:42,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:59:42,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:42,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:59:42,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:59:42,836 INFO L87 Difference]: Start difference. First operand 64804 states and 142675 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:43,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:43,296 INFO L93 Difference]: Finished difference Result 71842 states and 157251 transitions. [2021-06-05 14:59:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:59:43,296 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 14:59:43,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:43,373 INFO L225 Difference]: With dead ends: 71842 [2021-06-05 14:59:43,373 INFO L226 Difference]: Without dead ends: 71794 [2021-06-05 14:59:43,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:43,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71794 states. [2021-06-05 14:59:44,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71794 to 64804. [2021-06-05 14:59:44,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64804 states, 64803 states have (on average 2.2010555066895052) internal successors, (142635), 64803 states have internal predecessors, (142635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 142635 transitions. [2021-06-05 14:59:44,515 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 142635 transitions. Word has length 66 [2021-06-05 14:59:44,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:44,515 INFO L482 AbstractCegarLoop]: Abstraction has 64804 states and 142635 transitions. [2021-06-05 14:59:44,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:44,516 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 142635 transitions. [2021-06-05 14:59:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:44,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:44,557 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:44,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:44,757 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:44,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:44,758 INFO L82 PathProgramCache]: Analyzing trace with hash -442650298, now seen corresponding path program 92 times [2021-06-05 14:59:44,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:44,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128593120] [2021-06-05 14:59:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 52 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:44,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:44,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128593120] [2021-06-05 14:59:44,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128593120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:44,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644864642] [2021-06-05 14:59:44,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:44,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:44,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:44,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:59:44,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 64 proven. 52 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 14:59:44,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644864642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:44,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:44,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-06-05 14:59:44,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742981156] [2021-06-05 14:59:44,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:59:44,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:44,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:59:44,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:59:44,931 INFO L87 Difference]: Start difference. First operand 64804 states and 142635 transitions. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:45,264 INFO L93 Difference]: Finished difference Result 72032 states and 157512 transitions. [2021-06-05 14:59:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:59:45,265 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 14:59:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:45,348 INFO L225 Difference]: With dead ends: 72032 [2021-06-05 14:59:45,348 INFO L226 Difference]: Without dead ends: 71944 [2021-06-05 14:59:45,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:59:45,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71944 states. [2021-06-05 14:59:46,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71944 to 66864. [2021-06-05 14:59:46,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66864 states, 66863 states have (on average 2.2050910069844307) internal successors, (147439), 66863 states have internal predecessors, (147439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:46,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66864 states to 66864 states and 147439 transitions. [2021-06-05 14:59:46,571 INFO L78 Accepts]: Start accepts. Automaton has 66864 states and 147439 transitions. Word has length 66 [2021-06-05 14:59:46,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:46,572 INFO L482 AbstractCegarLoop]: Abstraction has 66864 states and 147439 transitions. [2021-06-05 14:59:46,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:46,572 INFO L276 IsEmpty]: Start isEmpty. Operand 66864 states and 147439 transitions. [2021-06-05 14:59:46,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 14:59:46,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:46,609 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:46,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 14:59:46,811 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:46,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:46,811 INFO L82 PathProgramCache]: Analyzing trace with hash 361914028, now seen corresponding path program 93 times [2021-06-05 14:59:46,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:46,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115979651] [2021-06-05 14:59:46,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 62 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:46,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:46,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115979651] [2021-06-05 14:59:46,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115979651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:46,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153617159] [2021-06-05 14:59:46,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:46,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:59:46,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:46,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:59:46,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:59:47,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153617159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:47,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:47,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-06-05 14:59:47,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982301419] [2021-06-05 14:59:47,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:59:47,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:47,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:59:47,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:59:47,063 INFO L87 Difference]: Start difference. First operand 66864 states and 147439 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:47,688 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 14:59:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:48,964 INFO L93 Difference]: Finished difference Result 139029 states and 299640 transitions. [2021-06-05 14:59:48,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 14:59:48,964 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 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 66 [2021-06-05 14:59:48,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:49,142 INFO L225 Difference]: With dead ends: 139029 [2021-06-05 14:59:49,142 INFO L226 Difference]: Without dead ends: 138261 [2021-06-05 14:59:49,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3539 ImplicationChecksByTransitivity, 1160.7ms TimeCoverageRelationStatistics Valid=961, Invalid=9139, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 14:59:49,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138261 states. [2021-06-05 14:59:50,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138261 to 102720. [2021-06-05 14:59:51,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102720 states, 102719 states have (on average 2.1767637924824035) internal successors, (223595), 102719 states have internal predecessors, (223595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102720 states to 102720 states and 223595 transitions. [2021-06-05 14:59:51,202 INFO L78 Accepts]: Start accepts. Automaton has 102720 states and 223595 transitions. Word has length 66 [2021-06-05 14:59:51,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:51,202 INFO L482 AbstractCegarLoop]: Abstraction has 102720 states and 223595 transitions. [2021-06-05 14:59:51,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:51,202 INFO L276 IsEmpty]: Start isEmpty. Operand 102720 states and 223595 transitions. [2021-06-05 14:59:51,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 14:59:51,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:51,274 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:51,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:51,474 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:51,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:51,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2025977669, now seen corresponding path program 94 times [2021-06-05 14:59:51,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:51,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586639651] [2021-06-05 14:59:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:51,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:51,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586639651] [2021-06-05 14:59:51,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586639651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:51,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738148377] [2021-06-05 14:59:51,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:51,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:51,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:51,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:59:51,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:51,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738148377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:51,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:51,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 14:59:51,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170720935] [2021-06-05 14:59:51,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:59:51,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:51,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:59:51,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:59:51,700 INFO L87 Difference]: Start difference. First operand 102720 states and 223595 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:52,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:52,280 INFO L93 Difference]: Finished difference Result 133769 states and 293050 transitions. [2021-06-05 14:59:52,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:59:52,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 14:59:52,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:52,451 INFO L225 Difference]: With dead ends: 133769 [2021-06-05 14:59:52,451 INFO L226 Difference]: Without dead ends: 133551 [2021-06-05 14:59:52,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:59:53,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133551 states. [2021-06-05 14:59:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133551 to 130358. [2021-06-05 14:59:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130358 states, 130357 states have (on average 2.1991991224099974) internal successors, (286681), 130357 states have internal predecessors, (286681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130358 states to 130358 states and 286681 transitions. [2021-06-05 14:59:55,379 INFO L78 Accepts]: Start accepts. Automaton has 130358 states and 286681 transitions. Word has length 76 [2021-06-05 14:59:55,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:55,379 INFO L482 AbstractCegarLoop]: Abstraction has 130358 states and 286681 transitions. [2021-06-05 14:59:55,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand 130358 states and 286681 transitions. [2021-06-05 14:59:55,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 14:59:55,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:55,465 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:55,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 14:59:55,688 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:55,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:55,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1940313489, now seen corresponding path program 95 times [2021-06-05 14:59:55,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:55,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857386231] [2021-06-05 14:59:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:55,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:55,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857386231] [2021-06-05 14:59:55,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857386231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:55,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398054649] [2021-06-05 14:59:55,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:55,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 14:59:55,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:55,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:59:55,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:55,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398054649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:55,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:55,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:59:55,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294012385] [2021-06-05 14:59:55,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:59:55,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:55,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:59:55,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:59:55,914 INFO L87 Difference]: Start difference. First operand 130358 states and 286681 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:56,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:56,357 INFO L93 Difference]: Finished difference Result 133389 states and 291682 transitions. [2021-06-05 14:59:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:59:56,358 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 14:59:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:56,549 INFO L225 Difference]: With dead ends: 133389 [2021-06-05 14:59:56,549 INFO L226 Difference]: Without dead ends: 133389 [2021-06-05 14:59:56,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:56,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133389 states. [2021-06-05 14:59:58,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133389 to 125674. [2021-06-05 14:59:58,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125674 states, 125673 states have (on average 2.193892085014283) internal successors, (275713), 125673 states have internal predecessors, (275713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:58,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125674 states to 125674 states and 275713 transitions. [2021-06-05 14:59:58,854 INFO L78 Accepts]: Start accepts. Automaton has 125674 states and 275713 transitions. Word has length 76 [2021-06-05 14:59:58,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:58,854 INFO L482 AbstractCegarLoop]: Abstraction has 125674 states and 275713 transitions. [2021-06-05 14:59:58,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:58,854 INFO L276 IsEmpty]: Start isEmpty. Operand 125674 states and 275713 transitions. [2021-06-05 14:59:58,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 14:59:58,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:58,932 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:59,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:59,132 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:59,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1246228997, now seen corresponding path program 96 times [2021-06-05 14:59:59,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:59,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967284251] [2021-06-05 14:59:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:59,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:59,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967284251] [2021-06-05 14:59:59,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967284251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:59,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700115727] [2021-06-05 14:59:59,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:59,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:59:59,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:59,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:59:59,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:59,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700115727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:59,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:59,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:59:59,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562894029] [2021-06-05 14:59:59,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:59:59,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:59,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:59:59,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:59:59,304 INFO L87 Difference]: Start difference. First operand 125674 states and 275713 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:00,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:00,226 INFO L93 Difference]: Finished difference Result 131872 states and 288047 transitions. [2021-06-05 15:00:00,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:00,227 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:00:00,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:00,390 INFO L225 Difference]: With dead ends: 131872 [2021-06-05 15:00:00,390 INFO L226 Difference]: Without dead ends: 131866 [2021-06-05 15:00:00,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:00,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131866 states. [2021-06-05 15:00:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131866 to 128726. [2021-06-05 15:00:02,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128726 states, 128725 states have (on average 2.197374247426685) internal successors, (282857), 128725 states have internal predecessors, (282857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:02,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128726 states to 128726 states and 282857 transitions. [2021-06-05 15:00:02,937 INFO L78 Accepts]: Start accepts. Automaton has 128726 states and 282857 transitions. Word has length 76 [2021-06-05 15:00:02,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:02,937 INFO L482 AbstractCegarLoop]: Abstraction has 128726 states and 282857 transitions. [2021-06-05 15:00:02,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:02,937 INFO L276 IsEmpty]: Start isEmpty. Operand 128726 states and 282857 transitions. [2021-06-05 15:00:03,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:00:03,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:03,033 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:03,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:03,249 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:03,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:03,249 INFO L82 PathProgramCache]: Analyzing trace with hash -941503377, now seen corresponding path program 97 times [2021-06-05 15:00:03,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:03,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122152208] [2021-06-05 15:00:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 83 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:03,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:03,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122152208] [2021-06-05 15:00:03,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122152208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:03,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744889485] [2021-06-05 15:00:03,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:03,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:00:03,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 83 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:03,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744889485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:03,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:03,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 15:00:03,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663407547] [2021-06-05 15:00:03,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:00:03,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:03,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:00:03,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:00:03,487 INFO L87 Difference]: Start difference. First operand 128726 states and 282857 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:04,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:04,037 INFO L93 Difference]: Finished difference Result 134932 states and 294145 transitions. [2021-06-05 15:00:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:04,037 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:00:04,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:04,216 INFO L225 Difference]: With dead ends: 134932 [2021-06-05 15:00:04,216 INFO L226 Difference]: Without dead ends: 134930 [2021-06-05 15:00:04,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:04,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134930 states. [2021-06-05 15:00:06,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134930 to 128702. [2021-06-05 15:00:06,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128702 states, 128701 states have (on average 2.1954841065725983) internal successors, (282561), 128701 states have internal predecessors, (282561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128702 states to 128702 states and 282561 transitions. [2021-06-05 15:00:06,974 INFO L78 Accepts]: Start accepts. Automaton has 128702 states and 282561 transitions. Word has length 76 [2021-06-05 15:00:06,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:06,974 INFO L482 AbstractCegarLoop]: Abstraction has 128702 states and 282561 transitions. [2021-06-05 15:00:06,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:06,974 INFO L276 IsEmpty]: Start isEmpty. Operand 128702 states and 282561 transitions. [2021-06-05 15:00:07,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:00:07,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:07,068 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:07,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 15:00:07,285 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:07,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:07,285 INFO L82 PathProgramCache]: Analyzing trace with hash -551299451, now seen corresponding path program 98 times [2021-06-05 15:00:07,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:07,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005733603] [2021-06-05 15:00:07,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:07,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:07,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005733603] [2021-06-05 15:00:07,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005733603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:07,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537522556] [2021-06-05 15:00:07,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:07,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:07,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:07,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:00:07,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:07,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537522556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:07,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:07,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 15:00:07,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745522099] [2021-06-05 15:00:07,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:00:07,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:07,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:00:07,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:00:07,489 INFO L87 Difference]: Start difference. First operand 128702 states and 282561 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:07,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:07,939 INFO L93 Difference]: Finished difference Result 134144 states and 292817 transitions. [2021-06-05 15:00:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:07,940 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:00:07,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:08,669 INFO L225 Difference]: With dead ends: 134144 [2021-06-05 15:00:08,669 INFO L226 Difference]: Without dead ends: 134142 [2021-06-05 15:00:08,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:08,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134142 states. [2021-06-05 15:00:10,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134142 to 128026. [2021-06-05 15:00:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128026 states, 128025 states have (on average 2.1946260495996874) internal successors, (280967), 128025 states have internal predecessors, (280967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:10,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128026 states to 128026 states and 280967 transitions. [2021-06-05 15:00:10,906 INFO L78 Accepts]: Start accepts. Automaton has 128026 states and 280967 transitions. Word has length 76 [2021-06-05 15:00:10,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:10,907 INFO L482 AbstractCegarLoop]: Abstraction has 128026 states and 280967 transitions. [2021-06-05 15:00:10,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:10,907 INFO L276 IsEmpty]: Start isEmpty. Operand 128026 states and 280967 transitions. [2021-06-05 15:00:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:00:11,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:11,468 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:11,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:11,697 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:11,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1583115929, now seen corresponding path program 99 times [2021-06-05 15:00:11,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:11,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206669044] [2021-06-05 15:00:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:00:11,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:11,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206669044] [2021-06-05 15:00:11,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206669044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:11,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030531695] [2021-06-05 15:00:11,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:11,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:00:11,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:11,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:00:11,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:00:11,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030531695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:11,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:11,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 15:00:11,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110299698] [2021-06-05 15:00:11,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:00:11,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:11,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:00:11,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:00:11,906 INFO L87 Difference]: Start difference. First operand 128026 states and 280967 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:12,325 INFO L93 Difference]: Finished difference Result 134843 states and 294803 transitions. [2021-06-05 15:00:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:00:12,325 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 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 76 [2021-06-05 15:00:12,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:12,511 INFO L225 Difference]: With dead ends: 134843 [2021-06-05 15:00:12,511 INFO L226 Difference]: Without dead ends: 134807 [2021-06-05 15:00:12,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:12,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134807 states. [2021-06-05 15:00:14,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134807 to 131862. [2021-06-05 15:00:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131862 states, 131861 states have (on average 2.1977916138964515) internal successors, (289803), 131861 states have internal predecessors, (289803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131862 states to 131862 states and 289803 transitions. [2021-06-05 15:00:14,948 INFO L78 Accepts]: Start accepts. Automaton has 131862 states and 289803 transitions. Word has length 76 [2021-06-05 15:00:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:14,949 INFO L482 AbstractCegarLoop]: Abstraction has 131862 states and 289803 transitions. [2021-06-05 15:00:14,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 131862 states and 289803 transitions. [2021-06-05 15:00:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:00:15,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:15,026 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:15,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:15,241 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:15,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:15,241 INFO L82 PathProgramCache]: Analyzing trace with hash 128207611, now seen corresponding path program 100 times [2021-06-05 15:00:15,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:15,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301405949] [2021-06-05 15:00:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:15,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:15,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301405949] [2021-06-05 15:00:15,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301405949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:15,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276722876] [2021-06-05 15:00:15,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:15,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:15,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:15,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:00:15,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:15,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276722876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:15,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:15,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 15:00:15,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459542719] [2021-06-05 15:00:15,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:00:15,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:15,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:00:15,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:00:15,446 INFO L87 Difference]: Start difference. First operand 131862 states and 289803 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:15,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:15,916 INFO L93 Difference]: Finished difference Result 138462 states and 302796 transitions. [2021-06-05 15:00:15,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:15,917 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:00:15,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:16,095 INFO L225 Difference]: With dead ends: 138462 [2021-06-05 15:00:16,095 INFO L226 Difference]: Without dead ends: 138426 [2021-06-05 15:00:16,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138426 states. [2021-06-05 15:00:18,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138426 to 131338. [2021-06-05 15:00:18,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131338 states, 131337 states have (on average 2.1961747260863276) internal successors, (288439), 131337 states have internal predecessors, (288439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131338 states to 131338 states and 288439 transitions. [2021-06-05 15:00:18,599 INFO L78 Accepts]: Start accepts. Automaton has 131338 states and 288439 transitions. Word has length 76 [2021-06-05 15:00:18,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:18,599 INFO L482 AbstractCegarLoop]: Abstraction has 131338 states and 288439 transitions. [2021-06-05 15:00:18,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:18,599 INFO L276 IsEmpty]: Start isEmpty. Operand 131338 states and 288439 transitions. [2021-06-05 15:00:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:00:18,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:18,695 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:18,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 15:00:18,917 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:18,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:18,917 INFO L82 PathProgramCache]: Analyzing trace with hash 432933231, now seen corresponding path program 101 times [2021-06-05 15:00:18,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:18,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872645313] [2021-06-05 15:00:18,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:19,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:19,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872645313] [2021-06-05 15:00:19,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872645313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:19,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698937286] [2021-06-05 15:00:19,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:19,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:00:19,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:19,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:00:19,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:19,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698937286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:19,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:19,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 15:00:19,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250773451] [2021-06-05 15:00:19,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:00:19,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:19,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:00:19,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:00:19,196 INFO L87 Difference]: Start difference. First operand 131338 states and 288439 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:20,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:20,095 INFO L93 Difference]: Finished difference Result 140394 states and 305750 transitions. [2021-06-05 15:00:20,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:20,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:00:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:20,263 INFO L225 Difference]: With dead ends: 140394 [2021-06-05 15:00:20,263 INFO L226 Difference]: Without dead ends: 140392 [2021-06-05 15:00:20,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:20,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140392 states. [2021-06-05 15:00:22,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140392 to 131550. [2021-06-05 15:00:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131550 states, 131549 states have (on average 2.1950679974762255) internal successors, (288759), 131549 states have internal predecessors, (288759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131550 states to 131550 states and 288759 transitions. [2021-06-05 15:00:22,855 INFO L78 Accepts]: Start accepts. Automaton has 131550 states and 288759 transitions. Word has length 76 [2021-06-05 15:00:22,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:22,855 INFO L482 AbstractCegarLoop]: Abstraction has 131550 states and 288759 transitions. [2021-06-05 15:00:22,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:22,855 INFO L276 IsEmpty]: Start isEmpty. Operand 131550 states and 288759 transitions. [2021-06-05 15:00:22,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:00:22,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:22,943 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:23,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 15:00:23,144 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:23,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:23,144 INFO L82 PathProgramCache]: Analyzing trace with hash 823137157, now seen corresponding path program 102 times [2021-06-05 15:00:23,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:23,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202629054] [2021-06-05 15:00:23,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:23,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:23,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202629054] [2021-06-05 15:00:23,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202629054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:23,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92193723] [2021-06-05 15:00:23,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:23,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:00:23,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:23,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:00:23,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:23,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92193723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:23,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:23,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 15:00:23,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428802881] [2021-06-05 15:00:23,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:00:23,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:23,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:00:23,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:00:23,377 INFO L87 Difference]: Start difference. First operand 131550 states and 288759 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:23,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:23,872 INFO L93 Difference]: Finished difference Result 148818 states and 323300 transitions. [2021-06-05 15:00:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:23,878 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:00:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:24,081 INFO L225 Difference]: With dead ends: 148818 [2021-06-05 15:00:24,082 INFO L226 Difference]: Without dead ends: 148800 [2021-06-05 15:00:24,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:00:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148800 states. [2021-06-05 15:00:26,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148800 to 131506. [2021-06-05 15:00:26,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131506 states, 131505 states have (on average 2.19297365119197) internal successors, (288387), 131505 states have internal predecessors, (288387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131506 states to 131506 states and 288387 transitions. [2021-06-05 15:00:26,704 INFO L78 Accepts]: Start accepts. Automaton has 131506 states and 288387 transitions. Word has length 76 [2021-06-05 15:00:26,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:26,704 INFO L482 AbstractCegarLoop]: Abstraction has 131506 states and 288387 transitions. [2021-06-05 15:00:26,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:26,704 INFO L276 IsEmpty]: Start isEmpty. Operand 131506 states and 288387 transitions. [2021-06-05 15:00:26,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:00:26,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:26,817 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:27,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 15:00:27,040 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:27,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:27,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2018965209, now seen corresponding path program 103 times [2021-06-05 15:00:27,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:27,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758897788] [2021-06-05 15:00:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:27,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:27,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758897788] [2021-06-05 15:00:27,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758897788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:27,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822863511] [2021-06-05 15:00:27,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:27,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:00:27,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:27,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822863511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:27,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:27,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:00:27,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197354935] [2021-06-05 15:00:27,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:00:27,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:27,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:00:27,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:00:27,241 INFO L87 Difference]: Start difference. First operand 131506 states and 288387 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:28,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:28,246 INFO L93 Difference]: Finished difference Result 138086 states and 301358 transitions. [2021-06-05 15:00:28,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:28,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:00:28,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:28,452 INFO L225 Difference]: With dead ends: 138086 [2021-06-05 15:00:28,452 INFO L226 Difference]: Without dead ends: 138068 [2021-06-05 15:00:28,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:28,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138068 states. [2021-06-05 15:00:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138068 to 129102. [2021-06-05 15:00:30,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129102 states, 129101 states have (on average 2.1923222902998427) internal successors, (283031), 129101 states have internal predecessors, (283031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129102 states to 129102 states and 283031 transitions. [2021-06-05 15:00:31,169 INFO L78 Accepts]: Start accepts. Automaton has 129102 states and 283031 transitions. Word has length 76 [2021-06-05 15:00:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:31,169 INFO L482 AbstractCegarLoop]: Abstraction has 129102 states and 283031 transitions. [2021-06-05 15:00:31,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:31,169 INFO L276 IsEmpty]: Start isEmpty. Operand 129102 states and 283031 transitions. [2021-06-05 15:00:31,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:00:31,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:31,235 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:31,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:31,436 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:31,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:31,436 INFO L82 PathProgramCache]: Analyzing trace with hash 974502341, now seen corresponding path program 104 times [2021-06-05 15:00:31,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:31,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504212986] [2021-06-05 15:00:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:00:31,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:31,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504212986] [2021-06-05 15:00:31,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504212986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:31,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454419951] [2021-06-05 15:00:31,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:31,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:31,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:31,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:00:31,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:00:31,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454419951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:31,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:31,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 15:00:31,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964961428] [2021-06-05 15:00:31,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:00:31,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:31,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:00:31,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:00:31,623 INFO L87 Difference]: Start difference. First operand 129102 states and 283031 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:32,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:32,054 INFO L93 Difference]: Finished difference Result 135547 states and 296050 transitions. [2021-06-05 15:00:32,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:00:32,054 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 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 76 [2021-06-05 15:00:32,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:32,227 INFO L225 Difference]: With dead ends: 135547 [2021-06-05 15:00:32,227 INFO L226 Difference]: Without dead ends: 135511 [2021-06-05 15:00:32,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:32,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135511 states. [2021-06-05 15:00:34,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135511 to 132734. [2021-06-05 15:00:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132734 states, 132733 states have (on average 2.194322436771564) internal successors, (291259), 132733 states have internal predecessors, (291259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:34,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132734 states to 132734 states and 291259 transitions. [2021-06-05 15:00:34,581 INFO L78 Accepts]: Start accepts. Automaton has 132734 states and 291259 transitions. Word has length 76 [2021-06-05 15:00:34,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:34,582 INFO L482 AbstractCegarLoop]: Abstraction has 132734 states and 291259 transitions. [2021-06-05 15:00:34,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:34,582 INFO L276 IsEmpty]: Start isEmpty. Operand 132734 states and 291259 transitions. [2021-06-05 15:00:34,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:00:34,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:34,665 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:34,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 15:00:34,866 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:34,866 INFO L82 PathProgramCache]: Analyzing trace with hash -14993925, now seen corresponding path program 105 times [2021-06-05 15:00:34,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:34,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897657407] [2021-06-05 15:00:34,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:34,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:34,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897657407] [2021-06-05 15:00:34,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897657407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:34,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037128161] [2021-06-05 15:00:34,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:34,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 15:00:34,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:34,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:00:34,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:35,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037128161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:35,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:35,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 15:00:35,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949137540] [2021-06-05 15:00:35,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:00:35,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:35,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:00:35,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:00:35,079 INFO L87 Difference]: Start difference. First operand 132734 states and 291259 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:36,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:36,106 INFO L93 Difference]: Finished difference Result 139258 states and 304121 transitions. [2021-06-05 15:00:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:36,121 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:00:36,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:36,373 INFO L225 Difference]: With dead ends: 139258 [2021-06-05 15:00:36,373 INFO L226 Difference]: Without dead ends: 139216 [2021-06-05 15:00:36,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139216 states. [2021-06-05 15:00:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139216 to 132450. [2021-06-05 15:00:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132450 states, 132449 states have (on average 2.193168691345348) internal successors, (290483), 132449 states have internal predecessors, (290483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132450 states to 132450 states and 290483 transitions. [2021-06-05 15:00:38,971 INFO L78 Accepts]: Start accepts. Automaton has 132450 states and 290483 transitions. Word has length 76 [2021-06-05 15:00:38,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:38,971 INFO L482 AbstractCegarLoop]: Abstraction has 132450 states and 290483 transitions. [2021-06-05 15:00:38,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand 132450 states and 290483 transitions. [2021-06-05 15:00:39,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:00:39,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:39,083 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:39,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 15:00:39,283 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:39,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:39,283 INFO L82 PathProgramCache]: Analyzing trace with hash 289731695, now seen corresponding path program 106 times [2021-06-05 15:00:39,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:39,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111700436] [2021-06-05 15:00:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:39,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:39,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111700436] [2021-06-05 15:00:39,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111700436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:39,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672131440] [2021-06-05 15:00:39,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:39,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:39,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:39,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:00:39,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:39,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672131440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:39,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:39,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 15:00:39,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835845429] [2021-06-05 15:00:39,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:00:39,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:39,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:00:39,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:00:39,446 INFO L87 Difference]: Start difference. First operand 132450 states and 290483 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:39,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:39,860 INFO L93 Difference]: Finished difference Result 142694 states and 310513 transitions. [2021-06-05 15:00:39,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:39,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:00:39,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:40,047 INFO L225 Difference]: With dead ends: 142694 [2021-06-05 15:00:40,047 INFO L226 Difference]: Without dead ends: 142692 [2021-06-05 15:00:40,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:40,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142692 states. [2021-06-05 15:00:42,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142692 to 132698. [2021-06-05 15:00:42,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132698 states, 132697 states have (on average 2.1928076746271583) internal successors, (290979), 132697 states have internal predecessors, (290979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:42,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132698 states to 132698 states and 290979 transitions. [2021-06-05 15:00:42,428 INFO L78 Accepts]: Start accepts. Automaton has 132698 states and 290979 transitions. Word has length 76 [2021-06-05 15:00:42,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:42,428 INFO L482 AbstractCegarLoop]: Abstraction has 132698 states and 290979 transitions. [2021-06-05 15:00:42,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:42,428 INFO L276 IsEmpty]: Start isEmpty. Operand 132698 states and 290979 transitions. [2021-06-05 15:00:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:00:42,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:42,503 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:42,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 15:00:42,704 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:42,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:42,704 INFO L82 PathProgramCache]: Analyzing trace with hash 679935621, now seen corresponding path program 107 times [2021-06-05 15:00:42,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:42,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462273771] [2021-06-05 15:00:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:42,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:42,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462273771] [2021-06-05 15:00:42,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462273771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:42,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706308927] [2021-06-05 15:00:42,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:42,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 15:00:42,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:42,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:00:42,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:42,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706308927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:42,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:42,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 15:00:42,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174423026] [2021-06-05 15:00:42,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:00:42,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:42,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:00:42,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:00:42,875 INFO L87 Difference]: Start difference. First operand 132698 states and 290979 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:43,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:43,832 INFO L93 Difference]: Finished difference Result 159426 states and 345883 transitions. [2021-06-05 15:00:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:00:43,841 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:00:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:44,060 INFO L225 Difference]: With dead ends: 159426 [2021-06-05 15:00:44,061 INFO L226 Difference]: Without dead ends: 159408 [2021-06-05 15:00:44,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159408 states. [2021-06-05 15:00:45,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159408 to 133538. [2021-06-05 15:00:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133538 states, 133537 states have (on average 2.1909957539857867) internal successors, (292579), 133537 states have internal predecessors, (292579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133538 states to 133538 states and 292579 transitions. [2021-06-05 15:00:46,593 INFO L78 Accepts]: Start accepts. Automaton has 133538 states and 292579 transitions. Word has length 76 [2021-06-05 15:00:46,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:46,593 INFO L482 AbstractCegarLoop]: Abstraction has 133538 states and 292579 transitions. [2021-06-05 15:00:46,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:46,593 INFO L276 IsEmpty]: Start isEmpty. Operand 133538 states and 292579 transitions. [2021-06-05 15:00:46,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:00:46,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:46,698 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:46,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:46,913 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:46,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:46,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2132800551, now seen corresponding path program 108 times [2021-06-05 15:00:46,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:46,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507042303] [2021-06-05 15:00:46,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:46,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:46,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507042303] [2021-06-05 15:00:46,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507042303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:46,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193082633] [2021-06-05 15:00:46,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:47,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 15:00:47,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:47,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:00:47,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:47,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193082633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:47,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:47,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:00:47,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641744647] [2021-06-05 15:00:47,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:00:47,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:47,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:00:47,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:00:47,113 INFO L87 Difference]: Start difference. First operand 133538 states and 292579 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:47,628 INFO L93 Difference]: Finished difference Result 154174 states and 334665 transitions. [2021-06-05 15:00:47,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:00:47,629 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:00:47,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:47,831 INFO L225 Difference]: With dead ends: 154174 [2021-06-05 15:00:47,831 INFO L226 Difference]: Without dead ends: 154136 [2021-06-05 15:00:47,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:00:47,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154136 states. [2021-06-05 15:00:49,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154136 to 133478. [2021-06-05 15:00:49,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133478 states, 133477 states have (on average 2.1892535792683385) internal successors, (292215), 133477 states have internal predecessors, (292215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133478 states to 133478 states and 292215 transitions. [2021-06-05 15:00:50,198 INFO L78 Accepts]: Start accepts. Automaton has 133478 states and 292215 transitions. Word has length 76 [2021-06-05 15:00:50,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:50,198 INFO L482 AbstractCegarLoop]: Abstraction has 133478 states and 292215 transitions. [2021-06-05 15:00:50,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 133478 states and 292215 transitions. [2021-06-05 15:00:50,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:00:50,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:50,275 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:50,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:50,475 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:50,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:50,475 INFO L82 PathProgramCache]: Analyzing trace with hash 271329285, now seen corresponding path program 109 times [2021-06-05 15:00:50,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:50,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955769299] [2021-06-05 15:00:50,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:50,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:50,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955769299] [2021-06-05 15:00:50,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955769299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:50,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913021452] [2021-06-05 15:00:50,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:50,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:00:50,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:50,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913021452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:50,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:50,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 15:00:50,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862539315] [2021-06-05 15:00:50,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:00:50,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:50,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:00:50,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:00:50,695 INFO L87 Difference]: Start difference. First operand 133478 states and 292215 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:51,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:51,708 INFO L93 Difference]: Finished difference Result 139982 states and 305517 transitions. [2021-06-05 15:00:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:51,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:00:51,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:51,923 INFO L225 Difference]: With dead ends: 139982 [2021-06-05 15:00:51,923 INFO L226 Difference]: Without dead ends: 139944 [2021-06-05 15:00:51,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:00:52,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139944 states. [2021-06-05 15:00:53,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139944 to 129634. [2021-06-05 15:00:53,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129634 states, 129633 states have (on average 2.1887250931475783) internal successors, (283731), 129633 states have internal predecessors, (283731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:53,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129634 states to 129634 states and 283731 transitions. [2021-06-05 15:00:53,838 INFO L78 Accepts]: Start accepts. Automaton has 129634 states and 283731 transitions. Word has length 76 [2021-06-05 15:00:53,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:53,838 INFO L482 AbstractCegarLoop]: Abstraction has 129634 states and 283731 transitions. [2021-06-05 15:00:53,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:53,838 INFO L276 IsEmpty]: Start isEmpty. Operand 129634 states and 283731 transitions. [2021-06-05 15:00:53,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:00:53,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:53,910 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:54,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:54,110 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:54,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:54,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1903347815, now seen corresponding path program 110 times [2021-06-05 15:00:54,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:54,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997445412] [2021-06-05 15:00:54,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:00:54,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:54,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997445412] [2021-06-05 15:00:54,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997445412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:54,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648355852] [2021-06-05 15:00:54,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:54,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:54,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:54,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:00:54,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:00:54,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648355852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:54,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:54,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 15:00:54,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583308947] [2021-06-05 15:00:54,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:00:54,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:54,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:00:54,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:00:54,716 INFO L87 Difference]: Start difference. First operand 129634 states and 283731 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:55,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:55,385 INFO L93 Difference]: Finished difference Result 135321 states and 295193 transitions. [2021-06-05 15:00:55,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:00:55,385 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 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 76 [2021-06-05 15:00:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:55,579 INFO L225 Difference]: With dead ends: 135321 [2021-06-05 15:00:55,579 INFO L226 Difference]: Without dead ends: 135249 [2021-06-05 15:00:55,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:55,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135249 states. [2021-06-05 15:00:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135249 to 123270. [2021-06-05 15:00:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123270 states, 123269 states have (on average 2.185910488443972) internal successors, (269455), 123269 states have internal predecessors, (269455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123270 states to 123270 states and 269455 transitions. [2021-06-05 15:00:57,427 INFO L78 Accepts]: Start accepts. Automaton has 123270 states and 269455 transitions. Word has length 76 [2021-06-05 15:00:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:57,427 INFO L482 AbstractCegarLoop]: Abstraction has 123270 states and 269455 transitions. [2021-06-05 15:00:57,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 123270 states and 269455 transitions. [2021-06-05 15:00:57,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:00:57,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:57,503 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:57,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 15:00:57,708 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:57,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:57,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1486828283, now seen corresponding path program 111 times [2021-06-05 15:00:57,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:57,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914346082] [2021-06-05 15:00:57,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:57,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:57,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914346082] [2021-06-05 15:00:57,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914346082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:57,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858274255] [2021-06-05 15:00:57,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:57,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 15:00:57,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:57,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:00:57,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:57,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858274255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:57,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:57,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 15:00:57,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375919165] [2021-06-05 15:00:57,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:00:57,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:57,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:00:57,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:00:57,883 INFO L87 Difference]: Start difference. First operand 123270 states and 269455 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:58,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:58,748 INFO L93 Difference]: Finished difference Result 128955 states and 280766 transitions. [2021-06-05 15:00:58,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:58,748 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:00:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:58,906 INFO L225 Difference]: With dead ends: 128955 [2021-06-05 15:00:58,906 INFO L226 Difference]: Without dead ends: 128913 [2021-06-05 15:00:58,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128913 states. [2021-06-05 15:01:00,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128913 to 122990. [2021-06-05 15:01:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122990 states, 122989 states have (on average 2.185553179552643) internal successors, (268799), 122989 states have internal predecessors, (268799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:01,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122990 states to 122990 states and 268799 transitions. [2021-06-05 15:01:01,141 INFO L78 Accepts]: Start accepts. Automaton has 122990 states and 268799 transitions. Word has length 76 [2021-06-05 15:01:01,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:01,141 INFO L482 AbstractCegarLoop]: Abstraction has 122990 states and 268799 transitions. [2021-06-05 15:01:01,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 122990 states and 268799 transitions. [2021-06-05 15:01:01,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:01:01,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:01,252 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:01,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 15:01:01,473 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:01,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1791553903, now seen corresponding path program 112 times [2021-06-05 15:01:01,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:01,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966005882] [2021-06-05 15:01:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 114 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:01:01,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:01,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966005882] [2021-06-05 15:01:01,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966005882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:01,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304939433] [2021-06-05 15:01:01,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:01,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:01,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:01,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:01:01,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 114 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:01:01,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304939433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:01,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:01,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 15:01:01,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784536351] [2021-06-05 15:01:01,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:01:01,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:01,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:01:01,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:01:01,655 INFO L87 Difference]: Start difference. First operand 122990 states and 268799 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:02,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:02,155 INFO L93 Difference]: Finished difference Result 130997 states and 284211 transitions. [2021-06-05 15:01:02,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:01:02,156 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:01:02,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:02,322 INFO L225 Difference]: With dead ends: 130997 [2021-06-05 15:01:02,322 INFO L226 Difference]: Without dead ends: 130997 [2021-06-05 15:01:02,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:01:02,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130997 states. [2021-06-05 15:01:04,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130997 to 123134. [2021-06-05 15:01:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123134 states, 123133 states have (on average 2.1853036960035084) internal successors, (269083), 123133 states have internal predecessors, (269083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:04,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123134 states to 123134 states and 269083 transitions. [2021-06-05 15:01:04,522 INFO L78 Accepts]: Start accepts. Automaton has 123134 states and 269083 transitions. Word has length 76 [2021-06-05 15:01:04,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:04,522 INFO L482 AbstractCegarLoop]: Abstraction has 123134 states and 269083 transitions. [2021-06-05 15:01:04,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:04,522 INFO L276 IsEmpty]: Start isEmpty. Operand 123134 states and 269083 transitions. [2021-06-05 15:01:04,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:01:04,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:04,590 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:04,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 15:01:04,790 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:04,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:04,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2113209467, now seen corresponding path program 113 times [2021-06-05 15:01:04,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:04,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629005312] [2021-06-05 15:01:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:01:04,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:04,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629005312] [2021-06-05 15:01:04,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629005312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:04,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882737350] [2021-06-05 15:01:04,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:04,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 15:01:04,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:04,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:01:04,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:01:04,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882737350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:04,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:04,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 15:01:04,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585005467] [2021-06-05 15:01:04,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:01:04,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:04,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:01:04,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:01:04,977 INFO L87 Difference]: Start difference. First operand 123134 states and 269083 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:05,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:05,436 INFO L93 Difference]: Finished difference Result 145897 states and 315475 transitions. [2021-06-05 15:01:05,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:01:05,436 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:01:05,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:05,617 INFO L225 Difference]: With dead ends: 145897 [2021-06-05 15:01:05,617 INFO L226 Difference]: Without dead ends: 145897 [2021-06-05 15:01:05,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:01:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145897 states. [2021-06-05 15:01:07,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145897 to 123934. [2021-06-05 15:01:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123934 states, 123933 states have (on average 2.184720776548619) internal successors, (270759), 123933 states have internal predecessors, (270759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123934 states to 123934 states and 270759 transitions. [2021-06-05 15:01:07,942 INFO L78 Accepts]: Start accepts. Automaton has 123934 states and 270759 transitions. Word has length 76 [2021-06-05 15:01:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:07,942 INFO L482 AbstractCegarLoop]: Abstraction has 123934 states and 270759 transitions. [2021-06-05 15:01:07,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 123934 states and 270759 transitions. [2021-06-05 15:01:08,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:01:08,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:08,038 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:08,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 15:01:08,262 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:08,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:08,262 INFO L82 PathProgramCache]: Analyzing trace with hash -660344537, now seen corresponding path program 114 times [2021-06-05 15:01:08,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:08,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248800955] [2021-06-05 15:01:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:01:08,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:08,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248800955] [2021-06-05 15:01:08,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248800955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:08,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851578381] [2021-06-05 15:01:08,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:08,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 15:01:08,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:08,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:01:08,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:01:08,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851578381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:08,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:08,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:01:08,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272239712] [2021-06-05 15:01:08,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:01:08,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:08,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:01:08,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:01:08,439 INFO L87 Difference]: Start difference. First operand 123934 states and 270759 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:08,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:08,953 INFO L93 Difference]: Finished difference Result 146309 states and 316555 transitions. [2021-06-05 15:01:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:01:08,954 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:01:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:09,671 INFO L225 Difference]: With dead ends: 146309 [2021-06-05 15:01:09,671 INFO L226 Difference]: Without dead ends: 146309 [2021-06-05 15:01:09,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:01:09,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146309 states. [2021-06-05 15:01:11,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146309 to 124414. [2021-06-05 15:01:11,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124414 states, 124413 states have (on average 2.1839438000852) internal successors, (271711), 124413 states have internal predecessors, (271711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124414 states to 124414 states and 271711 transitions. [2021-06-05 15:01:11,415 INFO L78 Accepts]: Start accepts. Automaton has 124414 states and 271711 transitions. Word has length 76 [2021-06-05 15:01:11,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:11,415 INFO L482 AbstractCegarLoop]: Abstraction has 124414 states and 271711 transitions. [2021-06-05 15:01:11,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:11,415 INFO L276 IsEmpty]: Start isEmpty. Operand 124414 states and 271711 transitions. [2021-06-05 15:01:11,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:01:11,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:11,489 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:11,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 15:01:11,691 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:11,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1773151493, now seen corresponding path program 115 times [2021-06-05 15:01:11,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:11,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141467366] [2021-06-05 15:01:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:01:11,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:11,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141467366] [2021-06-05 15:01:11,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141467366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:11,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384095738] [2021-06-05 15:01:11,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:11,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:01:11,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:01:11,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384095738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:11,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:11,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 15:01:11,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720773496] [2021-06-05 15:01:11,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:01:11,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:11,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:01:11,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:01:11,873 INFO L87 Difference]: Start difference. First operand 124414 states and 271711 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:12,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:12,783 INFO L93 Difference]: Finished difference Result 138029 states and 299093 transitions. [2021-06-05 15:01:12,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:01:12,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:01:12,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:12,941 INFO L225 Difference]: With dead ends: 138029 [2021-06-05 15:01:12,941 INFO L226 Difference]: Without dead ends: 138029 [2021-06-05 15:01:12,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:01:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138029 states. [2021-06-05 15:01:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138029 to 123854. [2021-06-05 15:01:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123854 states, 123853 states have (on average 2.1827085335034275) internal successors, (270335), 123853 states have internal predecessors, (270335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123854 states to 123854 states and 270335 transitions. [2021-06-05 15:01:15,248 INFO L78 Accepts]: Start accepts. Automaton has 123854 states and 270335 transitions. Word has length 76 [2021-06-05 15:01:15,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:15,248 INFO L482 AbstractCegarLoop]: Abstraction has 123854 states and 270335 transitions. [2021-06-05 15:01:15,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:15,248 INFO L276 IsEmpty]: Start isEmpty. Operand 123854 states and 270335 transitions. [2021-06-05 15:01:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:01:15,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:15,391 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:15,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:15,593 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:15,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2048129063, now seen corresponding path program 116 times [2021-06-05 15:01:15,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:15,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067829624] [2021-06-05 15:01:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:15,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:15,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067829624] [2021-06-05 15:01:15,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067829624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:15,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532945327] [2021-06-05 15:01:15,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:15,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:15,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:15,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:01:15,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:15,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532945327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:15,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:15,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 15:01:15,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725015323] [2021-06-05 15:01:15,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:01:15,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:15,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:01:15,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:01:15,782 INFO L87 Difference]: Start difference. First operand 123854 states and 270335 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:16,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:16,211 INFO L93 Difference]: Finished difference Result 128519 states and 279224 transitions. [2021-06-05 15:01:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:01:16,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-06-05 15:01:16,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:16,358 INFO L225 Difference]: With dead ends: 128519 [2021-06-05 15:01:16,358 INFO L226 Difference]: Without dead ends: 128519 [2021-06-05 15:01:16,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:01:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128519 states. [2021-06-05 15:01:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128519 to 117206. [2021-06-05 15:01:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117206 states, 117205 states have (on average 2.179659570837422) internal successors, (255467), 117205 states have internal predecessors, (255467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117206 states to 117206 states and 255467 transitions. [2021-06-05 15:01:18,551 INFO L78 Accepts]: Start accepts. Automaton has 117206 states and 255467 transitions. Word has length 76 [2021-06-05 15:01:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:18,552 INFO L482 AbstractCegarLoop]: Abstraction has 117206 states and 255467 transitions. [2021-06-05 15:01:18,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand 117206 states and 255467 transitions. [2021-06-05 15:01:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:01:18,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:18,619 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:18,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 15:01:18,820 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:18,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:18,820 INFO L82 PathProgramCache]: Analyzing trace with hash -358200709, now seen corresponding path program 117 times [2021-06-05 15:01:18,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:18,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133800379] [2021-06-05 15:01:18,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 15:01:18,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:18,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133800379] [2021-06-05 15:01:18,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133800379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:18,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062265675] [2021-06-05 15:01:18,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:18,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 15:01:18,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:18,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:01:18,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 15:01:19,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062265675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:19,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:19,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 15:01:19,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815720911] [2021-06-05 15:01:19,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:01:19,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:19,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:01:19,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:01:19,007 INFO L87 Difference]: Start difference. First operand 117206 states and 255467 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:19,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:19,444 INFO L93 Difference]: Finished difference Result 128191 states and 279004 transitions. [2021-06-05 15:01:19,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:01:19,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 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 76 [2021-06-05 15:01:19,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:19,608 INFO L225 Difference]: With dead ends: 128191 [2021-06-05 15:01:19,608 INFO L226 Difference]: Without dead ends: 128065 [2021-06-05 15:01:19,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:19,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128065 states. [2021-06-05 15:01:21,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128065 to 122126. [2021-06-05 15:01:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.1861780962128967) internal successors, (266987), 122125 states have internal predecessors, (266987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:21,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266987 transitions. [2021-06-05 15:01:21,720 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266987 transitions. Word has length 76 [2021-06-05 15:01:21,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:21,720 INFO L482 AbstractCegarLoop]: Abstraction has 122126 states and 266987 transitions. [2021-06-05 15:01:21,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266987 transitions. [2021-06-05 15:01:21,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:01:21,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:21,787 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:21,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 15:01:21,988 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:21,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:21,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1595890949, now seen corresponding path program 118 times [2021-06-05 15:01:21,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:21,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374088896] [2021-06-05 15:01:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 15:01:22,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:22,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374088896] [2021-06-05 15:01:22,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374088896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:22,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927116233] [2021-06-05 15:01:22,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:22,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:22,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:22,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:01:22,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 15:01:22,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927116233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:22,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:22,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:01:22,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440978669] [2021-06-05 15:01:22,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:01:22,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:22,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:01:22,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:01:22,187 INFO L87 Difference]: Start difference. First operand 122126 states and 266987 transitions. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:22,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:22,613 INFO L93 Difference]: Finished difference Result 124343 states and 270490 transitions. [2021-06-05 15:01:22,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:01:22,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 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 76 [2021-06-05 15:01:22,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:22,758 INFO L225 Difference]: With dead ends: 124343 [2021-06-05 15:01:22,758 INFO L226 Difference]: Without dead ends: 124247 [2021-06-05 15:01:22,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:22,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124247 states. [2021-06-05 15:01:24,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124247 to 122126. [2021-06-05 15:01:24,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.185523029682702) internal successors, (266907), 122125 states have internal predecessors, (266907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:25,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266907 transitions. [2021-06-05 15:01:25,031 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266907 transitions. Word has length 76 [2021-06-05 15:01:25,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:25,031 INFO L482 AbstractCegarLoop]: Abstraction has 122126 states and 266907 transitions. [2021-06-05 15:01:25,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:25,031 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266907 transitions. [2021-06-05 15:01:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:01:25,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:25,101 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:25,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:25,302 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:25,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:25,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1654539205, now seen corresponding path program 119 times [2021-06-05 15:01:25,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:25,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060795697] [2021-06-05 15:01:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 15:01:25,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:25,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060795697] [2021-06-05 15:01:25,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060795697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:25,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348717498] [2021-06-05 15:01:25,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:25,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 15:01:25,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:25,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:01:25,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 15:01:25,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348717498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:25,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:25,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 15:01:25,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371848139] [2021-06-05 15:01:25,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:01:25,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:25,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:01:25,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:01:25,470 INFO L87 Difference]: Start difference. First operand 122126 states and 266907 transitions. Second operand has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:25,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:25,865 INFO L93 Difference]: Finished difference Result 123893 states and 269670 transitions. [2021-06-05 15:01:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:01:25,866 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 states have internal predecessors, (67), 0 states have call successors, (0), 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 76 [2021-06-05 15:01:25,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:26,011 INFO L225 Difference]: With dead ends: 123893 [2021-06-05 15:01:26,011 INFO L226 Difference]: Without dead ends: 123827 [2021-06-05 15:01:26,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:01:26,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123827 states. [2021-06-05 15:01:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123827 to 122126. [2021-06-05 15:01:28,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.185195496417605) internal successors, (266867), 122125 states have internal predecessors, (266867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:28,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266867 transitions. [2021-06-05 15:01:28,300 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266867 transitions. Word has length 76 [2021-06-05 15:01:28,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:28,300 INFO L482 AbstractCegarLoop]: Abstraction has 122126 states and 266867 transitions. [2021-06-05 15:01:28,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:28,300 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266867 transitions. [2021-06-05 15:01:28,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:01:28,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:28,370 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:28,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:28,570 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:28,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:28,570 INFO L82 PathProgramCache]: Analyzing trace with hash 189567813, now seen corresponding path program 120 times [2021-06-05 15:01:28,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:28,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463072386] [2021-06-05 15:01:28,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:01:28,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:28,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463072386] [2021-06-05 15:01:28,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463072386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:28,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700752797] [2021-06-05 15:01:28,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:28,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 15:01:28,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:28,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:01:28,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-06-05 15:01:28,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700752797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:28,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:28,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 15:01:28,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836365277] [2021-06-05 15:01:28,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:01:28,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:28,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:01:28,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:01:28,839 INFO L87 Difference]: Start difference. First operand 122126 states and 266867 transitions. Second operand has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:29,800 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 15:01:30,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:30,694 INFO L93 Difference]: Finished difference Result 203383 states and 440408 transitions. [2021-06-05 15:01:30,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 15:01:30,694 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 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 76 [2021-06-05 15:01:30,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:30,958 INFO L225 Difference]: With dead ends: 203383 [2021-06-05 15:01:30,958 INFO L226 Difference]: Without dead ends: 203092 [2021-06-05 15:01:30,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 1103.7ms TimeCoverageRelationStatistics Valid=782, Invalid=6190, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 15:01:31,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203092 states. [2021-06-05 15:01:33,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203092 to 153026. [2021-06-05 15:01:33,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153026 states, 153025 states have (on average 2.1853487992158143) internal successors, (334413), 153025 states have internal predecessors, (334413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153026 states to 153026 states and 334413 transitions. [2021-06-05 15:01:33,660 INFO L78 Accepts]: Start accepts. Automaton has 153026 states and 334413 transitions. Word has length 76 [2021-06-05 15:01:33,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:33,660 INFO L482 AbstractCegarLoop]: Abstraction has 153026 states and 334413 transitions. [2021-06-05 15:01:33,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:33,661 INFO L276 IsEmpty]: Start isEmpty. Operand 153026 states and 334413 transitions. [2021-06-05 15:01:33,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:01:33,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:33,739 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:33,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:33,940 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:33,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:33,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1785917094, now seen corresponding path program 121 times [2021-06-05 15:01:33,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:33,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895202099] [2021-06-05 15:01:33,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 144 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:34,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:34,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895202099] [2021-06-05 15:01:34,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895202099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:34,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462260996] [2021-06-05 15:01:34,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:34,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:01:34,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 114 proven. 41 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-06-05 15:01:34,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462260996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:34,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:34,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 15 [2021-06-05 15:01:34,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944402274] [2021-06-05 15:01:34,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:01:34,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:34,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:01:34,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:01:34,152 INFO L87 Difference]: Start difference. First operand 153026 states and 334413 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:35,216 INFO L93 Difference]: Finished difference Result 163078 states and 354025 transitions. [2021-06-05 15:01:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:01:35,217 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 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 76 [2021-06-05 15:01:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:35,416 INFO L225 Difference]: With dead ends: 163078 [2021-06-05 15:01:35,416 INFO L226 Difference]: Without dead ends: 162830 [2021-06-05 15:01:35,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:01:35,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162830 states. [2021-06-05 15:01:37,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162830 to 153130. [2021-06-05 15:01:37,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153130 states, 153129 states have (on average 2.1844392636273993) internal successors, (334501), 153129 states have internal predecessors, (334501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:37,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153130 states to 153130 states and 334501 transitions. [2021-06-05 15:01:37,949 INFO L78 Accepts]: Start accepts. Automaton has 153130 states and 334501 transitions. Word has length 76 [2021-06-05 15:01:37,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:37,949 INFO L482 AbstractCegarLoop]: Abstraction has 153130 states and 334501 transitions. [2021-06-05 15:01:37,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 153130 states and 334501 transitions. [2021-06-05 15:01:38,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 15:01:38,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:38,073 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:38,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 15:01:38,274 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:38,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:38,274 INFO L82 PathProgramCache]: Analyzing trace with hash -316262490, now seen corresponding path program 122 times [2021-06-05 15:01:38,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:38,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304298226] [2021-06-05 15:01:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 132 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:38,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:38,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304298226] [2021-06-05 15:01:38,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304298226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:38,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053132803] [2021-06-05 15:01:38,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:38,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:38,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:38,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:01:38,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 132 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:38,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053132803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:38,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:38,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 15:01:38,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094920644] [2021-06-05 15:01:38,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:01:38,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:38,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:01:38,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:01:38,524 INFO L87 Difference]: Start difference. First operand 153130 states and 334501 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:39,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:39,686 INFO L93 Difference]: Finished difference Result 169486 states and 368744 transitions. [2021-06-05 15:01:39,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:01:39,686 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-06-05 15:01:39,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:39,888 INFO L225 Difference]: With dead ends: 169486 [2021-06-05 15:01:39,888 INFO L226 Difference]: Without dead ends: 169486 [2021-06-05 15:01:39,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:01:40,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169486 states. [2021-06-05 15:01:41,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169486 to 157008. [2021-06-05 15:01:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157008 states, 157007 states have (on average 2.18660951422548) internal successors, (343313), 157007 states have internal predecessors, (343313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:42,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157008 states to 157008 states and 343313 transitions. [2021-06-05 15:01:42,376 INFO L78 Accepts]: Start accepts. Automaton has 157008 states and 343313 transitions. Word has length 86 [2021-06-05 15:01:42,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:42,376 INFO L482 AbstractCegarLoop]: Abstraction has 157008 states and 343313 transitions. [2021-06-05 15:01:42,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 157008 states and 343313 transitions. [2021-06-05 15:01:42,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 15:01:42,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:42,504 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:42,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 15:01:42,706 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:42,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:42,706 INFO L82 PathProgramCache]: Analyzing trace with hash -342094170, now seen corresponding path program 123 times [2021-06-05 15:01:42,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:42,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624207275] [2021-06-05 15:01:42,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 161 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:42,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:42,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624207275] [2021-06-05 15:01:42,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624207275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:42,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740769221] [2021-06-05 15:01:42,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:42,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 15:01:42,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:42,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:01:42,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 161 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:42,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740769221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:42,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:42,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:01:42,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563148355] [2021-06-05 15:01:42,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:01:42,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:42,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:01:42,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:01:42,915 INFO L87 Difference]: Start difference. First operand 157008 states and 343313 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:43,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:43,357 INFO L93 Difference]: Finished difference Result 159720 states and 347802 transitions. [2021-06-05 15:01:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:01:43,358 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-06-05 15:01:43,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:44,106 INFO L225 Difference]: With dead ends: 159720 [2021-06-05 15:01:44,106 INFO L226 Difference]: Without dead ends: 159716 [2021-06-05 15:01:44,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:01:44,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159716 states. [2021-06-05 15:01:45,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159716 to 154858. [2021-06-05 15:01:46,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154858 states, 154857 states have (on average 2.1844734174109015) internal successors, (338281), 154857 states have internal predecessors, (338281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154858 states to 154858 states and 338281 transitions. [2021-06-05 15:01:46,763 INFO L78 Accepts]: Start accepts. Automaton has 154858 states and 338281 transitions. Word has length 86 [2021-06-05 15:01:46,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:46,763 INFO L482 AbstractCegarLoop]: Abstraction has 154858 states and 338281 transitions. [2021-06-05 15:01:46,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:46,763 INFO L276 IsEmpty]: Start isEmpty. Operand 154858 states and 338281 transitions. [2021-06-05 15:01:46,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 15:01:46,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:46,892 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:47,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:47,092 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:47,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:47,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1880023924, now seen corresponding path program 124 times [2021-06-05 15:01:47,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:47,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419669434] [2021-06-05 15:01:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 154 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:47,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:47,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419669434] [2021-06-05 15:01:47,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419669434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:47,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673355244] [2021-06-05 15:01:47,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:47,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:47,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:47,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:01:47,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 150 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:01:47,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673355244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:47,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:47,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2021-06-05 15:01:47,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891385630] [2021-06-05 15:01:47,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:01:47,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:47,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:01:47,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:01:47,356 INFO L87 Difference]: Start difference. First operand 154858 states and 338281 transitions. Second operand has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:48,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:48,032 INFO L93 Difference]: Finished difference Result 164918 states and 359351 transitions. [2021-06-05 15:01:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:01:48,032 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 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 86 [2021-06-05 15:01:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:48,236 INFO L225 Difference]: With dead ends: 164918 [2021-06-05 15:01:48,236 INFO L226 Difference]: Without dead ends: 164914 [2021-06-05 15:01:48,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=311, Invalid=745, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:01:48,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164914 states. [2021-06-05 15:01:50,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164914 to 155138. [2021-06-05 15:01:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155138 states, 155137 states have (on average 2.1851718158788684) internal successors, (339001), 155137 states have internal predecessors, (339001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155138 states to 155138 states and 339001 transitions. [2021-06-05 15:01:50,797 INFO L78 Accepts]: Start accepts. Automaton has 155138 states and 339001 transitions. Word has length 86 [2021-06-05 15:01:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:50,797 INFO L482 AbstractCegarLoop]: Abstraction has 155138 states and 339001 transitions. [2021-06-05 15:01:50,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:50,798 INFO L276 IsEmpty]: Start isEmpty. Operand 155138 states and 339001 transitions. [2021-06-05 15:01:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 15:01:51,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:51,709 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:51,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 15:01:51,916 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:51,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1015661798, now seen corresponding path program 125 times [2021-06-05 15:01:51,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:51,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624965632] [2021-06-05 15:01:51,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:52,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:52,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624965632] [2021-06-05 15:01:52,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624965632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:52,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372271463] [2021-06-05 15:01:52,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:52,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 15:01:52,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:52,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:01:52,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 146 proven. 87 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 15:01:52,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372271463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:52,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:52,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2021-06-05 15:01:52,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817203040] [2021-06-05 15:01:52,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:01:52,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:52,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:01:52,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:01:52,236 INFO L87 Difference]: Start difference. First operand 155138 states and 339001 transitions. Second operand has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:53,197 INFO L93 Difference]: Finished difference Result 162401 states and 354857 transitions. [2021-06-05 15:01:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:01:53,197 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 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 86 [2021-06-05 15:01:53,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:53,424 INFO L225 Difference]: With dead ends: 162401 [2021-06-05 15:01:53,424 INFO L226 Difference]: Without dead ends: 162246 [2021-06-05 15:01:53,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 370.0ms TimeCoverageRelationStatistics Valid=458, Invalid=1102, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:01:53,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162246 states. [2021-06-05 15:01:55,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162246 to 154498. [2021-06-05 15:01:55,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154498 states, 154497 states have (on average 2.185110390493019) internal successors, (337593), 154497 states have internal predecessors, (337593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:55,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154498 states to 154498 states and 337593 transitions. [2021-06-05 15:01:55,700 INFO L78 Accepts]: Start accepts. Automaton has 154498 states and 337593 transitions. Word has length 86 [2021-06-05 15:01:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:55,701 INFO L482 AbstractCegarLoop]: Abstraction has 154498 states and 337593 transitions. [2021-06-05 15:01:55,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 154498 states and 337593 transitions. [2021-06-05 15:01:55,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 15:01:55,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:55,828 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:56,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 15:01:56,028 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:56,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:56,029 INFO L82 PathProgramCache]: Analyzing trace with hash 381795686, now seen corresponding path program 126 times [2021-06-05 15:01:56,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:56,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942047252] [2021-06-05 15:01:56,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 75 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 15:01:56,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:56,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942047252] [2021-06-05 15:01:56,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942047252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:56,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080830557] [2021-06-05 15:01:56,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:56,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 15:01:56,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:56,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:01:56,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 75 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 15:01:56,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080830557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:56,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:56,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 15:01:56,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030154406] [2021-06-05 15:01:56,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:01:56,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:56,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:01:56,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:01:56,218 INFO L87 Difference]: Start difference. First operand 154498 states and 337593 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:57,379 INFO L93 Difference]: Finished difference Result 187447 states and 406719 transitions. [2021-06-05 15:01:57,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:01:57,380 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 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 86 [2021-06-05 15:01:57,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:57,598 INFO L225 Difference]: With dead ends: 187447 [2021-06-05 15:01:57,598 INFO L226 Difference]: Without dead ends: 187447 [2021-06-05 15:01:57,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:01:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187447 states. [2021-06-05 15:01:59,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187447 to 159330. [2021-06-05 15:01:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159330 states, 159329 states have (on average 2.1893126800519678) internal successors, (348821), 159329 states have internal predecessors, (348821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:00,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159330 states to 159330 states and 348821 transitions. [2021-06-05 15:02:00,201 INFO L78 Accepts]: Start accepts. Automaton has 159330 states and 348821 transitions. Word has length 86 [2021-06-05 15:02:00,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:00,201 INFO L482 AbstractCegarLoop]: Abstraction has 159330 states and 348821 transitions. [2021-06-05 15:02:00,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:00,201 INFO L276 IsEmpty]: Start isEmpty. Operand 159330 states and 348821 transitions. [2021-06-05 15:02:00,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 15:02:00,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:00,327 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:00,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 15:02:00,528 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:00,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:00,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1887951014, now seen corresponding path program 127 times [2021-06-05 15:02:00,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:00,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943932412] [2021-06-05 15:02:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 110 proven. 120 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 15:02:00,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:00,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943932412] [2021-06-05 15:02:00,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943932412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:00,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250239318] [2021-06-05 15:02:00,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:00,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:02:00,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 108 proven. 126 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 15:02:00,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250239318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:00,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:00,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 15:02:00,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239324935] [2021-06-05 15:02:00,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:02:00,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:00,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:02:00,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:02:00,704 INFO L87 Difference]: Start difference. First operand 159330 states and 348821 transitions. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:01,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:01,850 INFO L93 Difference]: Finished difference Result 195387 states and 423182 transitions. [2021-06-05 15:02:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:02:01,851 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 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 86 [2021-06-05 15:02:01,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:02,076 INFO L225 Difference]: With dead ends: 195387 [2021-06-05 15:02:02,076 INFO L226 Difference]: Without dead ends: 195323 [2021-06-05 15:02:02,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:02:02,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195323 states. [2021-06-05 15:02:04,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195323 to 159302. [2021-06-05 15:02:04,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159302 states, 159301 states have (on average 2.1885926642017313) internal successors, (348645), 159301 states have internal predecessors, (348645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:04,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159302 states to 159302 states and 348645 transitions. [2021-06-05 15:02:04,774 INFO L78 Accepts]: Start accepts. Automaton has 159302 states and 348645 transitions. Word has length 86 [2021-06-05 15:02:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:04,774 INFO L482 AbstractCegarLoop]: Abstraction has 159302 states and 348645 transitions. [2021-06-05 15:02:04,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:04,774 INFO L276 IsEmpty]: Start isEmpty. Operand 159302 states and 348645 transitions. [2021-06-05 15:02:04,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 15:02:04,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:04,903 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:05,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:05,104 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:05,104 INFO L82 PathProgramCache]: Analyzing trace with hash -565732340, now seen corresponding path program 128 times [2021-06-05 15:02:05,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:05,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782007678] [2021-06-05 15:02:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 101 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:02:05,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:05,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782007678] [2021-06-05 15:02:05,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782007678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:05,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260907211] [2021-06-05 15:02:05,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:05,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:05,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:05,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:02:05,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 131 proven. 103 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 15:02:05,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260907211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:05,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:05,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 15:02:05,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088339620] [2021-06-05 15:02:05,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:05,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:05,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:05,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:05,287 INFO L87 Difference]: Start difference. First operand 159302 states and 348645 transitions. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:06,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:06,435 INFO L93 Difference]: Finished difference Result 177150 states and 384101 transitions. [2021-06-05 15:02:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:02:06,435 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 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 86 [2021-06-05 15:02:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:06,643 INFO L225 Difference]: With dead ends: 177150 [2021-06-05 15:02:06,643 INFO L226 Difference]: Without dead ends: 177126 [2021-06-05 15:02:06,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:02:06,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177126 states. [2021-06-05 15:02:08,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177126 to 159386. [2021-06-05 15:02:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159386 states, 159385 states have (on average 2.1882674028296263) internal successors, (348777), 159385 states have internal predecessors, (348777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159386 states to 159386 states and 348777 transitions. [2021-06-05 15:02:09,316 INFO L78 Accepts]: Start accepts. Automaton has 159386 states and 348777 transitions. Word has length 86 [2021-06-05 15:02:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:09,316 INFO L482 AbstractCegarLoop]: Abstraction has 159386 states and 348777 transitions. [2021-06-05 15:02:09,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 159386 states and 348777 transitions. [2021-06-05 15:02:09,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 15:02:09,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:09,465 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:09,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:09,666 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:09,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:09,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2093645926, now seen corresponding path program 129 times [2021-06-05 15:02:09,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:09,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298189709] [2021-06-05 15:02:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 104 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:02:09,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:09,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298189709] [2021-06-05 15:02:09,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298189709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:09,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684488856] [2021-06-05 15:02:09,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:09,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 15:02:09,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:09,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:02:09,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-06-05 15:02:09,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684488856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:09,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:09,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-06-05 15:02:09,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158679074] [2021-06-05 15:02:09,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:09,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:09,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:09,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:09,961 INFO L87 Difference]: Start difference. First operand 159386 states and 348777 transitions. Second operand has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:12,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:12,642 INFO L93 Difference]: Finished difference Result 275251 states and 593414 transitions. [2021-06-05 15:02:12,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 15:02:12,643 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 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 86 [2021-06-05 15:02:12,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:13,491 INFO L225 Difference]: With dead ends: 275251 [2021-06-05 15:02:13,491 INFO L226 Difference]: Without dead ends: 275139 [2021-06-05 15:02:13,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4118 ImplicationChecksByTransitivity, 1059.2ms TimeCoverageRelationStatistics Valid=1037, Invalid=10519, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 15:02:13,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275139 states. [2021-06-05 15:02:16,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275139 to 204668. [2021-06-05 15:02:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204668 states, 204667 states have (on average 2.1685713866915526) internal successors, (443835), 204667 states have internal predecessors, (443835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204668 states to 204668 states and 443835 transitions. [2021-06-05 15:02:17,302 INFO L78 Accepts]: Start accepts. Automaton has 204668 states and 443835 transitions. Word has length 86 [2021-06-05 15:02:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:17,302 INFO L482 AbstractCegarLoop]: Abstraction has 204668 states and 443835 transitions. [2021-06-05 15:02:17,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:17,302 INFO L276 IsEmpty]: Start isEmpty. Operand 204668 states and 443835 transitions. [2021-06-05 15:02:17,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 15:02:17,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:17,418 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:17,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:17,619 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:17,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:17,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1967004549, now seen corresponding path program 130 times [2021-06-05 15:02:17,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:17,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128862774] [2021-06-05 15:02:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 196 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:17,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:17,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128862774] [2021-06-05 15:02:17,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128862774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:17,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786034460] [2021-06-05 15:02:17,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:17,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:17,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:17,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:02:17,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 144 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:02:17,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786034460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:17,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:17,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2021-06-05 15:02:17,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011610323] [2021-06-05 15:02:17,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:02:17,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:17,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:02:17,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:02:17,894 INFO L87 Difference]: Start difference. First operand 204668 states and 443835 transitions. Second operand has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:18,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:18,782 INFO L93 Difference]: Finished difference Result 247113 states and 534129 transitions. [2021-06-05 15:02:18,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:02:18,782 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 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 86 [2021-06-05 15:02:18,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:19,766 INFO L225 Difference]: With dead ends: 247113 [2021-06-05 15:02:19,766 INFO L226 Difference]: Without dead ends: 247095 [2021-06-05 15:02:19,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 252.3ms TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:02:19,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247095 states. [2021-06-05 15:02:22,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247095 to 223232. [2021-06-05 15:02:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223232 states, 223231 states have (on average 2.1722565414301775) internal successors, (484915), 223231 states have internal predecessors, (484915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223232 states to 223232 states and 484915 transitions. [2021-06-05 15:02:23,425 INFO L78 Accepts]: Start accepts. Automaton has 223232 states and 484915 transitions. Word has length 86 [2021-06-05 15:02:23,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:23,425 INFO L482 AbstractCegarLoop]: Abstraction has 223232 states and 484915 transitions. [2021-06-05 15:02:23,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:23,426 INFO L276 IsEmpty]: Start isEmpty. Operand 223232 states and 484915 transitions. [2021-06-05 15:02:23,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 15:02:23,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:23,549 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:23,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-05 15:02:23,749 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:23,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:23,750 INFO L82 PathProgramCache]: Analyzing trace with hash 454346087, now seen corresponding path program 131 times [2021-06-05 15:02:23,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:23,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630134993] [2021-06-05 15:02:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 106 proven. 132 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:02:23,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:23,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630134993] [2021-06-05 15:02:23,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630134993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:23,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350007719] [2021-06-05 15:02:23,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:23,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:02:23,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:23,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:02:23,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 15:02:23,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350007719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:23,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:23,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 15:02:23,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780299101] [2021-06-05 15:02:23,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:02:23,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:23,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:02:23,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:23,967 INFO L87 Difference]: Start difference. First operand 223232 states and 484915 transitions. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:24,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:24,687 INFO L93 Difference]: Finished difference Result 226999 states and 490880 transitions. [2021-06-05 15:02:24,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:02:24,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 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 86 [2021-06-05 15:02:24,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:24,968 INFO L225 Difference]: With dead ends: 226999 [2021-06-05 15:02:24,968 INFO L226 Difference]: Without dead ends: 226645 [2021-06-05 15:02:24,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:02:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226645 states. [2021-06-05 15:02:28,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226645 to 217428. [2021-06-05 15:02:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217428 states, 217427 states have (on average 2.1668835977132557) internal successors, (471139), 217427 states have internal predecessors, (471139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:28,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217428 states to 217428 states and 471139 transitions. [2021-06-05 15:02:28,655 INFO L78 Accepts]: Start accepts. Automaton has 217428 states and 471139 transitions. Word has length 86 [2021-06-05 15:02:28,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:28,655 INFO L482 AbstractCegarLoop]: Abstraction has 217428 states and 471139 transitions. [2021-06-05 15:02:28,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:28,656 INFO L276 IsEmpty]: Start isEmpty. Operand 217428 states and 471139 transitions. [2021-06-05 15:02:29,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 15:02:29,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:29,469 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:29,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:29,670 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:29,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:29,670 INFO L82 PathProgramCache]: Analyzing trace with hash -400900165, now seen corresponding path program 132 times [2021-06-05 15:02:29,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:29,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233613914] [2021-06-05 15:02:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:02:29,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:29,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233613914] [2021-06-05 15:02:29,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233613914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:29,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177329629] [2021-06-05 15:02:29,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:29,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 15:02:29,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:29,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:02:29,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:02:29,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177329629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:29,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:29,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:02:29,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976067393] [2021-06-05 15:02:29,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:29,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:29,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:29,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:29,874 INFO L87 Difference]: Start difference. First operand 217428 states and 471139 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:30,502 INFO L93 Difference]: Finished difference Result 237756 states and 514448 transitions. [2021-06-05 15:02:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:02:30,502 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-06-05 15:02:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:30,785 INFO L225 Difference]: With dead ends: 237756 [2021-06-05 15:02:30,785 INFO L226 Difference]: Without dead ends: 237672 [2021-06-05 15:02:30,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:02:31,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237672 states. [2021-06-05 15:02:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237672 to 232076. [2021-06-05 15:02:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232076 states, 232075 states have (on average 2.170931810837014) internal successors, (503819), 232075 states have internal predecessors, (503819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232076 states to 232076 states and 503819 transitions. [2021-06-05 15:02:34,617 INFO L78 Accepts]: Start accepts. Automaton has 232076 states and 503819 transitions. Word has length 86 [2021-06-05 15:02:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:34,617 INFO L482 AbstractCegarLoop]: Abstraction has 232076 states and 503819 transitions. [2021-06-05 15:02:34,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:34,618 INFO L276 IsEmpty]: Start isEmpty. Operand 232076 states and 503819 transitions. [2021-06-05 15:02:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 15:02:34,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:34,758 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:34,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 15:02:34,958 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:34,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:34,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1535732903, now seen corresponding path program 133 times [2021-06-05 15:02:34,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:34,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248969766] [2021-06-05 15:02:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 141 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:35,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:35,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248969766] [2021-06-05 15:02:35,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248969766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:35,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902675920] [2021-06-05 15:02:35,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:35,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:02:35,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:35,772 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 15:02:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 141 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:35,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902675920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:35,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:35,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 15:02:35,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192402689] [2021-06-05 15:02:35,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:02:35,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:35,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:02:35,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:02:35,834 INFO L87 Difference]: Start difference. First operand 232076 states and 503819 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:36,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:36,734 INFO L93 Difference]: Finished difference Result 252517 states and 547531 transitions. [2021-06-05 15:02:36,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:02:36,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-06-05 15:02:36,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:37,096 INFO L225 Difference]: With dead ends: 252517 [2021-06-05 15:02:37,096 INFO L226 Difference]: Without dead ends: 252517 [2021-06-05 15:02:37,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:02:37,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252517 states. [2021-06-05 15:02:40,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252517 to 241564. [2021-06-05 15:02:40,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241564 states, 241563 states have (on average 2.17548631205938) internal successors, (525517), 241563 states have internal predecessors, (525517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241564 states to 241564 states and 525517 transitions. [2021-06-05 15:02:41,612 INFO L78 Accepts]: Start accepts. Automaton has 241564 states and 525517 transitions. Word has length 86 [2021-06-05 15:02:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:41,612 INFO L482 AbstractCegarLoop]: Abstraction has 241564 states and 525517 transitions. [2021-06-05 15:02:41,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:41,612 INFO L276 IsEmpty]: Start isEmpty. Operand 241564 states and 525517 transitions. [2021-06-05 15:02:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:02:42,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:42,280 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:42,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:42,497 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:42,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:42,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1737688229, now seen corresponding path program 134 times [2021-06-05 15:02:42,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:42,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803713955] [2021-06-05 15:02:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 169 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:42,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:42,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803713955] [2021-06-05 15:02:42,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803713955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:42,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018794636] [2021-06-05 15:02:42,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:42,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:42,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:42,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:02:42,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 169 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:42,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018794636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:42,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:42,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 15:02:42,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968009239] [2021-06-05 15:02:42,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:02:42,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:42,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:02:42,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:02:42,845 INFO L87 Difference]: Start difference. First operand 241564 states and 525517 transitions. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:44,151 INFO L93 Difference]: Finished difference Result 283927 states and 618212 transitions. [2021-06-05 15:02:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:02:44,151 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:02:44,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:44,652 INFO L225 Difference]: With dead ends: 283927 [2021-06-05 15:02:44,652 INFO L226 Difference]: Without dead ends: 283661 [2021-06-05 15:02:44,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=449, Invalid=883, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:02:45,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283661 states. [2021-06-05 15:02:48,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283661 to 277706. [2021-06-05 15:02:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277706 states, 277705 states have (on average 2.1876415620892673) internal successors, (607519), 277705 states have internal predecessors, (607519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277706 states to 277706 states and 607519 transitions. [2021-06-05 15:02:50,151 INFO L78 Accepts]: Start accepts. Automaton has 277706 states and 607519 transitions. Word has length 96 [2021-06-05 15:02:50,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:50,151 INFO L482 AbstractCegarLoop]: Abstraction has 277706 states and 607519 transitions. [2021-06-05 15:02:50,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 277706 states and 607519 transitions. [2021-06-05 15:02:50,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:02:50,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:50,347 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:50,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 15:02:50,556 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:50,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:50,556 INFO L82 PathProgramCache]: Analyzing trace with hash -232879921, now seen corresponding path program 135 times [2021-06-05 15:02:50,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:50,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27374914] [2021-06-05 15:02:50,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:50,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:50,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27374914] [2021-06-05 15:02:50,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27374914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:50,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792234457] [2021-06-05 15:02:50,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:50,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 15:02:50,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:50,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:02:50,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:50,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792234457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:50,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:50,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:02:50,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525371242] [2021-06-05 15:02:50,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:50,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:50,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:50,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:50,787 INFO L87 Difference]: Start difference. First operand 277706 states and 607519 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:52,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:52,359 INFO L93 Difference]: Finished difference Result 283289 states and 617046 transitions. [2021-06-05 15:02:52,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:02:52,359 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:02:52,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:52,688 INFO L225 Difference]: With dead ends: 283289 [2021-06-05 15:02:52,688 INFO L226 Difference]: Without dead ends: 283289 [2021-06-05 15:02:52,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:02:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283289 states. [2021-06-05 15:02:55,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283289 to 273694. [2021-06-05 15:02:56,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273694 states, 273693 states have (on average 2.184911561494083) internal successors, (597995), 273693 states have internal predecessors, (597995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273694 states to 273694 states and 597995 transitions. [2021-06-05 15:02:57,398 INFO L78 Accepts]: Start accepts. Automaton has 273694 states and 597995 transitions. Word has length 96 [2021-06-05 15:02:57,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:57,398 INFO L482 AbstractCegarLoop]: Abstraction has 273694 states and 597995 transitions. [2021-06-05 15:02:57,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,398 INFO L276 IsEmpty]: Start isEmpty. Operand 273694 states and 597995 transitions. [2021-06-05 15:02:57,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:02:57,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:57,619 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:57,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 15:02:57,820 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:57,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:57,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1493261733, now seen corresponding path program 136 times [2021-06-05 15:02:57,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:57,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232687756] [2021-06-05 15:02:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:02:57,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:57,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232687756] [2021-06-05 15:02:57,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232687756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:57,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258629857] [2021-06-05 15:02:57,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:57,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:57,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:57,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:02:57,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:02:58,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258629857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:58,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:58,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:02:58,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35983478] [2021-06-05 15:02:58,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:58,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:58,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:58,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:58,028 INFO L87 Difference]: Start difference. First operand 273694 states and 597995 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:58,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:58,851 INFO L93 Difference]: Finished difference Result 283158 states and 616236 transitions. [2021-06-05 15:02:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:02:58,851 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:02:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:59,919 INFO L225 Difference]: With dead ends: 283158 [2021-06-05 15:02:59,919 INFO L226 Difference]: Without dead ends: 283152 [2021-06-05 15:02:59,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:03:00,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283152 states. [2021-06-05 15:03:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283152 to 277546. [2021-06-05 15:03:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277546 states, 277545 states have (on average 2.1873894323443044) internal successors, (607099), 277545 states have internal predecessors, (607099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277546 states to 277546 states and 607099 transitions. [2021-06-05 15:03:04,669 INFO L78 Accepts]: Start accepts. Automaton has 277546 states and 607099 transitions. Word has length 96 [2021-06-05 15:03:04,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:04,669 INFO L482 AbstractCegarLoop]: Abstraction has 277546 states and 607099 transitions. [2021-06-05 15:03:04,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:04,669 INFO L276 IsEmpty]: Start isEmpty. Operand 277546 states and 607099 transitions. [2021-06-05 15:03:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:03:04,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:04,857 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:05,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:05,061 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:05,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:05,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1188536113, now seen corresponding path program 137 times [2021-06-05 15:03:05,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:05,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679243646] [2021-06-05 15:03:05,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 147 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:03:05,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:05,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679243646] [2021-06-05 15:03:05,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679243646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:05,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670545221] [2021-06-05 15:03:05,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:05,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 15:03:05,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:05,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:05,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 147 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:03:05,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670545221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:05,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:05,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:03:05,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576196278] [2021-06-05 15:03:05,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:05,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:05,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:05,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:05,273 INFO L87 Difference]: Start difference. First operand 277546 states and 607099 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:06,904 INFO L93 Difference]: Finished difference Result 287744 states and 625793 transitions. [2021-06-05 15:03:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:03:06,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:03:06,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:07,254 INFO L225 Difference]: With dead ends: 287744 [2021-06-05 15:03:07,255 INFO L226 Difference]: Without dead ends: 287744 [2021-06-05 15:03:07,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:03:07,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287744 states. [2021-06-05 15:03:10,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287744 to 277562. [2021-06-05 15:03:11,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277562 states, 277561 states have (on average 2.1872056953246313) internal successors, (607083), 277561 states have internal predecessors, (607083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277562 states to 277562 states and 607083 transitions. [2021-06-05 15:03:12,263 INFO L78 Accepts]: Start accepts. Automaton has 277562 states and 607083 transitions. Word has length 96 [2021-06-05 15:03:12,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:12,263 INFO L482 AbstractCegarLoop]: Abstraction has 277562 states and 607083 transitions. [2021-06-05 15:03:12,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:12,263 INFO L276 IsEmpty]: Start isEmpty. Operand 277562 states and 607083 transitions. [2021-06-05 15:03:12,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:03:12,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:12,455 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:12,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 15:03:12,655 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:12,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:12,656 INFO L82 PathProgramCache]: Analyzing trace with hash -798332187, now seen corresponding path program 138 times [2021-06-05 15:03:12,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:12,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342272481] [2021-06-05 15:03:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:12,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:12,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342272481] [2021-06-05 15:03:12,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342272481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:12,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586148700] [2021-06-05 15:03:12,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:12,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 15:03:12,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:12,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:12,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:12,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586148700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:12,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:12,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 15:03:12,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278332550] [2021-06-05 15:03:12,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:12,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:12,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:12,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:12,873 INFO L87 Difference]: Start difference. First operand 277562 states and 607083 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:14,435 INFO L93 Difference]: Finished difference Result 287474 states and 626678 transitions. [2021-06-05 15:03:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:03:14,436 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:03:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:14,803 INFO L225 Difference]: With dead ends: 287474 [2021-06-05 15:03:14,803 INFO L226 Difference]: Without dead ends: 287474 [2021-06-05 15:03:14,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:15,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287474 states. [2021-06-05 15:03:18,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287474 to 273034. [2021-06-05 15:03:18,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273034 states, 273033 states have (on average 2.184860438115539) internal successors, (596539), 273033 states have internal predecessors, (596539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273034 states to 273034 states and 596539 transitions. [2021-06-05 15:03:19,701 INFO L78 Accepts]: Start accepts. Automaton has 273034 states and 596539 transitions. Word has length 96 [2021-06-05 15:03:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:19,701 INFO L482 AbstractCegarLoop]: Abstraction has 273034 states and 596539 transitions. [2021-06-05 15:03:19,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 273034 states and 596539 transitions. [2021-06-05 15:03:19,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:03:19,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:19,886 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:20,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:20,089 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:20,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:20,089 INFO L82 PathProgramCache]: Analyzing trace with hash 529753287, now seen corresponding path program 139 times [2021-06-05 15:03:20,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:20,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586610379] [2021-06-05 15:03:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 168 proven. 128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:03:20,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:20,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586610379] [2021-06-05 15:03:20,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586610379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:20,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446598114] [2021-06-05 15:03:20,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:20,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:20,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 168 proven. 128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:03:20,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446598114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:20,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:20,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:03:20,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224635143] [2021-06-05 15:03:20,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:20,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:20,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:20,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:20,291 INFO L87 Difference]: Start difference. First operand 273034 states and 596539 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:21,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:21,851 INFO L93 Difference]: Finished difference Result 292897 states and 638403 transitions. [2021-06-05 15:03:21,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:03:21,851 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 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 96 [2021-06-05 15:03:21,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:22,192 INFO L225 Difference]: With dead ends: 292897 [2021-06-05 15:03:22,192 INFO L226 Difference]: Without dead ends: 292861 [2021-06-05 15:03:22,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:03:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292861 states. [2021-06-05 15:03:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292861 to 277790. [2021-06-05 15:03:25,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277790 states, 277789 states have (on average 2.1869656465878777) internal successors, (607515), 277789 states have internal predecessors, (607515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:27,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277790 states to 277790 states and 607515 transitions. [2021-06-05 15:03:27,415 INFO L78 Accepts]: Start accepts. Automaton has 277790 states and 607515 transitions. Word has length 96 [2021-06-05 15:03:27,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:27,415 INFO L482 AbstractCegarLoop]: Abstraction has 277790 states and 607515 transitions. [2021-06-05 15:03:27,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:27,416 INFO L276 IsEmpty]: Start isEmpty. Operand 277790 states and 607515 transitions. [2021-06-05 15:03:27,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:03:27,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:27,688 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:27,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:27,905 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:27,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2053890469, now seen corresponding path program 140 times [2021-06-05 15:03:27,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:27,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622857848] [2021-06-05 15:03:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:03:27,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:27,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622857848] [2021-06-05 15:03:27,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622857848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:27,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088002360] [2021-06-05 15:03:27,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:28,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:28,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:28,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:28,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:03:28,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088002360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:28,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:28,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:03:28,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419669917] [2021-06-05 15:03:28,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:28,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:28,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:28,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:28,174 INFO L87 Difference]: Start difference. First operand 277790 states and 607515 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:29,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:29,336 INFO L93 Difference]: Finished difference Result 289842 states and 631433 transitions. [2021-06-05 15:03:29,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:03:29,337 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:03:29,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:30,455 INFO L225 Difference]: With dead ends: 289842 [2021-06-05 15:03:30,456 INFO L226 Difference]: Without dead ends: 289806 [2021-06-05 15:03:30,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:03:30,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289806 states. [2021-06-05 15:03:34,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289806 to 279306. [2021-06-05 15:03:34,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279306 states, 279305 states have (on average 2.1874259322246288) internal successors, (610959), 279305 states have internal predecessors, (610959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279306 states to 279306 states and 610959 transitions. [2021-06-05 15:03:35,521 INFO L78 Accepts]: Start accepts. Automaton has 279306 states and 610959 transitions. Word has length 96 [2021-06-05 15:03:35,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:35,521 INFO L482 AbstractCegarLoop]: Abstraction has 279306 states and 610959 transitions. [2021-06-05 15:03:35,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,521 INFO L276 IsEmpty]: Start isEmpty. Operand 279306 states and 610959 transitions. [2021-06-05 15:03:35,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:03:35,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:35,817 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:36,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:36,017 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:36,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:36,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1749164849, now seen corresponding path program 141 times [2021-06-05 15:03:36,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:36,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076621879] [2021-06-05 15:03:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:03:36,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:36,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076621879] [2021-06-05 15:03:36,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076621879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:36,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641480907] [2021-06-05 15:03:36,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:36,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 15:03:36,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:36,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:36,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:03:36,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641480907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:36,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:36,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:03:36,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290758267] [2021-06-05 15:03:36,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:36,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:36,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:36,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:36,224 INFO L87 Difference]: Start difference. First operand 279306 states and 610959 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:37,062 INFO L93 Difference]: Finished difference Result 293716 states and 638382 transitions. [2021-06-05 15:03:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:03:37,063 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:03:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:38,107 INFO L225 Difference]: With dead ends: 293716 [2021-06-05 15:03:38,107 INFO L226 Difference]: Without dead ends: 293716 [2021-06-05 15:03:38,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:03:38,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293716 states. [2021-06-05 15:03:41,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293716 to 279290. [2021-06-05 15:03:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279290 states, 279289 states have (on average 2.1870356512429776) internal successors, (610815), 279289 states have internal predecessors, (610815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279290 states to 279290 states and 610815 transitions. [2021-06-05 15:03:42,912 INFO L78 Accepts]: Start accepts. Automaton has 279290 states and 610815 transitions. Word has length 96 [2021-06-05 15:03:42,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:42,912 INFO L482 AbstractCegarLoop]: Abstraction has 279290 states and 610815 transitions. [2021-06-05 15:03:42,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 279290 states and 610815 transitions. [2021-06-05 15:03:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:03:43,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:43,112 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:43,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:43,313 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:43,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1358960923, now seen corresponding path program 142 times [2021-06-05 15:03:43,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:43,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080023237] [2021-06-05 15:03:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 170 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:03:43,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:43,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080023237] [2021-06-05 15:03:43,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080023237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:43,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750850904] [2021-06-05 15:03:43,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:43,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:43,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:43,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:43,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 170 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:03:43,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750850904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:43,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:43,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 15:03:43,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111577600] [2021-06-05 15:03:43,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:43,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:43,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:43,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:43,524 INFO L87 Difference]: Start difference. First operand 279290 states and 610815 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:45,096 INFO L93 Difference]: Finished difference Result 305876 states and 664178 transitions. [2021-06-05 15:03:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:45,096 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:03:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:45,510 INFO L225 Difference]: With dead ends: 305876 [2021-06-05 15:03:45,510 INFO L226 Difference]: Without dead ends: 305876 [2021-06-05 15:03:45,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:03:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305876 states. [2021-06-05 15:03:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305876 to 279450. [2021-06-05 15:03:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279450 states, 279449 states have (on average 2.186928562993605) internal successors, (611135), 279449 states have internal predecessors, (611135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279450 states to 279450 states and 611135 transitions. [2021-06-05 15:03:50,517 INFO L78 Accepts]: Start accepts. Automaton has 279450 states and 611135 transitions. Word has length 96 [2021-06-05 15:03:50,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:50,517 INFO L482 AbstractCegarLoop]: Abstraction has 279450 states and 611135 transitions. [2021-06-05 15:03:50,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:50,517 INFO L276 IsEmpty]: Start isEmpty. Operand 279450 states and 611135 transitions. [2021-06-05 15:03:50,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:03:50,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:50,712 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:50,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-05 15:03:50,912 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:50,913 INFO L82 PathProgramCache]: Analyzing trace with hash 93904007, now seen corresponding path program 143 times [2021-06-05 15:03:50,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:50,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854491673] [2021-06-05 15:03:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:50,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:50,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854491673] [2021-06-05 15:03:50,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854491673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:50,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110787634] [2021-06-05 15:03:50,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:51,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 15:03:51,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:51,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:51,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:51,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110787634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:51,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:51,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 15:03:51,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906245165] [2021-06-05 15:03:51,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:03:51,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:51,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:03:51,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:03:51,130 INFO L87 Difference]: Start difference. First operand 279450 states and 611135 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:52,641 INFO L93 Difference]: Finished difference Result 291374 states and 635903 transitions. [2021-06-05 15:03:52,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:03:52,641 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:03:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:53,005 INFO L225 Difference]: With dead ends: 291374 [2021-06-05 15:03:53,006 INFO L226 Difference]: Without dead ends: 291374 [2021-06-05 15:03:53,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:03:53,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291374 states. [2021-06-05 15:03:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291374 to 275266. [2021-06-05 15:03:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275266 states, 275265 states have (on average 2.185221513813961) internal successors, (601515), 275265 states have internal predecessors, (601515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275266 states to 275266 states and 601515 transitions. [2021-06-05 15:03:57,996 INFO L78 Accepts]: Start accepts. Automaton has 275266 states and 601515 transitions. Word has length 96 [2021-06-05 15:03:57,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:57,996 INFO L482 AbstractCegarLoop]: Abstraction has 275266 states and 601515 transitions. [2021-06-05 15:03:57,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,996 INFO L276 IsEmpty]: Start isEmpty. Operand 275266 states and 601515 transitions. [2021-06-05 15:03:58,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:03:58,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:58,207 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:58,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 15:03:58,407 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:58,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:58,407 INFO L82 PathProgramCache]: Analyzing trace with hash 211982491, now seen corresponding path program 144 times [2021-06-05 15:03:58,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:58,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227146665] [2021-06-05 15:03:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 15:03:58,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:58,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227146665] [2021-06-05 15:03:58,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227146665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:58,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323227858] [2021-06-05 15:03:58,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:58,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 15:03:58,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:58,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:58,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 15:03:58,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323227858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:58,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:58,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:03:58,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749663194] [2021-06-05 15:03:58,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:58,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:58,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:58,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:58,609 INFO L87 Difference]: Start difference. First operand 275266 states and 601515 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:00,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:00,101 INFO L93 Difference]: Finished difference Result 284381 states and 619091 transitions. [2021-06-05 15:04:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:04:00,102 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 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 96 [2021-06-05 15:04:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:00,429 INFO L225 Difference]: With dead ends: 284381 [2021-06-05 15:04:00,429 INFO L226 Difference]: Without dead ends: 284315 [2021-06-05 15:04:00,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:04:00,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284315 states. [2021-06-05 15:04:04,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284315 to 279242. [2021-06-05 15:04:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279242 states, 279241 states have (on average 2.1870821261920708) internal successors, (610723), 279241 states have internal predecessors, (610723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279242 states to 279242 states and 610723 transitions. [2021-06-05 15:04:05,365 INFO L78 Accepts]: Start accepts. Automaton has 279242 states and 610723 transitions. Word has length 96 [2021-06-05 15:04:05,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:05,365 INFO L482 AbstractCegarLoop]: Abstraction has 279242 states and 610723 transitions. [2021-06-05 15:04:05,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 279242 states and 610723 transitions. [2021-06-05 15:04:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:04:05,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:05,567 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:05,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 15:04:05,767 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:05,768 INFO L82 PathProgramCache]: Analyzing trace with hash 194774565, now seen corresponding path program 145 times [2021-06-05 15:04:05,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:05,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949092316] [2021-06-05 15:04:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 188 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:04:05,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:05,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949092316] [2021-06-05 15:04:05,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949092316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:05,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847903186] [2021-06-05 15:04:05,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:05,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:04:05,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 188 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:04:05,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847903186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:05,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:05,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:04:05,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895458251] [2021-06-05 15:04:05,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:04:05,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:05,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:04:05,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:05,963 INFO L87 Difference]: Start difference. First operand 279242 states and 610723 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:07,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:07,885 INFO L93 Difference]: Finished difference Result 298839 states and 651898 transitions. [2021-06-05 15:04:07,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:04:07,886 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 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 96 [2021-06-05 15:04:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:08,421 INFO L225 Difference]: With dead ends: 298839 [2021-06-05 15:04:08,421 INFO L226 Difference]: Without dead ends: 298803 [2021-06-05 15:04:08,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:04:08,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298803 states. [2021-06-05 15:04:12,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298803 to 280042. [2021-06-05 15:04:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280042 states, 280041 states have (on average 2.1865476840891156) internal successors, (612323), 280041 states have internal predecessors, (612323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:13,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280042 states to 280042 states and 612323 transitions. [2021-06-05 15:04:13,536 INFO L78 Accepts]: Start accepts. Automaton has 280042 states and 612323 transitions. Word has length 96 [2021-06-05 15:04:13,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:13,536 INFO L482 AbstractCegarLoop]: Abstraction has 280042 states and 612323 transitions. [2021-06-05 15:04:13,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 280042 states and 612323 transitions. [2021-06-05 15:04:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:04:13,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:13,723 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:13,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 15:04:13,923 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:13,924 INFO L82 PathProgramCache]: Analyzing trace with hash -794721701, now seen corresponding path program 146 times [2021-06-05 15:04:13,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:13,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010078256] [2021-06-05 15:04:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 223 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:04:13,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:13,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010078256] [2021-06-05 15:04:13,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010078256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:13,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984199555] [2021-06-05 15:04:13,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:14,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:14,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:14,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:04:14,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 223 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:04:14,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984199555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:14,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:14,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:04:14,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127444585] [2021-06-05 15:04:14,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:04:14,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:14,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:04:14,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:14,123 INFO L87 Difference]: Start difference. First operand 280042 states and 612323 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:15,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:15,639 INFO L93 Difference]: Finished difference Result 294586 states and 641708 transitions. [2021-06-05 15:04:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:04:15,639 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:04:15,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:15,999 INFO L225 Difference]: With dead ends: 294586 [2021-06-05 15:04:15,999 INFO L226 Difference]: Without dead ends: 294544 [2021-06-05 15:04:15,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:04:16,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294544 states. [2021-06-05 15:04:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294544 to 284094. [2021-06-05 15:04:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284094 states, 284093 states have (on average 2.187280221617569) internal successors, (621391), 284093 states have internal predecessors, (621391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:20,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284094 states to 284094 states and 621391 transitions. [2021-06-05 15:04:20,951 INFO L78 Accepts]: Start accepts. Automaton has 284094 states and 621391 transitions. Word has length 96 [2021-06-05 15:04:20,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:20,951 INFO L482 AbstractCegarLoop]: Abstraction has 284094 states and 621391 transitions. [2021-06-05 15:04:20,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:20,952 INFO L276 IsEmpty]: Start isEmpty. Operand 284094 states and 621391 transitions. [2021-06-05 15:04:21,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:04:21,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:21,150 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:21,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 15:04:21,350 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:21,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:21,350 INFO L82 PathProgramCache]: Analyzing trace with hash -489996081, now seen corresponding path program 147 times [2021-06-05 15:04:21,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:21,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99994147] [2021-06-05 15:04:21,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 195 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:04:21,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:21,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99994147] [2021-06-05 15:04:21,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99994147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:21,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25808423] [2021-06-05 15:04:21,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:21,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 15:04:21,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:21,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:04:21,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 195 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:04:21,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25808423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:21,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:21,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:04:21,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895884052] [2021-06-05 15:04:21,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:04:21,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:21,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:04:21,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:21,585 INFO L87 Difference]: Start difference. First operand 284094 states and 621391 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:23,127 INFO L93 Difference]: Finished difference Result 301944 states and 656167 transitions. [2021-06-05 15:04:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:04:23,127 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:04:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:23,502 INFO L225 Difference]: With dead ends: 301944 [2021-06-05 15:04:23,502 INFO L226 Difference]: Without dead ends: 301944 [2021-06-05 15:04:23,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:04:23,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301944 states. [2021-06-05 15:04:27,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301944 to 284134. [2021-06-05 15:04:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284134 states, 284133 states have (on average 2.186831519042139) internal successors, (621351), 284133 states have internal predecessors, (621351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:28,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284134 states to 284134 states and 621351 transitions. [2021-06-05 15:04:28,581 INFO L78 Accepts]: Start accepts. Automaton has 284134 states and 621351 transitions. Word has length 96 [2021-06-05 15:04:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:28,581 INFO L482 AbstractCegarLoop]: Abstraction has 284134 states and 621351 transitions. [2021-06-05 15:04:28,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 284134 states and 621351 transitions. [2021-06-05 15:04:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:04:28,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:28,778 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:28,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 15:04:28,978 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:28,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:28,979 INFO L82 PathProgramCache]: Analyzing trace with hash -99792155, now seen corresponding path program 148 times [2021-06-05 15:04:28,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:28,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209577904] [2021-06-05 15:04:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 191 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:04:29,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:29,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209577904] [2021-06-05 15:04:29,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209577904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:29,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358335353] [2021-06-05 15:04:29,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:29,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:29,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:29,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:04:29,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 191 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:04:29,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358335353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:29,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:29,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 15:04:29,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311635780] [2021-06-05 15:04:29,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:04:29,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:29,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:04:29,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:04:29,206 INFO L87 Difference]: Start difference. First operand 284134 states and 621351 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:30,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:30,826 INFO L93 Difference]: Finished difference Result 329236 states and 714209 transitions. [2021-06-05 15:04:30,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:30,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:04:30,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:31,207 INFO L225 Difference]: With dead ends: 329236 [2021-06-05 15:04:31,207 INFO L226 Difference]: Without dead ends: 329236 [2021-06-05 15:04:31,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=231, Invalid=369, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:04:32,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329236 states. [2021-06-05 15:04:35,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329236 to 284210. [2021-06-05 15:04:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284210 states, 284209 states have (on average 2.1864367419750956) internal successors, (621405), 284209 states have internal predecessors, (621405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:36,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284210 states to 284210 states and 621405 transitions. [2021-06-05 15:04:36,194 INFO L78 Accepts]: Start accepts. Automaton has 284210 states and 621405 transitions. Word has length 96 [2021-06-05 15:04:36,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:36,194 INFO L482 AbstractCegarLoop]: Abstraction has 284210 states and 621405 transitions. [2021-06-05 15:04:36,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 284210 states and 621405 transitions. [2021-06-05 15:04:37,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:04:37,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:37,205 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:37,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:37,405 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:37,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:37,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1353072775, now seen corresponding path program 149 times [2021-06-05 15:04:37,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:37,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771831886] [2021-06-05 15:04:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 166 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:04:37,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:37,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771831886] [2021-06-05 15:04:37,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771831886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:37,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732850004] [2021-06-05 15:04:37,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:37,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 15:04:37,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:37,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:04:37,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 166 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:04:37,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732850004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:37,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:37,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 15:04:37,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689118715] [2021-06-05 15:04:37,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:04:37,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:37,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:04:37,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:04:37,624 INFO L87 Difference]: Start difference. First operand 284210 states and 621405 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:38,524 INFO L93 Difference]: Finished difference Result 319340 states and 693417 transitions. [2021-06-05 15:04:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:38,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:04:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:39,646 INFO L225 Difference]: With dead ends: 319340 [2021-06-05 15:04:39,646 INFO L226 Difference]: Without dead ends: 319340 [2021-06-05 15:04:39,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:04:39,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319340 states. [2021-06-05 15:04:42,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319340 to 284530. [2021-06-05 15:04:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284530 states, 284529 states have (on average 2.186227062970734) internal successors, (622045), 284529 states have internal predecessors, (622045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:44,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284530 states to 284530 states and 622045 transitions. [2021-06-05 15:04:44,483 INFO L78 Accepts]: Start accepts. Automaton has 284530 states and 622045 transitions. Word has length 96 [2021-06-05 15:04:44,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:44,483 INFO L482 AbstractCegarLoop]: Abstraction has 284530 states and 622045 transitions. [2021-06-05 15:04:44,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:44,483 INFO L276 IsEmpty]: Start isEmpty. Operand 284530 states and 622045 transitions. [2021-06-05 15:04:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:04:44,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:44,687 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:44,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:44,888 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:44,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:44,888 INFO L82 PathProgramCache]: Analyzing trace with hash -508398491, now seen corresponding path program 150 times [2021-06-05 15:04:44,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:44,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897818184] [2021-06-05 15:04:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:44,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:44,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897818184] [2021-06-05 15:04:44,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897818184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:44,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559109229] [2021-06-05 15:04:44,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:45,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 15:04:45,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:45,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:04:45,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:45,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559109229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:45,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:45,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 15:04:45,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490088468] [2021-06-05 15:04:45,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:04:45,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:45,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:04:45,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:04:45,129 INFO L87 Difference]: Start difference. First operand 284530 states and 622045 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:46,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:46,735 INFO L93 Difference]: Finished difference Result 297354 states and 649674 transitions. [2021-06-05 15:04:46,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:04:46,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:04:46,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:47,072 INFO L225 Difference]: With dead ends: 297354 [2021-06-05 15:04:47,072 INFO L226 Difference]: Without dead ends: 297354 [2021-06-05 15:04:47,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=249, Invalid=453, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:04:47,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297354 states. [2021-06-05 15:04:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297354 to 282646. [2021-06-05 15:04:50,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282646 states, 282645 states have (on average 2.186350368837234) internal successors, (617961), 282645 states have internal predecessors, (617961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282646 states to 282646 states and 617961 transitions. [2021-06-05 15:04:52,214 INFO L78 Accepts]: Start accepts. Automaton has 282646 states and 617961 transitions. Word has length 96 [2021-06-05 15:04:52,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:52,214 INFO L482 AbstractCegarLoop]: Abstraction has 282646 states and 617961 transitions. [2021-06-05 15:04:52,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:52,214 INFO L276 IsEmpty]: Start isEmpty. Operand 282646 states and 617961 transitions. [2021-06-05 15:04:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:04:52,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:52,495 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:52,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:52,709 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:52,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:52,709 INFO L82 PathProgramCache]: Analyzing trace with hash 343907052, now seen corresponding path program 151 times [2021-06-05 15:04:52,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:52,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784331276] [2021-06-05 15:04:52,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 141 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:52,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:52,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784331276] [2021-06-05 15:04:52,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784331276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:52,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641416166] [2021-06-05 15:04:52,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:52,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:04:52,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 201 proven. 83 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-06-05 15:04:52,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641416166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:52,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:52,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 14 [2021-06-05 15:04:52,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232926437] [2021-06-05 15:04:52,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:04:52,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:52,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:04:52,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:04:52,966 INFO L87 Difference]: Start difference. First operand 282646 states and 617961 transitions. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:54,849 INFO L93 Difference]: Finished difference Result 296638 states and 645293 transitions. [2021-06-05 15:04:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:54,885 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 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 96 [2021-06-05 15:04:54,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:55,441 INFO L225 Difference]: With dead ends: 296638 [2021-06-05 15:04:55,441 INFO L226 Difference]: Without dead ends: 296566 [2021-06-05 15:04:55,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:04:55,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296566 states. [2021-06-05 15:04:58,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296566 to 282646. [2021-06-05 15:04:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282646 states, 282645 states have (on average 2.1860107201613332) internal successors, (617865), 282645 states have internal predecessors, (617865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282646 states to 282646 states and 617865 transitions. [2021-06-05 15:05:00,391 INFO L78 Accepts]: Start accepts. Automaton has 282646 states and 617865 transitions. Word has length 96 [2021-06-05 15:05:00,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:00,391 INFO L482 AbstractCegarLoop]: Abstraction has 282646 states and 617865 transitions. [2021-06-05 15:05:00,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:00,391 INFO L276 IsEmpty]: Start isEmpty. Operand 282646 states and 617865 transitions. [2021-06-05 15:05:00,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:05:00,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:00,593 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:00,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:00,794 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:00,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:00,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1564912452, now seen corresponding path program 152 times [2021-06-05 15:05:00,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:00,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693226425] [2021-06-05 15:05:00,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 145 proven. 164 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-06-05 15:05:00,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:00,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693226425] [2021-06-05 15:05:00,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693226425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:00,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31320548] [2021-06-05 15:05:00,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:00,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:00,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:00,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:05:00,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 145 proven. 164 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-06-05 15:05:00,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31320548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:00,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:00,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 15:05:00,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579335312] [2021-06-05 15:05:00,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:05:00,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:00,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:05:00,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:05:00,996 INFO L87 Difference]: Start difference. First operand 282646 states and 617865 transitions. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:02,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:02,468 INFO L93 Difference]: Finished difference Result 298171 states and 649070 transitions. [2021-06-05 15:05:02,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:05:02,468 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 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 96 [2021-06-05 15:05:02,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:02,837 INFO L225 Difference]: With dead ends: 298171 [2021-06-05 15:05:02,838 INFO L226 Difference]: Without dead ends: 298171 [2021-06-05 15:05:02,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:05:03,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298171 states. [2021-06-05 15:05:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298171 to 282022. [2021-06-05 15:05:06,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282022 states, 282021 states have (on average 2.1855925622560024) internal successors, (616383), 282021 states have internal predecessors, (616383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282022 states to 282022 states and 616383 transitions. [2021-06-05 15:05:07,801 INFO L78 Accepts]: Start accepts. Automaton has 282022 states and 616383 transitions. Word has length 96 [2021-06-05 15:05:07,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:07,801 INFO L482 AbstractCegarLoop]: Abstraction has 282022 states and 616383 transitions. [2021-06-05 15:05:07,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:07,801 INFO L276 IsEmpty]: Start isEmpty. Operand 282022 states and 616383 transitions. [2021-06-05 15:05:08,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:05:08,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:08,003 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:08,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:08,204 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:08,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:08,204 INFO L82 PathProgramCache]: Analyzing trace with hash -64413626, now seen corresponding path program 153 times [2021-06-05 15:05:08,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:08,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683229605] [2021-06-05 15:05:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 124 proven. 183 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-06-05 15:05:08,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:08,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683229605] [2021-06-05 15:05:08,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683229605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:08,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176200090] [2021-06-05 15:05:08,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:08,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 15:05:08,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:08,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:05:08,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 6 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-06-05 15:05:08,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176200090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:08,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:08,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 22 [2021-06-05 15:05:08,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221729531] [2021-06-05 15:05:08,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:08,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:08,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:08,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:08,509 INFO L87 Difference]: Start difference. First operand 282022 states and 616383 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:12,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:12,412 INFO L93 Difference]: Finished difference Result 527818 states and 1143066 transitions. [2021-06-05 15:05:12,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-06-05 15:05:12,412 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 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 96 [2021-06-05 15:05:12,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:13,186 INFO L225 Difference]: With dead ends: 527818 [2021-06-05 15:05:13,186 INFO L226 Difference]: Without dead ends: 527644 [2021-06-05 15:05:13,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4599 ImplicationChecksByTransitivity, 1667.0ms TimeCoverageRelationStatistics Valid=1106, Invalid=12004, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 15:05:13,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527644 states. [2021-06-05 15:05:20,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527644 to 396232. [2021-06-05 15:05:20,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396232 states, 396231 states have (on average 2.1780552253609637) internal successors, (863013), 396231 states have internal predecessors, (863013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396232 states to 396232 states and 863013 transitions. [2021-06-05 15:05:21,426 INFO L78 Accepts]: Start accepts. Automaton has 396232 states and 863013 transitions. Word has length 96 [2021-06-05 15:05:21,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:21,426 INFO L482 AbstractCegarLoop]: Abstraction has 396232 states and 863013 transitions. [2021-06-05 15:05:21,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 396232 states and 863013 transitions. [2021-06-05 15:05:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:05:22,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:22,479 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:22,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:22,680 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:22,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:22,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1559341669, now seen corresponding path program 154 times [2021-06-05 15:05:22,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:22,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594416764] [2021-06-05 15:05:22,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 165 proven. 125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 15:05:22,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:22,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594416764] [2021-06-05 15:05:22,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594416764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:22,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017758529] [2021-06-05 15:05:22,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:22,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:22,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:22,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:05:22,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 165 proven. 125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 15:05:22,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017758529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:22,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:22,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:05:22,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791975723] [2021-06-05 15:05:22,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:05:22,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:22,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:05:22,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:05:22,879 INFO L87 Difference]: Start difference. First operand 396232 states and 863013 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:24,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:24,678 INFO L93 Difference]: Finished difference Result 407321 states and 884626 transitions. [2021-06-05 15:05:24,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:05:24,679 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 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 96 [2021-06-05 15:05:24,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:25,330 INFO L225 Difference]: With dead ends: 407321 [2021-06-05 15:05:25,330 INFO L226 Difference]: Without dead ends: 407255 [2021-06-05 15:05:25,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:05:25,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407255 states. [2021-06-05 15:05:30,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407255 to 401628. [2021-06-05 15:05:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401628 states, 401627 states have (on average 2.1796965841439944) internal successors, (875425), 401627 states have internal predecessors, (875425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:32,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401628 states to 401628 states and 875425 transitions. [2021-06-05 15:05:32,192 INFO L78 Accepts]: Start accepts. Automaton has 401628 states and 875425 transitions. Word has length 96 [2021-06-05 15:05:32,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:32,192 INFO L482 AbstractCegarLoop]: Abstraction has 401628 states and 875425 transitions. [2021-06-05 15:05:32,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:32,192 INFO L276 IsEmpty]: Start isEmpty. Operand 401628 states and 875425 transitions. [2021-06-05 15:05:33,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:05:33,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:33,260 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:33,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:33,477 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash 408916935, now seen corresponding path program 155 times [2021-06-05 15:05:33,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:33,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532382029] [2021-06-05 15:05:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 198 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:05:33,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:33,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532382029] [2021-06-05 15:05:33,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532382029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:33,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840205880] [2021-06-05 15:05:33,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:33,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 15:05:33,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:33,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:05:33,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 198 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:05:33,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840205880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:33,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:33,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:05:33,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414856097] [2021-06-05 15:05:33,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:05:33,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:33,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:05:33,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:05:33,680 INFO L87 Difference]: Start difference. First operand 401628 states and 875425 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:35,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:35,769 INFO L93 Difference]: Finished difference Result 427365 states and 929947 transitions. [2021-06-05 15:05:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:05:35,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 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 96 [2021-06-05 15:05:35,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:36,741 INFO L225 Difference]: With dead ends: 427365 [2021-06-05 15:05:36,741 INFO L226 Difference]: Without dead ends: 427293 [2021-06-05 15:05:36,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:05:37,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427293 states. [2021-06-05 15:05:42,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427293 to 403688. [2021-06-05 15:05:43,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403688 states, 403687 states have (on average 2.1797308310646617) internal successors, (879929), 403687 states have internal predecessors, (879929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403688 states to 403688 states and 879929 transitions. [2021-06-05 15:05:44,760 INFO L78 Accepts]: Start accepts. Automaton has 403688 states and 879929 transitions. Word has length 96 [2021-06-05 15:05:44,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:44,760 INFO L482 AbstractCegarLoop]: Abstraction has 403688 states and 879929 transitions. [2021-06-05 15:05:44,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:44,760 INFO L276 IsEmpty]: Start isEmpty. Operand 403688 states and 879929 transitions. [2021-06-05 15:05:45,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:05:45,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:45,030 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:45,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 15:05:45,231 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:45,231 INFO L82 PathProgramCache]: Analyzing trace with hash -7602597, now seen corresponding path program 156 times [2021-06-05 15:05:45,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:45,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055405262] [2021-06-05 15:05:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 233 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:05:45,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:45,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055405262] [2021-06-05 15:05:45,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055405262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:45,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517519647] [2021-06-05 15:05:45,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:45,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 15:05:45,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:45,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:05:45,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 233 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:05:45,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517519647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:45,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:45,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:05:45,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833931389] [2021-06-05 15:05:45,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:05:45,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:45,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:05:45,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:05:45,436 INFO L87 Difference]: Start difference. First operand 403688 states and 879929 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:47,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:47,444 INFO L93 Difference]: Finished difference Result 425634 states and 925391 transitions. [2021-06-05 15:05:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:05:47,445 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:05:47,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:48,030 INFO L225 Difference]: With dead ends: 425634 [2021-06-05 15:05:48,030 INFO L226 Difference]: Without dead ends: 425592 [2021-06-05 15:05:48,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:05:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425592 states. [2021-06-05 15:05:53,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425592 to 412428. [2021-06-05 15:05:54,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412428 states, 412427 states have (on average 2.1807131928801944) internal successors, (899385), 412427 states have internal predecessors, (899385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412428 states to 412428 states and 899385 transitions. [2021-06-05 15:05:55,497 INFO L78 Accepts]: Start accepts. Automaton has 412428 states and 899385 transitions. Word has length 96 [2021-06-05 15:05:55,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:55,497 INFO L482 AbstractCegarLoop]: Abstraction has 412428 states and 899385 transitions. [2021-06-05 15:05:55,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:55,497 INFO L276 IsEmpty]: Start isEmpty. Operand 412428 states and 899385 transitions. [2021-06-05 15:05:55,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:05:55,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:55,753 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:55,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 15:05:55,965 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:55,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:55,965 INFO L82 PathProgramCache]: Analyzing trace with hash 297123023, now seen corresponding path program 157 times [2021-06-05 15:05:55,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:55,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336740470] [2021-06-05 15:05:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:05:56,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:56,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336740470] [2021-06-05 15:05:56,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336740470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:56,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755181332] [2021-06-05 15:05:56,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:56,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:05:56,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:05:56,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755181332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:56,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:56,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:05:56,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378062797] [2021-06-05 15:05:56,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:05:56,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:56,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:05:56,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:05:56,190 INFO L87 Difference]: Start difference. First operand 412428 states and 899385 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:58,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:58,150 INFO L93 Difference]: Finished difference Result 439240 states and 953108 transitions. [2021-06-05 15:05:58,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:05:58,150 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:05:58,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:58,761 INFO L225 Difference]: With dead ends: 439240 [2021-06-05 15:05:58,761 INFO L226 Difference]: Without dead ends: 439240 [2021-06-05 15:05:58,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:05:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439240 states. [2021-06-05 15:06:04,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439240 to 412684. [2021-06-05 15:06:05,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412684 states, 412683 states have (on average 2.1804266228557996) internal successors, (899825), 412683 states have internal predecessors, (899825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:07,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412684 states to 412684 states and 899825 transitions. [2021-06-05 15:06:07,028 INFO L78 Accepts]: Start accepts. Automaton has 412684 states and 899825 transitions. Word has length 96 [2021-06-05 15:06:07,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:07,028 INFO L482 AbstractCegarLoop]: Abstraction has 412684 states and 899825 transitions. [2021-06-05 15:06:07,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 412684 states and 899825 transitions. [2021-06-05 15:06:07,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:06:07,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:07,328 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:07,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 15:06:07,528 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:07,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:07,528 INFO L82 PathProgramCache]: Analyzing trace with hash 687326949, now seen corresponding path program 158 times [2021-06-05 15:06:07,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:07,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660912333] [2021-06-05 15:06:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 202 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:06:07,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:07,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660912333] [2021-06-05 15:06:07,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660912333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:07,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020328168] [2021-06-05 15:06:07,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:07,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:07,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:07,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:06:07,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 202 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:06:07,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020328168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:07,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:07,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 15:06:07,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746001506] [2021-06-05 15:06:07,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:06:07,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:07,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:06:07,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:06:07,736 INFO L87 Difference]: Start difference. First operand 412684 states and 899825 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:09,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:09,678 INFO L93 Difference]: Finished difference Result 495432 states and 1073586 transitions. [2021-06-05 15:06:09,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:06:09,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:06:09,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:10,328 INFO L225 Difference]: With dead ends: 495432 [2021-06-05 15:06:10,328 INFO L226 Difference]: Without dead ends: 495432 [2021-06-05 15:06:10,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=250, Invalid=400, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:06:10,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495432 states. [2021-06-05 15:06:16,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495432 to 413220. [2021-06-05 15:06:16,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413220 states, 413219 states have (on average 2.1798634622318915) internal successors, (900761), 413219 states have internal predecessors, (900761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:17,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413220 states to 413220 states and 900761 transitions. [2021-06-05 15:06:17,862 INFO L78 Accepts]: Start accepts. Automaton has 413220 states and 900761 transitions. Word has length 96 [2021-06-05 15:06:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:17,862 INFO L482 AbstractCegarLoop]: Abstraction has 413220 states and 900761 transitions. [2021-06-05 15:06:17,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 413220 states and 900761 transitions. [2021-06-05 15:06:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:06:19,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:19,222 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:19,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:19,445 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:19,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2140191879, now seen corresponding path program 159 times [2021-06-05 15:06:19,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:19,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720070595] [2021-06-05 15:06:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 182 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:06:19,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:19,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720070595] [2021-06-05 15:06:19,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720070595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:19,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551646675] [2021-06-05 15:06:19,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:19,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 15:06:19,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:19,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:06:19,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 182 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:06:19,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551646675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:19,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:19,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 15:06:19,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609680907] [2021-06-05 15:06:19,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:06:19,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:19,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:06:19,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:06:19,722 INFO L87 Difference]: Start difference. First operand 413220 states and 900761 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:22,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:22,562 INFO L93 Difference]: Finished difference Result 497004 states and 1077768 transitions. [2021-06-05 15:06:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:06:22,562 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:06:22,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:23,819 INFO L225 Difference]: With dead ends: 497004 [2021-06-05 15:06:23,819 INFO L226 Difference]: Without dead ends: 497004 [2021-06-05 15:06:23,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=307, Invalid=505, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:06:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497004 states. [2021-06-05 15:06:30,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497004 to 413420. [2021-06-05 15:06:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413420 states, 413419 states have (on average 2.179457160894879) internal successors, (901029), 413419 states have internal predecessors, (901029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:31,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413420 states to 413420 states and 901029 transitions. [2021-06-05 15:06:31,885 INFO L78 Accepts]: Start accepts. Automaton has 413420 states and 901029 transitions. Word has length 96 [2021-06-05 15:06:31,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:31,885 INFO L482 AbstractCegarLoop]: Abstraction has 413420 states and 901029 transitions. [2021-06-05 15:06:31,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 413420 states and 901029 transitions. [2021-06-05 15:06:32,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:06:32,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:32,911 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:33,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 15:06:33,112 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:33,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:33,112 INFO L82 PathProgramCache]: Analyzing trace with hash 278720613, now seen corresponding path program 160 times [2021-06-05 15:06:33,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:33,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798156319] [2021-06-05 15:06:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 161 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:06:33,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:33,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798156319] [2021-06-05 15:06:33,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798156319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:33,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774300931] [2021-06-05 15:06:33,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:33,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:33,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:33,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:06:33,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 161 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:06:33,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774300931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:33,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:33,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 15:06:33,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512482440] [2021-06-05 15:06:33,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:06:33,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:33,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:06:33,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:06:33,333 INFO L87 Difference]: Start difference. First operand 413420 states and 901029 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:35,332 INFO L93 Difference]: Finished difference Result 465380 states and 1009820 transitions. [2021-06-05 15:06:35,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:06:35,332 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:06:35,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:36,037 INFO L225 Difference]: With dead ends: 465380 [2021-06-05 15:06:36,038 INFO L226 Difference]: Without dead ends: 465380 [2021-06-05 15:06:36,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 179.7ms TimeCoverageRelationStatistics Valid=321, Invalid=549, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:06:36,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465380 states. [2021-06-05 15:06:42,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465380 to 414060. [2021-06-05 15:06:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414060 states, 414059 states have (on average 2.1791797787271863) internal successors, (902309), 414059 states have internal predecessors, (902309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:43,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414060 states to 414060 states and 902309 transitions. [2021-06-05 15:06:43,716 INFO L78 Accepts]: Start accepts. Automaton has 414060 states and 902309 transitions. Word has length 96 [2021-06-05 15:06:43,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:43,716 INFO L482 AbstractCegarLoop]: Abstraction has 414060 states and 902309 transitions. [2021-06-05 15:06:43,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:43,716 INFO L276 IsEmpty]: Start isEmpty. Operand 414060 states and 902309 transitions. [2021-06-05 15:06:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:06:43,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:43,952 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:44,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:44,153 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:44,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:44,153 INFO L82 PathProgramCache]: Analyzing trace with hash 553698183, now seen corresponding path program 161 times [2021-06-05 15:06:44,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:44,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180355855] [2021-06-05 15:06:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:44,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:44,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180355855] [2021-06-05 15:06:44,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180355855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:44,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899528034] [2021-06-05 15:06:44,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:44,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 15:06:44,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:44,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:06:44,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:44,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899528034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:44,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:44,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 15:06:44,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841513980] [2021-06-05 15:06:44,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:06:44,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:44,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:06:44,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:06:44,391 INFO L87 Difference]: Start difference. First operand 414060 states and 902309 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:46,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:46,412 INFO L93 Difference]: Finished difference Result 430906 states and 940689 transitions. [2021-06-05 15:06:46,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:06:46,412 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:06:46,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:47,634 INFO L225 Difference]: With dead ends: 430906 [2021-06-05 15:06:47,634 INFO L226 Difference]: Without dead ends: 430906 [2021-06-05 15:06:47,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=283, Invalid=529, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:06:47,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430906 states. [2021-06-05 15:06:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430906 to 401228. [2021-06-05 15:06:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401228 states, 401227 states have (on average 2.1776525508004196) internal successors, (873733), 401227 states have internal predecessors, (873733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401228 states to 401228 states and 873733 transitions. [2021-06-05 15:06:55,142 INFO L78 Accepts]: Start accepts. Automaton has 401228 states and 873733 transitions. Word has length 96 [2021-06-05 15:06:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:55,142 INFO L482 AbstractCegarLoop]: Abstraction has 401228 states and 873733 transitions. [2021-06-05 15:06:55,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 401228 states and 873733 transitions. [2021-06-05 15:06:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:06:55,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:55,394 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:55,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:55,595 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:55,595 INFO L82 PathProgramCache]: Analyzing trace with hash 449615781, now seen corresponding path program 162 times [2021-06-05 15:06:55,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:55,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023244178] [2021-06-05 15:06:55,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 200 proven. 96 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:06:55,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:55,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023244178] [2021-06-05 15:06:55,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023244178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:55,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096554428] [2021-06-05 15:06:55,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:55,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 15:06:55,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:55,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:06:55,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 200 proven. 96 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:06:55,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096554428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:55,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:55,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:06:55,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540214817] [2021-06-05 15:06:55,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:06:55,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:55,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:06:55,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:06:55,794 INFO L87 Difference]: Start difference. First operand 401228 states and 873733 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:57,912 INFO L93 Difference]: Finished difference Result 424850 states and 924011 transitions. [2021-06-05 15:06:57,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:06:57,912 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 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 96 [2021-06-05 15:06:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:58,826 INFO L225 Difference]: With dead ends: 424850 [2021-06-05 15:06:58,827 INFO L226 Difference]: Without dead ends: 424778 [2021-06-05 15:06:58,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:06:59,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424778 states. [2021-06-05 15:07:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424778 to 401892. [2021-06-05 15:07:05,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401892 states, 401891 states have (on average 2.1778666354807648) internal successors, (875265), 401891 states have internal predecessors, (875265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:07,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401892 states to 401892 states and 875265 transitions. [2021-06-05 15:07:07,006 INFO L78 Accepts]: Start accepts. Automaton has 401892 states and 875265 transitions. Word has length 96 [2021-06-05 15:07:07,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:07,006 INFO L482 AbstractCegarLoop]: Abstraction has 401892 states and 875265 transitions. [2021-06-05 15:07:07,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 401892 states and 875265 transitions. [2021-06-05 15:07:07,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:07:07,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:07,229 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:07,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:07,430 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:07,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:07,430 INFO L82 PathProgramCache]: Analyzing trace with hash -198417829, now seen corresponding path program 163 times [2021-06-05 15:07:07,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:07,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612062859] [2021-06-05 15:07:07,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 235 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:07:07,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:07,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612062859] [2021-06-05 15:07:07,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612062859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:07,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051725139] [2021-06-05 15:07:07,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:07,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:07:07,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 235 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:07:07,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051725139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:07,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:07,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:07:07,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649037308] [2021-06-05 15:07:07,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:07:07,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:07,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:07:07,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:07:07,640 INFO L87 Difference]: Start difference. First operand 401892 states and 875265 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:09,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:09,609 INFO L93 Difference]: Finished difference Result 419176 states and 910606 transitions. [2021-06-05 15:07:09,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:07:09,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:07:09,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:10,159 INFO L225 Difference]: With dead ends: 419176 [2021-06-05 15:07:10,159 INFO L226 Difference]: Without dead ends: 419134 [2021-06-05 15:07:10,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:07:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419134 states. [2021-06-05 15:07:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419134 to 407336. [2021-06-05 15:07:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407336 states, 407335 states have (on average 2.1785532792419016) internal successors, (887401), 407335 states have internal predecessors, (887401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407336 states to 407336 states and 887401 transitions. [2021-06-05 15:07:17,466 INFO L78 Accepts]: Start accepts. Automaton has 407336 states and 887401 transitions. Word has length 96 [2021-06-05 15:07:17,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:17,467 INFO L482 AbstractCegarLoop]: Abstraction has 407336 states and 887401 transitions. [2021-06-05 15:07:17,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:17,467 INFO L276 IsEmpty]: Start isEmpty. Operand 407336 states and 887401 transitions. [2021-06-05 15:07:17,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:07:17,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:17,654 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:17,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-05 15:07:17,854 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:17,855 INFO L82 PathProgramCache]: Analyzing trace with hash 106307791, now seen corresponding path program 164 times [2021-06-05 15:07:17,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:17,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424214261] [2021-06-05 15:07:17,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 207 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:07:17,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:17,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424214261] [2021-06-05 15:07:17,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424214261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:17,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94961034] [2021-06-05 15:07:17,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:17,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:17,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:17,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:07:17,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 207 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:07:18,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94961034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:18,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:18,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:07:18,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170184279] [2021-06-05 15:07:18,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:07:18,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:18,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:07:18,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:07:18,085 INFO L87 Difference]: Start difference. First operand 407336 states and 887401 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:19,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:19,900 INFO L93 Difference]: Finished difference Result 432146 states and 937019 transitions. [2021-06-05 15:07:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:07:19,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:07:19,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:20,482 INFO L225 Difference]: With dead ends: 432146 [2021-06-05 15:07:20,482 INFO L226 Difference]: Without dead ends: 432146 [2021-06-05 15:07:20,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:07:21,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432146 states. [2021-06-05 15:07:26,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432146 to 407536. [2021-06-05 15:07:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407536 states, 407535 states have (on average 2.178485283472585) internal successors, (887809), 407535 states have internal predecessors, (887809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:27,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407536 states to 407536 states and 887809 transitions. [2021-06-05 15:07:27,974 INFO L78 Accepts]: Start accepts. Automaton has 407536 states and 887809 transitions. Word has length 96 [2021-06-05 15:07:27,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:27,974 INFO L482 AbstractCegarLoop]: Abstraction has 407536 states and 887809 transitions. [2021-06-05 15:07:27,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:27,975 INFO L276 IsEmpty]: Start isEmpty. Operand 407536 states and 887809 transitions. [2021-06-05 15:07:28,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:07:28,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:28,169 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:28,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:28,370 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:28,370 INFO L82 PathProgramCache]: Analyzing trace with hash 496511717, now seen corresponding path program 165 times [2021-06-05 15:07:28,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:28,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579461159] [2021-06-05 15:07:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:07:28,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:28,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579461159] [2021-06-05 15:07:28,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579461159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:28,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464544461] [2021-06-05 15:07:28,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:28,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 15:07:28,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:28,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:07:28,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:07:28,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464544461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:28,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:28,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 15:07:28,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572750403] [2021-06-05 15:07:28,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:07:28,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:28,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:07:28,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:07:28,593 INFO L87 Difference]: Start difference. First operand 407536 states and 887809 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:30,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:30,617 INFO L93 Difference]: Finished difference Result 488982 states and 1058761 transitions. [2021-06-05 15:07:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:07:30,617 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:07:30,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:31,877 INFO L225 Difference]: With dead ends: 488982 [2021-06-05 15:07:31,877 INFO L226 Difference]: Without dead ends: 488982 [2021-06-05 15:07:31,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=268, Invalid=434, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:07:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488982 states. [2021-06-05 15:07:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488982 to 408416. [2021-06-05 15:07:37,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408416 states, 408415 states have (on average 2.178090912429759) internal successors, (889565), 408415 states have internal predecessors, (889565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408416 states to 408416 states and 889565 transitions. [2021-06-05 15:07:39,871 INFO L78 Accepts]: Start accepts. Automaton has 408416 states and 889565 transitions. Word has length 96 [2021-06-05 15:07:39,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:39,872 INFO L482 AbstractCegarLoop]: Abstraction has 408416 states and 889565 transitions. [2021-06-05 15:07:39,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 408416 states and 889565 transitions. [2021-06-05 15:07:40,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:07:40,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:40,184 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:40,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 15:07:40,405 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:40,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:40,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1949376647, now seen corresponding path program 166 times [2021-06-05 15:07:40,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:40,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504709787] [2021-06-05 15:07:40,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 189 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:07:40,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:40,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504709787] [2021-06-05 15:07:40,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504709787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:40,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945571625] [2021-06-05 15:07:40,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:40,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:40,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:40,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:07:40,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 189 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:07:40,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945571625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:40,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:40,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 15:07:40,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406855677] [2021-06-05 15:07:40,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:07:40,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:40,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:07:40,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:07:40,668 INFO L87 Difference]: Start difference. First operand 408416 states and 889565 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:43,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:43,160 INFO L93 Difference]: Finished difference Result 500230 states and 1083955 transitions. [2021-06-05 15:07:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:07:43,161 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:07:43,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:44,288 INFO L225 Difference]: With dead ends: 500230 [2021-06-05 15:07:44,288 INFO L226 Difference]: Without dead ends: 500230 [2021-06-05 15:07:44,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=350, Invalid=580, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:07:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500230 states. [2021-06-05 15:07:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500230 to 409316. [2021-06-05 15:07:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409316 states, 409315 states have (on average 2.177748189047555) internal successors, (891385), 409315 states have internal predecessors, (891385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:52,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409316 states to 409316 states and 891385 transitions. [2021-06-05 15:07:52,655 INFO L78 Accepts]: Start accepts. Automaton has 409316 states and 891385 transitions. Word has length 96 [2021-06-05 15:07:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:52,655 INFO L482 AbstractCegarLoop]: Abstraction has 409316 states and 891385 transitions. [2021-06-05 15:07:52,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 409316 states and 891385 transitions. [2021-06-05 15:07:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:07:52,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:52,865 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:53,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 15:07:53,069 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash 87905381, now seen corresponding path program 167 times [2021-06-05 15:07:53,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:53,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272208566] [2021-06-05 15:07:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 173 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:07:53,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:53,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272208566] [2021-06-05 15:07:53,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272208566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:53,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518039825] [2021-06-05 15:07:53,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:53,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 15:07:53,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:53,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:07:53,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 173 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:07:54,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518039825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:54,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:54,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 15:07:54,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428471849] [2021-06-05 15:07:54,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:07:54,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:54,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:07:54,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:07:54,129 INFO L87 Difference]: Start difference. First operand 409316 states and 891385 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:56,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:56,150 INFO L93 Difference]: Finished difference Result 484574 states and 1051121 transitions. [2021-06-05 15:07:56,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:07:56,151 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:07:56,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:56,904 INFO L225 Difference]: With dead ends: 484574 [2021-06-05 15:07:56,904 INFO L226 Difference]: Without dead ends: 484574 [2021-06-05 15:07:56,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:07:57,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484574 states. [2021-06-05 15:08:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484574 to 409896. [2021-06-05 15:08:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409896 states, 409895 states have (on average 2.1773405384305735) internal successors, (892481), 409895 states have internal predecessors, (892481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409896 states to 409896 states and 892481 transitions. [2021-06-05 15:08:04,570 INFO L78 Accepts]: Start accepts. Automaton has 409896 states and 892481 transitions. Word has length 96 [2021-06-05 15:08:04,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:04,570 INFO L482 AbstractCegarLoop]: Abstraction has 409896 states and 892481 transitions. [2021-06-05 15:08:04,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:04,570 INFO L276 IsEmpty]: Start isEmpty. Operand 409896 states and 892481 transitions. [2021-06-05 15:08:04,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:08:04,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:04,815 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:05,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 15:08:05,015 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:05,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:05,016 INFO L82 PathProgramCache]: Analyzing trace with hash 362882951, now seen corresponding path program 168 times [2021-06-05 15:08:05,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:05,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102456381] [2021-06-05 15:08:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 157 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:08:05,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:05,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102456381] [2021-06-05 15:08:05,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102456381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:05,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068786068] [2021-06-05 15:08:05,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:05,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 15:08:05,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:05,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:08:05,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 157 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:08:05,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068786068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:05,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:05,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 15:08:05,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441161947] [2021-06-05 15:08:05,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:08:05,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:05,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:08:05,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:08:05,254 INFO L87 Difference]: Start difference. First operand 409896 states and 892481 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:07,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:07,288 INFO L93 Difference]: Finished difference Result 452934 states and 982423 transitions. [2021-06-05 15:08:07,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:08:07,289 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:08:07,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:07,898 INFO L225 Difference]: With dead ends: 452934 [2021-06-05 15:08:07,899 INFO L226 Difference]: Without dead ends: 452934 [2021-06-05 15:08:07,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=385, Invalid=671, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:08:08,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452934 states. [2021-06-05 15:08:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452934 to 410776. [2021-06-05 15:08:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410776 states, 410775 states have (on average 2.1769606232122207) internal successors, (894241), 410775 states have internal predecessors, (894241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:15,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410776 states to 410776 states and 894241 transitions. [2021-06-05 15:08:15,410 INFO L78 Accepts]: Start accepts. Automaton has 410776 states and 894241 transitions. Word has length 96 [2021-06-05 15:08:15,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:15,410 INFO L482 AbstractCegarLoop]: Abstraction has 410776 states and 894241 transitions. [2021-06-05 15:08:15,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:15,410 INFO L276 IsEmpty]: Start isEmpty. Operand 410776 states and 894241 transitions. [2021-06-05 15:08:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:08:16,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:16,684 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:16,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 15:08:16,897 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:16,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:16,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1973198309, now seen corresponding path program 169 times [2021-06-05 15:08:16,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:16,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010279568] [2021-06-05 15:08:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:17,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:17,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010279568] [2021-06-05 15:08:17,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010279568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:17,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735538431] [2021-06-05 15:08:17,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:17,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:08:17,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:17,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735538431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:17,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:17,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 15:08:17,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218958246] [2021-06-05 15:08:17,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:08:17,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:17,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:08:17,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:08:17,192 INFO L87 Difference]: Start difference. First operand 410776 states and 894241 transitions. Second operand has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:19,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:19,003 INFO L93 Difference]: Finished difference Result 425560 states and 927070 transitions. [2021-06-05 15:08:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:08:19,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-06-05 15:08:19,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:20,269 INFO L225 Difference]: With dead ends: 425560 [2021-06-05 15:08:20,270 INFO L226 Difference]: Without dead ends: 425560 [2021-06-05 15:08:20,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:08:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425560 states. [2021-06-05 15:08:26,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425560 to 404836. [2021-06-05 15:08:26,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404836 states, 404835 states have (on average 2.178163943334939) internal successors, (881797), 404835 states have internal predecessors, (881797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:27,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404836 states to 404836 states and 881797 transitions. [2021-06-05 15:08:27,534 INFO L78 Accepts]: Start accepts. Automaton has 404836 states and 881797 transitions. Word has length 96 [2021-06-05 15:08:27,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:27,534 INFO L482 AbstractCegarLoop]: Abstraction has 404836 states and 881797 transitions. [2021-06-05 15:08:27,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:27,534 INFO L276 IsEmpty]: Start isEmpty. Operand 404836 states and 881797 transitions. [2021-06-05 15:08:28,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:08:28,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:28,555 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:28,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:28,769 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:28,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:28,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2072034489, now seen corresponding path program 170 times [2021-06-05 15:08:28,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:28,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548595315] [2021-06-05 15:08:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 113 proven. 177 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 15:08:28,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:28,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548595315] [2021-06-05 15:08:28,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548595315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:28,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917631272] [2021-06-05 15:08:28,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:28,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:28,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:28,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:08:28,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 113 proven. 177 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 15:08:28,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917631272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:28,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:28,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 15:08:28,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597721172] [2021-06-05 15:08:28,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:08:28,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:28,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:08:28,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:08:28,993 INFO L87 Difference]: Start difference. First operand 404836 states and 881797 transitions. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:30,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:30,852 INFO L93 Difference]: Finished difference Result 422860 states and 919321 transitions. [2021-06-05 15:08:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:08:30,853 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 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 96 [2021-06-05 15:08:30,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:31,504 INFO L225 Difference]: With dead ends: 422860 [2021-06-05 15:08:31,504 INFO L226 Difference]: Without dead ends: 422704 [2021-06-05 15:08:31,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:08:31,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422704 states. Received shutdown request... [2021-06-05 15:08:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422704 to 408288. [2021-06-05 15:08:37,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408288 states, 408287 states have (on average 2.179890616159711) internal successors, (890021), 408287 states have internal predecessors, (890021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:37,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 15:08:37,580 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 15:08:37,581 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:08:37,583 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 15:08:37,583 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:08:37 BasicIcfg [2021-06-05 15:08:37,583 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:08:37,584 INFO L168 Benchmark]: Toolchain (without parser) took 649994.66 ms. Allocated memory was 373.3 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 352.8 MB in the beginning and 10.7 GB in the end (delta: -10.3 GB). Peak memory consumption was 5.8 GB. Max. memory is 16.0 GB. [2021-06-05 15:08:37,584 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 373.3 MB. Free memory was 354.0 MB in the beginning and 353.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:08:37,584 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.66 ms. Allocated memory is still 373.3 MB. Free memory was 352.8 MB in the beginning and 351.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:08:37,584 INFO L168 Benchmark]: Boogie Preprocessor took 23.36 ms. Allocated memory is still 373.3 MB. Free memory was 351.4 MB in the beginning and 350.4 MB in the end (delta: 980.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:08:37,584 INFO L168 Benchmark]: RCFGBuilder took 362.57 ms. Allocated memory is still 373.3 MB. Free memory was 350.3 MB in the beginning and 339.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 15:08:37,584 INFO L168 Benchmark]: TraceAbstraction took 649535.98 ms. Allocated memory was 373.3 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 339.0 MB in the beginning and 10.7 GB in the end (delta: -10.3 GB). Peak memory consumption was 5.8 GB. Max. memory is 16.0 GB. [2021-06-05 15:08:37,585 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 373.3 MB. Free memory was 354.0 MB in the beginning and 353.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 51.66 ms. Allocated memory is still 373.3 MB. Free memory was 352.8 MB in the beginning and 351.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 23.36 ms. Allocated memory is still 373.3 MB. Free memory was 351.4 MB in the beginning and 350.4 MB in the end (delta: 980.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 362.57 ms. Allocated memory is still 373.3 MB. Free memory was 350.3 MB in the beginning and 339.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 649535.98 ms. Allocated memory was 373.3 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 339.0 MB in the beginning and 10.7 GB in the end (delta: -10.3 GB). Peak memory consumption was 5.8 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 44 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 649396.8ms, OverallIterations: 183, TraceHistogramMax: 11, EmptinessCheckTime: 23493.8ms, AutomataDifference: 164298.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14079 SDtfs, 46915 SDslu, 60753 SDs, 0 SdLazy, 28227 SolverSat, 4873 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14890.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15604 GetRequests, 12236 SyntacticMatches, 100 SemanticMatches, 3268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27685 ImplicationChecksByTransitivity, 21646.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=414060occurred in iteration=173, InterpolantAutomatonStates: 3222, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 389137.4ms AutomataMinimizationTime, 183 MinimizatonAttempts, 2017144 StatesRemovedByMinimization, 182 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 780.4ms SsaConstructionTime, 3739.9ms SatisfiabilityAnalysisTime, 27431.3ms InterpolantComputationTime, 23560 NumberOfCodeBlocks, 23494 NumberOfCodeBlocksAsserted, 979 NumberOfCheckSat, 23200 ConstructedInterpolants, 0 QuantifiedInterpolants, 103267 SizeOfPredicates, 356 NumberOfNonLiveVariables, 18192 ConjunctsInSsa, 2523 ConjunctsInUnsatCore, 360 InterpolantComputations, 6 PerfectInterpolantSequences, 27618/51246 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown