/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 21:07:47,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 21:07:47,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 21:07:47,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 21:07:47,103 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-21 21:07:47,130 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 21:07:47,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 21:07:47,130 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 21:07:47,131 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 21:07:47,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 21:07:47,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 21:07:47,132 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 21:07:47,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 21:07:47,133 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 21:07:47,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 21:07:47,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 21:07:47,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 21:07:47,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 21:07:47,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 21:07:47,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 21:07:47,134 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 21:07:47,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 21:07:47,134 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 21:07:47,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 21:07:47,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 21:07:47,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 21:07:47,135 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 21:07:47,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 21:07:47,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:07:47,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 21:07:47,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 21:07:47,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 21:07:47,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 21:07:47,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 21:07:47,135 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 21:07:47,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 21:07:47,136 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 21:07:47,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 21:07:47,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 21:07:47,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 21:07:47,411 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 21:07:47,412 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 21:07:47,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl [2021-05-21 21:07:47,412 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl' [2021-05-21 21:07:47,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 21:07:47,445 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 21:07:47,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 21:07:47,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 21:07:47,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 21:07:47,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:47" (1/1) ... [2021-05-21 21:07:47,458 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:47" (1/1) ... [2021-05-21 21:07:47,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 21:07:47,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 21:07:47,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 21:07:47,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 21:07:47,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:47" (1/1) ... [2021-05-21 21:07:47,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:47" (1/1) ... [2021-05-21 21:07:47,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:47" (1/1) ... [2021-05-21 21:07:47,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:47" (1/1) ... [2021-05-21 21:07:47,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:47" (1/1) ... [2021-05-21 21:07:47,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:47" (1/1) ... [2021-05-21 21:07:47,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:47" (1/1) ... [2021-05-21 21:07:47,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 21:07:47,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 21:07:47,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 21:07:47,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 21:07:47,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:47" (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 [2021-05-21 21:07:47,562 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 21:07:47,562 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 21:07:47,562 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 21:07:47,562 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 21:07:47,562 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 21:07:47,562 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 21:07:47,562 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 21:07:47,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 21:07:47,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 21:07:47,563 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 21:07:47,563 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 21:07:47,563 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 21:07:47,563 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 21:07:47,701 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 21:07:47,701 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 21:07:47,702 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:07:47 BoogieIcfgContainer [2021-05-21 21:07:47,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 21:07:47,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 21:07:47,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 21:07:47,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 21:07:47,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:07:47" (1/2) ... [2021-05-21 21:07:47,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8bade3 and model type mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:07:47, skipping insertion in model container [2021-05-21 21:07:47,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:07:47" (2/2) ... [2021-05-21 21:07:47,707 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-equiv.wvr.bpl [2021-05-21 21:07:47,710 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 21:07:47,710 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 21:07:47,711 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 21:07:47,711 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 21:07:47,744 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-21 21:07:47,758 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 21:07:47,774 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:07:47,775 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:07:47,775 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:07:47,775 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:07:47,775 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:07:47,792 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:07:47,792 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:07:47,792 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 21:07:47,798 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-05-21 21:07:47,837 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:47,839 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:47,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 21:07:47,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:47,845 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:47,845 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:47,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:47,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2116175235, now seen corresponding path program 1 times [2021-05-21 21:07:47,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:47,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532199596] [2021-05-21 21:07:47,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:47,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:47,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532199596] [2021-05-21 21:07:47,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532199596] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:07:47,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:07:47,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 21:07:47,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347469940] [2021-05-21 21:07:47,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 21:07:47,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:48,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 21:07:48,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:07:48,006 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:48,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:48,047 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-05-21 21:07:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 21:07:48,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 21:07:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:48,062 INFO L225 Difference]: With dead ends: 214 [2021-05-21 21:07:48,062 INFO L226 Difference]: Without dead ends: 199 [2021-05-21 21:07:48,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:07:48,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-21 21:07:48,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-05-21 21:07:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-05-21 21:07:48,117 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-05-21 21:07:48,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:48,118 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-05-21 21:07:48,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:48,118 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-05-21 21:07:48,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 21:07:48,120 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:48,120 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:48,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 21:07:48,121 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:48,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:48,124 INFO L82 PathProgramCache]: Analyzing trace with hash 655800031, now seen corresponding path program 1 times [2021-05-21 21:07:48,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:48,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594010657] [2021-05-21 21:07:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:48,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:48,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594010657] [2021-05-21 21:07:48,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594010657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:48,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654787508] [2021-05-21 21:07:48,186 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 [2021-05-21 21:07:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:48,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-21 21:07:48,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:48,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654787508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:48,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:48,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-21 21:07:48,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086600948] [2021-05-21 21:07:48,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:07:48,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:48,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:07:48,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:48,337 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:48,461 INFO L93 Difference]: Finished difference Result 365 states and 1020 transitions. [2021-05-21 21:07:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:07:48,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 21:07:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:48,463 INFO L225 Difference]: With dead ends: 365 [2021-05-21 21:07:48,463 INFO L226 Difference]: Without dead ends: 365 [2021-05-21 21:07:48,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:07:48,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-05-21 21:07:48,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 179. [2021-05-21 21:07:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 3.00561797752809) internal successors, (535), 178 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:48,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 535 transitions. [2021-05-21 21:07:48,473 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 535 transitions. Word has length 17 [2021-05-21 21:07:48,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:48,474 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 535 transitions. [2021-05-21 21:07:48,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:48,474 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 535 transitions. [2021-05-21 21:07:48,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 21:07:48,475 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:48,475 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:48,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-21 21:07:48,681 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:48,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:48,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2126444319, now seen corresponding path program 1 times [2021-05-21 21:07:48,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:48,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064980229] [2021-05-21 21:07:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:48,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:48,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064980229] [2021-05-21 21:07:48,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064980229] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:07:48,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:07:48,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 21:07:48,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132043045] [2021-05-21 21:07:48,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 21:07:48,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:48,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 21:07:48,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 21:07:48,705 INFO L87 Difference]: Start difference. First operand 179 states and 535 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:48,732 INFO L93 Difference]: Finished difference Result 237 states and 680 transitions. [2021-05-21 21:07:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 21:07:48,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 21:07:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:48,734 INFO L225 Difference]: With dead ends: 237 [2021-05-21 21:07:48,734 INFO L226 Difference]: Without dead ends: 237 [2021-05-21 21:07:48,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 21:07:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-21 21:07:48,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 188. [2021-05-21 21:07:48,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9893048128342246) internal successors, (559), 187 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 559 transitions. [2021-05-21 21:07:48,741 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 559 transitions. Word has length 17 [2021-05-21 21:07:48,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:48,742 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 559 transitions. [2021-05-21 21:07:48,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 559 transitions. [2021-05-21 21:07:48,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 21:07:48,743 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:48,743 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:48,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 21:07:48,743 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:48,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1369482973, now seen corresponding path program 2 times [2021-05-21 21:07:48,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:48,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303425548] [2021-05-21 21:07:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:48,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:48,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303425548] [2021-05-21 21:07:48,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303425548] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:07:48,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:07:48,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:07:48,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471743446] [2021-05-21 21:07:48,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:07:48,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:48,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:07:48,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:07:48,768 INFO L87 Difference]: Start difference. First operand 188 states and 559 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:48,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:48,793 INFO L93 Difference]: Finished difference Result 293 states and 808 transitions. [2021-05-21 21:07:48,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:07:48,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 21:07:48,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:48,795 INFO L225 Difference]: With dead ends: 293 [2021-05-21 21:07:48,795 INFO L226 Difference]: Without dead ends: 293 [2021-05-21 21:07:48,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:07:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-21 21:07:48,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 164. [2021-05-21 21:07:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.932515337423313) internal successors, (478), 163 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:48,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 478 transitions. [2021-05-21 21:07:48,801 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 478 transitions. Word has length 17 [2021-05-21 21:07:48,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:48,802 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 478 transitions. [2021-05-21 21:07:48,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:48,802 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 478 transitions. [2021-05-21 21:07:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 21:07:48,802 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:48,802 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:48,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 21:07:48,803 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:48,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:48,803 INFO L82 PathProgramCache]: Analyzing trace with hash 984474203, now seen corresponding path program 1 times [2021-05-21 21:07:48,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:48,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061764054] [2021-05-21 21:07:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:48,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:48,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061764054] [2021-05-21 21:07:48,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061764054] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:48,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236219302] [2021-05-21 21:07:48,824 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 [2021-05-21 21:07:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:48,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-21 21:07:48,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:48,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236219302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:48,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:48,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-21 21:07:48,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270972824] [2021-05-21 21:07:48,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:07:48,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:48,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:07:48,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:48,917 INFO L87 Difference]: Start difference. First operand 164 states and 478 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:48,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:48,970 INFO L93 Difference]: Finished difference Result 348 states and 971 transitions. [2021-05-21 21:07:48,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:07:48,970 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 21:07:48,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:48,972 INFO L225 Difference]: With dead ends: 348 [2021-05-21 21:07:48,972 INFO L226 Difference]: Without dead ends: 348 [2021-05-21 21:07:48,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:07:48,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-21 21:07:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 170. [2021-05-21 21:07:48,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.964497041420118) internal successors, (501), 169 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 501 transitions. [2021-05-21 21:07:48,986 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 501 transitions. Word has length 17 [2021-05-21 21:07:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:48,987 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 501 transitions. [2021-05-21 21:07:48,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:48,988 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 501 transitions. [2021-05-21 21:07:48,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 21:07:48,989 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:48,989 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:49,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:49,208 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:49,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:49,209 INFO L82 PathProgramCache]: Analyzing trace with hash -427193509, now seen corresponding path program 3 times [2021-05-21 21:07:49,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:49,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762248278] [2021-05-21 21:07:49,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:49,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:49,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762248278] [2021-05-21 21:07:49,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762248278] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:07:49,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:07:49,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 21:07:49,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727703224] [2021-05-21 21:07:49,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 21:07:49,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:49,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 21:07:49,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 21:07:49,232 INFO L87 Difference]: Start difference. First operand 170 states and 501 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:49,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:49,267 INFO L93 Difference]: Finished difference Result 204 states and 542 transitions. [2021-05-21 21:07:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:07:49,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 21:07:49,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:49,268 INFO L225 Difference]: With dead ends: 204 [2021-05-21 21:07:49,268 INFO L226 Difference]: Without dead ends: 174 [2021-05-21 21:07:49,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:07:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-21 21:07:49,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 155. [2021-05-21 21:07:49,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.779220779220779) internal successors, (428), 154 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 428 transitions. [2021-05-21 21:07:49,272 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 428 transitions. Word has length 17 [2021-05-21 21:07:49,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:49,272 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 428 transitions. [2021-05-21 21:07:49,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 428 transitions. [2021-05-21 21:07:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 21:07:49,273 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:49,273 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:49,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 21:07:49,273 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:49,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1972981309, now seen corresponding path program 1 times [2021-05-21 21:07:49,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:49,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717803080] [2021-05-21 21:07:49,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:49,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:49,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717803080] [2021-05-21 21:07:49,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717803080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:49,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959813065] [2021-05-21 21:07:49,300 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 [2021-05-21 21:07:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:49,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:07:49,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:49,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959813065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:49,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:49,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-21 21:07:49,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389161313] [2021-05-21 21:07:49,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:07:49,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:49,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:07:49,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:07:49,384 INFO L87 Difference]: Start difference. First operand 155 states and 428 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:49,450 INFO L93 Difference]: Finished difference Result 284 states and 786 transitions. [2021-05-21 21:07:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:07:49,451 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 21:07:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:49,452 INFO L225 Difference]: With dead ends: 284 [2021-05-21 21:07:49,452 INFO L226 Difference]: Without dead ends: 284 [2021-05-21 21:07:49,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:07:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-21 21:07:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 216. [2021-05-21 21:07:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.827906976744186) internal successors, (608), 215 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:49,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 608 transitions. [2021-05-21 21:07:49,456 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 608 transitions. Word has length 19 [2021-05-21 21:07:49,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:49,456 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 608 transitions. [2021-05-21 21:07:49,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:49,456 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 608 transitions. [2021-05-21 21:07:49,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 21:07:49,457 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:49,457 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:49,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:49,677 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:49,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:49,677 INFO L82 PathProgramCache]: Analyzing trace with hash 179262851, now seen corresponding path program 1 times [2021-05-21 21:07:49,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:49,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628788622] [2021-05-21 21:07:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:49,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:49,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628788622] [2021-05-21 21:07:49,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628788622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:49,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305173018] [2021-05-21 21:07:49,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2021-05-21 21:07:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:49,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:07:49,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:49,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305173018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:49,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:49,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-05-21 21:07:49,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366650472] [2021-05-21 21:07:49,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:07:49,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:49,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:07:49,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:07:49,878 INFO L87 Difference]: Start difference. First operand 216 states and 608 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:49,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:49,909 INFO L93 Difference]: Finished difference Result 348 states and 985 transitions. [2021-05-21 21:07:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:07:49,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 21:07:49,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:49,911 INFO L225 Difference]: With dead ends: 348 [2021-05-21 21:07:49,911 INFO L226 Difference]: Without dead ends: 327 [2021-05-21 21:07:49,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:07:49,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-21 21:07:49,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 250. [2021-05-21 21:07:49,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.895582329317269) internal successors, (721), 249 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:49,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 721 transitions. [2021-05-21 21:07:49,916 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 721 transitions. Word has length 19 [2021-05-21 21:07:49,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:49,916 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 721 transitions. [2021-05-21 21:07:49,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:49,916 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 721 transitions. [2021-05-21 21:07:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 21:07:49,917 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:49,917 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:50,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:50,133 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:50,133 INFO L82 PathProgramCache]: Analyzing trace with hash -701176209, now seen corresponding path program 2 times [2021-05-21 21:07:50,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:50,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755345655] [2021-05-21 21:07:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:50,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:50,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755345655] [2021-05-21 21:07:50,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755345655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:50,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883343448] [2021-05-21 21:07:50,176 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 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 [2021-05-21 21:07:50,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:07:50,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:50,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:07:50,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:50,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883343448] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:50,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:50,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-05-21 21:07:50,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228102469] [2021-05-21 21:07:50,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:07:50,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:50,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:07:50,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:07:50,247 INFO L87 Difference]: Start difference. First operand 250 states and 721 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:50,274 INFO L93 Difference]: Finished difference Result 521 states and 1486 transitions. [2021-05-21 21:07:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:07:50,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 21:07:50,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:50,276 INFO L225 Difference]: With dead ends: 521 [2021-05-21 21:07:50,277 INFO L226 Difference]: Without dead ends: 500 [2021-05-21 21:07:50,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:07:50,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-05-21 21:07:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 290. [2021-05-21 21:07:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.0069204152249136) internal successors, (869), 289 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 869 transitions. [2021-05-21 21:07:50,285 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 869 transitions. Word has length 19 [2021-05-21 21:07:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:50,286 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 869 transitions. [2021-05-21 21:07:50,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:50,286 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 869 transitions. [2021-05-21 21:07:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 21:07:50,286 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:50,287 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:50,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:50,501 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:50,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:50,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1410387015, now seen corresponding path program 3 times [2021-05-21 21:07:50,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:50,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446055129] [2021-05-21 21:07:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:50,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:50,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446055129] [2021-05-21 21:07:50,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446055129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:50,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294760294] [2021-05-21 21:07:50,559 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 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 [2021-05-21 21:07:50,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:07:50,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:50,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:07:50,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:50,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294760294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:50,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:50,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-05-21 21:07:50,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519771696] [2021-05-21 21:07:50,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:07:50,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:50,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:07:50,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:07:50,654 INFO L87 Difference]: Start difference. First operand 290 states and 869 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:50,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:50,685 INFO L93 Difference]: Finished difference Result 528 states and 1543 transitions. [2021-05-21 21:07:50,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:07:50,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 21:07:50,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:50,687 INFO L225 Difference]: With dead ends: 528 [2021-05-21 21:07:50,687 INFO L226 Difference]: Without dead ends: 507 [2021-05-21 21:07:50,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:07:50,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-05-21 21:07:50,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 326. [2021-05-21 21:07:50,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.08) internal successors, (1001), 325 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:50,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1001 transitions. [2021-05-21 21:07:50,694 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1001 transitions. Word has length 19 [2021-05-21 21:07:50,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:50,694 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 1001 transitions. [2021-05-21 21:07:50,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:50,694 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1001 transitions. [2021-05-21 21:07:50,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 21:07:50,695 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:50,695 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:50,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:50,907 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:50,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1264041205, now seen corresponding path program 2 times [2021-05-21 21:07:50,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:50,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241063114] [2021-05-21 21:07:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:50,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:50,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241063114] [2021-05-21 21:07:50,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241063114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:50,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003051518] [2021-05-21 21:07:50,927 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 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 [2021-05-21 21:07:50,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:07:50,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:50,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:07:50,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:50,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003051518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:50,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:50,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-21 21:07:50,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350049726] [2021-05-21 21:07:50,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:07:50,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:50,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:07:50,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:50,991 INFO L87 Difference]: Start difference. First operand 326 states and 1001 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:51,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:51,063 INFO L93 Difference]: Finished difference Result 686 states and 2051 transitions. [2021-05-21 21:07:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:07:51,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 21:07:51,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:51,066 INFO L225 Difference]: With dead ends: 686 [2021-05-21 21:07:51,066 INFO L226 Difference]: Without dead ends: 686 [2021-05-21 21:07:51,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:07:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-05-21 21:07:51,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 370. [2021-05-21 21:07:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.2466124661246614) internal successors, (1198), 369 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1198 transitions. [2021-05-21 21:07:51,080 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1198 transitions. Word has length 19 [2021-05-21 21:07:51,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:51,080 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1198 transitions. [2021-05-21 21:07:51,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:51,080 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1198 transitions. [2021-05-21 21:07:51,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 21:07:51,081 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:51,081 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:51,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:51,293 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:51,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:51,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1749845309, now seen corresponding path program 3 times [2021-05-21 21:07:51,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:51,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434833879] [2021-05-21 21:07:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:51,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:51,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434833879] [2021-05-21 21:07:51,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434833879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:51,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681114188] [2021-05-21 21:07:51,313 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 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 [2021-05-21 21:07:51,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:07:51,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:51,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:07:51,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:51,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681114188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:51,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:51,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-21 21:07:51,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610621339] [2021-05-21 21:07:51,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:07:51,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:51,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:07:51,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:51,382 INFO L87 Difference]: Start difference. First operand 370 states and 1198 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:51,478 INFO L93 Difference]: Finished difference Result 642 states and 2005 transitions. [2021-05-21 21:07:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:07:51,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 21:07:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:51,481 INFO L225 Difference]: With dead ends: 642 [2021-05-21 21:07:51,481 INFO L226 Difference]: Without dead ends: 642 [2021-05-21 21:07:51,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:07:51,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-05-21 21:07:51,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 388. [2021-05-21 21:07:51,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.289405684754522) internal successors, (1273), 387 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:51,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1273 transitions. [2021-05-21 21:07:51,490 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1273 transitions. Word has length 19 [2021-05-21 21:07:51,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:51,490 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1273 transitions. [2021-05-21 21:07:51,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:51,490 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1273 transitions. [2021-05-21 21:07:51,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:51,491 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:51,491 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:51,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-21 21:07:51,705 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:51,705 INFO L82 PathProgramCache]: Analyzing trace with hash 768837147, now seen corresponding path program 4 times [2021-05-21 21:07:51,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:51,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574822488] [2021-05-21 21:07:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:51,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:51,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574822488] [2021-05-21 21:07:51,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574822488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:51,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80724748] [2021-05-21 21:07:51,742 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 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 [2021-05-21 21:07:51,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:07:51,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:51,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:07:51,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:51,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80724748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:51,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:51,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:07:51,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282850276] [2021-05-21 21:07:51,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:07:51,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:51,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:07:51,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:51,827 INFO L87 Difference]: Start difference. First operand 388 states and 1273 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:51,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:51,863 INFO L93 Difference]: Finished difference Result 752 states and 2293 transitions. [2021-05-21 21:07:51,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:07:51,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:07:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:51,866 INFO L225 Difference]: With dead ends: 752 [2021-05-21 21:07:51,866 INFO L226 Difference]: Without dead ends: 731 [2021-05-21 21:07:51,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:51,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-05-21 21:07:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 468. [2021-05-21 21:07:51,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.278372591006424) internal successors, (1531), 467 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1531 transitions. [2021-05-21 21:07:51,877 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1531 transitions. Word has length 21 [2021-05-21 21:07:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:51,877 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1531 transitions. [2021-05-21 21:07:51,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:51,877 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1531 transitions. [2021-05-21 21:07:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:51,880 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:51,880 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:52,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:52,089 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:52,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1069401327, now seen corresponding path program 5 times [2021-05-21 21:07:52,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:52,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230115681] [2021-05-21 21:07:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:52,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:52,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230115681] [2021-05-21 21:07:52,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230115681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:52,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777485924] [2021-05-21 21:07:52,132 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 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 [2021-05-21 21:07:52,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:07:52,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:52,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:07:52,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:52,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777485924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:52,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:52,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:07:52,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551620695] [2021-05-21 21:07:52,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:07:52,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:52,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:07:52,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:52,211 INFO L87 Difference]: Start difference. First operand 468 states and 1531 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:52,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:52,248 INFO L93 Difference]: Finished difference Result 738 states and 2318 transitions. [2021-05-21 21:07:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:07:52,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:07:52,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:52,251 INFO L225 Difference]: With dead ends: 738 [2021-05-21 21:07:52,251 INFO L226 Difference]: Without dead ends: 717 [2021-05-21 21:07:52,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:52,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-05-21 21:07:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 485. [2021-05-21 21:07:52,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.3161157024793386) internal successors, (1605), 484 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:52,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1605 transitions. [2021-05-21 21:07:52,261 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1605 transitions. Word has length 21 [2021-05-21 21:07:52,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:52,262 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1605 transitions. [2021-05-21 21:07:52,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1605 transitions. [2021-05-21 21:07:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:52,263 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:52,263 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:52,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:52,470 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:52,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:52,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1991189035, now seen corresponding path program 6 times [2021-05-21 21:07:52,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:52,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911490334] [2021-05-21 21:07:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:52,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:52,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911490334] [2021-05-21 21:07:52,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911490334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:52,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097303056] [2021-05-21 21:07:52,514 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 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 [2021-05-21 21:07:52,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:07:52,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:52,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:07:52,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:52,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097303056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:52,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:52,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:07:52,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766627444] [2021-05-21 21:07:52,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:07:52,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:52,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:07:52,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:52,605 INFO L87 Difference]: Start difference. First operand 485 states and 1605 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:52,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:52,645 INFO L93 Difference]: Finished difference Result 608 states and 1958 transitions. [2021-05-21 21:07:52,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:07:52,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:07:52,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:52,648 INFO L225 Difference]: With dead ends: 608 [2021-05-21 21:07:52,648 INFO L226 Difference]: Without dead ends: 587 [2021-05-21 21:07:52,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:52,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-05-21 21:07:52,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 495. [2021-05-21 21:07:52,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.3238866396761133) internal successors, (1642), 494 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:52,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1642 transitions. [2021-05-21 21:07:52,659 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1642 transitions. Word has length 21 [2021-05-21 21:07:52,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:52,659 INFO L482 AbstractCegarLoop]: Abstraction has 495 states and 1642 transitions. [2021-05-21 21:07:52,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:52,660 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1642 transitions. [2021-05-21 21:07:52,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:52,660 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:52,661 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:52,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 21:07:52,869 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:52,869 INFO L82 PathProgramCache]: Analyzing trace with hash -239271515, now seen corresponding path program 4 times [2021-05-21 21:07:52,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:52,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602681328] [2021-05-21 21:07:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:52,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:52,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602681328] [2021-05-21 21:07:52,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602681328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:52,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363692287] [2021-05-21 21:07:52,898 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 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 [2021-05-21 21:07:52,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:07:52,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:52,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:07:52,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:52,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363692287] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:07:52,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-21 21:07:52,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-05-21 21:07:52,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879130390] [2021-05-21 21:07:52,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:07:52,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:52,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:07:52,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:07:52,953 INFO L87 Difference]: Start difference. First operand 495 states and 1642 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:52,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:52,995 INFO L93 Difference]: Finished difference Result 728 states and 2245 transitions. [2021-05-21 21:07:52,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:07:52,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:07:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:52,998 INFO L225 Difference]: With dead ends: 728 [2021-05-21 21:07:52,998 INFO L226 Difference]: Without dead ends: 696 [2021-05-21 21:07:52,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:07:52,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-05-21 21:07:53,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 583. [2021-05-21 21:07:53,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.261168384879725) internal successors, (1898), 582 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:53,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1898 transitions. [2021-05-21 21:07:53,008 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1898 transitions. Word has length 21 [2021-05-21 21:07:53,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:53,008 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1898 transitions. [2021-05-21 21:07:53,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:53,009 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1898 transitions. [2021-05-21 21:07:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:53,010 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:53,010 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:53,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 21:07:53,227 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:53,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:53,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2124383007, now seen corresponding path program 5 times [2021-05-21 21:07:53,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:53,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175415419] [2021-05-21 21:07:53,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:53,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:53,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175415419] [2021-05-21 21:07:53,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175415419] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:07:53,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:07:53,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 21:07:53,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671281393] [2021-05-21 21:07:53,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:07:53,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:53,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:07:53,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:07:53,251 INFO L87 Difference]: Start difference. First operand 583 states and 1898 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:53,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:53,267 INFO L93 Difference]: Finished difference Result 673 states and 2107 transitions. [2021-05-21 21:07:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:07:53,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:07:53,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:53,269 INFO L225 Difference]: With dead ends: 673 [2021-05-21 21:07:53,269 INFO L226 Difference]: Without dead ends: 625 [2021-05-21 21:07:53,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:07:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-05-21 21:07:53,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 529. [2021-05-21 21:07:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.2556818181818183) internal successors, (1719), 528 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1719 transitions. [2021-05-21 21:07:53,279 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1719 transitions. Word has length 21 [2021-05-21 21:07:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:53,279 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1719 transitions. [2021-05-21 21:07:53,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:53,279 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1719 transitions. [2021-05-21 21:07:53,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:53,280 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:53,280 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:53,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-21 21:07:53,280 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:53,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:53,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1743968741, now seen corresponding path program 6 times [2021-05-21 21:07:53,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:53,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738196501] [2021-05-21 21:07:53,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:53,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:53,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738196501] [2021-05-21 21:07:53,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738196501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:53,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573413880] [2021-05-21 21:07:53,296 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 [2021-05-21 21:07:53,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:07:53,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:53,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:07:53,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:53,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573413880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:53,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:53,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-21 21:07:53,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607017167] [2021-05-21 21:07:53,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:07:53,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:53,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:07:53,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:53,362 INFO L87 Difference]: Start difference. First operand 529 states and 1719 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2021-05-21 21:07:53,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:53,439 INFO L93 Difference]: Finished difference Result 834 states and 2517 transitions. [2021-05-21 21:07:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:07:53,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 21 [2021-05-21 21:07:53,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:53,442 INFO L225 Difference]: With dead ends: 834 [2021-05-21 21:07:53,442 INFO L226 Difference]: Without dead ends: 804 [2021-05-21 21:07:53,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:07:53,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-05-21 21:07:53,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 598. [2021-05-21 21:07:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.2981574539363483) internal successors, (1969), 597 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:53,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1969 transitions. [2021-05-21 21:07:53,454 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1969 transitions. Word has length 21 [2021-05-21 21:07:53,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:53,454 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 1969 transitions. [2021-05-21 21:07:53,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2021-05-21 21:07:53,454 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1969 transitions. [2021-05-21 21:07:53,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:53,455 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:53,456 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:53,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 21:07:53,673 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:53,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:53,673 INFO L82 PathProgramCache]: Analyzing trace with hash 685016161, now seen corresponding path program 7 times [2021-05-21 21:07:53,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:53,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717021125] [2021-05-21 21:07:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:53,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:53,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717021125] [2021-05-21 21:07:53,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717021125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:53,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974783293] [2021-05-21 21:07:53,688 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 [2021-05-21 21:07:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:53,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:07:53,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:53,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974783293] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:07:53,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-21 21:07:53,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-05-21 21:07:53,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851253544] [2021-05-21 21:07:53,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:07:53,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:53,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:07:53,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:53,744 INFO L87 Difference]: Start difference. First operand 598 states and 1969 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:53,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:53,799 INFO L93 Difference]: Finished difference Result 790 states and 2403 transitions. [2021-05-21 21:07:53,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:07:53,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:07:53,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:53,802 INFO L225 Difference]: With dead ends: 790 [2021-05-21 21:07:53,802 INFO L226 Difference]: Without dead ends: 782 [2021-05-21 21:07:53,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:07:53,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-05-21 21:07:53,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 591. [2021-05-21 21:07:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.2711864406779663) internal successors, (1930), 590 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:53,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1930 transitions. [2021-05-21 21:07:53,814 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1930 transitions. Word has length 21 [2021-05-21 21:07:53,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:53,814 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1930 transitions. [2021-05-21 21:07:53,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:53,814 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1930 transitions. [2021-05-21 21:07:53,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:53,815 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:53,815 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:54,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:54,030 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:54,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1433719009, now seen corresponding path program 8 times [2021-05-21 21:07:54,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:54,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124123781] [2021-05-21 21:07:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:54,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:54,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124123781] [2021-05-21 21:07:54,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124123781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:54,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269022378] [2021-05-21 21:07:54,070 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 [2021-05-21 21:07:54,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:07:54,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:54,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:07:54,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:54,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:54,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269022378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:54,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:54,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-05-21 21:07:54,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402503052] [2021-05-21 21:07:54,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:07:54,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:54,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:07:54,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:07:54,147 INFO L87 Difference]: Start difference. First operand 591 states and 1930 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:54,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:54,241 INFO L93 Difference]: Finished difference Result 768 states and 2356 transitions. [2021-05-21 21:07:54,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:07:54,242 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:07:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:54,245 INFO L225 Difference]: With dead ends: 768 [2021-05-21 21:07:54,245 INFO L226 Difference]: Without dead ends: 732 [2021-05-21 21:07:54,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:07:54,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-05-21 21:07:54,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 589. [2021-05-21 21:07:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 3.241496598639456) internal successors, (1906), 588 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:54,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1906 transitions. [2021-05-21 21:07:54,255 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1906 transitions. Word has length 21 [2021-05-21 21:07:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:54,255 INFO L482 AbstractCegarLoop]: Abstraction has 589 states and 1906 transitions. [2021-05-21 21:07:54,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:54,255 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1906 transitions. [2021-05-21 21:07:54,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:54,257 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:54,257 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:54,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:54,472 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:54,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:54,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1263605021, now seen corresponding path program 9 times [2021-05-21 21:07:54,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:54,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017089191] [2021-05-21 21:07:54,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:54,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:54,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017089191] [2021-05-21 21:07:54,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017089191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:54,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786472057] [2021-05-21 21:07:54,506 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 [2021-05-21 21:07:54,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:07:54,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:54,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:07:54,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:54,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786472057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:54,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:54,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-21 21:07:54,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790025188] [2021-05-21 21:07:54,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:07:54,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:54,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:07:54,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:07:54,566 INFO L87 Difference]: Start difference. First operand 589 states and 1906 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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) [2021-05-21 21:07:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:54,670 INFO L93 Difference]: Finished difference Result 1001 states and 3072 transitions. [2021-05-21 21:07:54,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:07:54,671 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 21 [2021-05-21 21:07:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:54,674 INFO L225 Difference]: With dead ends: 1001 [2021-05-21 21:07:54,674 INFO L226 Difference]: Without dead ends: 987 [2021-05-21 21:07:54,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:07:54,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-05-21 21:07:54,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 737. [2021-05-21 21:07:54,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.2880434782608696) internal successors, (2420), 736 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2420 transitions. [2021-05-21 21:07:54,687 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2420 transitions. Word has length 21 [2021-05-21 21:07:54,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:54,687 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2420 transitions. [2021-05-21 21:07:54,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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) [2021-05-21 21:07:54,687 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2420 transitions. [2021-05-21 21:07:54,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:54,688 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:54,688 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:54,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:54,904 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:54,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:54,904 INFO L82 PathProgramCache]: Analyzing trace with hash -585994983, now seen corresponding path program 10 times [2021-05-21 21:07:54,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:54,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388542622] [2021-05-21 21:07:54,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:54,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:54,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388542622] [2021-05-21 21:07:54,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388542622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:54,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968680984] [2021-05-21 21:07:54,931 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 [2021-05-21 21:07:54,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:07:54,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:54,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:07:54,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:55,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968680984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:55,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:55,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-21 21:07:55,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684959189] [2021-05-21 21:07:55,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:07:55,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:55,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:07:55,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:07:55,015 INFO L87 Difference]: Start difference. First operand 737 states and 2420 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:55,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:55,101 INFO L93 Difference]: Finished difference Result 1120 states and 3472 transitions. [2021-05-21 21:07:55,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:07:55,102 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:07:55,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:55,105 INFO L225 Difference]: With dead ends: 1120 [2021-05-21 21:07:55,105 INFO L226 Difference]: Without dead ends: 1120 [2021-05-21 21:07:55,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:07:55,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-05-21 21:07:55,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 810. [2021-05-21 21:07:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.3325092707045734) internal successors, (2696), 809 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:55,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2696 transitions. [2021-05-21 21:07:55,121 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2696 transitions. Word has length 21 [2021-05-21 21:07:55,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:55,121 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2696 transitions. [2021-05-21 21:07:55,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:55,121 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2696 transitions. [2021-05-21 21:07:55,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:55,123 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:55,123 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:55,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-21 21:07:55,338 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:55,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:55,339 INFO L82 PathProgramCache]: Analyzing trace with hash -245591027, now seen corresponding path program 11 times [2021-05-21 21:07:55,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:55,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919264730] [2021-05-21 21:07:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:55,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:55,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919264730] [2021-05-21 21:07:55,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919264730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:55,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735575853] [2021-05-21 21:07:55,355 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) [2021-05-21 21:07:55,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:07:55,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:55,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:07:55,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:55,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735575853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:55,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:55,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-05-21 21:07:55,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641544701] [2021-05-21 21:07:55,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:07:55,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:55,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:07:55,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:07:55,450 INFO L87 Difference]: Start difference. First operand 810 states and 2696 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:55,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:55,523 INFO L93 Difference]: Finished difference Result 1340 states and 4210 transitions. [2021-05-21 21:07:55,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:07:55,525 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:07:55,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:55,529 INFO L225 Difference]: With dead ends: 1340 [2021-05-21 21:07:55,529 INFO L226 Difference]: Without dead ends: 1332 [2021-05-21 21:07:55,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:07:55,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-05-21 21:07:55,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 992. [2021-05-21 21:07:55,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.375378405650858) internal successors, (3345), 991 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:55,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3345 transitions. [2021-05-21 21:07:55,547 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3345 transitions. Word has length 21 [2021-05-21 21:07:55,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:55,548 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3345 transitions. [2021-05-21 21:07:55,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:55,548 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3345 transitions. [2021-05-21 21:07:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:55,549 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:55,549 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:55,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-21 21:07:55,765 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:55,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:55,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1657258739, now seen corresponding path program 12 times [2021-05-21 21:07:55,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:55,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017418427] [2021-05-21 21:07:55,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:55,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:55,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017418427] [2021-05-21 21:07:55,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017418427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:55,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759091130] [2021-05-21 21:07:55,793 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 [2021-05-21 21:07:55,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:07:55,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:55,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:07:55,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:55,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759091130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:55,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:55,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-21 21:07:55,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633252232] [2021-05-21 21:07:55,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:07:55,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:55,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:07:55,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:07:55,870 INFO L87 Difference]: Start difference. First operand 992 states and 3345 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:56,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:56,005 INFO L93 Difference]: Finished difference Result 1623 states and 5234 transitions. [2021-05-21 21:07:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:07:56,005 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:07:56,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:56,011 INFO L225 Difference]: With dead ends: 1623 [2021-05-21 21:07:56,011 INFO L226 Difference]: Without dead ends: 1615 [2021-05-21 21:07:56,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:07:56,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-05-21 21:07:56,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1215. [2021-05-21 21:07:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.383031301482702) internal successors, (4107), 1214 states have internal predecessors, (4107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 4107 transitions. [2021-05-21 21:07:56,032 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 4107 transitions. Word has length 21 [2021-05-21 21:07:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:56,032 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 4107 transitions. [2021-05-21 21:07:56,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 4107 transitions. [2021-05-21 21:07:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:56,034 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:56,034 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:56,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-21 21:07:56,249 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:56,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:56,250 INFO L82 PathProgramCache]: Analyzing trace with hash -372466675, now seen corresponding path program 13 times [2021-05-21 21:07:56,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:56,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757016500] [2021-05-21 21:07:56,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:56,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:56,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757016500] [2021-05-21 21:07:56,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757016500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:56,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519991853] [2021-05-21 21:07:56,272 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 [2021-05-21 21:07:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:56,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:07:56,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:56,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519991853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:56,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:56,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-05-21 21:07:56,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505834913] [2021-05-21 21:07:56,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:07:56,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:56,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:07:56,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:07:56,358 INFO L87 Difference]: Start difference. First operand 1215 states and 4107 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:56,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:56,446 INFO L93 Difference]: Finished difference Result 1527 states and 4890 transitions. [2021-05-21 21:07:56,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:07:56,446 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:07:56,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:56,450 INFO L225 Difference]: With dead ends: 1527 [2021-05-21 21:07:56,450 INFO L226 Difference]: Without dead ends: 1515 [2021-05-21 21:07:56,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:07:56,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-05-21 21:07:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1211. [2021-05-21 21:07:56,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 3.3826446280991735) internal successors, (4093), 1210 states have internal predecessors, (4093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 4093 transitions. [2021-05-21 21:07:56,470 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 4093 transitions. Word has length 21 [2021-05-21 21:07:56,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:56,470 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 4093 transitions. [2021-05-21 21:07:56,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:56,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 4093 transitions. [2021-05-21 21:07:56,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:56,472 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:56,472 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:56,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 21:07:56,686 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:56,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:56,686 INFO L82 PathProgramCache]: Analyzing trace with hash 655355345, now seen corresponding path program 14 times [2021-05-21 21:07:56,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:56,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350071207] [2021-05-21 21:07:56,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:56,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:56,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350071207] [2021-05-21 21:07:56,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350071207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:56,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35891814] [2021-05-21 21:07:56,709 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) [2021-05-21 21:07:56,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:07:56,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:56,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:07:56,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:56,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35891814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:56,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:56,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-21 21:07:56,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036917645] [2021-05-21 21:07:56,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:07:56,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:56,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:07:56,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:07:56,787 INFO L87 Difference]: Start difference. First operand 1211 states and 4093 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-05-21 21:07:56,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:56,917 INFO L93 Difference]: Finished difference Result 2197 states and 7082 transitions. [2021-05-21 21:07:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:07:56,917 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 21 [2021-05-21 21:07:56,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:56,924 INFO L225 Difference]: With dead ends: 2197 [2021-05-21 21:07:56,924 INFO L226 Difference]: Without dead ends: 2197 [2021-05-21 21:07:56,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:07:56,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-05-21 21:07:56,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1448. [2021-05-21 21:07:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.4457498272287492) internal successors, (4986), 1447 states have internal predecessors, (4986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:56,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 4986 transitions. [2021-05-21 21:07:56,948 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 4986 transitions. Word has length 21 [2021-05-21 21:07:56,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:56,948 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 4986 transitions. [2021-05-21 21:07:56,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-05-21 21:07:56,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 4986 transitions. [2021-05-21 21:07:56,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:56,950 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:56,951 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:57,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 21:07:57,165 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:57,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:57,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2086226193, now seen corresponding path program 15 times [2021-05-21 21:07:57,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:57,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452237987] [2021-05-21 21:07:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:57,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:57,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452237987] [2021-05-21 21:07:57,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452237987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:57,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908685507] [2021-05-21 21:07:57,196 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) [2021-05-21 21:07:57,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:07:57,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:57,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:07:57,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:57,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908685507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:57,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:57,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-05-21 21:07:57,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046833336] [2021-05-21 21:07:57,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:07:57,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:57,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:07:57,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:07:57,270 INFO L87 Difference]: Start difference. First operand 1448 states and 4986 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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) [2021-05-21 21:07:57,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:57,420 INFO L93 Difference]: Finished difference Result 1739 states and 5729 transitions. [2021-05-21 21:07:57,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:07:57,420 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 21 [2021-05-21 21:07:57,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:57,423 INFO L225 Difference]: With dead ends: 1739 [2021-05-21 21:07:57,423 INFO L226 Difference]: Without dead ends: 1693 [2021-05-21 21:07:57,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:07:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-05-21 21:07:57,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1505. [2021-05-21 21:07:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 3.4095744680851063) internal successors, (5128), 1504 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:57,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 5128 transitions. [2021-05-21 21:07:57,447 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 5128 transitions. Word has length 21 [2021-05-21 21:07:57,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:57,447 INFO L482 AbstractCegarLoop]: Abstraction has 1505 states and 5128 transitions. [2021-05-21 21:07:57,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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) [2021-05-21 21:07:57,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 5128 transitions. [2021-05-21 21:07:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:57,449 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:57,449 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:57,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:57,665 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:57,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:57,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1917770029, now seen corresponding path program 7 times [2021-05-21 21:07:57,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:57,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353970285] [2021-05-21 21:07:57,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:57,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:57,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353970285] [2021-05-21 21:07:57,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353970285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:57,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485229712] [2021-05-21 21:07:57,712 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 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 [2021-05-21 21:07:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:57,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:07:57,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:57,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485229712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:57,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:57,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:07:57,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307217339] [2021-05-21 21:07:57,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:07:57,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:57,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:07:57,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:57,786 INFO L87 Difference]: Start difference. First operand 1505 states and 5128 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:57,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:57,823 INFO L93 Difference]: Finished difference Result 1808 states and 5991 transitions. [2021-05-21 21:07:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:07:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:07:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:57,826 INFO L225 Difference]: With dead ends: 1808 [2021-05-21 21:07:57,826 INFO L226 Difference]: Without dead ends: 1787 [2021-05-21 21:07:57,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-05-21 21:07:57,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1518. [2021-05-21 21:07:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.4225444957152273) internal successors, (5192), 1517 states have internal predecessors, (5192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5192 transitions. [2021-05-21 21:07:57,852 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5192 transitions. Word has length 21 [2021-05-21 21:07:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:57,852 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5192 transitions. [2021-05-21 21:07:57,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:57,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5192 transitions. [2021-05-21 21:07:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:57,855 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:57,855 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:58,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 21:07:58,069 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1455409559, now seen corresponding path program 8 times [2021-05-21 21:07:58,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:58,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335999719] [2021-05-21 21:07:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:58,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:58,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335999719] [2021-05-21 21:07:58,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335999719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:58,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311205927] [2021-05-21 21:07:58,121 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 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 [2021-05-21 21:07:58,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:07:58,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:58,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:07:58,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:58,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311205927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:58,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:58,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:07:58,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427462718] [2021-05-21 21:07:58,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:07:58,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:58,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:07:58,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:58,212 INFO L87 Difference]: Start difference. First operand 1518 states and 5192 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:58,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:58,256 INFO L93 Difference]: Finished difference Result 1722 states and 5770 transitions. [2021-05-21 21:07:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:07:58,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:07:58,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:58,259 INFO L225 Difference]: With dead ends: 1722 [2021-05-21 21:07:58,260 INFO L226 Difference]: Without dead ends: 1701 [2021-05-21 21:07:58,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:58,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-05-21 21:07:58,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1528. [2021-05-21 21:07:58,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 3.4282907662082516) internal successors, (5235), 1527 states have internal predecessors, (5235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:58,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 5235 transitions. [2021-05-21 21:07:58,284 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 5235 transitions. Word has length 21 [2021-05-21 21:07:58,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:58,284 INFO L482 AbstractCegarLoop]: Abstraction has 1528 states and 5235 transitions. [2021-05-21 21:07:58,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:58,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 5235 transitions. [2021-05-21 21:07:58,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:07:58,286 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:58,286 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:58,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 21:07:58,503 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:58,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:58,503 INFO L82 PathProgramCache]: Analyzing trace with hash -355017005, now seen corresponding path program 9 times [2021-05-21 21:07:58,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:58,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070836293] [2021-05-21 21:07:58,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:58,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:58,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070836293] [2021-05-21 21:07:58,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070836293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:58,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099849418] [2021-05-21 21:07:58,572 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 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 [2021-05-21 21:07:58,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:07:58,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:58,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:07:58,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:07:58,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099849418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:58,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:58,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:07:58,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991268835] [2021-05-21 21:07:58,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:07:58,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:58,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:07:58,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:58,712 INFO L87 Difference]: Start difference. First operand 1528 states and 5235 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:58,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:58,750 INFO L93 Difference]: Finished difference Result 1802 states and 6001 transitions. [2021-05-21 21:07:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:07:58,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:07:58,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:58,767 INFO L225 Difference]: With dead ends: 1802 [2021-05-21 21:07:58,767 INFO L226 Difference]: Without dead ends: 1781 [2021-05-21 21:07:58,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:07:58,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-05-21 21:07:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1544. [2021-05-21 21:07:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.436811406351264) internal successors, (5303), 1543 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5303 transitions. [2021-05-21 21:07:58,796 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5303 transitions. Word has length 21 [2021-05-21 21:07:58,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:58,796 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 5303 transitions. [2021-05-21 21:07:58,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5303 transitions. [2021-05-21 21:07:58,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:07:58,799 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:58,799 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:59,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:59,009 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash -343789315, now seen corresponding path program 10 times [2021-05-21 21:07:59,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:59,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102294781] [2021-05-21 21:07:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:59,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:59,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102294781] [2021-05-21 21:07:59,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102294781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:59,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492607208] [2021-05-21 21:07:59,037 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 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 [2021-05-21 21:07:59,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:07:59,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:07:59,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:07:59,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:59,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492607208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:59,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:59,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 21:07:59,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121990613] [2021-05-21 21:07:59,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:07:59,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:59,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:07:59,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:07:59,115 INFO L87 Difference]: Start difference. First operand 1544 states and 5303 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:59,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:59,290 INFO L93 Difference]: Finished difference Result 4383 states and 14962 transitions. [2021-05-21 21:07:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:07:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:07:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:59,297 INFO L225 Difference]: With dead ends: 4383 [2021-05-21 21:07:59,298 INFO L226 Difference]: Without dead ends: 4383 [2021-05-21 21:07:59,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:07:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4383 states. [2021-05-21 21:07:59,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4383 to 2776. [2021-05-21 21:07:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2775 states have (on average 3.546666666666667) internal successors, (9842), 2775 states have internal predecessors, (9842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 9842 transitions. [2021-05-21 21:07:59,352 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 9842 transitions. Word has length 23 [2021-05-21 21:07:59,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:59,352 INFO L482 AbstractCegarLoop]: Abstraction has 2776 states and 9842 transitions. [2021-05-21 21:07:59,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 9842 transitions. [2021-05-21 21:07:59,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:07:59,357 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:59,357 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:59,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:59,569 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:59,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:59,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1351897977, now seen corresponding path program 1 times [2021-05-21 21:07:59,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:59,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373451452] [2021-05-21 21:07:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:59,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:59,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:59,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373451452] [2021-05-21 21:07:59,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373451452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:59,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684978148] [2021-05-21 21:07:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-21 21:07:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:59,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:07:59,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:59,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684978148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:59,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:59,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 21:07:59,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669128715] [2021-05-21 21:07:59,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:07:59,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:59,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:07:59,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:07:59,673 INFO L87 Difference]: Start difference. First operand 2776 states and 9842 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-05-21 21:07:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:07:59,822 INFO L93 Difference]: Finished difference Result 6576 states and 23416 transitions. [2021-05-21 21:07:59,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:07:59,823 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 23 [2021-05-21 21:07:59,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:07:59,851 INFO L225 Difference]: With dead ends: 6576 [2021-05-21 21:07:59,851 INFO L226 Difference]: Without dead ends: 6576 [2021-05-21 21:07:59,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:07:59,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2021-05-21 21:07:59,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 4642. [2021-05-21 21:07:59,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 4641 states have (on average 3.6181857358327947) internal successors, (16792), 4641 states have internal predecessors, (16792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 16792 transitions. [2021-05-21 21:07:59,927 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 16792 transitions. Word has length 23 [2021-05-21 21:07:59,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:59,927 INFO L482 AbstractCegarLoop]: Abstraction has 4642 states and 16792 transitions. [2021-05-21 21:07:59,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-05-21 21:07:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 16792 transitions. [2021-05-21 21:07:59,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:07:59,933 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:59,933 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:00,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-21 21:08:00,148 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:00,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1067499911, now seen corresponding path program 11 times [2021-05-21 21:08:00,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:00,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024382699] [2021-05-21 21:08:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:00,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:00,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024382699] [2021-05-21 21:08:00,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024382699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:00,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108973411] [2021-05-21 21:08:00,170 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 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 [2021-05-21 21:08:00,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:08:00,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:00,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:00,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:00,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108973411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:00,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:00,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 21:08:00,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631001990] [2021-05-21 21:08:00,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:00,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:00,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:00,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:00,264 INFO L87 Difference]: Start difference. First operand 4642 states and 16792 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-05-21 21:08:00,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:00,428 INFO L93 Difference]: Finished difference Result 6297 states and 22107 transitions. [2021-05-21 21:08:00,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:08:00,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 23 [2021-05-21 21:08:00,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:00,437 INFO L225 Difference]: With dead ends: 6297 [2021-05-21 21:08:00,438 INFO L226 Difference]: Without dead ends: 6289 [2021-05-21 21:08:00,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:08:00,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6289 states. [2021-05-21 21:08:00,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6289 to 5484. [2021-05-21 21:08:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5484 states, 5483 states have (on average 3.6122560641984314) internal successors, (19806), 5483 states have internal predecessors, (19806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:00,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5484 states to 5484 states and 19806 transitions. [2021-05-21 21:08:00,519 INFO L78 Accepts]: Start accepts. Automaton has 5484 states and 19806 transitions. Word has length 23 [2021-05-21 21:08:00,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:00,519 INFO L482 AbstractCegarLoop]: Abstraction has 5484 states and 19806 transitions. [2021-05-21 21:08:00,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-05-21 21:08:00,520 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states and 19806 transitions. [2021-05-21 21:08:00,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:00,528 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:00,528 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:00,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:00,729 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:00,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1815799673, now seen corresponding path program 2 times [2021-05-21 21:08:00,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:00,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021794485] [2021-05-21 21:08:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:00,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:00,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021794485] [2021-05-21 21:08:00,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021794485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:00,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104702469] [2021-05-21 21:08:00,756 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 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 [2021-05-21 21:08:00,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:08:00,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:00,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:00,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:00,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104702469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:00,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:00,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:08:00,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900264550] [2021-05-21 21:08:00,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:00,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:00,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:00,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:00,895 INFO L87 Difference]: Start difference. First operand 5484 states and 19806 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 21:08:01,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:01,061 INFO L93 Difference]: Finished difference Result 8906 states and 31694 transitions. [2021-05-21 21:08:01,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:08:01,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 23 [2021-05-21 21:08:01,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:01,076 INFO L225 Difference]: With dead ends: 8906 [2021-05-21 21:08:01,076 INFO L226 Difference]: Without dead ends: 8900 [2021-05-21 21:08:01,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:08:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-05-21 21:08:01,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 8072. [2021-05-21 21:08:01,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 3.62644034196506) internal successors, (29269), 8071 states have internal predecessors, (29269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:01,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 29269 transitions. [2021-05-21 21:08:01,209 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 29269 transitions. Word has length 23 [2021-05-21 21:08:01,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:01,209 INFO L482 AbstractCegarLoop]: Abstraction has 8072 states and 29269 transitions. [2021-05-21 21:08:01,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 21:08:01,209 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 29269 transitions. [2021-05-21 21:08:01,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:01,222 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:01,222 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:01,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-21 21:08:01,437 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:01,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:01,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1500610179, now seen corresponding path program 3 times [2021-05-21 21:08:01,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:01,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10841297] [2021-05-21 21:08:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:01,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:01,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10841297] [2021-05-21 21:08:01,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10841297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:01,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685665603] [2021-05-21 21:08:01,468 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 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 [2021-05-21 21:08:01,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:08:01,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:01,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:01,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:01,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685665603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:01,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:01,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:08:01,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318050635] [2021-05-21 21:08:01,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:01,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:01,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:01,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:01,542 INFO L87 Difference]: Start difference. First operand 8072 states and 29269 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 21:08:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:01,733 INFO L93 Difference]: Finished difference Result 12359 states and 43995 transitions. [2021-05-21 21:08:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:08:01,733 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 23 [2021-05-21 21:08:01,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:01,759 INFO L225 Difference]: With dead ends: 12359 [2021-05-21 21:08:01,759 INFO L226 Difference]: Without dead ends: 12359 [2021-05-21 21:08:01,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:08:01,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12359 states. [2021-05-21 21:08:01,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12359 to 11076. [2021-05-21 21:08:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11076 states, 11075 states have (on average 3.61941309255079) internal successors, (40085), 11075 states have internal predecessors, (40085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:01,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11076 states to 11076 states and 40085 transitions. [2021-05-21 21:08:01,963 INFO L78 Accepts]: Start accepts. Automaton has 11076 states and 40085 transitions. Word has length 23 [2021-05-21 21:08:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:01,963 INFO L482 AbstractCegarLoop]: Abstraction has 11076 states and 40085 transitions. [2021-05-21 21:08:01,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 21:08:01,963 INFO L276 IsEmpty]: Start isEmpty. Operand 11076 states and 40085 transitions. [2021-05-21 21:08:01,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:01,980 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:01,980 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:02,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:02,193 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:02,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:02,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1194375559, now seen corresponding path program 12 times [2021-05-21 21:08:02,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:02,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821134610] [2021-05-21 21:08:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:02,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:02,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821134610] [2021-05-21 21:08:02,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821134610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:02,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161014115] [2021-05-21 21:08:02,213 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 [2021-05-21 21:08:02,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:08:02,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:02,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:02,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:02,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161014115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:02,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:02,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 21:08:02,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615220585] [2021-05-21 21:08:02,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:02,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:02,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:02,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:02,291 INFO L87 Difference]: Start difference. First operand 11076 states and 40085 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-05-21 21:08:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:02,457 INFO L93 Difference]: Finished difference Result 11482 states and 41093 transitions. [2021-05-21 21:08:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:08:02,458 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 23 [2021-05-21 21:08:02,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:02,520 INFO L225 Difference]: With dead ends: 11482 [2021-05-21 21:08:02,521 INFO L226 Difference]: Without dead ends: 11472 [2021-05-21 21:08:02,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:08:02,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11472 states. [2021-05-21 21:08:02,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11472 to 11074. [2021-05-21 21:08:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11074 states, 11073 states have (on average 3.6193443511243566) internal successors, (40077), 11073 states have internal predecessors, (40077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:02,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11074 states to 11074 states and 40077 transitions. [2021-05-21 21:08:02,683 INFO L78 Accepts]: Start accepts. Automaton has 11074 states and 40077 transitions. Word has length 23 [2021-05-21 21:08:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:02,683 INFO L482 AbstractCegarLoop]: Abstraction has 11074 states and 40077 transitions. [2021-05-21 21:08:02,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-05-21 21:08:02,683 INFO L276 IsEmpty]: Start isEmpty. Operand 11074 states and 40077 transitions. [2021-05-21 21:08:02,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:02,699 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:02,699 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:02,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-21 21:08:02,915 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:02,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:02,915 INFO L82 PathProgramCache]: Analyzing trace with hash 713885521, now seen corresponding path program 4 times [2021-05-21 21:08:02,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:02,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168881653] [2021-05-21 21:08:02,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:03,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:03,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168881653] [2021-05-21 21:08:03,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168881653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:03,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605830482] [2021-05-21 21:08:03,005 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 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 [2021-05-21 21:08:03,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:08:03,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:03,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:03,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:03,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605830482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:03,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:03,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:08:03,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500632502] [2021-05-21 21:08:03,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:03,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:03,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:03,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:03,110 INFO L87 Difference]: Start difference. First operand 11074 states and 40077 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:03,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:03,321 INFO L93 Difference]: Finished difference Result 16493 states and 59103 transitions. [2021-05-21 21:08:03,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:08:03,321 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:03,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:03,356 INFO L225 Difference]: With dead ends: 16493 [2021-05-21 21:08:03,356 INFO L226 Difference]: Without dead ends: 16493 [2021-05-21 21:08:03,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:08:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16493 states. [2021-05-21 21:08:03,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16493 to 7965. [2021-05-21 21:08:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7965 states, 7964 states have (on average 3.605474635861376) internal successors, (28714), 7964 states have internal predecessors, (28714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:03,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 28714 transitions. [2021-05-21 21:08:03,530 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 28714 transitions. Word has length 23 [2021-05-21 21:08:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:03,530 INFO L482 AbstractCegarLoop]: Abstraction has 7965 states and 28714 transitions. [2021-05-21 21:08:03,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:03,530 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 28714 transitions. [2021-05-21 21:08:03,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:03,542 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:03,542 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:03,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 21:08:03,757 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:03,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:03,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1264317309, now seen corresponding path program 13 times [2021-05-21 21:08:03,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:03,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863999528] [2021-05-21 21:08:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:03,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:03,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863999528] [2021-05-21 21:08:03,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863999528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:03,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887690696] [2021-05-21 21:08:03,781 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 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 [2021-05-21 21:08:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:03,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:03,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:03,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887690696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:03,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:03,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 21:08:03,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111617024] [2021-05-21 21:08:03,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:03,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:03,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:03,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:03,880 INFO L87 Difference]: Start difference. First operand 7965 states and 28714 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:04,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:04,069 INFO L93 Difference]: Finished difference Result 8444 states and 29934 transitions. [2021-05-21 21:08:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:08:04,070 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:04,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:04,082 INFO L225 Difference]: With dead ends: 8444 [2021-05-21 21:08:04,083 INFO L226 Difference]: Without dead ends: 8414 [2021-05-21 21:08:04,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:08:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8414 states. [2021-05-21 21:08:04,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8414 to 7984. [2021-05-21 21:08:04,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7984 states, 7983 states have (on average 3.5968933984717526) internal successors, (28714), 7983 states have internal predecessors, (28714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:04,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7984 states to 7984 states and 28714 transitions. [2021-05-21 21:08:04,208 INFO L78 Accepts]: Start accepts. Automaton has 7984 states and 28714 transitions. Word has length 23 [2021-05-21 21:08:04,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:04,208 INFO L482 AbstractCegarLoop]: Abstraction has 7984 states and 28714 transitions. [2021-05-21 21:08:04,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 7984 states and 28714 transitions. [2021-05-21 21:08:04,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:04,219 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:04,219 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:04,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 21:08:04,419 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:04,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:04,420 INFO L82 PathProgramCache]: Analyzing trace with hash -541652355, now seen corresponding path program 14 times [2021-05-21 21:08:04,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:04,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191207684] [2021-05-21 21:08:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:04,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:04,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191207684] [2021-05-21 21:08:04,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191207684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:04,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399189005] [2021-05-21 21:08:04,449 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 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 [2021-05-21 21:08:04,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:08:04,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:04,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:04,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:04,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399189005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:04,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:04,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-21 21:08:04,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024119006] [2021-05-21 21:08:04,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:08:04,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:04,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:08:04,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:08:04,525 INFO L87 Difference]: Start difference. First operand 7984 states and 28714 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) [2021-05-21 21:08:04,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:04,718 INFO L93 Difference]: Finished difference Result 8606 states and 30521 transitions. [2021-05-21 21:08:04,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:08:04,719 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 23 [2021-05-21 21:08:04,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:04,731 INFO L225 Difference]: With dead ends: 8606 [2021-05-21 21:08:04,732 INFO L226 Difference]: Without dead ends: 8543 [2021-05-21 21:08:04,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:08:04,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8543 states. [2021-05-21 21:08:04,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8543 to 8052. [2021-05-21 21:08:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8052 states, 8051 states have (on average 3.5914793193392125) internal successors, (28915), 8051 states have internal predecessors, (28915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8052 states to 8052 states and 28915 transitions. [2021-05-21 21:08:04,852 INFO L78 Accepts]: Start accepts. Automaton has 8052 states and 28915 transitions. Word has length 23 [2021-05-21 21:08:04,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:04,852 INFO L482 AbstractCegarLoop]: Abstraction has 8052 states and 28915 transitions. [2021-05-21 21:08:04,852 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) [2021-05-21 21:08:04,852 INFO L276 IsEmpty]: Start isEmpty. Operand 8052 states and 28915 transitions. [2021-05-21 21:08:04,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:04,863 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:04,863 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:05,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 21:08:05,079 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:05,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:05,079 INFO L82 PathProgramCache]: Analyzing trace with hash 732469559, now seen corresponding path program 5 times [2021-05-21 21:08:05,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:05,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439161766] [2021-05-21 21:08:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:05,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:05,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439161766] [2021-05-21 21:08:05,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439161766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:05,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118931275] [2021-05-21 21:08:05,133 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 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 [2021-05-21 21:08:05,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:08:05,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:05,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:05,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:05,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118931275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:05,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:05,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:08:05,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800786384] [2021-05-21 21:08:05,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:08:05,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:05,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:08:05,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:08:05,238 INFO L87 Difference]: Start difference. First operand 8052 states and 28915 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:05,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:05,402 INFO L93 Difference]: Finished difference Result 8205 states and 29288 transitions. [2021-05-21 21:08:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:08:05,403 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:05,415 INFO L225 Difference]: With dead ends: 8205 [2021-05-21 21:08:05,415 INFO L226 Difference]: Without dead ends: 8172 [2021-05-21 21:08:05,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:08:05,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8172 states. [2021-05-21 21:08:05,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8172 to 8077. [2021-05-21 21:08:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8077 states, 8076 states have (on average 3.5898959881129273) internal successors, (28992), 8076 states have internal predecessors, (28992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8077 states to 8077 states and 28992 transitions. [2021-05-21 21:08:05,527 INFO L78 Accepts]: Start accepts. Automaton has 8077 states and 28992 transitions. Word has length 23 [2021-05-21 21:08:05,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:05,527 INFO L482 AbstractCegarLoop]: Abstraction has 8077 states and 28992 transitions. [2021-05-21 21:08:05,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:05,527 INFO L276 IsEmpty]: Start isEmpty. Operand 8077 states and 28992 transitions. [2021-05-21 21:08:05,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:05,538 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:05,538 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:05,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 21:08:05,738 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:05,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:05,739 INFO L82 PathProgramCache]: Analyzing trace with hash -66570445, now seen corresponding path program 6 times [2021-05-21 21:08:05,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:05,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201388493] [2021-05-21 21:08:05,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:05,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:05,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201388493] [2021-05-21 21:08:05,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201388493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:05,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563208175] [2021-05-21 21:08:05,787 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 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 [2021-05-21 21:08:05,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:08:05,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:05,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:05,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:05,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563208175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:05,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:05,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 21:08:05,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672905010] [2021-05-21 21:08:05,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:08:05,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:05,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:08:05,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:08:05,921 INFO L87 Difference]: Start difference. First operand 8077 states and 28992 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:06,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:06,067 INFO L93 Difference]: Finished difference Result 10295 states and 36666 transitions. [2021-05-21 21:08:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:08:06,068 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:06,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:06,086 INFO L225 Difference]: With dead ends: 10295 [2021-05-21 21:08:06,086 INFO L226 Difference]: Without dead ends: 10247 [2021-05-21 21:08:06,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:08:06,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2021-05-21 21:08:06,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 8072. [2021-05-21 21:08:06,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 3.5903853301945237) internal successors, (28978), 8071 states have internal predecessors, (28978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 28978 transitions. [2021-05-21 21:08:06,248 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 28978 transitions. Word has length 23 [2021-05-21 21:08:06,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:06,248 INFO L482 AbstractCegarLoop]: Abstraction has 8072 states and 28978 transitions. [2021-05-21 21:08:06,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 28978 transitions. [2021-05-21 21:08:06,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:06,258 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:06,258 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:06,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-21 21:08:06,458 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:06,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:06,459 INFO L82 PathProgramCache]: Analyzing trace with hash -147969501, now seen corresponding path program 7 times [2021-05-21 21:08:06,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:06,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415052275] [2021-05-21 21:08:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:06,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:06,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415052275] [2021-05-21 21:08:06,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415052275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:06,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275047904] [2021-05-21 21:08:06,513 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 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 [2021-05-21 21:08:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:06,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:06,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:06,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275047904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:06,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:06,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 21:08:06,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866451899] [2021-05-21 21:08:06,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:08:06,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:06,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:08:06,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:08:06,630 INFO L87 Difference]: Start difference. First operand 8072 states and 28978 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:06,857 INFO L93 Difference]: Finished difference Result 10743 states and 38081 transitions. [2021-05-21 21:08:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:08:06,858 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:06,876 INFO L225 Difference]: With dead ends: 10743 [2021-05-21 21:08:06,876 INFO L226 Difference]: Without dead ends: 10695 [2021-05-21 21:08:06,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:08:06,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10695 states. [2021-05-21 21:08:07,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10695 to 8069. [2021-05-21 21:08:07,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8069 states, 8068 states have (on average 3.5909766980664353) internal successors, (28972), 8068 states have internal predecessors, (28972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:07,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8069 states to 8069 states and 28972 transitions. [2021-05-21 21:08:07,047 INFO L78 Accepts]: Start accepts. Automaton has 8069 states and 28972 transitions. Word has length 23 [2021-05-21 21:08:07,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:07,047 INFO L482 AbstractCegarLoop]: Abstraction has 8069 states and 28972 transitions. [2021-05-21 21:08:07,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:07,047 INFO L276 IsEmpty]: Start isEmpty. Operand 8069 states and 28972 transitions. [2021-05-21 21:08:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:07,057 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:07,057 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:07,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-21 21:08:07,270 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:07,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:07,270 INFO L82 PathProgramCache]: Analyzing trace with hash 265646431, now seen corresponding path program 8 times [2021-05-21 21:08:07,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:07,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361533460] [2021-05-21 21:08:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:07,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:07,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361533460] [2021-05-21 21:08:07,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361533460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:07,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406691326] [2021-05-21 21:08:07,332 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 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 [2021-05-21 21:08:07,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:08:07,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:07,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:07,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:07,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406691326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:07,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:07,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 21:08:07,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902758988] [2021-05-21 21:08:07,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:08:07,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:07,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:08:07,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:08:07,472 INFO L87 Difference]: Start difference. First operand 8069 states and 28972 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:07,746 INFO L93 Difference]: Finished difference Result 10785 states and 38212 transitions. [2021-05-21 21:08:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:08:07,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:07,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:07,768 INFO L225 Difference]: With dead ends: 10785 [2021-05-21 21:08:07,768 INFO L226 Difference]: Without dead ends: 10737 [2021-05-21 21:08:07,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:08:07,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10737 states. [2021-05-21 21:08:07,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10737 to 8068. [2021-05-21 21:08:07,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8068 states, 8067 states have (on average 3.591421842072642) internal successors, (28972), 8067 states have internal predecessors, (28972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:07,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8068 states to 8068 states and 28972 transitions. [2021-05-21 21:08:07,912 INFO L78 Accepts]: Start accepts. Automaton has 8068 states and 28972 transitions. Word has length 23 [2021-05-21 21:08:07,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:07,913 INFO L482 AbstractCegarLoop]: Abstraction has 8068 states and 28972 transitions. [2021-05-21 21:08:07,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 8068 states and 28972 transitions. [2021-05-21 21:08:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:07,924 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:07,924 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:08,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-21 21:08:08,137 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:08,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:08,137 INFO L82 PathProgramCache]: Analyzing trace with hash -418348287, now seen corresponding path program 9 times [2021-05-21 21:08:08,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:08,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33958323] [2021-05-21 21:08:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:08,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:08,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33958323] [2021-05-21 21:08:08,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33958323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:08,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105281640] [2021-05-21 21:08:08,188 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 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 [2021-05-21 21:08:08,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:08:08,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:08,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:08,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:08,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105281640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:08,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:08,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:08:08,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499448609] [2021-05-21 21:08:08,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:08,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:08,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:08,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:08,293 INFO L87 Difference]: Start difference. First operand 8068 states and 28972 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:08,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:08,483 INFO L93 Difference]: Finished difference Result 8314 states and 29600 transitions. [2021-05-21 21:08:08,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:08:08,484 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:08,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:08,495 INFO L225 Difference]: With dead ends: 8314 [2021-05-21 21:08:08,496 INFO L226 Difference]: Without dead ends: 8255 [2021-05-21 21:08:08,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:08:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2021-05-21 21:08:08,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 8137. [2021-05-21 21:08:08,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8137 states, 8136 states have (on average 3.587266470009833) internal successors, (29186), 8136 states have internal predecessors, (29186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8137 states to 8137 states and 29186 transitions. [2021-05-21 21:08:08,598 INFO L78 Accepts]: Start accepts. Automaton has 8137 states and 29186 transitions. Word has length 23 [2021-05-21 21:08:08,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:08,598 INFO L482 AbstractCegarLoop]: Abstraction has 8137 states and 29186 transitions. [2021-05-21 21:08:08,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:08,598 INFO L276 IsEmpty]: Start isEmpty. Operand 8137 states and 29186 transitions. [2021-05-21 21:08:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:08,610 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:08,610 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:08,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-21 21:08:08,825 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:08,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:08,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1217388291, now seen corresponding path program 10 times [2021-05-21 21:08:08,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:08,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107506661] [2021-05-21 21:08:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:08,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:08,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107506661] [2021-05-21 21:08:08,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107506661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:08,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225636567] [2021-05-21 21:08:08,873 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 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 [2021-05-21 21:08:08,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:08:08,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:08,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:08,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:08,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225636567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:08,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:08,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:08:08,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662540681] [2021-05-21 21:08:08,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:08:08,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:08,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:08:08,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:08:08,986 INFO L87 Difference]: Start difference. First operand 8137 states and 29186 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:09,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:09,127 INFO L93 Difference]: Finished difference Result 10367 states and 36899 transitions. [2021-05-21 21:08:09,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:08:09,127 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:09,143 INFO L225 Difference]: With dead ends: 10367 [2021-05-21 21:08:09,143 INFO L226 Difference]: Without dead ends: 10321 [2021-05-21 21:08:09,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:08:09,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10321 states. [2021-05-21 21:08:09,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10321 to 8140. [2021-05-21 21:08:09,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8140 states, 8139 states have (on average 3.5897530409141174) internal successors, (29217), 8139 states have internal predecessors, (29217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:09,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8140 states to 8140 states and 29217 transitions. [2021-05-21 21:08:09,262 INFO L78 Accepts]: Start accepts. Automaton has 8140 states and 29217 transitions. Word has length 23 [2021-05-21 21:08:09,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:09,262 INFO L482 AbstractCegarLoop]: Abstraction has 8140 states and 29217 transitions. [2021-05-21 21:08:09,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 8140 states and 29217 transitions. [2021-05-21 21:08:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:09,272 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:09,272 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:09,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:09,473 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:09,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:09,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1298787347, now seen corresponding path program 11 times [2021-05-21 21:08:09,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:09,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159144792] [2021-05-21 21:08:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:09,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:09,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159144792] [2021-05-21 21:08:09,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159144792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:09,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621884506] [2021-05-21 21:08:09,524 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 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 [2021-05-21 21:08:09,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:08:09,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:09,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:09,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:09,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621884506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:09,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:09,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 21:08:09,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787094221] [2021-05-21 21:08:09,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:08:09,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:09,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:08:09,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:08:09,644 INFO L87 Difference]: Start difference. First operand 8140 states and 29217 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:09,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:09,885 INFO L93 Difference]: Finished difference Result 10852 states and 38322 transitions. [2021-05-21 21:08:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:08:09,885 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:09,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:09,902 INFO L225 Difference]: With dead ends: 10852 [2021-05-21 21:08:09,903 INFO L226 Difference]: Without dead ends: 10785 [2021-05-21 21:08:09,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:08:09,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10785 states. [2021-05-21 21:08:10,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10785 to 8157. [2021-05-21 21:08:10,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8157 states, 8156 states have (on average 3.5922020598332516) internal successors, (29298), 8156 states have internal predecessors, (29298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:10,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8157 states to 8157 states and 29298 transitions. [2021-05-21 21:08:10,041 INFO L78 Accepts]: Start accepts. Automaton has 8157 states and 29298 transitions. Word has length 23 [2021-05-21 21:08:10,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:10,042 INFO L482 AbstractCegarLoop]: Abstraction has 8157 states and 29298 transitions. [2021-05-21 21:08:10,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:10,042 INFO L276 IsEmpty]: Start isEmpty. Operand 8157 states and 29298 transitions. [2021-05-21 21:08:10,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:10,053 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:10,053 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:10,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-21 21:08:10,253 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:10,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:10,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1071003837, now seen corresponding path program 12 times [2021-05-21 21:08:10,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:10,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135340164] [2021-05-21 21:08:10,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:10,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:10,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135340164] [2021-05-21 21:08:10,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135340164] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:10,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080763213] [2021-05-21 21:08:10,314 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 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 [2021-05-21 21:08:10,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:08:10,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:10,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:10,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:10,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080763213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:10,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:10,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:08:10,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596532054] [2021-05-21 21:08:10,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:10,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:10,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:10,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:10,410 INFO L87 Difference]: Start difference. First operand 8157 states and 29298 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:10,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:10,557 INFO L93 Difference]: Finished difference Result 8303 states and 29650 transitions. [2021-05-21 21:08:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:08:10,557 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:10,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:10,570 INFO L225 Difference]: With dead ends: 8303 [2021-05-21 21:08:10,571 INFO L226 Difference]: Without dead ends: 8248 [2021-05-21 21:08:10,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:08:10,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8248 states. [2021-05-21 21:08:10,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8248 to 8175. [2021-05-21 21:08:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8175 states, 8174 states have (on average 3.5910203082945924) internal successors, (29353), 8174 states have internal predecessors, (29353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:10,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8175 states to 8175 states and 29353 transitions. [2021-05-21 21:08:10,683 INFO L78 Accepts]: Start accepts. Automaton has 8175 states and 29353 transitions. Word has length 23 [2021-05-21 21:08:10,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:10,683 INFO L482 AbstractCegarLoop]: Abstraction has 8175 states and 29353 transitions. [2021-05-21 21:08:10,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:10,683 INFO L276 IsEmpty]: Start isEmpty. Operand 8175 states and 29353 transitions. [2021-05-21 21:08:10,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:10,693 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:10,693 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:10,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:10,894 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:10,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:10,894 INFO L82 PathProgramCache]: Analyzing trace with hash 271963833, now seen corresponding path program 13 times [2021-05-21 21:08:10,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:10,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889862408] [2021-05-21 21:08:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:10,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:10,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889862408] [2021-05-21 21:08:10,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889862408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:10,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398827193] [2021-05-21 21:08:10,960 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 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 [2021-05-21 21:08:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:10,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:10,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:11,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398827193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:11,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:11,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:08:11,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206783449] [2021-05-21 21:08:11,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:11,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:11,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:11,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:11,052 INFO L87 Difference]: Start difference. First operand 8175 states and 29353 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 21:08:11,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:11,206 INFO L93 Difference]: Finished difference Result 10332 states and 36818 transitions. [2021-05-21 21:08:11,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:08:11,206 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 23 [2021-05-21 21:08:11,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:11,222 INFO L225 Difference]: With dead ends: 10332 [2021-05-21 21:08:11,222 INFO L226 Difference]: Without dead ends: 10286 [2021-05-21 21:08:11,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:08:11,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10286 states. [2021-05-21 21:08:11,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10286 to 8171. [2021-05-21 21:08:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8171 states, 8170 states have (on average 3.591309669522644) internal successors, (29341), 8170 states have internal predecessors, (29341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:11,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 29341 transitions. [2021-05-21 21:08:11,371 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 29341 transitions. Word has length 23 [2021-05-21 21:08:11,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:11,371 INFO L482 AbstractCegarLoop]: Abstraction has 8171 states and 29341 transitions. [2021-05-21 21:08:11,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 21:08:11,371 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 29341 transitions. [2021-05-21 21:08:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:11,381 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:11,381 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:11,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-21 21:08:11,581 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:11,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:11,582 INFO L82 PathProgramCache]: Analyzing trace with hash 11839967, now seen corresponding path program 14 times [2021-05-21 21:08:11,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:11,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510827869] [2021-05-21 21:08:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:11,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:11,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510827869] [2021-05-21 21:08:11,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510827869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:11,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545132723] [2021-05-21 21:08:11,649 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 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 [2021-05-21 21:08:11,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:08:11,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:11,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:11,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:11,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545132723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:11,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:11,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:08:11,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260334451] [2021-05-21 21:08:11,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:11,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:11,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:11,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:11,727 INFO L87 Difference]: Start difference. First operand 8171 states and 29341 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-05-21 21:08:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:11,858 INFO L93 Difference]: Finished difference Result 8275 states and 29573 transitions. [2021-05-21 21:08:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:08:11,859 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 23 [2021-05-21 21:08:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:11,871 INFO L225 Difference]: With dead ends: 8275 [2021-05-21 21:08:11,871 INFO L226 Difference]: Without dead ends: 8232 [2021-05-21 21:08:11,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:08:11,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8232 states. [2021-05-21 21:08:11,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8232 to 8175. [2021-05-21 21:08:11,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8175 states, 8174 states have (on average 3.5902862735502814) internal successors, (29347), 8174 states have internal predecessors, (29347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:11,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8175 states to 8175 states and 29347 transitions. [2021-05-21 21:08:11,977 INFO L78 Accepts]: Start accepts. Automaton has 8175 states and 29347 transitions. Word has length 23 [2021-05-21 21:08:11,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:11,977 INFO L482 AbstractCegarLoop]: Abstraction has 8175 states and 29347 transitions. [2021-05-21 21:08:11,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-05-21 21:08:11,978 INFO L276 IsEmpty]: Start isEmpty. Operand 8175 states and 29347 transitions. [2021-05-21 21:08:11,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:11,987 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:11,988 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:12,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-05-21 21:08:12,188 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:12,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:12,189 INFO L82 PathProgramCache]: Analyzing trace with hash 33595821, now seen corresponding path program 15 times [2021-05-21 21:08:12,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:12,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251123471] [2021-05-21 21:08:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:12,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:12,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251123471] [2021-05-21 21:08:12,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251123471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:12,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270730168] [2021-05-21 21:08:12,230 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 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 [2021-05-21 21:08:12,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:08:12,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:12,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:08:12,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:12,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270730168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:12,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:12,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:08:12,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004907330] [2021-05-21 21:08:12,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:12,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:12,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:12,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:12,290 INFO L87 Difference]: Start difference. First operand 8175 states and 29347 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-05-21 21:08:12,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:12,441 INFO L93 Difference]: Finished difference Result 10463 states and 37022 transitions. [2021-05-21 21:08:12,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:08:12,442 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 23 [2021-05-21 21:08:12,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:12,457 INFO L225 Difference]: With dead ends: 10463 [2021-05-21 21:08:12,458 INFO L226 Difference]: Without dead ends: 10463 [2021-05-21 21:08:12,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:08:12,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2021-05-21 21:08:12,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 8533. [2021-05-21 21:08:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8533 states, 8532 states have (on average 3.587318330989217) internal successors, (30607), 8532 states have internal predecessors, (30607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:12,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8533 states to 8533 states and 30607 transitions. [2021-05-21 21:08:12,634 INFO L78 Accepts]: Start accepts. Automaton has 8533 states and 30607 transitions. Word has length 23 [2021-05-21 21:08:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:12,635 INFO L482 AbstractCegarLoop]: Abstraction has 8533 states and 30607 transitions. [2021-05-21 21:08:12,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-05-21 21:08:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 8533 states and 30607 transitions. [2021-05-21 21:08:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:12,645 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:12,645 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:12,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:12,849 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:12,849 INFO L82 PathProgramCache]: Analyzing trace with hash -108973523, now seen corresponding path program 16 times [2021-05-21 21:08:12,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:12,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537217039] [2021-05-21 21:08:12,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:12,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:12,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537217039] [2021-05-21 21:08:12,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537217039] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:12,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578642318] [2021-05-21 21:08:12,892 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 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 [2021-05-21 21:08:12,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:08:12,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:12,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:08:12,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:12,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578642318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:12,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:12,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:08:12,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116333439] [2021-05-21 21:08:12,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:12,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:12,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:12,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:12,971 INFO L87 Difference]: Start difference. First operand 8533 states and 30607 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:13,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:13,195 INFO L93 Difference]: Finished difference Result 18599 states and 66456 transitions. [2021-05-21 21:08:13,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:08:13,195 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:13,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:13,230 INFO L225 Difference]: With dead ends: 18599 [2021-05-21 21:08:13,230 INFO L226 Difference]: Without dead ends: 18599 [2021-05-21 21:08:13,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:08:13,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18599 states. [2021-05-21 21:08:13,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18599 to 14058. [2021-05-21 21:08:13,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14058 states, 14057 states have (on average 3.598634132460696) internal successors, (50586), 14057 states have internal predecessors, (50586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14058 states to 14058 states and 50586 transitions. [2021-05-21 21:08:13,517 INFO L78 Accepts]: Start accepts. Automaton has 14058 states and 50586 transitions. Word has length 23 [2021-05-21 21:08:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:13,517 INFO L482 AbstractCegarLoop]: Abstraction has 14058 states and 50586 transitions. [2021-05-21 21:08:13,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:13,518 INFO L276 IsEmpty]: Start isEmpty. Operand 14058 states and 50586 transitions. [2021-05-21 21:08:13,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:13,533 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:13,533 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:13,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-05-21 21:08:13,733 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:13,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:13,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1805708085, now seen corresponding path program 17 times [2021-05-21 21:08:13,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:13,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691681809] [2021-05-21 21:08:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:13,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:13,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691681809] [2021-05-21 21:08:13,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691681809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:13,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41318698] [2021-05-21 21:08:13,783 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 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 [2021-05-21 21:08:13,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:08:13,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:13,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:08:13,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:13,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41318698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:13,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:13,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:08:13,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134398044] [2021-05-21 21:08:13,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:13,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:13,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:13,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:13,853 INFO L87 Difference]: Start difference. First operand 14058 states and 50586 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-05-21 21:08:14,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:14,030 INFO L93 Difference]: Finished difference Result 14997 states and 53374 transitions. [2021-05-21 21:08:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:08:14,030 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 23 [2021-05-21 21:08:14,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:14,056 INFO L225 Difference]: With dead ends: 14997 [2021-05-21 21:08:14,056 INFO L226 Difference]: Without dead ends: 14997 [2021-05-21 21:08:14,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:08:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14997 states. [2021-05-21 21:08:14,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14997 to 14058. [2021-05-21 21:08:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14058 states, 14057 states have (on average 3.598634132460696) internal successors, (50586), 14057 states have internal predecessors, (50586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14058 states to 14058 states and 50586 transitions. [2021-05-21 21:08:14,259 INFO L78 Accepts]: Start accepts. Automaton has 14058 states and 50586 transitions. Word has length 23 [2021-05-21 21:08:14,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:14,259 INFO L482 AbstractCegarLoop]: Abstraction has 14058 states and 50586 transitions. [2021-05-21 21:08:14,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-05-21 21:08:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 14058 states and 50586 transitions. [2021-05-21 21:08:14,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:14,274 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:14,274 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:14,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:14,475 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:14,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1550642503, now seen corresponding path program 18 times [2021-05-21 21:08:14,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:14,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634908432] [2021-05-21 21:08:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:14,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:14,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634908432] [2021-05-21 21:08:14,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634908432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:14,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195084298] [2021-05-21 21:08:14,523 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 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 [2021-05-21 21:08:14,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:08:14,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:14,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:08:14,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:14,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195084298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:14,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:14,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:08:14,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448939910] [2021-05-21 21:08:14,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:08:14,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:14,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:08:14,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:08:14,688 INFO L87 Difference]: Start difference. First operand 14058 states and 50586 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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) [2021-05-21 21:08:14,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:14,959 INFO L93 Difference]: Finished difference Result 25256 states and 90164 transitions. [2021-05-21 21:08:14,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:08:14,960 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 23 [2021-05-21 21:08:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:15,018 INFO L225 Difference]: With dead ends: 25256 [2021-05-21 21:08:15,019 INFO L226 Difference]: Without dead ends: 25256 [2021-05-21 21:08:15,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:08:15,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25256 states. [2021-05-21 21:08:15,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25256 to 14108. [2021-05-21 21:08:15,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14108 states, 14107 states have (on average 3.5999149358474516) internal successors, (50784), 14107 states have internal predecessors, (50784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:15,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14108 states to 14108 states and 50784 transitions. [2021-05-21 21:08:15,303 INFO L78 Accepts]: Start accepts. Automaton has 14108 states and 50784 transitions. Word has length 23 [2021-05-21 21:08:15,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:15,303 INFO L482 AbstractCegarLoop]: Abstraction has 14108 states and 50784 transitions. [2021-05-21 21:08:15,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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) [2021-05-21 21:08:15,303 INFO L276 IsEmpty]: Start isEmpty. Operand 14108 states and 50784 transitions. [2021-05-21 21:08:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:15,319 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:15,319 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:15,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-21 21:08:15,534 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:15,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:15,534 INFO L82 PathProgramCache]: Analyzing trace with hash -530911043, now seen corresponding path program 19 times [2021-05-21 21:08:15,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:15,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813674517] [2021-05-21 21:08:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:15,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:15,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813674517] [2021-05-21 21:08:15,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813674517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:15,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010428869] [2021-05-21 21:08:15,568 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 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 [2021-05-21 21:08:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:15,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:08:15,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:15,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010428869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:15,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:15,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:08:15,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41936187] [2021-05-21 21:08:15,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:15,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:15,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:15,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:15,655 INFO L87 Difference]: Start difference. First operand 14108 states and 50784 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:15,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:15,872 INFO L93 Difference]: Finished difference Result 21867 states and 76984 transitions. [2021-05-21 21:08:15,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:08:15,872 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:15,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:15,910 INFO L225 Difference]: With dead ends: 21867 [2021-05-21 21:08:15,910 INFO L226 Difference]: Without dead ends: 21867 [2021-05-21 21:08:15,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:08:15,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21867 states. [2021-05-21 21:08:16,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21867 to 14162. [2021-05-21 21:08:16,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14162 states, 14161 states have (on average 3.599957630110868) internal successors, (50979), 14161 states have internal predecessors, (50979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:16,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14162 states to 14162 states and 50979 transitions. [2021-05-21 21:08:16,212 INFO L78 Accepts]: Start accepts. Automaton has 14162 states and 50979 transitions. Word has length 23 [2021-05-21 21:08:16,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:16,213 INFO L482 AbstractCegarLoop]: Abstraction has 14162 states and 50979 transitions. [2021-05-21 21:08:16,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:16,213 INFO L276 IsEmpty]: Start isEmpty. Operand 14162 states and 50979 transitions. [2021-05-21 21:08:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:16,227 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:16,228 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:16,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-21 21:08:16,428 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:16,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:16,428 INFO L82 PathProgramCache]: Analyzing trace with hash 851877945, now seen corresponding path program 20 times [2021-05-21 21:08:16,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:16,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198208667] [2021-05-21 21:08:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:16,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:16,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198208667] [2021-05-21 21:08:16,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198208667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:16,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340488812] [2021-05-21 21:08:16,466 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 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 [2021-05-21 21:08:16,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:08:16,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:16,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:08:16,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:16,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340488812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:16,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:16,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 21:08:16,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918024551] [2021-05-21 21:08:16,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:08:16,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:16,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:08:16,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:08:16,576 INFO L87 Difference]: Start difference. First operand 14162 states and 50979 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:16,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:16,884 INFO L93 Difference]: Finished difference Result 27150 states and 96606 transitions. [2021-05-21 21:08:16,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:08:16,885 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:16,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:16,941 INFO L225 Difference]: With dead ends: 27150 [2021-05-21 21:08:16,942 INFO L226 Difference]: Without dead ends: 27144 [2021-05-21 21:08:16,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=186, Invalid=320, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:08:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27144 states. [2021-05-21 21:08:17,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27144 to 14874. [2021-05-21 21:08:17,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14874 states, 14873 states have (on average 3.604921670140523) internal successors, (53616), 14873 states have internal predecessors, (53616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14874 states to 14874 states and 53616 transitions. [2021-05-21 21:08:17,248 INFO L78 Accepts]: Start accepts. Automaton has 14874 states and 53616 transitions. Word has length 23 [2021-05-21 21:08:17,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:17,249 INFO L482 AbstractCegarLoop]: Abstraction has 14874 states and 53616 transitions. [2021-05-21 21:08:17,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:17,249 INFO L276 IsEmpty]: Start isEmpty. Operand 14874 states and 53616 transitions. [2021-05-21 21:08:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:17,266 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:17,266 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:17,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:17,466 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:17,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:17,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1871609405, now seen corresponding path program 21 times [2021-05-21 21:08:17,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:17,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003685297] [2021-05-21 21:08:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:17,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:17,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003685297] [2021-05-21 21:08:17,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003685297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:17,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860516728] [2021-05-21 21:08:17,502 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 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 [2021-05-21 21:08:17,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:08:17,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:17,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:08:17,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:17,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860516728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:17,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:17,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:08:17,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481459127] [2021-05-21 21:08:17,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:08:17,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:17,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:08:17,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:08:17,620 INFO L87 Difference]: Start difference. First operand 14874 states and 53616 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:17,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:17,970 INFO L93 Difference]: Finished difference Result 22680 states and 79637 transitions. [2021-05-21 21:08:17,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:08:17,971 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:18,008 INFO L225 Difference]: With dead ends: 22680 [2021-05-21 21:08:18,008 INFO L226 Difference]: Without dead ends: 22680 [2021-05-21 21:08:18,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:08:18,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22680 states. [2021-05-21 21:08:18,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22680 to 14862. [2021-05-21 21:08:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14861 states have (on average 3.6048045219029676) internal successors, (53571), 14861 states have internal predecessors, (53571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 53571 transitions. [2021-05-21 21:08:18,271 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 53571 transitions. Word has length 23 [2021-05-21 21:08:18,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:18,271 INFO L482 AbstractCegarLoop]: Abstraction has 14862 states and 53571 transitions. [2021-05-21 21:08:18,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:18,271 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 53571 transitions. [2021-05-21 21:08:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:18,289 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:18,290 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:18,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-05-21 21:08:18,490 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:18,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:18,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1111272131, now seen corresponding path program 22 times [2021-05-21 21:08:18,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:18,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274641021] [2021-05-21 21:08:18,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:18,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:18,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274641021] [2021-05-21 21:08:18,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274641021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:18,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63115452] [2021-05-21 21:08:18,524 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 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 [2021-05-21 21:08:18,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:08:18,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:18,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:08:18,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:18,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63115452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:18,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:18,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:08:18,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929024542] [2021-05-21 21:08:18,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:18,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:18,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:18,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:18,604 INFO L87 Difference]: Start difference. First operand 14862 states and 53571 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:18,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:18,846 INFO L93 Difference]: Finished difference Result 19297 states and 68666 transitions. [2021-05-21 21:08:18,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:08:18,846 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:18,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:18,880 INFO L225 Difference]: With dead ends: 19297 [2021-05-21 21:08:18,880 INFO L226 Difference]: Without dead ends: 19297 [2021-05-21 21:08:18,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:08:18,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19297 states. [2021-05-21 21:08:19,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19297 to 14862. [2021-05-21 21:08:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14861 states have (on average 3.6048045219029676) internal successors, (53571), 14861 states have internal predecessors, (53571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 53571 transitions. [2021-05-21 21:08:19,134 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 53571 transitions. Word has length 23 [2021-05-21 21:08:19,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:19,135 INFO L482 AbstractCegarLoop]: Abstraction has 14862 states and 53571 transitions. [2021-05-21 21:08:19,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:19,135 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 53571 transitions. [2021-05-21 21:08:19,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:19,152 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:19,153 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:19,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-21 21:08:19,353 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:19,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:19,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1359329409, now seen corresponding path program 23 times [2021-05-21 21:08:19,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:19,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698438803] [2021-05-21 21:08:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:19,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:19,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698438803] [2021-05-21 21:08:19,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698438803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:19,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969721920] [2021-05-21 21:08:19,397 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 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 [2021-05-21 21:08:19,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:08:19,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:19,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:08:19,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:19,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969721920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:19,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:19,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:08:19,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125653367] [2021-05-21 21:08:19,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:19,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:19,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:19,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:19,499 INFO L87 Difference]: Start difference. First operand 14862 states and 53571 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:19,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:19,805 INFO L93 Difference]: Finished difference Result 33945 states and 122633 transitions. [2021-05-21 21:08:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:08:19,805 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:19,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:19,881 INFO L225 Difference]: With dead ends: 33945 [2021-05-21 21:08:19,881 INFO L226 Difference]: Without dead ends: 33935 [2021-05-21 21:08:19,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:08:19,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33935 states. [2021-05-21 21:08:20,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33935 to 26076. [2021-05-21 21:08:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26076 states, 26075 states have (on average 3.595091083413231) internal successors, (93742), 26075 states have internal predecessors, (93742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26076 states to 26076 states and 93742 transitions. [2021-05-21 21:08:20,462 INFO L78 Accepts]: Start accepts. Automaton has 26076 states and 93742 transitions. Word has length 23 [2021-05-21 21:08:20,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:20,462 INFO L482 AbstractCegarLoop]: Abstraction has 26076 states and 93742 transitions. [2021-05-21 21:08:20,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:20,463 INFO L276 IsEmpty]: Start isEmpty. Operand 26076 states and 93742 transitions. [2021-05-21 21:08:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:20,487 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:20,487 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:20,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-21 21:08:20,688 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:20,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:20,688 INFO L82 PathProgramCache]: Analyzing trace with hash -337405153, now seen corresponding path program 24 times [2021-05-21 21:08:20,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:20,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514651065] [2021-05-21 21:08:20,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:20,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:20,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514651065] [2021-05-21 21:08:20,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514651065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:20,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838086089] [2021-05-21 21:08:20,730 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 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 [2021-05-21 21:08:20,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:08:20,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:20,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:08:20,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:20,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838086089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:20,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:20,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:08:20,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99428705] [2021-05-21 21:08:20,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:20,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:20,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:20,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:20,815 INFO L87 Difference]: Start difference. First operand 26076 states and 93742 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-05-21 21:08:21,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:21,075 INFO L93 Difference]: Finished difference Result 26734 states and 95761 transitions. [2021-05-21 21:08:21,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:08:21,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 23 [2021-05-21 21:08:21,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:21,128 INFO L225 Difference]: With dead ends: 26734 [2021-05-21 21:08:21,128 INFO L226 Difference]: Without dead ends: 26734 [2021-05-21 21:08:21,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:08:21,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26734 states. [2021-05-21 21:08:21,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26734 to 26088. [2021-05-21 21:08:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26088 states, 26087 states have (on average 3.5951240081266533) internal successors, (93786), 26087 states have internal predecessors, (93786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26088 states to 26088 states and 93786 transitions. [2021-05-21 21:08:21,547 INFO L78 Accepts]: Start accepts. Automaton has 26088 states and 93786 transitions. Word has length 23 [2021-05-21 21:08:21,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:21,547 INFO L482 AbstractCegarLoop]: Abstraction has 26088 states and 93786 transitions. [2021-05-21 21:08:21,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-05-21 21:08:21,547 INFO L276 IsEmpty]: Start isEmpty. Operand 26088 states and 93786 transitions. [2021-05-21 21:08:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:21,571 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:21,571 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:21,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:21,772 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:21,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:21,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1911852527, now seen corresponding path program 15 times [2021-05-21 21:08:21,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:21,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530228639] [2021-05-21 21:08:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:21,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:21,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530228639] [2021-05-21 21:08:21,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530228639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:21,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12903135] [2021-05-21 21:08:21,810 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 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 [2021-05-21 21:08:21,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:08:21,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:21,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:21,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:21,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12903135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:21,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:21,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 21:08:21,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878110988] [2021-05-21 21:08:21,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:21,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:21,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:21,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:21,883 INFO L87 Difference]: Start difference. First operand 26088 states and 93786 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-05-21 21:08:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:22,169 INFO L93 Difference]: Finished difference Result 27275 states and 97322 transitions. [2021-05-21 21:08:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:08:22,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 23 [2021-05-21 21:08:22,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:22,223 INFO L225 Difference]: With dead ends: 27275 [2021-05-21 21:08:22,223 INFO L226 Difference]: Without dead ends: 27223 [2021-05-21 21:08:22,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:08:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27223 states. [2021-05-21 21:08:22,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27223 to 26365. [2021-05-21 21:08:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26365 states, 26364 states have (on average 3.5933469883174025) internal successors, (94735), 26364 states have internal predecessors, (94735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26365 states to 26365 states and 94735 transitions. [2021-05-21 21:08:22,674 INFO L78 Accepts]: Start accepts. Automaton has 26365 states and 94735 transitions. Word has length 23 [2021-05-21 21:08:22,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:22,674 INFO L482 AbstractCegarLoop]: Abstraction has 26365 states and 94735 transitions. [2021-05-21 21:08:22,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-05-21 21:08:22,674 INFO L276 IsEmpty]: Start isEmpty. Operand 26365 states and 94735 transitions. [2021-05-21 21:08:22,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:22,699 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:22,699 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:22,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:22,900 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:22,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:22,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1784976879, now seen corresponding path program 16 times [2021-05-21 21:08:22,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:22,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286802725] [2021-05-21 21:08:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:22,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:22,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286802725] [2021-05-21 21:08:22,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286802725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:22,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404826266] [2021-05-21 21:08:22,927 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:08:22,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:08:22,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:22,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:22,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:23,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404826266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:23,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:23,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 21:08:23,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509581585] [2021-05-21 21:08:23,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:23,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:23,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:23,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:23,004 INFO L87 Difference]: Start difference. First operand 26365 states and 94735 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-05-21 21:08:23,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:23,243 INFO L93 Difference]: Finished difference Result 26807 states and 95786 transitions. [2021-05-21 21:08:23,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:08:23,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 23 [2021-05-21 21:08:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:23,305 INFO L225 Difference]: With dead ends: 26807 [2021-05-21 21:08:23,305 INFO L226 Difference]: Without dead ends: 26797 [2021-05-21 21:08:23,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:08:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26797 states. [2021-05-21 21:08:23,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26797 to 26277. [2021-05-21 21:08:23,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26277 states, 26276 states have (on average 3.593811843507383) internal successors, (94431), 26276 states have internal predecessors, (94431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:23,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26277 states to 26277 states and 94431 transitions. [2021-05-21 21:08:23,762 INFO L78 Accepts]: Start accepts. Automaton has 26277 states and 94431 transitions. Word has length 23 [2021-05-21 21:08:23,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:23,762 INFO L482 AbstractCegarLoop]: Abstraction has 26277 states and 94431 transitions. [2021-05-21 21:08:23,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-05-21 21:08:23,762 INFO L276 IsEmpty]: Start isEmpty. Operand 26277 states and 94431 transitions. [2021-05-21 21:08:23,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:23,787 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:23,787 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:23,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:23,989 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:23,989 INFO L82 PathProgramCache]: Analyzing trace with hash -51297549, now seen corresponding path program 17 times [2021-05-21 21:08:23,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:23,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337126610] [2021-05-21 21:08:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:24,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:24,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337126610] [2021-05-21 21:08:24,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337126610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:24,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351832066] [2021-05-21 21:08:24,006 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 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 [2021-05-21 21:08:24,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:08:24,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:24,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:24,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:24,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351832066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:24,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:24,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 21:08:24,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674113737] [2021-05-21 21:08:24,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:24,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:24,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:24,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:24,149 INFO L87 Difference]: Start difference. First operand 26277 states and 94431 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:24,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:24,505 INFO L93 Difference]: Finished difference Result 26602 states and 95215 transitions. [2021-05-21 21:08:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:08:24,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:24,557 INFO L225 Difference]: With dead ends: 26602 [2021-05-21 21:08:24,557 INFO L226 Difference]: Without dead ends: 26542 [2021-05-21 21:08:24,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2021-05-21 21:08:24,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26542 states. [2021-05-21 21:08:24,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26542 to 26119. [2021-05-21 21:08:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26119 states, 26118 states have (on average 3.5962937437782374) internal successors, (93928), 26118 states have internal predecessors, (93928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26119 states to 26119 states and 93928 transitions. [2021-05-21 21:08:24,963 INFO L78 Accepts]: Start accepts. Automaton has 26119 states and 93928 transitions. Word has length 23 [2021-05-21 21:08:24,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:24,963 INFO L482 AbstractCegarLoop]: Abstraction has 26119 states and 93928 transitions. [2021-05-21 21:08:24,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:24,963 INFO L276 IsEmpty]: Start isEmpty. Operand 26119 states and 93928 transitions. [2021-05-21 21:08:24,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:24,986 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:24,986 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:25,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:25,187 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:25,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:25,187 INFO L82 PathProgramCache]: Analyzing trace with hash 837128115, now seen corresponding path program 18 times [2021-05-21 21:08:25,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:25,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369121769] [2021-05-21 21:08:25,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:25,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:25,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369121769] [2021-05-21 21:08:25,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369121769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:25,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108002104] [2021-05-21 21:08:25,214 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 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 [2021-05-21 21:08:25,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:08:25,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:25,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:25,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:25,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108002104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:25,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:25,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 21:08:25,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218103232] [2021-05-21 21:08:25,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:25,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:25,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:25,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:25,291 INFO L87 Difference]: Start difference. First operand 26119 states and 93928 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-05-21 21:08:25,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:25,516 INFO L93 Difference]: Finished difference Result 26987 states and 96631 transitions. [2021-05-21 21:08:25,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:08:25,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 23 [2021-05-21 21:08:25,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:25,569 INFO L225 Difference]: With dead ends: 26987 [2021-05-21 21:08:25,569 INFO L226 Difference]: Without dead ends: 26963 [2021-05-21 21:08:25,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:08:25,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26963 states. [2021-05-21 21:08:25,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26963 to 26267. [2021-05-21 21:08:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26267 states, 26266 states have (on average 3.5969694662301075) internal successors, (94478), 26266 states have internal predecessors, (94478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26267 states to 26267 states and 94478 transitions. [2021-05-21 21:08:26,008 INFO L78 Accepts]: Start accepts. Automaton has 26267 states and 94478 transitions. Word has length 23 [2021-05-21 21:08:26,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:26,008 INFO L482 AbstractCegarLoop]: Abstraction has 26267 states and 94478 transitions. [2021-05-21 21:08:26,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-05-21 21:08:26,008 INFO L276 IsEmpty]: Start isEmpty. Operand 26267 states and 94478 transitions. [2021-05-21 21:08:26,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:26,036 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:26,036 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:26,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-05-21 21:08:26,236 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:26,236 INFO L82 PathProgramCache]: Analyzing trace with hash 710252467, now seen corresponding path program 19 times [2021-05-21 21:08:26,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:26,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747056506] [2021-05-21 21:08:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:26,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:26,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747056506] [2021-05-21 21:08:26,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747056506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:26,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299440895] [2021-05-21 21:08:26,258 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 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 [2021-05-21 21:08:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:26,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:26,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:26,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299440895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:26,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:26,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 21:08:26,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495000526] [2021-05-21 21:08:26,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:26,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:26,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:26,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:26,338 INFO L87 Difference]: Start difference. First operand 26267 states and 94478 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-05-21 21:08:26,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:26,700 INFO L93 Difference]: Finished difference Result 26543 states and 95133 transitions. [2021-05-21 21:08:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:08:26,701 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 23 [2021-05-21 21:08:26,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:26,753 INFO L225 Difference]: With dead ends: 26543 [2021-05-21 21:08:26,753 INFO L226 Difference]: Without dead ends: 26533 [2021-05-21 21:08:26,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:08:26,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26533 states. [2021-05-21 21:08:27,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26533 to 26261. [2021-05-21 21:08:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26261 states, 26260 states have (on average 3.596839299314547) internal successors, (94453), 26260 states have internal predecessors, (94453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:27,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26261 states to 26261 states and 94453 transitions. [2021-05-21 21:08:27,162 INFO L78 Accepts]: Start accepts. Automaton has 26261 states and 94453 transitions. Word has length 23 [2021-05-21 21:08:27,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:27,163 INFO L482 AbstractCegarLoop]: Abstraction has 26261 states and 94453 transitions. [2021-05-21 21:08:27,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-05-21 21:08:27,163 INFO L276 IsEmpty]: Start isEmpty. Operand 26261 states and 94453 transitions. [2021-05-21 21:08:27,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:27,189 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:27,189 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:27,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:27,393 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:27,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:27,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1071393779, now seen corresponding path program 20 times [2021-05-21 21:08:27,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:27,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952718041] [2021-05-21 21:08:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:27,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:27,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952718041] [2021-05-21 21:08:27,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952718041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:27,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614440730] [2021-05-21 21:08:27,413 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 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 [2021-05-21 21:08:27,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:08:27,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:27,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:27,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:27,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:27,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614440730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:27,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:27,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 21:08:27,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027447770] [2021-05-21 21:08:27,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:27,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:27,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:27,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:27,493 INFO L87 Difference]: Start difference. First operand 26261 states and 94453 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-05-21 21:08:27,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:27,717 INFO L93 Difference]: Finished difference Result 26792 states and 96145 transitions. [2021-05-21 21:08:27,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:08:27,717 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 23 [2021-05-21 21:08:27,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:27,770 INFO L225 Difference]: With dead ends: 26792 [2021-05-21 21:08:27,770 INFO L226 Difference]: Without dead ends: 26792 [2021-05-21 21:08:27,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:08:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26792 states. [2021-05-21 21:08:28,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26792 to 26250. [2021-05-21 21:08:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26250 states, 26249 states have (on average 3.595908415558688) internal successors, (94389), 26249 states have internal predecessors, (94389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:28,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26250 states to 26250 states and 94389 transitions. [2021-05-21 21:08:28,189 INFO L78 Accepts]: Start accepts. Automaton has 26250 states and 94389 transitions. Word has length 23 [2021-05-21 21:08:28,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:28,189 INFO L482 AbstractCegarLoop]: Abstraction has 26250 states and 94389 transitions. [2021-05-21 21:08:28,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-05-21 21:08:28,189 INFO L276 IsEmpty]: Start isEmpty. Operand 26250 states and 94389 transitions. [2021-05-21 21:08:28,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:28,214 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:28,214 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:28,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-21 21:08:28,415 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:28,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:28,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1604402439, now seen corresponding path program 25 times [2021-05-21 21:08:28,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:28,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905917833] [2021-05-21 21:08:28,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:28,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:28,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905917833] [2021-05-21 21:08:28,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905917833] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:28,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632828350] [2021-05-21 21:08:28,477 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 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 [2021-05-21 21:08:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:28,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:28,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:28,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632828350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:28,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:28,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:08:28,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147028650] [2021-05-21 21:08:28,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:28,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:28,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:28,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:28,571 INFO L87 Difference]: Start difference. First operand 26250 states and 94389 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-05-21 21:08:28,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:28,873 INFO L93 Difference]: Finished difference Result 26475 states and 94952 transitions. [2021-05-21 21:08:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:08:28,873 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 23 [2021-05-21 21:08:28,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:28,926 INFO L225 Difference]: With dead ends: 26475 [2021-05-21 21:08:28,926 INFO L226 Difference]: Without dead ends: 26404 [2021-05-21 21:08:28,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:08:28,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26404 states. [2021-05-21 21:08:29,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26404 to 26284. [2021-05-21 21:08:29,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26284 states, 26283 states have (on average 3.595099493969486) internal successors, (94490), 26283 states have internal predecessors, (94490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26284 states to 26284 states and 94490 transitions. [2021-05-21 21:08:29,388 INFO L78 Accepts]: Start accepts. Automaton has 26284 states and 94490 transitions. Word has length 23 [2021-05-21 21:08:29,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:29,388 INFO L482 AbstractCegarLoop]: Abstraction has 26284 states and 94490 transitions. [2021-05-21 21:08:29,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-05-21 21:08:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 26284 states and 94490 transitions. [2021-05-21 21:08:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:29,413 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:29,413 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:29,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:29,618 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:29,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:29,618 INFO L82 PathProgramCache]: Analyzing trace with hash 805362435, now seen corresponding path program 26 times [2021-05-21 21:08:29,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:29,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739592648] [2021-05-21 21:08:29,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:29,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:29,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739592648] [2021-05-21 21:08:29,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739592648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:29,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787763227] [2021-05-21 21:08:29,671 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 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 [2021-05-21 21:08:29,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:08:29,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:29,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:29,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:29,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787763227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:29,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:29,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:08:29,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417010202] [2021-05-21 21:08:29,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:29,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:29,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:29,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:29,775 INFO L87 Difference]: Start difference. First operand 26284 states and 94490 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:30,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:30,055 INFO L93 Difference]: Finished difference Result 33195 states and 119238 transitions. [2021-05-21 21:08:30,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:08:30,056 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:30,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:30,120 INFO L225 Difference]: With dead ends: 33195 [2021-05-21 21:08:30,121 INFO L226 Difference]: Without dead ends: 33149 [2021-05-21 21:08:30,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:08:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33149 states. [2021-05-21 21:08:30,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33149 to 26274. [2021-05-21 21:08:30,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26274 states, 26273 states have (on average 3.5954782476306475) internal successors, (94464), 26273 states have internal predecessors, (94464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26274 states to 26274 states and 94464 transitions. [2021-05-21 21:08:30,585 INFO L78 Accepts]: Start accepts. Automaton has 26274 states and 94464 transitions. Word has length 23 [2021-05-21 21:08:30,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:30,585 INFO L482 AbstractCegarLoop]: Abstraction has 26274 states and 94464 transitions. [2021-05-21 21:08:30,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:30,585 INFO L276 IsEmpty]: Start isEmpty. Operand 26274 states and 94464 transitions. [2021-05-21 21:08:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:30,609 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:30,609 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:30,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-21 21:08:30,809 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:30,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:30,809 INFO L82 PathProgramCache]: Analyzing trace with hash 723963379, now seen corresponding path program 27 times [2021-05-21 21:08:30,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:30,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789053566] [2021-05-21 21:08:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:30,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:30,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789053566] [2021-05-21 21:08:30,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789053566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:30,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419672899] [2021-05-21 21:08:30,859 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 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 [2021-05-21 21:08:30,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:08:30,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:30,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:30,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:30,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419672899] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:30,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:30,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:08:30,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336988772] [2021-05-21 21:08:30,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:08:30,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:30,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:08:30,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:08:30,967 INFO L87 Difference]: Start difference. First operand 26274 states and 94464 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:31,598 INFO L93 Difference]: Finished difference Result 33827 states and 120954 transitions. [2021-05-21 21:08:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 21:08:31,599 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:31,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:31,664 INFO L225 Difference]: With dead ends: 33827 [2021-05-21 21:08:31,664 INFO L226 Difference]: Without dead ends: 33589 [2021-05-21 21:08:31,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 369.6ms TimeCoverageRelationStatistics Valid=257, Invalid=613, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:08:31,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33589 states. [2021-05-21 21:08:32,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33589 to 26278. [2021-05-21 21:08:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26278 states, 26277 states have (on average 3.59557788179777) internal successors, (94481), 26277 states have internal predecessors, (94481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:32,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26278 states to 26278 states and 94481 transitions. [2021-05-21 21:08:32,220 INFO L78 Accepts]: Start accepts. Automaton has 26278 states and 94481 transitions. Word has length 23 [2021-05-21 21:08:32,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:32,220 INFO L482 AbstractCegarLoop]: Abstraction has 26278 states and 94481 transitions. [2021-05-21 21:08:32,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:32,220 INFO L276 IsEmpty]: Start isEmpty. Operand 26278 states and 94481 transitions. [2021-05-21 21:08:32,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:32,244 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:32,244 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:32,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:32,445 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:32,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:32,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1201212733, now seen corresponding path program 28 times [2021-05-21 21:08:32,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:32,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134526704] [2021-05-21 21:08:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:32,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:32,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134526704] [2021-05-21 21:08:32,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134526704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:32,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196530679] [2021-05-21 21:08:32,508 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 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 [2021-05-21 21:08:32,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:08:32,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:32,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:32,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:32,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196530679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:32,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:32,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-21 21:08:32,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800532446] [2021-05-21 21:08:32,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:08:32,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:32,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:08:32,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:08:32,574 INFO L87 Difference]: Start difference. First operand 26278 states and 94481 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-05-21 21:08:32,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:32,778 INFO L93 Difference]: Finished difference Result 26465 states and 94972 transitions. [2021-05-21 21:08:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:08:32,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 23 [2021-05-21 21:08:32,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:32,830 INFO L225 Difference]: With dead ends: 26465 [2021-05-21 21:08:32,830 INFO L226 Difference]: Without dead ends: 26406 [2021-05-21 21:08:32,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26406 states. [2021-05-21 21:08:33,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26406 to 26302. [2021-05-21 21:08:33,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26302 states, 26301 states have (on average 3.595262537546101) internal successors, (94559), 26301 states have internal predecessors, (94559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26302 states to 26302 states and 94559 transitions. [2021-05-21 21:08:33,238 INFO L78 Accepts]: Start accepts. Automaton has 26302 states and 94559 transitions. Word has length 23 [2021-05-21 21:08:33,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:33,238 INFO L482 AbstractCegarLoop]: Abstraction has 26302 states and 94559 transitions. [2021-05-21 21:08:33,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-05-21 21:08:33,238 INFO L276 IsEmpty]: Start isEmpty. Operand 26302 states and 94559 transitions. [2021-05-21 21:08:33,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:33,263 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:33,263 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:33,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:33,463 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:33,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:33,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2000252737, now seen corresponding path program 29 times [2021-05-21 21:08:33,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:33,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534323109] [2021-05-21 21:08:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:33,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:33,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534323109] [2021-05-21 21:08:33,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534323109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:33,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954113834] [2021-05-21 21:08:33,530 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 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 [2021-05-21 21:08:33,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:08:33,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:33,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:33,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:33,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954113834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:33,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:33,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:08:33,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171428230] [2021-05-21 21:08:33,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:33,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:33,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:33,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:33,621 INFO L87 Difference]: Start difference. First operand 26302 states and 94559 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:33,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:33,873 INFO L93 Difference]: Finished difference Result 33157 states and 119124 transitions. [2021-05-21 21:08:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:08:33,874 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:33,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:33,936 INFO L225 Difference]: With dead ends: 33157 [2021-05-21 21:08:33,936 INFO L226 Difference]: Without dead ends: 33111 [2021-05-21 21:08:33,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:08:33,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33111 states. [2021-05-21 21:08:34,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33111 to 26299. [2021-05-21 21:08:34,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26299 states, 26298 states have (on average 3.595520571906609) internal successors, (94555), 26298 states have internal predecessors, (94555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26299 states to 26299 states and 94555 transitions. [2021-05-21 21:08:34,510 INFO L78 Accepts]: Start accepts. Automaton has 26299 states and 94555 transitions. Word has length 23 [2021-05-21 21:08:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:34,510 INFO L482 AbstractCegarLoop]: Abstraction has 26299 states and 94555 transitions. [2021-05-21 21:08:34,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:34,511 INFO L276 IsEmpty]: Start isEmpty. Operand 26299 states and 94555 transitions. [2021-05-21 21:08:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:34,536 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:34,536 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:34,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-05-21 21:08:34,737 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:34,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:34,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2034590693, now seen corresponding path program 30 times [2021-05-21 21:08:34,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:34,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133581147] [2021-05-21 21:08:34,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:34,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:34,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133581147] [2021-05-21 21:08:34,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133581147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:34,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482592101] [2021-05-21 21:08:34,803 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 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 [2021-05-21 21:08:34,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:08:34,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:34,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:34,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:34,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482592101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:34,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:34,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-21 21:08:34,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855261695] [2021-05-21 21:08:34,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:08:34,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:34,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:08:34,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:08:34,868 INFO L87 Difference]: Start difference. First operand 26299 states and 94555 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:35,058 INFO L93 Difference]: Finished difference Result 26430 states and 94880 transitions. [2021-05-21 21:08:35,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:08:35,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:35,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:35,109 INFO L225 Difference]: With dead ends: 26430 [2021-05-21 21:08:35,109 INFO L226 Difference]: Without dead ends: 26387 [2021-05-21 21:08:35,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:35,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26387 states. [2021-05-21 21:08:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26387 to 26303. [2021-05-21 21:08:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26303 states, 26302 states have (on average 3.595201885788153) internal successors, (94561), 26302 states have internal predecessors, (94561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:35,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26303 states to 26303 states and 94561 transitions. [2021-05-21 21:08:35,516 INFO L78 Accepts]: Start accepts. Automaton has 26303 states and 94561 transitions. Word has length 23 [2021-05-21 21:08:35,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:35,517 INFO L482 AbstractCegarLoop]: Abstraction has 26303 states and 94561 transitions. [2021-05-21 21:08:35,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 26303 states and 94561 transitions. [2021-05-21 21:08:35,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:35,541 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:35,541 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:35,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-21 21:08:35,741 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:35,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:35,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2056346547, now seen corresponding path program 31 times [2021-05-21 21:08:35,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:35,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810942289] [2021-05-21 21:08:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:35,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:35,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810942289] [2021-05-21 21:08:35,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810942289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:35,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564740137] [2021-05-21 21:08:35,789 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 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 [2021-05-21 21:08:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:35,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:08:35,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:35,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564740137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:35,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:35,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-21 21:08:35,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800508036] [2021-05-21 21:08:35,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:35,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:35,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:35,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:35,851 INFO L87 Difference]: Start difference. First operand 26303 states and 94561 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:36,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:36,078 INFO L93 Difference]: Finished difference Result 27397 states and 97838 transitions. [2021-05-21 21:08:36,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:08:36,079 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:36,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:36,133 INFO L225 Difference]: With dead ends: 27397 [2021-05-21 21:08:36,133 INFO L226 Difference]: Without dead ends: 27397 [2021-05-21 21:08:36,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:08:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27397 states. [2021-05-21 21:08:36,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27397 to 26148. [2021-05-21 21:08:36,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26148 states, 26147 states have (on average 3.595861857956936) internal successors, (94021), 26147 states have internal predecessors, (94021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26148 states to 26148 states and 94021 transitions. [2021-05-21 21:08:36,552 INFO L78 Accepts]: Start accepts. Automaton has 26148 states and 94021 transitions. Word has length 23 [2021-05-21 21:08:36,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:36,552 INFO L482 AbstractCegarLoop]: Abstraction has 26148 states and 94021 transitions. [2021-05-21 21:08:36,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:36,552 INFO L276 IsEmpty]: Start isEmpty. Operand 26148 states and 94021 transitions. [2021-05-21 21:08:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:36,576 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:36,576 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:36,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:36,776 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:36,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:36,777 INFO L82 PathProgramCache]: Analyzing trace with hash 472108223, now seen corresponding path program 32 times [2021-05-21 21:08:36,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:36,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335647379] [2021-05-21 21:08:36,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:36,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:36,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335647379] [2021-05-21 21:08:36,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335647379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:36,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610395346] [2021-05-21 21:08:36,823 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 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 [2021-05-21 21:08:36,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:08:36,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:36,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:08:36,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:36,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610395346] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:36,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:36,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-21 21:08:36,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110857194] [2021-05-21 21:08:36,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:08:36,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:36,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:08:36,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:08:36,940 INFO L87 Difference]: Start difference. First operand 26148 states and 94021 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:37,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:37,373 INFO L93 Difference]: Finished difference Result 42723 states and 155237 transitions. [2021-05-21 21:08:37,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:08:37,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:37,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:37,465 INFO L225 Difference]: With dead ends: 42723 [2021-05-21 21:08:37,465 INFO L226 Difference]: Without dead ends: 42723 [2021-05-21 21:08:37,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:08:37,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42723 states. [2021-05-21 21:08:37,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42723 to 21505. [2021-05-21 21:08:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21505 states, 21504 states have (on average 3.5904482886904763) internal successors, (77209), 21504 states have internal predecessors, (77209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21505 states to 21505 states and 77209 transitions. [2021-05-21 21:08:37,944 INFO L78 Accepts]: Start accepts. Automaton has 21505 states and 77209 transitions. Word has length 23 [2021-05-21 21:08:37,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:37,944 INFO L482 AbstractCegarLoop]: Abstraction has 21505 states and 77209 transitions. [2021-05-21 21:08:37,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:37,944 INFO L276 IsEmpty]: Start isEmpty. Operand 21505 states and 77209 transitions. [2021-05-21 21:08:37,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:37,967 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:37,967 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:38,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-21 21:08:38,167 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:38,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:38,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1491839683, now seen corresponding path program 33 times [2021-05-21 21:08:38,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:38,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886688402] [2021-05-21 21:08:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:38,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:38,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886688402] [2021-05-21 21:08:38,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886688402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:38,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233996581] [2021-05-21 21:08:38,205 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 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 [2021-05-21 21:08:38,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:08:38,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:38,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:08:38,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:38,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233996581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:38,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:38,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-05-21 21:08:38,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367256771] [2021-05-21 21:08:38,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:38,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:38,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:38,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:38,285 INFO L87 Difference]: Start difference. First operand 21505 states and 77209 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-05-21 21:08:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:38,585 INFO L93 Difference]: Finished difference Result 32944 states and 119221 transitions. [2021-05-21 21:08:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:08:38,585 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 23 [2021-05-21 21:08:38,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:38,651 INFO L225 Difference]: With dead ends: 32944 [2021-05-21 21:08:38,651 INFO L226 Difference]: Without dead ends: 32944 [2021-05-21 21:08:38,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:08:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32944 states. [2021-05-21 21:08:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32944 to 25922. [2021-05-21 21:08:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25922 states, 25921 states have (on average 3.586397129740365) internal successors, (92963), 25921 states have internal predecessors, (92963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25922 states to 25922 states and 92963 transitions. [2021-05-21 21:08:39,101 INFO L78 Accepts]: Start accepts. Automaton has 25922 states and 92963 transitions. Word has length 23 [2021-05-21 21:08:39,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:39,102 INFO L482 AbstractCegarLoop]: Abstraction has 25922 states and 92963 transitions. [2021-05-21 21:08:39,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-05-21 21:08:39,102 INFO L276 IsEmpty]: Start isEmpty. Operand 25922 states and 92963 transitions. [2021-05-21 21:08:39,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:39,135 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:39,135 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:39,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:39,336 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:39,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:39,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1489861369, now seen corresponding path program 34 times [2021-05-21 21:08:39,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:39,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555064586] [2021-05-21 21:08:39,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:39,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:39,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555064586] [2021-05-21 21:08:39,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555064586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:39,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836021277] [2021-05-21 21:08:39,402 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 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 [2021-05-21 21:08:39,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:08:39,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:39,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:39,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:39,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836021277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:39,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:39,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-21 21:08:39,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612189492] [2021-05-21 21:08:39,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:08:39,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:39,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:08:39,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:08:39,468 INFO L87 Difference]: Start difference. First operand 25922 states and 92963 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-05-21 21:08:39,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:39,673 INFO L93 Difference]: Finished difference Result 26059 states and 93304 transitions. [2021-05-21 21:08:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:08:39,673 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 23 [2021-05-21 21:08:39,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:39,724 INFO L225 Difference]: With dead ends: 26059 [2021-05-21 21:08:39,724 INFO L226 Difference]: Without dead ends: 26010 [2021-05-21 21:08:39,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:39,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26010 states. [2021-05-21 21:08:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26010 to 25935. [2021-05-21 21:08:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25935 states, 25934 states have (on average 3.5862188632682965) internal successors, (93005), 25934 states have internal predecessors, (93005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25935 states to 25935 states and 93005 transitions. [2021-05-21 21:08:40,237 INFO L78 Accepts]: Start accepts. Automaton has 25935 states and 93005 transitions. Word has length 23 [2021-05-21 21:08:40,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:40,237 INFO L482 AbstractCegarLoop]: Abstraction has 25935 states and 93005 transitions. [2021-05-21 21:08:40,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-05-21 21:08:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 25935 states and 93005 transitions. [2021-05-21 21:08:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:40,263 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:40,263 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:40,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-21 21:08:40,463 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:40,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:40,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2006065923, now seen corresponding path program 35 times [2021-05-21 21:08:40,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:40,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461051883] [2021-05-21 21:08:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:40,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:40,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461051883] [2021-05-21 21:08:40,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461051883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:40,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935880925] [2021-05-21 21:08:40,527 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 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 [2021-05-21 21:08:40,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:08:40,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:40,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:40,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:40,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935880925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:40,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:40,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:08:40,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243280675] [2021-05-21 21:08:40,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:40,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:40,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:40,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:40,624 INFO L87 Difference]: Start difference. First operand 25935 states and 93005 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:41,098 INFO L93 Difference]: Finished difference Result 32792 states and 117496 transitions. [2021-05-21 21:08:41,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:08:41,099 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:41,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:41,169 INFO L225 Difference]: With dead ends: 32792 [2021-05-21 21:08:41,169 INFO L226 Difference]: Without dead ends: 32673 [2021-05-21 21:08:41,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-05-21 21:08:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32673 states. [2021-05-21 21:08:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32673 to 25932. [2021-05-21 21:08:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25932 states, 25931 states have (on average 3.586363811654005) internal successors, (92998), 25931 states have internal predecessors, (92998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:41,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25932 states to 25932 states and 92998 transitions. [2021-05-21 21:08:41,688 INFO L78 Accepts]: Start accepts. Automaton has 25932 states and 92998 transitions. Word has length 23 [2021-05-21 21:08:41,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:41,688 INFO L482 AbstractCegarLoop]: Abstraction has 25932 states and 92998 transitions. [2021-05-21 21:08:41,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:41,688 INFO L276 IsEmpty]: Start isEmpty. Operand 25932 states and 92998 transitions. [2021-05-21 21:08:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:41,714 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:41,714 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:41,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:41,917 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:41,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:41,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1745942057, now seen corresponding path program 36 times [2021-05-21 21:08:41,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:41,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773275395] [2021-05-21 21:08:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:42,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:42,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773275395] [2021-05-21 21:08:42,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773275395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:42,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787029086] [2021-05-21 21:08:42,002 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 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 [2021-05-21 21:08:42,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:08:42,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:42,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:42,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:42,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787029086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:42,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:42,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-21 21:08:42,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505903415] [2021-05-21 21:08:42,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:08:42,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:42,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:08:42,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:08:42,072 INFO L87 Difference]: Start difference. First operand 25932 states and 92998 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:42,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:42,289 INFO L93 Difference]: Finished difference Result 26059 states and 93301 transitions. [2021-05-21 21:08:42,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:08:42,290 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:42,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:42,340 INFO L225 Difference]: With dead ends: 26059 [2021-05-21 21:08:42,341 INFO L226 Difference]: Without dead ends: 26016 [2021-05-21 21:08:42,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26016 states. [2021-05-21 21:08:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26016 to 25932. [2021-05-21 21:08:42,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25932 states, 25931 states have (on average 3.586363811654005) internal successors, (92998), 25931 states have internal predecessors, (92998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25932 states to 25932 states and 92998 transitions. [2021-05-21 21:08:42,746 INFO L78 Accepts]: Start accepts. Automaton has 25932 states and 92998 transitions. Word has length 23 [2021-05-21 21:08:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:42,746 INFO L482 AbstractCegarLoop]: Abstraction has 25932 states and 92998 transitions. [2021-05-21 21:08:42,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:42,746 INFO L276 IsEmpty]: Start isEmpty. Operand 25932 states and 92998 transitions. [2021-05-21 21:08:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:42,771 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:42,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:42,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-21 21:08:42,972 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:42,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:42,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1767697911, now seen corresponding path program 37 times [2021-05-21 21:08:42,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:42,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598272033] [2021-05-21 21:08:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:43,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:43,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598272033] [2021-05-21 21:08:43,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598272033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:43,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109199557] [2021-05-21 21:08:43,013 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 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 [2021-05-21 21:08:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:43,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:08:43,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:43,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109199557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:43,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:43,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-21 21:08:43,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167551017] [2021-05-21 21:08:43,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:43,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:43,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:43,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:43,090 INFO L87 Difference]: Start difference. First operand 25932 states and 92998 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:43,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:43,355 INFO L93 Difference]: Finished difference Result 27582 states and 98159 transitions. [2021-05-21 21:08:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:08:43,356 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:43,414 INFO L225 Difference]: With dead ends: 27582 [2021-05-21 21:08:43,415 INFO L226 Difference]: Without dead ends: 27582 [2021-05-21 21:08:43,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:08:43,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27582 states. [2021-05-21 21:08:43,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27582 to 26354. [2021-05-21 21:08:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26354 states, 26353 states have (on average 3.585436193222783) internal successors, (94487), 26353 states have internal predecessors, (94487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:43,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26354 states to 26354 states and 94487 transitions. [2021-05-21 21:08:43,987 INFO L78 Accepts]: Start accepts. Automaton has 26354 states and 94487 transitions. Word has length 23 [2021-05-21 21:08:43,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:43,988 INFO L482 AbstractCegarLoop]: Abstraction has 26354 states and 94487 transitions. [2021-05-21 21:08:43,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 26354 states and 94487 transitions. [2021-05-21 21:08:44,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:44,012 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:44,012 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:44,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:44,213 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:44,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:44,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1625128567, now seen corresponding path program 38 times [2021-05-21 21:08:44,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:44,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428702393] [2021-05-21 21:08:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:44,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:44,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428702393] [2021-05-21 21:08:44,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428702393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:44,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690924371] [2021-05-21 21:08:44,251 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 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 [2021-05-21 21:08:44,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:08:44,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:44,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:08:44,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:44,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690924371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:44,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:44,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:08:44,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98847987] [2021-05-21 21:08:44,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:44,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:44,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:44,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:44,340 INFO L87 Difference]: Start difference. First operand 26354 states and 94487 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-05-21 21:08:44,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:44,640 INFO L93 Difference]: Finished difference Result 35465 states and 126867 transitions. [2021-05-21 21:08:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:08:44,640 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 23 [2021-05-21 21:08:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:44,719 INFO L225 Difference]: With dead ends: 35465 [2021-05-21 21:08:44,719 INFO L226 Difference]: Without dead ends: 35465 [2021-05-21 21:08:44,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:08:44,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35465 states. [2021-05-21 21:08:45,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35465 to 25981. [2021-05-21 21:08:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25981 states, 25980 states have (on average 3.5869515011547346) internal successors, (93189), 25980 states have internal predecessors, (93189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25981 states to 25981 states and 93189 transitions. [2021-05-21 21:08:45,203 INFO L78 Accepts]: Start accepts. Automaton has 25981 states and 93189 transitions. Word has length 23 [2021-05-21 21:08:45,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:45,203 INFO L482 AbstractCegarLoop]: Abstraction has 25981 states and 93189 transitions. [2021-05-21 21:08:45,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-05-21 21:08:45,204 INFO L276 IsEmpty]: Start isEmpty. Operand 25981 states and 93189 transitions. [2021-05-21 21:08:45,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:45,229 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:45,229 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:45,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-21 21:08:45,430 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:45,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:45,430 INFO L82 PathProgramCache]: Analyzing trace with hash 685163967, now seen corresponding path program 39 times [2021-05-21 21:08:45,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:45,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159258451] [2021-05-21 21:08:45,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:45,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:45,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159258451] [2021-05-21 21:08:45,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159258451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:45,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783654627] [2021-05-21 21:08:45,500 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:08:45,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:08:45,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:45,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:08:45,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:45,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783654627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:45,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:45,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-21 21:08:45,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409932706] [2021-05-21 21:08:45,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:08:45,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:45,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:08:45,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:08:45,571 INFO L87 Difference]: Start difference. First operand 25981 states and 93189 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:45,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:45,763 INFO L93 Difference]: Finished difference Result 26050 states and 93338 transitions. [2021-05-21 21:08:45,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:08:45,764 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:45,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:45,816 INFO L225 Difference]: With dead ends: 26050 [2021-05-21 21:08:45,816 INFO L226 Difference]: Without dead ends: 26007 [2021-05-21 21:08:45,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:08:45,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26007 states. [2021-05-21 21:08:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26007 to 25986. [2021-05-21 21:08:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25986 states, 25985 states have (on average 3.586800076967481) internal successors, (93203), 25985 states have internal predecessors, (93203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:46,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25986 states to 25986 states and 93203 transitions. [2021-05-21 21:08:46,226 INFO L78 Accepts]: Start accepts. Automaton has 25986 states and 93203 transitions. Word has length 23 [2021-05-21 21:08:46,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:46,226 INFO L482 AbstractCegarLoop]: Abstraction has 25986 states and 93203 transitions. [2021-05-21 21:08:46,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:46,226 INFO L276 IsEmpty]: Start isEmpty. Operand 25986 states and 93203 transitions. [2021-05-21 21:08:46,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:46,252 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:46,252 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:46,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:46,466 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:46,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:46,467 INFO L82 PathProgramCache]: Analyzing trace with hash 706919821, now seen corresponding path program 40 times [2021-05-21 21:08:46,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:46,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776380917] [2021-05-21 21:08:46,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:46,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:46,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776380917] [2021-05-21 21:08:46,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776380917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:46,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047450075] [2021-05-21 21:08:46,507 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 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 [2021-05-21 21:08:46,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:08:46,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:46,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:08:46,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:46,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047450075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:46,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:46,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-21 21:08:46,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702536501] [2021-05-21 21:08:46,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:46,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:46,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:46,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:46,586 INFO L87 Difference]: Start difference. First operand 25986 states and 93203 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:46,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:46,837 INFO L93 Difference]: Finished difference Result 29926 states and 106677 transitions. [2021-05-21 21:08:46,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:08:46,837 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:46,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:46,903 INFO L225 Difference]: With dead ends: 29926 [2021-05-21 21:08:46,903 INFO L226 Difference]: Without dead ends: 29926 [2021-05-21 21:08:46,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:08:46,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29926 states. [2021-05-21 21:08:47,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29926 to 28815. [2021-05-21 21:08:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28815 states, 28814 states have (on average 3.58617338793642) internal successors, (103332), 28814 states have internal predecessors, (103332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28815 states to 28815 states and 103332 transitions. [2021-05-21 21:08:47,364 INFO L78 Accepts]: Start accepts. Automaton has 28815 states and 103332 transitions. Word has length 23 [2021-05-21 21:08:47,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:47,364 INFO L482 AbstractCegarLoop]: Abstraction has 28815 states and 103332 transitions. [2021-05-21 21:08:47,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 28815 states and 103332 transitions. [2021-05-21 21:08:47,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:47,390 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:47,390 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:47,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:47,591 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:47,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:47,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1807581121, now seen corresponding path program 41 times [2021-05-21 21:08:47,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:47,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073707936] [2021-05-21 21:08:47,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:47,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:47,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073707936] [2021-05-21 21:08:47,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073707936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:47,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503074800] [2021-05-21 21:08:47,620 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 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 [2021-05-21 21:08:47,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:08:47,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:47,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:47,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:47,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503074800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:47,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:47,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 21:08:47,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354228371] [2021-05-21 21:08:47,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:08:47,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:47,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:08:47,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:08:47,680 INFO L87 Difference]: Start difference. First operand 28815 states and 103332 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:47,999 INFO L93 Difference]: Finished difference Result 29526 states and 105293 transitions. [2021-05-21 21:08:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:08:47,999 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:47,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:48,057 INFO L225 Difference]: With dead ends: 29526 [2021-05-21 21:08:48,057 INFO L226 Difference]: Without dead ends: 29526 [2021-05-21 21:08:48,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:08:48,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29526 states. [2021-05-21 21:08:48,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29526 to 28856. [2021-05-21 21:08:48,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28856 states, 28855 states have (on average 3.585617743891873) internal successors, (103463), 28855 states have internal predecessors, (103463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28856 states to 28856 states and 103463 transitions. [2021-05-21 21:08:48,515 INFO L78 Accepts]: Start accepts. Automaton has 28856 states and 103463 transitions. Word has length 23 [2021-05-21 21:08:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:48,516 INFO L482 AbstractCegarLoop]: Abstraction has 28856 states and 103463 transitions. [2021-05-21 21:08:48,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:48,516 INFO L276 IsEmpty]: Start isEmpty. Operand 28856 states and 103463 transitions. [2021-05-21 21:08:48,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:48,542 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:48,542 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:48,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-21 21:08:48,742 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:48,743 INFO L82 PathProgramCache]: Analyzing trace with hash 817141951, now seen corresponding path program 16 times [2021-05-21 21:08:48,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:48,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217169314] [2021-05-21 21:08:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:08:48,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:48,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217169314] [2021-05-21 21:08:48,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217169314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:48,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101682514] [2021-05-21 21:08:48,845 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 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 [2021-05-21 21:08:48,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:08:48,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:48,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:08:48,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:08:48,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101682514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:48,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:48,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-05-21 21:08:48,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470205935] [2021-05-21 21:08:48,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:08:48,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:48,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:08:48,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:08:48,910 INFO L87 Difference]: Start difference. First operand 28856 states and 103463 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:49,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:49,070 INFO L93 Difference]: Finished difference Result 29072 states and 104061 transitions. [2021-05-21 21:08:49,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:08:49,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:49,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:49,126 INFO L225 Difference]: With dead ends: 29072 [2021-05-21 21:08:49,126 INFO L226 Difference]: Without dead ends: 29019 [2021-05-21 21:08:49,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:08:49,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29019 states. [2021-05-21 21:08:49,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29019 to 28851. [2021-05-21 21:08:49,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28851 states, 28850 states have (on average 3.5844367417677643) internal successors, (103411), 28850 states have internal predecessors, (103411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:49,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28851 states to 28851 states and 103411 transitions. [2021-05-21 21:08:49,560 INFO L78 Accepts]: Start accepts. Automaton has 28851 states and 103411 transitions. Word has length 23 [2021-05-21 21:08:49,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:49,560 INFO L482 AbstractCegarLoop]: Abstraction has 28851 states and 103411 transitions. [2021-05-21 21:08:49,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:49,560 INFO L276 IsEmpty]: Start isEmpty. Operand 28851 states and 103411 transitions. [2021-05-21 21:08:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:49,587 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:49,587 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:49,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-21 21:08:49,788 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:49,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:49,788 INFO L82 PathProgramCache]: Analyzing trace with hash 2049439803, now seen corresponding path program 42 times [2021-05-21 21:08:49,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:49,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007765906] [2021-05-21 21:08:49,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:49,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:49,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007765906] [2021-05-21 21:08:49,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007765906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:49,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458728181] [2021-05-21 21:08:49,815 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 [2021-05-21 21:08:49,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:08:49,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:49,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:49,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:49,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458728181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:49,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:49,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 21:08:49,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082286433] [2021-05-21 21:08:49,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:49,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:49,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:49,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:49,881 INFO L87 Difference]: Start difference. First operand 28851 states and 103411 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:50,138 INFO L93 Difference]: Finished difference Result 37800 states and 135115 transitions. [2021-05-21 21:08:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:08:50,138 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:50,216 INFO L225 Difference]: With dead ends: 37800 [2021-05-21 21:08:50,216 INFO L226 Difference]: Without dead ends: 37800 [2021-05-21 21:08:50,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:08:50,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37800 states. [2021-05-21 21:08:50,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37800 to 19949. [2021-05-21 21:08:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19949 states, 19948 states have (on average 3.5674754361339485) internal successors, (71164), 19948 states have internal predecessors, (71164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:50,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19949 states to 19949 states and 71164 transitions. [2021-05-21 21:08:50,644 INFO L78 Accepts]: Start accepts. Automaton has 19949 states and 71164 transitions. Word has length 23 [2021-05-21 21:08:50,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:50,644 INFO L482 AbstractCegarLoop]: Abstraction has 19949 states and 71164 transitions. [2021-05-21 21:08:50,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:50,644 INFO L276 IsEmpty]: Start isEmpty. Operand 19949 states and 71164 transitions. [2021-05-21 21:08:50,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:50,665 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:50,665 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:50,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:50,866 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:50,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:50,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1759723389, now seen corresponding path program 43 times [2021-05-21 21:08:50,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:50,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650037605] [2021-05-21 21:08:50,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:50,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:50,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650037605] [2021-05-21 21:08:50,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650037605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:50,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014888730] [2021-05-21 21:08:50,906 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 [2021-05-21 21:08:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:50,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:50,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:50,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014888730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:50,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:50,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 21:08:50,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904525111] [2021-05-21 21:08:50,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:50,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:50,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:50,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:50,975 INFO L87 Difference]: Start difference. First operand 19949 states and 71164 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:51,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:51,251 INFO L93 Difference]: Finished difference Result 28786 states and 101970 transitions. [2021-05-21 21:08:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:08:51,251 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:51,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:51,309 INFO L225 Difference]: With dead ends: 28786 [2021-05-21 21:08:51,309 INFO L226 Difference]: Without dead ends: 28786 [2021-05-21 21:08:51,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:08:51,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28786 states. [2021-05-21 21:08:51,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28786 to 27373. [2021-05-21 21:08:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27373 states, 27372 states have (on average 3.5752228554727457) internal successors, (97861), 27372 states have internal predecessors, (97861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:51,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27373 states to 27373 states and 97861 transitions. [2021-05-21 21:08:51,805 INFO L78 Accepts]: Start accepts. Automaton has 27373 states and 97861 transitions. Word has length 23 [2021-05-21 21:08:51,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:51,805 INFO L482 AbstractCegarLoop]: Abstraction has 27373 states and 97861 transitions. [2021-05-21 21:08:51,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:51,805 INFO L276 IsEmpty]: Start isEmpty. Operand 27373 states and 97861 transitions. [2021-05-21 21:08:51,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:51,831 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:51,831 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:52,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:52,037 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:52,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:52,037 INFO L82 PathProgramCache]: Analyzing trace with hash 208892275, now seen corresponding path program 17 times [2021-05-21 21:08:52,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:52,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111938938] [2021-05-21 21:08:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 21:08:52,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:52,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111938938] [2021-05-21 21:08:52,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111938938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:52,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035948816] [2021-05-21 21:08:52,073 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 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 [2021-05-21 21:08:52,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:08:52,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:52,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:08:52,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 21:08:52,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035948816] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:52,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:52,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-21 21:08:52,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821061029] [2021-05-21 21:08:52,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:08:52,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:52,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:08:52,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:08:52,141 INFO L87 Difference]: Start difference. First operand 27373 states and 97861 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:52,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:52,274 INFO L93 Difference]: Finished difference Result 27858 states and 99275 transitions. [2021-05-21 21:08:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:08:52,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:52,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:52,333 INFO L225 Difference]: With dead ends: 27858 [2021-05-21 21:08:52,333 INFO L226 Difference]: Without dead ends: 27777 [2021-05-21 21:08:52,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:08:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27777 states. [2021-05-21 21:08:52,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27777 to 27398. [2021-05-21 21:08:52,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27398 states, 27397 states have (on average 3.575135963791656) internal successors, (97948), 27397 states have internal predecessors, (97948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:52,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27398 states to 27398 states and 97948 transitions. [2021-05-21 21:08:52,761 INFO L78 Accepts]: Start accepts. Automaton has 27398 states and 97948 transitions. Word has length 23 [2021-05-21 21:08:52,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:52,761 INFO L482 AbstractCegarLoop]: Abstraction has 27398 states and 97948 transitions. [2021-05-21 21:08:52,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 27398 states and 97948 transitions. [2021-05-21 21:08:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:52,787 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:52,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:52,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:08:52,988 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:52,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:52,988 INFO L82 PathProgramCache]: Analyzing trace with hash 848779567, now seen corresponding path program 44 times [2021-05-21 21:08:52,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:52,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168944469] [2021-05-21 21:08:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:53,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:53,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168944469] [2021-05-21 21:08:53,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168944469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:53,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981904643] [2021-05-21 21:08:53,012 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 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 [2021-05-21 21:08:53,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:08:53,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:53,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:53,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:53,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981904643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:53,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:53,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 21:08:53,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540666409] [2021-05-21 21:08:53,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:08:53,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:53,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:08:53,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:08:53,080 INFO L87 Difference]: Start difference. First operand 27398 states and 97948 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-05-21 21:08:53,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:53,375 INFO L93 Difference]: Finished difference Result 38461 states and 138552 transitions. [2021-05-21 21:08:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:08:53,375 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 23 [2021-05-21 21:08:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:53,457 INFO L225 Difference]: With dead ends: 38461 [2021-05-21 21:08:53,457 INFO L226 Difference]: Without dead ends: 38461 [2021-05-21 21:08:53,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:08:53,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38461 states. [2021-05-21 21:08:53,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38461 to 24308. [2021-05-21 21:08:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24308 states, 24307 states have (on average 3.5794215658040893) internal successors, (87005), 24307 states have internal predecessors, (87005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:53,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24308 states to 24308 states and 87005 transitions. [2021-05-21 21:08:53,908 INFO L78 Accepts]: Start accepts. Automaton has 24308 states and 87005 transitions. Word has length 23 [2021-05-21 21:08:53,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:53,908 INFO L482 AbstractCegarLoop]: Abstraction has 24308 states and 87005 transitions. [2021-05-21 21:08:53,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-05-21 21:08:53,908 INFO L276 IsEmpty]: Start isEmpty. Operand 24308 states and 87005 transitions. [2021-05-21 21:08:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:53,936 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:53,936 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:54,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-05-21 21:08:54,137 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:54,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1907900651, now seen corresponding path program 18 times [2021-05-21 21:08:54,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:54,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638037814] [2021-05-21 21:08:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:08:54,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:54,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638037814] [2021-05-21 21:08:54,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638037814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:54,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184154762] [2021-05-21 21:08:54,202 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 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 [2021-05-21 21:08:54,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:08:54,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:54,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:08:54,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:08:54,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184154762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:54,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:54,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-05-21 21:08:54,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49278094] [2021-05-21 21:08:54,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:08:54,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:54,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:08:54,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:08:54,259 INFO L87 Difference]: Start difference. First operand 24308 states and 87005 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:54,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:54,407 INFO L93 Difference]: Finished difference Result 24924 states and 88837 transitions. [2021-05-21 21:08:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:08:54,407 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:54,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:54,458 INFO L225 Difference]: With dead ends: 24924 [2021-05-21 21:08:54,458 INFO L226 Difference]: Without dead ends: 24835 [2021-05-21 21:08:54,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:08:54,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24835 states. [2021-05-21 21:08:54,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24835 to 24301. [2021-05-21 21:08:54,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24301 states, 24300 states have (on average 3.579835390946502) internal successors, (86990), 24300 states have internal predecessors, (86990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:54,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24301 states to 24301 states and 86990 transitions. [2021-05-21 21:08:54,867 INFO L78 Accepts]: Start accepts. Automaton has 24301 states and 86990 transitions. Word has length 23 [2021-05-21 21:08:54,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:54,867 INFO L482 AbstractCegarLoop]: Abstraction has 24301 states and 86990 transitions. [2021-05-21 21:08:54,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 24301 states and 86990 transitions. [2021-05-21 21:08:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:54,894 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:54,895 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:55,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-21 21:08:55,095 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:55,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:55,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2012461191, now seen corresponding path program 19 times [2021-05-21 21:08:55,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:55,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755943135] [2021-05-21 21:08:55,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:08:55,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:55,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755943135] [2021-05-21 21:08:55,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755943135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:55,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766116229] [2021-05-21 21:08:55,138 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 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 [2021-05-21 21:08:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:55,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:08:55,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:08:55,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766116229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:55,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:55,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-05-21 21:08:55,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674498623] [2021-05-21 21:08:55,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:08:55,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:55,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:08:55,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:08:55,198 INFO L87 Difference]: Start difference. First operand 24301 states and 86990 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:55,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:55,407 INFO L93 Difference]: Finished difference Result 24748 states and 88285 transitions. [2021-05-21 21:08:55,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:08:55,407 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:55,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:55,453 INFO L225 Difference]: With dead ends: 24748 [2021-05-21 21:08:55,454 INFO L226 Difference]: Without dead ends: 24675 [2021-05-21 21:08:55,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:08:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24675 states. [2021-05-21 21:08:55,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24675 to 24351. [2021-05-21 21:08:55,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24351 states, 24350 states have (on average 3.5791786447638603) internal successors, (87153), 24350 states have internal predecessors, (87153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24351 states to 24351 states and 87153 transitions. [2021-05-21 21:08:55,813 INFO L78 Accepts]: Start accepts. Automaton has 24351 states and 87153 transitions. Word has length 23 [2021-05-21 21:08:55,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:55,814 INFO L482 AbstractCegarLoop]: Abstraction has 24351 states and 87153 transitions. [2021-05-21 21:08:55,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 24351 states and 87153 transitions. [2021-05-21 21:08:55,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:55,840 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:55,840 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:56,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-21 21:08:56,040 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:56,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1545638063, now seen corresponding path program 20 times [2021-05-21 21:08:56,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:56,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155644833] [2021-05-21 21:08:56,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:08:56,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:56,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155644833] [2021-05-21 21:08:56,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155644833] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:56,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924101592] [2021-05-21 21:08:56,081 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 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 [2021-05-21 21:08:56,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:08:56,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:56,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:08:56,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:08:56,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924101592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:56,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:56,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-05-21 21:08:56,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148821241] [2021-05-21 21:08:56,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:08:56,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:56,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:08:56,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:08:56,138 INFO L87 Difference]: Start difference. First operand 24351 states and 87153 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:56,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:56,313 INFO L93 Difference]: Finished difference Result 24905 states and 88675 transitions. [2021-05-21 21:08:56,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:08:56,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:08:56,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:56,376 INFO L225 Difference]: With dead ends: 24905 [2021-05-21 21:08:56,376 INFO L226 Difference]: Without dead ends: 24844 [2021-05-21 21:08:56,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:08:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24844 states. [2021-05-21 21:08:56,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24844 to 24401. [2021-05-21 21:08:56,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24401 states, 24400 states have (on average 3.5781147540983604) internal successors, (87306), 24400 states have internal predecessors, (87306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24401 states to 24401 states and 87306 transitions. [2021-05-21 21:08:56,766 INFO L78 Accepts]: Start accepts. Automaton has 24401 states and 87306 transitions. Word has length 23 [2021-05-21 21:08:56,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:56,766 INFO L482 AbstractCegarLoop]: Abstraction has 24401 states and 87306 transitions. [2021-05-21 21:08:56,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:56,766 INFO L276 IsEmpty]: Start isEmpty. Operand 24401 states and 87306 transitions. [2021-05-21 21:08:56,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:56,796 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:56,796 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:57,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-21 21:08:57,011 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:57,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:57,011 INFO L82 PathProgramCache]: Analyzing trace with hash 322190439, now seen corresponding path program 45 times [2021-05-21 21:08:57,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:57,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947023569] [2021-05-21 21:08:57,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:57,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:57,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947023569] [2021-05-21 21:08:57,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947023569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:57,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989757925] [2021-05-21 21:08:57,034 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 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 [2021-05-21 21:08:57,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:08:57,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:57,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:08:57,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:57,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989757925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:57,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:57,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 21:08:57,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287605358] [2021-05-21 21:08:57,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:08:57,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:57,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:08:57,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:08:57,110 INFO L87 Difference]: Start difference. First operand 24401 states and 87306 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-05-21 21:08:57,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:08:57,471 INFO L93 Difference]: Finished difference Result 66091 states and 236252 transitions. [2021-05-21 21:08:57,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:08:57,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 23 [2021-05-21 21:08:57,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:08:57,644 INFO L225 Difference]: With dead ends: 66091 [2021-05-21 21:08:57,645 INFO L226 Difference]: Without dead ends: 66077 [2021-05-21 21:08:57,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:08:57,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66077 states. [2021-05-21 21:08:58,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66077 to 64280. [2021-05-21 21:08:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64280 states, 64279 states have (on average 3.5925574448886883) internal successors, (230926), 64279 states have internal predecessors, (230926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:08:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64280 states to 64280 states and 230926 transitions. [2021-05-21 21:08:59,222 INFO L78 Accepts]: Start accepts. Automaton has 64280 states and 230926 transitions. Word has length 23 [2021-05-21 21:08:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:08:59,222 INFO L482 AbstractCegarLoop]: Abstraction has 64280 states and 230926 transitions. [2021-05-21 21:08:59,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-05-21 21:08:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 64280 states and 230926 transitions. [2021-05-21 21:08:59,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:08:59,284 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:08:59,284 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:08:59,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-05-21 21:08:59,485 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:08:59,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:08:59,485 INFO L82 PathProgramCache]: Analyzing trace with hash 749275825, now seen corresponding path program 21 times [2021-05-21 21:08:59,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:08:59,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368537967] [2021-05-21 21:08:59,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:08:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:08:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:59,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:08:59,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368537967] [2021-05-21 21:08:59,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368537967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:59,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637300380] [2021-05-21 21:08:59,802 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 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 [2021-05-21 21:08:59,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:08:59,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:08:59,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:08:59,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:08:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:08:59,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637300380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:08:59,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:08:59,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-05-21 21:08:59,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410172668] [2021-05-21 21:08:59,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:08:59,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:08:59,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:08:59,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:08:59,865 INFO L87 Difference]: Start difference. First operand 64280 states and 230926 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:00,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:00,306 INFO L93 Difference]: Finished difference Result 64761 states and 232372 transitions. [2021-05-21 21:09:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:09:00,306 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 21:09:00,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:00,465 INFO L225 Difference]: With dead ends: 64761 [2021-05-21 21:09:00,465 INFO L226 Difference]: Without dead ends: 64712 [2021-05-21 21:09:00,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:09:00,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64712 states. [2021-05-21 21:09:01,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64712 to 64330. [2021-05-21 21:09:01,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64330 states, 64329 states have (on average 3.592516594382005) internal successors, (231103), 64329 states have internal predecessors, (231103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64330 states to 64330 states and 231103 transitions. [2021-05-21 21:09:01,774 INFO L78 Accepts]: Start accepts. Automaton has 64330 states and 231103 transitions. Word has length 23 [2021-05-21 21:09:01,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:01,774 INFO L482 AbstractCegarLoop]: Abstraction has 64330 states and 231103 transitions. [2021-05-21 21:09:01,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:01,774 INFO L276 IsEmpty]: Start isEmpty. Operand 64330 states and 231103 transitions. [2021-05-21 21:09:01,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:01,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:01,846 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:02,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-21 21:09:02,046 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:02,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:02,046 INFO L82 PathProgramCache]: Analyzing trace with hash -854673189, now seen corresponding path program 21 times [2021-05-21 21:09:02,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:02,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627661164] [2021-05-21 21:09:02,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:02,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:02,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627661164] [2021-05-21 21:09:02,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627661164] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:02,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891323204] [2021-05-21 21:09:02,081 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 [2021-05-21 21:09:02,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:09:02,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:02,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:09:02,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:02,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891323204] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:02,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:02,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:09:02,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228790500] [2021-05-21 21:09:02,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:09:02,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:02,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:09:02,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:09:02,149 INFO L87 Difference]: Start difference. First operand 64330 states and 231103 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-05-21 21:09:03,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:03,028 INFO L93 Difference]: Finished difference Result 123260 states and 445775 transitions. [2021-05-21 21:09:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:09:03,028 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 25 [2021-05-21 21:09:03,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:03,525 INFO L225 Difference]: With dead ends: 123260 [2021-05-21 21:09:03,525 INFO L226 Difference]: Without dead ends: 123260 [2021-05-21 21:09:03,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-05-21 21:09:03,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123260 states. [2021-05-21 21:09:04,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123260 to 75397. [2021-05-21 21:09:05,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75397 states, 75396 states have (on average 3.5951376730861053) internal successors, (271059), 75396 states have internal predecessors, (271059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:05,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75397 states to 75397 states and 271059 transitions. [2021-05-21 21:09:05,267 INFO L78 Accepts]: Start accepts. Automaton has 75397 states and 271059 transitions. Word has length 25 [2021-05-21 21:09:05,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:05,267 INFO L482 AbstractCegarLoop]: Abstraction has 75397 states and 271059 transitions. [2021-05-21 21:09:05,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-05-21 21:09:05,267 INFO L276 IsEmpty]: Start isEmpty. Operand 75397 states and 271059 transitions. [2021-05-21 21:09:05,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:05,605 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:05,605 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:05,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:09:05,819 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:05,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:05,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1488955305, now seen corresponding path program 46 times [2021-05-21 21:09:05,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:05,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514903711] [2021-05-21 21:09:05,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:05,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:05,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514903711] [2021-05-21 21:09:05,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514903711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:05,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248066593] [2021-05-21 21:09:05,883 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:09:05,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:09:05,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:05,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:09:05,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:09:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:05,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248066593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:05,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:05,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-05-21 21:09:05,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364633873] [2021-05-21 21:09:05,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:09:05,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:05,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:09:05,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:09:05,957 INFO L87 Difference]: Start difference. First operand 75397 states and 271059 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:06,418 INFO L93 Difference]: Finished difference Result 76364 states and 274028 transitions. [2021-05-21 21:09:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:09:06,419 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:06,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:06,832 INFO L225 Difference]: With dead ends: 76364 [2021-05-21 21:09:06,832 INFO L226 Difference]: Without dead ends: 76324 [2021-05-21 21:09:06,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:09:06,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76324 states. [2021-05-21 21:09:07,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76324 to 75532. [2021-05-21 21:09:08,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75532 states, 75531 states have (on average 3.5951993221326344) internal successors, (271549), 75531 states have internal predecessors, (271549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:08,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75532 states to 75532 states and 271549 transitions. [2021-05-21 21:09:08,246 INFO L78 Accepts]: Start accepts. Automaton has 75532 states and 271549 transitions. Word has length 25 [2021-05-21 21:09:08,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:08,246 INFO L482 AbstractCegarLoop]: Abstraction has 75532 states and 271549 transitions. [2021-05-21 21:09:08,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:08,246 INFO L276 IsEmpty]: Start isEmpty. Operand 75532 states and 271549 transitions. [2021-05-21 21:09:08,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:08,347 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:08,347 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:08,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:09:08,547 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:08,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:08,548 INFO L82 PathProgramCache]: Analyzing trace with hash 608516245, now seen corresponding path program 47 times [2021-05-21 21:09:08,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:08,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332764949] [2021-05-21 21:09:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:08,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:08,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332764949] [2021-05-21 21:09:08,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332764949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:08,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849908953] [2021-05-21 21:09:08,605 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 [2021-05-21 21:09:08,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:09:08,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:08,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:09:08,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:08,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849908953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:08,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:08,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-05-21 21:09:08,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120413469] [2021-05-21 21:09:08,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:09:08,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:08,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:09:08,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:09:08,666 INFO L87 Difference]: Start difference. First operand 75532 states and 271549 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:09,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:09,302 INFO L93 Difference]: Finished difference Result 77328 states and 277251 transitions. [2021-05-21 21:09:09,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:09:09,303 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:09,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:09,505 INFO L225 Difference]: With dead ends: 77328 [2021-05-21 21:09:09,505 INFO L226 Difference]: Without dead ends: 77263 [2021-05-21 21:09:09,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:09:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77263 states. [2021-05-21 21:09:10,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77263 to 75779. [2021-05-21 21:09:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75779 states, 75778 states have (on average 3.595476259600412) internal successors, (272458), 75778 states have internal predecessors, (272458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75779 states to 75779 states and 272458 transitions. [2021-05-21 21:09:11,193 INFO L78 Accepts]: Start accepts. Automaton has 75779 states and 272458 transitions. Word has length 25 [2021-05-21 21:09:11,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:11,193 INFO L482 AbstractCegarLoop]: Abstraction has 75779 states and 272458 transitions. [2021-05-21 21:09:11,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 75779 states and 272458 transitions. [2021-05-21 21:09:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:11,294 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:11,294 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:11,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:09:11,494 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:11,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:11,495 INFO L82 PathProgramCache]: Analyzing trace with hash -924915699, now seen corresponding path program 48 times [2021-05-21 21:09:11,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:11,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990446998] [2021-05-21 21:09:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:11,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:11,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990446998] [2021-05-21 21:09:11,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990446998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:11,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382214989] [2021-05-21 21:09:11,548 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 [2021-05-21 21:09:11,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:09:11,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:11,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:09:11,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:11,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382214989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:11,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:11,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:09:11,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981579324] [2021-05-21 21:09:11,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:09:11,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:11,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:09:11,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:09:11,621 INFO L87 Difference]: Start difference. First operand 75779 states and 272458 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:12,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:12,275 INFO L93 Difference]: Finished difference Result 77024 states and 276140 transitions. [2021-05-21 21:09:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:09:12,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:12,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:12,473 INFO L225 Difference]: With dead ends: 77024 [2021-05-21 21:09:12,473 INFO L226 Difference]: Without dead ends: 76999 [2021-05-21 21:09:12,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:09:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76999 states. [2021-05-21 21:09:13,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76999 to 75956. [2021-05-21 21:09:13,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75956 states, 75955 states have (on average 3.595707984991113) internal successors, (273112), 75955 states have internal predecessors, (273112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75956 states to 75956 states and 273112 transitions. [2021-05-21 21:09:13,990 INFO L78 Accepts]: Start accepts. Automaton has 75956 states and 273112 transitions. Word has length 25 [2021-05-21 21:09:13,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:13,990 INFO L482 AbstractCegarLoop]: Abstraction has 75956 states and 273112 transitions. [2021-05-21 21:09:13,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:13,990 INFO L276 IsEmpty]: Start isEmpty. Operand 75956 states and 273112 transitions. [2021-05-21 21:09:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:14,099 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:14,100 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:14,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-05-21 21:09:14,305 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:14,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:14,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1967521705, now seen corresponding path program 49 times [2021-05-21 21:09:14,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:14,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134627802] [2021-05-21 21:09:14,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:14,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:14,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134627802] [2021-05-21 21:09:14,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134627802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:14,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709276590] [2021-05-21 21:09:14,603 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 [2021-05-21 21:09:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:14,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:09:14,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:14,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709276590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:14,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:14,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:09:14,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462209727] [2021-05-21 21:09:14,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:09:14,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:14,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:09:14,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:09:14,738 INFO L87 Difference]: Start difference. First operand 75956 states and 273112 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:15,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:15,115 INFO L93 Difference]: Finished difference Result 77120 states and 276543 transitions. [2021-05-21 21:09:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:09:15,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:15,304 INFO L225 Difference]: With dead ends: 77120 [2021-05-21 21:09:15,304 INFO L226 Difference]: Without dead ends: 77074 [2021-05-21 21:09:15,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 293.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:09:15,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77074 states. [2021-05-21 21:09:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77074 to 76028. [2021-05-21 21:09:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76028 states, 76027 states have (on average 3.596209241453694) internal successors, (273409), 76027 states have internal predecessors, (273409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76028 states to 76028 states and 273409 transitions. [2021-05-21 21:09:17,078 INFO L78 Accepts]: Start accepts. Automaton has 76028 states and 273409 transitions. Word has length 25 [2021-05-21 21:09:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:17,079 INFO L482 AbstractCegarLoop]: Abstraction has 76028 states and 273409 transitions. [2021-05-21 21:09:17,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 76028 states and 273409 transitions. [2021-05-21 21:09:17,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:17,177 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:17,177 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:17,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:09:17,378 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:17,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:17,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1225531439, now seen corresponding path program 50 times [2021-05-21 21:09:17,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:17,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485206827] [2021-05-21 21:09:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:09:17,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:17,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485206827] [2021-05-21 21:09:17,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485206827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:17,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213712046] [2021-05-21 21:09:17,435 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 [2021-05-21 21:09:17,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:09:17,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:17,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:09:17,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:09:17,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213712046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:17,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:17,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-21 21:09:17,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265316415] [2021-05-21 21:09:17,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:09:17,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:17,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:09:17,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:09:17,508 INFO L87 Difference]: Start difference. First operand 76028 states and 273409 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:17,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:17,888 INFO L93 Difference]: Finished difference Result 77628 states and 278332 transitions. [2021-05-21 21:09:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:09:17,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:17,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:18,081 INFO L225 Difference]: With dead ends: 77628 [2021-05-21 21:09:18,081 INFO L226 Difference]: Without dead ends: 77580 [2021-05-21 21:09:18,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:09:18,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77580 states. [2021-05-21 21:09:19,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77580 to 76129. [2021-05-21 21:09:19,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76129 states, 76128 states have (on average 3.596876313577133) internal successors, (273823), 76128 states have internal predecessors, (273823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:19,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76129 states to 76129 states and 273823 transitions. [2021-05-21 21:09:19,926 INFO L78 Accepts]: Start accepts. Automaton has 76129 states and 273823 transitions. Word has length 25 [2021-05-21 21:09:19,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:19,926 INFO L482 AbstractCegarLoop]: Abstraction has 76129 states and 273823 transitions. [2021-05-21 21:09:19,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:19,926 INFO L276 IsEmpty]: Start isEmpty. Operand 76129 states and 273823 transitions. [2021-05-21 21:09:20,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:20,033 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:20,033 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:20,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-21 21:09:20,233 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:20,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:20,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1862961165, now seen corresponding path program 51 times [2021-05-21 21:09:20,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:20,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592047576] [2021-05-21 21:09:20,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:20,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:20,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592047576] [2021-05-21 21:09:20,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592047576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:20,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934195023] [2021-05-21 21:09:20,295 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 [2021-05-21 21:09:20,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:09:20,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:20,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:09:20,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:20,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934195023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:20,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:20,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-05-21 21:09:20,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923081471] [2021-05-21 21:09:20,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:09:20,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:20,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:09:20,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:09:20,357 INFO L87 Difference]: Start difference. First operand 76129 states and 273823 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:20,742 INFO L93 Difference]: Finished difference Result 79341 states and 284167 transitions. [2021-05-21 21:09:20,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:09:20,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:20,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:21,290 INFO L225 Difference]: With dead ends: 79341 [2021-05-21 21:09:21,291 INFO L226 Difference]: Without dead ends: 79297 [2021-05-21 21:09:21,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:09:21,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79297 states. [2021-05-21 21:09:22,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79297 to 76278. [2021-05-21 21:09:22,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76278 states, 76277 states have (on average 3.598096411762392) internal successors, (274452), 76277 states have internal predecessors, (274452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76278 states to 76278 states and 274452 transitions. [2021-05-21 21:09:22,665 INFO L78 Accepts]: Start accepts. Automaton has 76278 states and 274452 transitions. Word has length 25 [2021-05-21 21:09:22,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:22,665 INFO L482 AbstractCegarLoop]: Abstraction has 76278 states and 274452 transitions. [2021-05-21 21:09:22,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:22,665 INFO L276 IsEmpty]: Start isEmpty. Operand 76278 states and 274452 transitions. [2021-05-21 21:09:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:22,764 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:22,764 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:22,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-21 21:09:22,965 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:22,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:22,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1408824429, now seen corresponding path program 22 times [2021-05-21 21:09:22,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:22,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331513744] [2021-05-21 21:09:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:22,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:22,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331513744] [2021-05-21 21:09:22,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331513744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:22,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021853872] [2021-05-21 21:09:22,997 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 [2021-05-21 21:09:23,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:09:23,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:23,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:09:23,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:23,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021853872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:23,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:23,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:09:23,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769221085] [2021-05-21 21:09:23,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:09:23,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:23,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:09:23,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:09:23,072 INFO L87 Difference]: Start difference. First operand 76278 states and 274452 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-05-21 21:09:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:24,014 INFO L93 Difference]: Finished difference Result 98993 states and 359845 transitions. [2021-05-21 21:09:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:09:24,015 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:24,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:24,312 INFO L225 Difference]: With dead ends: 98993 [2021-05-21 21:09:24,312 INFO L226 Difference]: Without dead ends: 98979 [2021-05-21 21:09:24,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:09:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98979 states. [2021-05-21 21:09:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98979 to 21029. [2021-05-21 21:09:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21029 states, 21028 states have (on average 3.6255468898611376) internal successors, (76238), 21028 states have internal predecessors, (76238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:25,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21029 states to 21029 states and 76238 transitions. [2021-05-21 21:09:25,537 INFO L78 Accepts]: Start accepts. Automaton has 21029 states and 76238 transitions. Word has length 25 [2021-05-21 21:09:25,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:25,537 INFO L482 AbstractCegarLoop]: Abstraction has 21029 states and 76238 transitions. [2021-05-21 21:09:25,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-05-21 21:09:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 21029 states and 76238 transitions. [2021-05-21 21:09:25,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:25,563 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:25,564 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:25,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-21 21:09:25,764 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:25,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:25,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1278968941, now seen corresponding path program 23 times [2021-05-21 21:09:25,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:25,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593973203] [2021-05-21 21:09:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:25,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:25,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593973203] [2021-05-21 21:09:25,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593973203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:25,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248359894] [2021-05-21 21:09:25,800 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 [2021-05-21 21:09:25,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:09:25,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:25,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:09:25,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:25,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248359894] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:25,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:25,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 21:09:25,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465112668] [2021-05-21 21:09:25,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:09:25,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:25,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:09:25,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:09:25,890 INFO L87 Difference]: Start difference. First operand 21029 states and 76238 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:26,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:26,244 INFO L93 Difference]: Finished difference Result 52085 states and 187899 transitions. [2021-05-21 21:09:26,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:09:26,245 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:26,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:26,371 INFO L225 Difference]: With dead ends: 52085 [2021-05-21 21:09:26,371 INFO L226 Difference]: Without dead ends: 52085 [2021-05-21 21:09:26,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:09:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52085 states. [2021-05-21 21:09:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52085 to 48537. [2021-05-21 21:09:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48537 states, 48536 states have (on average 3.635569474204714) internal successors, (176456), 48536 states have internal predecessors, (176456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48537 states to 48537 states and 176456 transitions. [2021-05-21 21:09:27,590 INFO L78 Accepts]: Start accepts. Automaton has 48537 states and 176456 transitions. Word has length 25 [2021-05-21 21:09:27,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:27,590 INFO L482 AbstractCegarLoop]: Abstraction has 48537 states and 176456 transitions. [2021-05-21 21:09:27,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 48537 states and 176456 transitions. [2021-05-21 21:09:27,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:27,651 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:27,651 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:27,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-21 21:09:27,865 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:27,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:27,865 INFO L82 PathProgramCache]: Analyzing trace with hash -793164837, now seen corresponding path program 24 times [2021-05-21 21:09:27,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:27,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183681637] [2021-05-21 21:09:27,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:27,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:27,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183681637] [2021-05-21 21:09:27,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183681637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:27,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30131809] [2021-05-21 21:09:27,905 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 [2021-05-21 21:09:27,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:09:27,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:27,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:09:27,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:27,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30131809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:27,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:27,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 21:09:27,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26154811] [2021-05-21 21:09:27,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:09:27,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:27,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:09:27,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:09:27,993 INFO L87 Difference]: Start difference. First operand 48537 states and 176456 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:28,967 INFO L93 Difference]: Finished difference Result 60283 states and 218124 transitions. [2021-05-21 21:09:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:09:28,968 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:28,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:29,107 INFO L225 Difference]: With dead ends: 60283 [2021-05-21 21:09:29,108 INFO L226 Difference]: Without dead ends: 60283 [2021-05-21 21:09:29,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:09:29,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60283 states. [2021-05-21 21:09:29,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60283 to 48697. [2021-05-21 21:09:29,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48697 states, 48696 states have (on average 3.6408739937571872) internal successors, (177296), 48696 states have internal predecessors, (177296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:30,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48697 states to 48697 states and 177296 transitions. [2021-05-21 21:09:30,207 INFO L78 Accepts]: Start accepts. Automaton has 48697 states and 177296 transitions. Word has length 25 [2021-05-21 21:09:30,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:30,207 INFO L482 AbstractCegarLoop]: Abstraction has 48697 states and 177296 transitions. [2021-05-21 21:09:30,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:30,207 INFO L276 IsEmpty]: Start isEmpty. Operand 48697 states and 177296 transitions. [2021-05-21 21:09:30,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:30,277 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:30,277 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:30,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:09:30,487 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:30,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:30,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1183569831, now seen corresponding path program 52 times [2021-05-21 21:09:30,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:30,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784752777] [2021-05-21 21:09:30,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:30,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:30,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784752777] [2021-05-21 21:09:30,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784752777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:30,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890300752] [2021-05-21 21:09:30,557 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 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 [2021-05-21 21:09:30,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:09:30,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:30,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:09:30,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:30,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890300752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:30,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:30,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-21 21:09:30,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485911023] [2021-05-21 21:09:30,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:09:30,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:30,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:09:30,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:09:30,686 INFO L87 Difference]: Start difference. First operand 48697 states and 177296 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:31,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:31,129 INFO L93 Difference]: Finished difference Result 49947 states and 180898 transitions. [2021-05-21 21:09:31,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:09:31,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:31,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:31,255 INFO L225 Difference]: With dead ends: 49947 [2021-05-21 21:09:31,255 INFO L226 Difference]: Without dead ends: 49819 [2021-05-21 21:09:31,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:09:31,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49819 states. [2021-05-21 21:09:32,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49819 to 48821. [2021-05-21 21:09:32,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48821 states, 48820 states have (on average 3.6405981155264238) internal successors, (177734), 48820 states have internal predecessors, (177734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:32,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48821 states to 48821 states and 177734 transitions. [2021-05-21 21:09:32,242 INFO L78 Accepts]: Start accepts. Automaton has 48821 states and 177734 transitions. Word has length 25 [2021-05-21 21:09:32,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:32,242 INFO L482 AbstractCegarLoop]: Abstraction has 48821 states and 177734 transitions. [2021-05-21 21:09:32,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:32,242 INFO L276 IsEmpty]: Start isEmpty. Operand 48821 states and 177734 transitions. [2021-05-21 21:09:32,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:32,299 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:32,299 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:32,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:09:32,500 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:32,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:32,500 INFO L82 PathProgramCache]: Analyzing trace with hash -735311471, now seen corresponding path program 53 times [2021-05-21 21:09:32,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:32,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613041721] [2021-05-21 21:09:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:32,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:32,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613041721] [2021-05-21 21:09:32,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613041721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:32,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019867201] [2021-05-21 21:09:32,554 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 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 [2021-05-21 21:09:32,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:09:32,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:32,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:09:32,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:32,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019867201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:32,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:32,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-21 21:09:32,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063438400] [2021-05-21 21:09:32,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:09:32,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:32,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:09:32,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:09:32,676 INFO L87 Difference]: Start difference. First operand 48821 states and 177734 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:33,054 INFO L93 Difference]: Finished difference Result 49466 states and 179432 transitions. [2021-05-21 21:09:33,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:09:33,054 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:33,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:33,168 INFO L225 Difference]: With dead ends: 49466 [2021-05-21 21:09:33,168 INFO L226 Difference]: Without dead ends: 49403 [2021-05-21 21:09:33,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:09:33,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49403 states. [2021-05-21 21:09:34,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49403 to 48835. [2021-05-21 21:09:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48835 states, 48834 states have (on average 3.640312077650817) internal successors, (177771), 48834 states have internal predecessors, (177771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:34,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48835 states to 48835 states and 177771 transitions. [2021-05-21 21:09:34,201 INFO L78 Accepts]: Start accepts. Automaton has 48835 states and 177771 transitions. Word has length 25 [2021-05-21 21:09:34,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:34,201 INFO L482 AbstractCegarLoop]: Abstraction has 48835 states and 177771 transitions. [2021-05-21 21:09:34,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:34,201 INFO L276 IsEmpty]: Start isEmpty. Operand 48835 states and 177771 transitions. [2021-05-21 21:09:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:34,258 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:34,258 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:34,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-05-21 21:09:34,459 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:34,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:34,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1650392959, now seen corresponding path program 54 times [2021-05-21 21:09:34,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:34,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839276486] [2021-05-21 21:09:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:34,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:34,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839276486] [2021-05-21 21:09:34,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839276486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:34,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225412175] [2021-05-21 21:09:34,517 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 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 [2021-05-21 21:09:34,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:09:34,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:34,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:09:34,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:34,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225412175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:34,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:34,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 21:09:34,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835028499] [2021-05-21 21:09:34,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:09:34,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:34,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:09:34,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:09:34,888 INFO L87 Difference]: Start difference. First operand 48835 states and 177771 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:35,327 INFO L93 Difference]: Finished difference Result 50050 states and 181095 transitions. [2021-05-21 21:09:35,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:09:35,327 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:35,447 INFO L225 Difference]: With dead ends: 50050 [2021-05-21 21:09:35,447 INFO L226 Difference]: Without dead ends: 49977 [2021-05-21 21:09:35,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 394.2ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:09:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49977 states. [2021-05-21 21:09:36,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49977 to 48876. [2021-05-21 21:09:36,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48876 states, 48875 states have (on average 3.6402046035805626) internal successors, (177915), 48875 states have internal predecessors, (177915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:36,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48876 states to 48876 states and 177915 transitions. [2021-05-21 21:09:36,490 INFO L78 Accepts]: Start accepts. Automaton has 48876 states and 177915 transitions. Word has length 25 [2021-05-21 21:09:36,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:36,491 INFO L482 AbstractCegarLoop]: Abstraction has 48876 states and 177915 transitions. [2021-05-21 21:09:36,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:36,491 INFO L276 IsEmpty]: Start isEmpty. Operand 48876 states and 177915 transitions. [2021-05-21 21:09:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:36,555 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:36,555 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:36,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:09:36,756 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:36,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:36,756 INFO L82 PathProgramCache]: Analyzing trace with hash 697526461, now seen corresponding path program 55 times [2021-05-21 21:09:36,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:36,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916607603] [2021-05-21 21:09:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:36,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:36,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916607603] [2021-05-21 21:09:36,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916607603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:36,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431069446] [2021-05-21 21:09:36,844 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 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 [2021-05-21 21:09:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:36,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:09:36,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:36,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431069446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:36,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:36,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 21:09:36,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739683863] [2021-05-21 21:09:36,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:09:36,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:36,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:09:36,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:09:36,977 INFO L87 Difference]: Start difference. First operand 48876 states and 177915 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:37,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:37,452 INFO L93 Difference]: Finished difference Result 49588 states and 179721 transitions. [2021-05-21 21:09:37,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:09:37,452 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:37,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:37,567 INFO L225 Difference]: With dead ends: 49588 [2021-05-21 21:09:37,567 INFO L226 Difference]: Without dead ends: 49563 [2021-05-21 21:09:37,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:09:37,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49563 states. [2021-05-21 21:09:38,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49563 to 48888. [2021-05-21 21:09:38,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48888 states, 48887 states have (on average 3.6404770184302575) internal successors, (177972), 48887 states have internal predecessors, (177972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48888 states to 48888 states and 177972 transitions. [2021-05-21 21:09:38,526 INFO L78 Accepts]: Start accepts. Automaton has 48888 states and 177972 transitions. Word has length 25 [2021-05-21 21:09:38,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:38,526 INFO L482 AbstractCegarLoop]: Abstraction has 48888 states and 177972 transitions. [2021-05-21 21:09:38,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 48888 states and 177972 transitions. [2021-05-21 21:09:38,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:38,584 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:38,584 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:38,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-21 21:09:38,785 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:38,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:38,785 INFO L82 PathProgramCache]: Analyzing trace with hash 982042531, now seen corresponding path program 56 times [2021-05-21 21:09:38,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:38,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695657646] [2021-05-21 21:09:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:38,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:38,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695657646] [2021-05-21 21:09:38,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695657646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:38,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497509537] [2021-05-21 21:09:38,868 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 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 [2021-05-21 21:09:38,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:09:38,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:38,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:09:38,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:38,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497509537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:38,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:38,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-21 21:09:38,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911467732] [2021-05-21 21:09:38,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:09:38,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:38,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:09:38,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:09:38,983 INFO L87 Difference]: Start difference. First operand 48888 states and 177972 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:39,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:39,321 INFO L93 Difference]: Finished difference Result 50065 states and 181714 transitions. [2021-05-21 21:09:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:09:39,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:39,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:39,725 INFO L225 Difference]: With dead ends: 50065 [2021-05-21 21:09:39,725 INFO L226 Difference]: Without dead ends: 49947 [2021-05-21 21:09:39,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:09:39,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49947 states. [2021-05-21 21:09:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49947 to 49035. [2021-05-21 21:09:40,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49035 states, 49034 states have (on average 3.640331198760044) internal successors, (178500), 49034 states have internal predecessors, (178500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49035 states to 49035 states and 178500 transitions. [2021-05-21 21:09:40,476 INFO L78 Accepts]: Start accepts. Automaton has 49035 states and 178500 transitions. Word has length 25 [2021-05-21 21:09:40,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:40,477 INFO L482 AbstractCegarLoop]: Abstraction has 49035 states and 178500 transitions. [2021-05-21 21:09:40,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:40,477 INFO L276 IsEmpty]: Start isEmpty. Operand 49035 states and 178500 transitions. [2021-05-21 21:09:40,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:40,535 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:40,535 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:40,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:09:40,737 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:40,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:40,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1430300891, now seen corresponding path program 57 times [2021-05-21 21:09:40,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:40,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453859973] [2021-05-21 21:09:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:41,013 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-05-21 21:09:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:41,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:41,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453859973] [2021-05-21 21:09:41,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453859973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:41,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991226384] [2021-05-21 21:09:41,030 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 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 [2021-05-21 21:09:41,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:09:41,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:41,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:09:41,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:41,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991226384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:41,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:41,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-21 21:09:41,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398926436] [2021-05-21 21:09:41,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:09:41,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:41,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:09:41,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:09:41,154 INFO L87 Difference]: Start difference. First operand 49035 states and 178500 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:41,526 INFO L93 Difference]: Finished difference Result 49758 states and 180665 transitions. [2021-05-21 21:09:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:09:41,527 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:41,645 INFO L225 Difference]: With dead ends: 49758 [2021-05-21 21:09:41,645 INFO L226 Difference]: Without dead ends: 49695 [2021-05-21 21:09:41,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:09:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49695 states. [2021-05-21 21:09:42,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49695 to 49053. [2021-05-21 21:09:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49053 states, 49052 states have (on average 3.640218543586398) internal successors, (178560), 49052 states have internal predecessors, (178560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49053 states to 49053 states and 178560 transitions. [2021-05-21 21:09:42,687 INFO L78 Accepts]: Start accepts. Automaton has 49053 states and 178560 transitions. Word has length 25 [2021-05-21 21:09:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:42,687 INFO L482 AbstractCegarLoop]: Abstraction has 49053 states and 178560 transitions. [2021-05-21 21:09:42,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 49053 states and 178560 transitions. [2021-05-21 21:09:42,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:42,750 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:42,751 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:42,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-05-21 21:09:42,951 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:42,952 INFO L82 PathProgramCache]: Analyzing trace with hash 515219403, now seen corresponding path program 58 times [2021-05-21 21:09:42,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:42,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109326695] [2021-05-21 21:09:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:43,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:43,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109326695] [2021-05-21 21:09:43,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109326695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:43,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901924837] [2021-05-21 21:09:43,015 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 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 [2021-05-21 21:09:43,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:09:43,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:43,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:09:43,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:43,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901924837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:43,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:43,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-21 21:09:43,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150597548] [2021-05-21 21:09:43,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:09:43,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:43,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:09:43,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:09:43,154 INFO L87 Difference]: Start difference. First operand 49053 states and 178560 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:43,626 INFO L93 Difference]: Finished difference Result 50900 states and 184438 transitions. [2021-05-21 21:09:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:09:43,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:43,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:43,746 INFO L225 Difference]: With dead ends: 50900 [2021-05-21 21:09:43,746 INFO L226 Difference]: Without dead ends: 50875 [2021-05-21 21:09:43,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:09:43,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50875 states. [2021-05-21 21:09:44,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50875 to 49168. [2021-05-21 21:09:44,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49168 states, 49167 states have (on average 3.642280391319381) internal successors, (179080), 49167 states have internal predecessors, (179080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49168 states to 49168 states and 179080 transitions. [2021-05-21 21:09:44,771 INFO L78 Accepts]: Start accepts. Automaton has 49168 states and 179080 transitions. Word has length 25 [2021-05-21 21:09:44,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:44,771 INFO L482 AbstractCegarLoop]: Abstraction has 49168 states and 179080 transitions. [2021-05-21 21:09:44,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:44,771 INFO L276 IsEmpty]: Start isEmpty. Operand 49168 states and 179080 transitions. [2021-05-21 21:09:44,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:44,829 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:44,829 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:45,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-05-21 21:09:45,030 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:45,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:45,030 INFO L82 PathProgramCache]: Analyzing trace with hash -434468137, now seen corresponding path program 59 times [2021-05-21 21:09:45,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:45,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152287843] [2021-05-21 21:09:45,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:45,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:45,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152287843] [2021-05-21 21:09:45,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152287843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:45,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758674562] [2021-05-21 21:09:45,055 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 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 [2021-05-21 21:09:45,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:09:45,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:45,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:09:45,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:45,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758674562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:45,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:45,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-05-21 21:09:45,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035222620] [2021-05-21 21:09:45,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:09:45,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:45,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:09:45,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:09:45,145 INFO L87 Difference]: Start difference. First operand 49168 states and 179080 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:45,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:45,961 INFO L93 Difference]: Finished difference Result 92519 states and 337531 transitions. [2021-05-21 21:09:45,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:09:45,966 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:45,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:46,212 INFO L225 Difference]: With dead ends: 92519 [2021-05-21 21:09:46,213 INFO L226 Difference]: Without dead ends: 92495 [2021-05-21 21:09:46,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:09:46,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92495 states. [2021-05-21 21:09:47,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92495 to 90624. [2021-05-21 21:09:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90624 states, 90623 states have (on average 3.6490736347284907) internal successors, (330690), 90623 states have internal predecessors, (330690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90624 states to 90624 states and 330690 transitions. [2021-05-21 21:09:47,911 INFO L78 Accepts]: Start accepts. Automaton has 90624 states and 330690 transitions. Word has length 25 [2021-05-21 21:09:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:47,911 INFO L482 AbstractCegarLoop]: Abstraction has 90624 states and 330690 transitions. [2021-05-21 21:09:47,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:47,911 INFO L276 IsEmpty]: Start isEmpty. Operand 90624 states and 330690 transitions. [2021-05-21 21:09:48,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:48,031 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:48,031 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:48,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-21 21:09:48,232 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:48,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:48,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1866838691, now seen corresponding path program 60 times [2021-05-21 21:09:48,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:48,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119845469] [2021-05-21 21:09:48,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:48,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:48,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119845469] [2021-05-21 21:09:48,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119845469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:48,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010877033] [2021-05-21 21:09:48,670 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 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 [2021-05-21 21:09:48,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:09:48,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:48,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:09:48,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:48,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010877033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:48,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:48,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-05-21 21:09:48,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335989148] [2021-05-21 21:09:48,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:09:48,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:48,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:09:48,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:09:48,822 INFO L87 Difference]: Start difference. First operand 90624 states and 330690 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2021-05-21 21:09:49,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:49,659 INFO L93 Difference]: Finished difference Result 137171 states and 502327 transitions. [2021-05-21 21:09:49,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:09:49,663 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 25 [2021-05-21 21:09:49,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:50,054 INFO L225 Difference]: With dead ends: 137171 [2021-05-21 21:09:50,054 INFO L226 Difference]: Without dead ends: 137155 [2021-05-21 21:09:50,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 515.2ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-05-21 21:09:50,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137155 states. [2021-05-21 21:09:52,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137155 to 75753. [2021-05-21 21:09:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75753 states, 75752 states have (on average 3.641699229063259) internal successors, (275866), 75752 states have internal predecessors, (275866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75753 states to 75753 states and 275866 transitions. [2021-05-21 21:09:52,407 INFO L78 Accepts]: Start accepts. Automaton has 75753 states and 275866 transitions. Word has length 25 [2021-05-21 21:09:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:52,407 INFO L482 AbstractCegarLoop]: Abstraction has 75753 states and 275866 transitions. [2021-05-21 21:09:52,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2021-05-21 21:09:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 75753 states and 275866 transitions. [2021-05-21 21:09:52,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:52,509 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:52,509 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:52,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:09:52,709 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:52,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:52,710 INFO L82 PathProgramCache]: Analyzing trace with hash 2025324127, now seen corresponding path program 61 times [2021-05-21 21:09:52,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:52,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110644339] [2021-05-21 21:09:52,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:52,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:52,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110644339] [2021-05-21 21:09:52,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110644339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:52,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840602966] [2021-05-21 21:09:52,776 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 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 [2021-05-21 21:09:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:52,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:09:52,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:52,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840602966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:52,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:52,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-21 21:09:52,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037529198] [2021-05-21 21:09:52,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:09:52,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:52,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:09:52,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:09:52,869 INFO L87 Difference]: Start difference. First operand 75753 states and 275866 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:53,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:53,294 INFO L93 Difference]: Finished difference Result 76022 states and 276650 transitions. [2021-05-21 21:09:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:09:53,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:53,882 INFO L225 Difference]: With dead ends: 76022 [2021-05-21 21:09:53,882 INFO L226 Difference]: Without dead ends: 75973 [2021-05-21 21:09:53,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:09:53,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75973 states. [2021-05-21 21:09:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75973 to 75785. [2021-05-21 21:09:55,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75785 states, 75784 states have (on average 3.6417317639607303) internal successors, (275985), 75784 states have internal predecessors, (275985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75785 states to 75785 states and 275985 transitions. [2021-05-21 21:09:55,491 INFO L78 Accepts]: Start accepts. Automaton has 75785 states and 275985 transitions. Word has length 25 [2021-05-21 21:09:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:55,491 INFO L482 AbstractCegarLoop]: Abstraction has 75785 states and 275985 transitions. [2021-05-21 21:09:55,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 75785 states and 275985 transitions. [2021-05-21 21:09:55,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:55,594 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:55,594 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:55,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:09:55,794 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:55,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:55,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1144885067, now seen corresponding path program 62 times [2021-05-21 21:09:55,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:55,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109385363] [2021-05-21 21:09:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:55,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:55,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109385363] [2021-05-21 21:09:55,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109385363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:55,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820962724] [2021-05-21 21:09:55,853 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 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 [2021-05-21 21:09:55,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:09:55,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:55,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:09:55,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:55,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820962724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:55,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:55,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-21 21:09:55,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553544281] [2021-05-21 21:09:55,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:09:55,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:55,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:09:55,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:09:55,948 INFO L87 Difference]: Start difference. First operand 75785 states and 275985 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:56,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:56,409 INFO L93 Difference]: Finished difference Result 76818 states and 279184 transitions. [2021-05-21 21:09:56,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:09:56,410 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:56,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:56,603 INFO L225 Difference]: With dead ends: 76818 [2021-05-21 21:09:56,603 INFO L226 Difference]: Without dead ends: 76793 [2021-05-21 21:09:56,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:09:57,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76793 states. [2021-05-21 21:09:58,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76793 to 75828. [2021-05-21 21:09:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75828 states, 75827 states have (on average 3.6418821791710076) internal successors, (276153), 75827 states have internal predecessors, (276153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:58,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75828 states to 75828 states and 276153 transitions. [2021-05-21 21:09:58,471 INFO L78 Accepts]: Start accepts. Automaton has 75828 states and 276153 transitions. Word has length 25 [2021-05-21 21:09:58,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:09:58,471 INFO L482 AbstractCegarLoop]: Abstraction has 75828 states and 276153 transitions. [2021-05-21 21:09:58,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:58,471 INFO L276 IsEmpty]: Start isEmpty. Operand 75828 states and 276153 transitions. [2021-05-21 21:09:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:09:58,572 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:09:58,572 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:09:58,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:09:58,787 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:09:58,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:09:58,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1821384809, now seen corresponding path program 63 times [2021-05-21 21:09:58,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:09:58,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616407481] [2021-05-21 21:09:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:09:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:09:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:58,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:09:58,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616407481] [2021-05-21 21:09:58,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616407481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:58,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924526149] [2021-05-21 21:09:58,843 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 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 [2021-05-21 21:09:58,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:09:58,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:09:58,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:09:58,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:09:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:09:58,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924526149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:09:58,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:09:58,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-21 21:09:58,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97911380] [2021-05-21 21:09:58,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:09:58,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:09:58,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:09:58,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:09:58,942 INFO L87 Difference]: Start difference. First operand 75828 states and 276153 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:09:59,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:09:59,450 INFO L93 Difference]: Finished difference Result 76411 states and 277746 transitions. [2021-05-21 21:09:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:09:59,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:09:59,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:09:59,634 INFO L225 Difference]: With dead ends: 76411 [2021-05-21 21:09:59,634 INFO L226 Difference]: Without dead ends: 76386 [2021-05-21 21:09:59,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:10:00,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76386 states. [2021-05-21 21:10:01,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76386 to 75829. [2021-05-21 21:10:01,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75829 states, 75828 states have (on average 3.641966028380018) internal successors, (276163), 75828 states have internal predecessors, (276163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:01,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75829 states to 75829 states and 276163 transitions. [2021-05-21 21:10:01,422 INFO L78 Accepts]: Start accepts. Automaton has 75829 states and 276163 transitions. Word has length 25 [2021-05-21 21:10:01,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:01,422 INFO L482 AbstractCegarLoop]: Abstraction has 75829 states and 276163 transitions. [2021-05-21 21:10:01,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:01,422 INFO L276 IsEmpty]: Start isEmpty. Operand 75829 states and 276163 transitions. [2021-05-21 21:10:01,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:01,527 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:01,527 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:01,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:01,741 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:01,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:01,741 INFO L82 PathProgramCache]: Analyzing trace with hash -484157037, now seen corresponding path program 64 times [2021-05-21 21:10:01,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:01,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691332716] [2021-05-21 21:10:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:01,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:01,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691332716] [2021-05-21 21:10:01,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691332716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:01,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645874440] [2021-05-21 21:10:01,767 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 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 [2021-05-21 21:10:01,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:10:01,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:01,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:10:01,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:01,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645874440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:01,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:01,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-05-21 21:10:01,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795905158] [2021-05-21 21:10:01,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:10:01,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:01,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:10:01,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:10:01,844 INFO L87 Difference]: Start difference. First operand 75829 states and 276163 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:02,293 INFO L93 Difference]: Finished difference Result 81206 states and 294898 transitions. [2021-05-21 21:10:02,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:10:02,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:10:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:02,514 INFO L225 Difference]: With dead ends: 81206 [2021-05-21 21:10:02,514 INFO L226 Difference]: Without dead ends: 81196 [2021-05-21 21:10:02,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:10:02,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81196 states. [2021-05-21 21:10:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81196 to 77254. [2021-05-21 21:10:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77254 states, 77253 states have (on average 3.640311703105381) internal successors, (281225), 77253 states have internal predecessors, (281225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77254 states to 77254 states and 281225 transitions. [2021-05-21 21:10:04,578 INFO L78 Accepts]: Start accepts. Automaton has 77254 states and 281225 transitions. Word has length 25 [2021-05-21 21:10:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:04,578 INFO L482 AbstractCegarLoop]: Abstraction has 77254 states and 281225 transitions. [2021-05-21 21:10:04,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:04,578 INFO L276 IsEmpty]: Start isEmpty. Operand 77254 states and 281225 transitions. [2021-05-21 21:10:04,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:04,697 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:04,697 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:04,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-05-21 21:10:04,923 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:04,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:04,924 INFO L82 PathProgramCache]: Analyzing trace with hash 697625119, now seen corresponding path program 65 times [2021-05-21 21:10:04,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:04,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125029896] [2021-05-21 21:10:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:04,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:04,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125029896] [2021-05-21 21:10:04,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125029896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:04,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107985845] [2021-05-21 21:10:04,996 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:10:05,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:10:05,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:05,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:10:05,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:05,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107985845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:05,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:05,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-21 21:10:05,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250290286] [2021-05-21 21:10:05,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:10:05,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:05,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:10:05,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:10:05,115 INFO L87 Difference]: Start difference. First operand 77254 states and 281225 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-05-21 21:10:05,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:05,613 INFO L93 Difference]: Finished difference Result 77680 states and 282481 transitions. [2021-05-21 21:10:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:10:05,614 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 25 [2021-05-21 21:10:05,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:05,815 INFO L225 Difference]: With dead ends: 77680 [2021-05-21 21:10:05,815 INFO L226 Difference]: Without dead ends: 77600 [2021-05-21 21:10:05,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:10:05,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77600 states. [2021-05-21 21:10:07,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77600 to 77302. [2021-05-21 21:10:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77302 states, 77301 states have (on average 3.6403280682009287) internal successors, (281401), 77301 states have internal predecessors, (281401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77302 states to 77302 states and 281401 transitions. [2021-05-21 21:10:07,949 INFO L78 Accepts]: Start accepts. Automaton has 77302 states and 281401 transitions. Word has length 25 [2021-05-21 21:10:07,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:07,949 INFO L482 AbstractCegarLoop]: Abstraction has 77302 states and 281401 transitions. [2021-05-21 21:10:07,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-05-21 21:10:07,949 INFO L276 IsEmpty]: Start isEmpty. Operand 77302 states and 281401 transitions. [2021-05-21 21:10:08,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:08,058 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:08,059 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:08,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-05-21 21:10:08,266 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:08,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:08,266 INFO L82 PathProgramCache]: Analyzing trace with hash -182813941, now seen corresponding path program 66 times [2021-05-21 21:10:08,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:08,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652759446] [2021-05-21 21:10:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:08,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:08,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652759446] [2021-05-21 21:10:08,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652759446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:08,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949619456] [2021-05-21 21:10:08,353 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:10:08,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:10:08,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:08,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:10:08,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:08,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949619456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:08,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:08,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-21 21:10:08,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110252989] [2021-05-21 21:10:08,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:10:08,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:08,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:10:08,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:10:08,459 INFO L87 Difference]: Start difference. First operand 77302 states and 281401 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-05-21 21:10:08,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:08,965 INFO L93 Difference]: Finished difference Result 78459 states and 284976 transitions. [2021-05-21 21:10:08,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:10:08,966 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 25 [2021-05-21 21:10:08,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:09,195 INFO L225 Difference]: With dead ends: 78459 [2021-05-21 21:10:09,195 INFO L226 Difference]: Without dead ends: 78434 [2021-05-21 21:10:09,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:10:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78434 states. [2021-05-21 21:10:10,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78434 to 77307. [2021-05-21 21:10:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77307 states, 77306 states have (on average 3.640351331073914) internal successors, (281421), 77306 states have internal predecessors, (281421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77307 states to 77307 states and 281421 transitions. [2021-05-21 21:10:11,100 INFO L78 Accepts]: Start accepts. Automaton has 77307 states and 281421 transitions. Word has length 25 [2021-05-21 21:10:11,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:11,100 INFO L482 AbstractCegarLoop]: Abstraction has 77307 states and 281421 transitions. [2021-05-21 21:10:11,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-05-21 21:10:11,100 INFO L276 IsEmpty]: Start isEmpty. Operand 77307 states and 281421 transitions. [2021-05-21 21:10:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:11,211 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:11,211 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:11,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:11,411 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:11,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:11,412 INFO L82 PathProgramCache]: Analyzing trace with hash -780291045, now seen corresponding path program 67 times [2021-05-21 21:10:11,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:11,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81489547] [2021-05-21 21:10:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:11,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:11,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81489547] [2021-05-21 21:10:11,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81489547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:11,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398855695] [2021-05-21 21:10:11,481 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 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 [2021-05-21 21:10:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:11,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:10:11,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:11,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398855695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:11,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:11,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-21 21:10:11,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451319329] [2021-05-21 21:10:11,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:10:11,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:11,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:10:11,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:10:11,572 INFO L87 Difference]: Start difference. First operand 77307 states and 281421 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-05-21 21:10:12,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:12,046 INFO L93 Difference]: Finished difference Result 77563 states and 282160 transitions. [2021-05-21 21:10:12,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:10:12,046 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 25 [2021-05-21 21:10:12,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:12,253 INFO L225 Difference]: With dead ends: 77563 [2021-05-21 21:10:12,253 INFO L226 Difference]: Without dead ends: 77530 [2021-05-21 21:10:12,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:10:12,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77530 states. [2021-05-21 21:10:13,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77530 to 77315. [2021-05-21 21:10:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77315 states, 77314 states have (on average 3.640336808340016) internal successors, (281449), 77314 states have internal predecessors, (281449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:14,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77315 states to 77315 states and 281449 transitions. [2021-05-21 21:10:14,253 INFO L78 Accepts]: Start accepts. Automaton has 77315 states and 281449 transitions. Word has length 25 [2021-05-21 21:10:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:14,254 INFO L482 AbstractCegarLoop]: Abstraction has 77315 states and 281449 transitions. [2021-05-21 21:10:14,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-05-21 21:10:14,254 INFO L276 IsEmpty]: Start isEmpty. Operand 77315 states and 281449 transitions. [2021-05-21 21:10:14,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:14,362 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:14,362 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:14,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-05-21 21:10:14,562 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:14,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:14,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1817699061, now seen corresponding path program 68 times [2021-05-21 21:10:14,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:14,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232645253] [2021-05-21 21:10:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:14,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:14,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232645253] [2021-05-21 21:10:14,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232645253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:14,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340070550] [2021-05-21 21:10:14,643 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 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 [2021-05-21 21:10:14,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:10:14,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:14,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:10:14,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:14,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340070550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:14,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:14,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-21 21:10:14,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885859025] [2021-05-21 21:10:14,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:10:14,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:14,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:10:14,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:10:14,761 INFO L87 Difference]: Start difference. First operand 77315 states and 281449 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-05-21 21:10:15,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:15,284 INFO L93 Difference]: Finished difference Result 77659 states and 282390 transitions. [2021-05-21 21:10:15,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:10:15,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 25 [2021-05-21 21:10:15,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:15,493 INFO L225 Difference]: With dead ends: 77659 [2021-05-21 21:10:15,493 INFO L226 Difference]: Without dead ends: 77589 [2021-05-21 21:10:15,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:10:15,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2021-05-21 21:10:16,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 77279. [2021-05-21 21:10:17,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77279 states, 77278 states have (on average 3.63971634876679) internal successors, (281270), 77278 states have internal predecessors, (281270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:17,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77279 states to 77279 states and 281270 transitions. [2021-05-21 21:10:17,543 INFO L78 Accepts]: Start accepts. Automaton has 77279 states and 281270 transitions. Word has length 25 [2021-05-21 21:10:17,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:17,544 INFO L482 AbstractCegarLoop]: Abstraction has 77279 states and 281270 transitions. [2021-05-21 21:10:17,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-05-21 21:10:17,544 INFO L276 IsEmpty]: Start isEmpty. Operand 77279 states and 281270 transitions. [2021-05-21 21:10:17,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:17,652 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:17,652 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:17,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:17,852 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:17,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:17,853 INFO L82 PathProgramCache]: Analyzing trace with hash -376478069, now seen corresponding path program 69 times [2021-05-21 21:10:17,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:17,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316252202] [2021-05-21 21:10:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:17,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:17,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316252202] [2021-05-21 21:10:17,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316252202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:17,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785133229] [2021-05-21 21:10:17,936 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 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 [2021-05-21 21:10:17,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:10:17,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:17,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:17,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:18,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785133229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:18,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:18,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-21 21:10:18,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241048181] [2021-05-21 21:10:18,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:10:18,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:18,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:10:18,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:10:18,067 INFO L87 Difference]: Start difference. First operand 77279 states and 281270 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:18,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:18,750 INFO L93 Difference]: Finished difference Result 78113 states and 283706 transitions. [2021-05-21 21:10:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:10:18,750 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:10:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:18,957 INFO L225 Difference]: With dead ends: 78113 [2021-05-21 21:10:18,957 INFO L226 Difference]: Without dead ends: 78039 [2021-05-21 21:10:18,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:10:19,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78039 states. [2021-05-21 21:10:20,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78039 to 77471. [2021-05-21 21:10:20,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77471 states, 77470 states have (on average 3.638763392280883) internal successors, (281895), 77470 states have internal predecessors, (281895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:20,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77471 states to 77471 states and 281895 transitions. [2021-05-21 21:10:20,904 INFO L78 Accepts]: Start accepts. Automaton has 77471 states and 281895 transitions. Word has length 25 [2021-05-21 21:10:20,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:20,905 INFO L482 AbstractCegarLoop]: Abstraction has 77471 states and 281895 transitions. [2021-05-21 21:10:20,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 77471 states and 281895 transitions. [2021-05-21 21:10:21,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:21,011 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:21,012 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:21,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:21,212 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:21,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:21,213 INFO L82 PathProgramCache]: Analyzing trace with hash -181794737, now seen corresponding path program 70 times [2021-05-21 21:10:21,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:21,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680078908] [2021-05-21 21:10:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:21,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:21,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680078908] [2021-05-21 21:10:21,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680078908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:21,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423342406] [2021-05-21 21:10:21,314 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 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 [2021-05-21 21:10:21,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:10:21,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:21,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:10:21,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:21,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423342406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:21,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:21,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-21 21:10:21,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832684423] [2021-05-21 21:10:21,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:10:21,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:21,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:10:21,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:10:21,445 INFO L87 Difference]: Start difference. First operand 77471 states and 281895 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:22,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:22,139 INFO L93 Difference]: Finished difference Result 77694 states and 282349 transitions. [2021-05-21 21:10:22,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:10:22,139 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:10:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:22,331 INFO L225 Difference]: With dead ends: 77694 [2021-05-21 21:10:22,331 INFO L226 Difference]: Without dead ends: 77515 [2021-05-21 21:10:22,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 209.7ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:10:22,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77515 states. [2021-05-21 21:10:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77515 to 77439. [2021-05-21 21:10:23,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77439 states, 77438 states have (on average 3.6384075001937033) internal successors, (281751), 77438 states have internal predecessors, (281751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77439 states to 77439 states and 281751 transitions. [2021-05-21 21:10:24,177 INFO L78 Accepts]: Start accepts. Automaton has 77439 states and 281751 transitions. Word has length 25 [2021-05-21 21:10:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:24,177 INFO L482 AbstractCegarLoop]: Abstraction has 77439 states and 281751 transitions. [2021-05-21 21:10:24,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 77439 states and 281751 transitions. [2021-05-21 21:10:24,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:24,281 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:24,281 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:24,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:24,482 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:24,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:24,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1465003531, now seen corresponding path program 71 times [2021-05-21 21:10:24,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:24,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517546685] [2021-05-21 21:10:24,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:24,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:24,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517546685] [2021-05-21 21:10:24,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517546685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:24,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67812844] [2021-05-21 21:10:24,562 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 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 [2021-05-21 21:10:24,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:10:24,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:24,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:10:24,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:24,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67812844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:24,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:24,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 21:10:24,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549791080] [2021-05-21 21:10:24,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:10:24,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:24,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:10:24,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:10:24,674 INFO L87 Difference]: Start difference. First operand 77439 states and 281751 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:25,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:25,425 INFO L93 Difference]: Finished difference Result 79339 states and 287695 transitions. [2021-05-21 21:10:25,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:10:25,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:10:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:25,624 INFO L225 Difference]: With dead ends: 79339 [2021-05-21 21:10:25,625 INFO L226 Difference]: Without dead ends: 79274 [2021-05-21 21:10:25,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:10:26,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79274 states. [2021-05-21 21:10:27,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79274 to 77568. [2021-05-21 21:10:27,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77568 states, 77567 states have (on average 3.638802583572911) internal successors, (282251), 77567 states have internal predecessors, (282251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:27,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77568 states to 77568 states and 282251 transitions. [2021-05-21 21:10:27,464 INFO L78 Accepts]: Start accepts. Automaton has 77568 states and 282251 transitions. Word has length 25 [2021-05-21 21:10:27,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:27,464 INFO L482 AbstractCegarLoop]: Abstraction has 77568 states and 282251 transitions. [2021-05-21 21:10:27,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:27,465 INFO L276 IsEmpty]: Start isEmpty. Operand 77568 states and 282251 transitions. [2021-05-21 21:10:27,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:27,570 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:27,571 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:27,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:27,771 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:27,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:27,772 INFO L82 PathProgramCache]: Analyzing trace with hash 53335819, now seen corresponding path program 72 times [2021-05-21 21:10:27,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:27,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976779240] [2021-05-21 21:10:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:27,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:27,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976779240] [2021-05-21 21:10:27,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976779240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:27,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792117544] [2021-05-21 21:10:27,873 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 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 [2021-05-21 21:10:27,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:10:27,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:27,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:27,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:28,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792117544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:28,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:28,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:10:28,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767206785] [2021-05-21 21:10:28,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:10:28,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:28,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:10:28,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:10:28,022 INFO L87 Difference]: Start difference. First operand 77568 states and 282251 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:29,076 INFO L93 Difference]: Finished difference Result 94772 states and 343263 transitions. [2021-05-21 21:10:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:10:29,089 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:10:29,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:29,323 INFO L225 Difference]: With dead ends: 94772 [2021-05-21 21:10:29,323 INFO L226 Difference]: Without dead ends: 94731 [2021-05-21 21:10:29,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:10:29,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94731 states. [2021-05-21 21:10:30,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94731 to 77763. [2021-05-21 21:10:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77763 states, 77762 states have (on average 3.638486664437643) internal successors, (282936), 77762 states have internal predecessors, (282936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:31,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77763 states to 77763 states and 282936 transitions. [2021-05-21 21:10:31,044 INFO L78 Accepts]: Start accepts. Automaton has 77763 states and 282936 transitions. Word has length 25 [2021-05-21 21:10:31,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:31,044 INFO L482 AbstractCegarLoop]: Abstraction has 77763 states and 282936 transitions. [2021-05-21 21:10:31,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:31,044 INFO L276 IsEmpty]: Start isEmpty. Operand 77763 states and 282936 transitions. [2021-05-21 21:10:31,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:31,158 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:31,158 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:31,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-21 21:10:31,373 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:31,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:31,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1031893263, now seen corresponding path program 73 times [2021-05-21 21:10:31,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:31,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098232174] [2021-05-21 21:10:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:31,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:31,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098232174] [2021-05-21 21:10:31,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098232174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:31,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782178087] [2021-05-21 21:10:31,497 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 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 [2021-05-21 21:10:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:31,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:31,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:31,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782178087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:31,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:31,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:10:31,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445744424] [2021-05-21 21:10:31,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:10:31,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:31,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:10:31,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:10:31,646 INFO L87 Difference]: Start difference. First operand 77763 states and 282936 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-05-21 21:10:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:32,791 INFO L93 Difference]: Finished difference Result 94989 states and 343844 transitions. [2021-05-21 21:10:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:10:32,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 25 [2021-05-21 21:10:32,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:33,023 INFO L225 Difference]: With dead ends: 94989 [2021-05-21 21:10:33,024 INFO L226 Difference]: Without dead ends: 94948 [2021-05-21 21:10:33,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 319.4ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:10:33,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94948 states. [2021-05-21 21:10:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94948 to 77792. [2021-05-21 21:10:34,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77792 states, 77791 states have (on average 3.638647144271188) internal successors, (283054), 77791 states have internal predecessors, (283054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77792 states to 77792 states and 283054 transitions. [2021-05-21 21:10:34,860 INFO L78 Accepts]: Start accepts. Automaton has 77792 states and 283054 transitions. Word has length 25 [2021-05-21 21:10:34,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:34,860 INFO L482 AbstractCegarLoop]: Abstraction has 77792 states and 283054 transitions. [2021-05-21 21:10:34,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-05-21 21:10:34,861 INFO L276 IsEmpty]: Start isEmpty. Operand 77792 states and 283054 transitions. [2021-05-21 21:10:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:34,968 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:34,968 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:35,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:35,168 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash 232853259, now seen corresponding path program 74 times [2021-05-21 21:10:35,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:35,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633498144] [2021-05-21 21:10:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:35,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:35,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633498144] [2021-05-21 21:10:35,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633498144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:35,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669259352] [2021-05-21 21:10:35,283 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 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 [2021-05-21 21:10:35,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:10:35,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:35,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:35,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:35,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669259352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:35,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:35,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 21:10:35,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248498994] [2021-05-21 21:10:35,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:10:35,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:35,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:10:35,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:10:35,459 INFO L87 Difference]: Start difference. First operand 77792 states and 283054 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-05-21 21:10:37,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:37,048 INFO L93 Difference]: Finished difference Result 89830 states and 327389 transitions. [2021-05-21 21:10:37,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 21:10:37,048 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-05-21 21:10:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:37,306 INFO L225 Difference]: With dead ends: 89830 [2021-05-21 21:10:37,306 INFO L226 Difference]: Without dead ends: 89585 [2021-05-21 21:10:37,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 902.4ms TimeCoverageRelationStatistics Valid=384, Invalid=1422, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:10:37,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89585 states. [2021-05-21 21:10:38,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89585 to 77799. [2021-05-21 21:10:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77799 states, 77798 states have (on average 3.638962441193861) internal successors, (283104), 77798 states have internal predecessors, (283104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77799 states to 77799 states and 283104 transitions. [2021-05-21 21:10:39,390 INFO L78 Accepts]: Start accepts. Automaton has 77799 states and 283104 transitions. Word has length 25 [2021-05-21 21:10:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:39,390 INFO L482 AbstractCegarLoop]: Abstraction has 77799 states and 283104 transitions. [2021-05-21 21:10:39,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-05-21 21:10:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 77799 states and 283104 transitions. [2021-05-21 21:10:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:39,493 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:39,493 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:39,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:39,693 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:39,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:39,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1883882647, now seen corresponding path program 75 times [2021-05-21 21:10:39,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:39,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902224580] [2021-05-21 21:10:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:39,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:39,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902224580] [2021-05-21 21:10:39,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902224580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:39,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511035959] [2021-05-21 21:10:39,771 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 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 [2021-05-21 21:10:39,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:10:39,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:39,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:39,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:39,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511035959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:39,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:39,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-21 21:10:39,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428951066] [2021-05-21 21:10:39,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:10:39,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:39,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:10:39,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:10:39,913 INFO L87 Difference]: Start difference. First operand 77799 states and 283104 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:40,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:40,658 INFO L93 Difference]: Finished difference Result 94982 states and 344217 transitions. [2021-05-21 21:10:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:10:40,659 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:10:40,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:40,891 INFO L225 Difference]: With dead ends: 94982 [2021-05-21 21:10:40,891 INFO L226 Difference]: Without dead ends: 94949 [2021-05-21 21:10:40,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:10:41,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94949 states. [2021-05-21 21:10:42,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94949 to 77835. [2021-05-21 21:10:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77835 states, 77834 states have (on average 3.639579104247501) internal successors, (283283), 77834 states have internal predecessors, (283283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77835 states to 77835 states and 283283 transitions. [2021-05-21 21:10:42,749 INFO L78 Accepts]: Start accepts. Automaton has 77835 states and 283283 transitions. Word has length 25 [2021-05-21 21:10:42,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:42,749 INFO L482 AbstractCegarLoop]: Abstraction has 77835 states and 283283 transitions. [2021-05-21 21:10:42,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:42,749 INFO L276 IsEmpty]: Start isEmpty. Operand 77835 states and 283283 transitions. [2021-05-21 21:10:42,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:42,853 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:42,853 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:43,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:43,054 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:43,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:43,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1432527205, now seen corresponding path program 76 times [2021-05-21 21:10:43,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:43,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465988792] [2021-05-21 21:10:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:43,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:43,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465988792] [2021-05-21 21:10:43,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465988792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:43,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719725598] [2021-05-21 21:10:43,143 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 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 [2021-05-21 21:10:43,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:10:43,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:43,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:43,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:43,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719725598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:43,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:43,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:10:43,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587078614] [2021-05-21 21:10:43,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:10:43,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:43,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:10:43,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:10:43,296 INFO L87 Difference]: Start difference. First operand 77835 states and 283283 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-05-21 21:10:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:44,400 INFO L93 Difference]: Finished difference Result 95030 states and 344348 transitions. [2021-05-21 21:10:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:10:44,401 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 25 [2021-05-21 21:10:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:44,632 INFO L225 Difference]: With dead ends: 95030 [2021-05-21 21:10:44,632 INFO L226 Difference]: Without dead ends: 95001 [2021-05-21 21:10:44,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:10:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95001 states. [2021-05-21 21:10:46,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95001 to 77848. [2021-05-21 21:10:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77848 states, 77847 states have (on average 3.6396136010379334) internal successors, (283333), 77847 states have internal predecessors, (283333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77848 states to 77848 states and 283333 transitions. [2021-05-21 21:10:46,314 INFO L78 Accepts]: Start accepts. Automaton has 77848 states and 283333 transitions. Word has length 25 [2021-05-21 21:10:46,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:46,314 INFO L482 AbstractCegarLoop]: Abstraction has 77848 states and 283333 transitions. [2021-05-21 21:10:46,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-05-21 21:10:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 77848 states and 283333 transitions. [2021-05-21 21:10:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:46,422 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:46,422 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:46,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:46,638 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:46,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:46,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2063400087, now seen corresponding path program 77 times [2021-05-21 21:10:46,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:46,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61780878] [2021-05-21 21:10:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:46,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:46,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61780878] [2021-05-21 21:10:46,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61780878] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:46,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490809714] [2021-05-21 21:10:46,813 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 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 [2021-05-21 21:10:46,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:10:46,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:46,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:46,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:46,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490809714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:46,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:46,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:10:46,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265515925] [2021-05-21 21:10:47,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:10:47,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:47,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:10:47,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:10:47,017 INFO L87 Difference]: Start difference. First operand 77848 states and 283333 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-05-21 21:10:48,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:48,433 INFO L93 Difference]: Finished difference Result 88722 states and 324271 transitions. [2021-05-21 21:10:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 21:10:48,434 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-05-21 21:10:48,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:48,660 INFO L225 Difference]: With dead ends: 88722 [2021-05-21 21:10:48,661 INFO L226 Difference]: Without dead ends: 88697 [2021-05-21 21:10:48,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 643.4ms TimeCoverageRelationStatistics Valid=353, Invalid=1053, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:10:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88697 states. [2021-05-21 21:10:49,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88697 to 77835. [2021-05-21 21:10:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77835 states, 77834 states have (on average 3.639591952103194) internal successors, (283284), 77834 states have internal predecessors, (283284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77835 states to 77835 states and 283284 transitions. [2021-05-21 21:10:50,286 INFO L78 Accepts]: Start accepts. Automaton has 77835 states and 283284 transitions. Word has length 25 [2021-05-21 21:10:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:50,286 INFO L482 AbstractCegarLoop]: Abstraction has 77835 states and 283284 transitions. [2021-05-21 21:10:50,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-05-21 21:10:50,286 INFO L276 IsEmpty]: Start isEmpty. Operand 77835 states and 283284 transitions. [2021-05-21 21:10:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:50,393 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:50,393 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:50,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:50,597 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:50,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:50,597 INFO L82 PathProgramCache]: Analyzing trace with hash 781968495, now seen corresponding path program 78 times [2021-05-21 21:10:50,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:50,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802257824] [2021-05-21 21:10:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:50,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:50,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802257824] [2021-05-21 21:10:50,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802257824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:50,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188687343] [2021-05-21 21:10:50,679 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 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 [2021-05-21 21:10:50,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:10:50,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:50,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:50,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:50,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188687343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:50,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:50,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:10:50,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695079207] [2021-05-21 21:10:50,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:10:50,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:50,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:10:50,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:10:50,851 INFO L87 Difference]: Start difference. First operand 77835 states and 283284 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-05-21 21:10:51,321 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-05-21 21:10:52,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:52,065 INFO L93 Difference]: Finished difference Result 94397 states and 342391 transitions. [2021-05-21 21:10:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:10:52,066 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 25 [2021-05-21 21:10:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:52,296 INFO L225 Difference]: With dead ends: 94397 [2021-05-21 21:10:52,296 INFO L226 Difference]: Without dead ends: 94360 [2021-05-21 21:10:52,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 757.8ms TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:10:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94360 states. [2021-05-21 21:10:53,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94360 to 77898. [2021-05-21 21:10:53,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77898 states, 77897 states have (on average 3.6398449234245223) internal successors, (283533), 77897 states have internal predecessors, (283533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77898 states to 77898 states and 283533 transitions. [2021-05-21 21:10:54,320 INFO L78 Accepts]: Start accepts. Automaton has 77898 states and 283533 transitions. Word has length 25 [2021-05-21 21:10:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:54,320 INFO L482 AbstractCegarLoop]: Abstraction has 77898 states and 283533 transitions. [2021-05-21 21:10:54,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-05-21 21:10:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 77898 states and 283533 transitions. [2021-05-21 21:10:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:54,433 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:54,433 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:54,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:54,634 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:54,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:54,634 INFO L82 PathProgramCache]: Analyzing trace with hash -17071509, now seen corresponding path program 79 times [2021-05-21 21:10:54,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:54,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238532494] [2021-05-21 21:10:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:54,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:54,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238532494] [2021-05-21 21:10:54,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238532494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:54,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994315645] [2021-05-21 21:10:54,722 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 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 [2021-05-21 21:10:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:54,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:54,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:54,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994315645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:54,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:54,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:10:54,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786609424] [2021-05-21 21:10:54,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:10:54,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:54,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:10:54,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:10:54,901 INFO L87 Difference]: Start difference. First operand 77898 states and 283533 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-05-21 21:10:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:56,065 INFO L93 Difference]: Finished difference Result 106020 states and 385942 transitions. [2021-05-21 21:10:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 21:10:56,065 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-05-21 21:10:56,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:56,349 INFO L225 Difference]: With dead ends: 106020 [2021-05-21 21:10:56,350 INFO L226 Difference]: Without dead ends: 105968 [2021-05-21 21:10:56,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 669.0ms TimeCoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:10:56,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105968 states. [2021-05-21 21:10:57,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105968 to 77888. [2021-05-21 21:10:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77888 states, 77887 states have (on average 3.639901395611591) internal successors, (283501), 77887 states have internal predecessors, (283501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77888 states to 77888 states and 283501 transitions. [2021-05-21 21:10:58,266 INFO L78 Accepts]: Start accepts. Automaton has 77888 states and 283501 transitions. Word has length 25 [2021-05-21 21:10:58,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:58,266 INFO L482 AbstractCegarLoop]: Abstraction has 77888 states and 283501 transitions. [2021-05-21 21:10:58,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-05-21 21:10:58,267 INFO L276 IsEmpty]: Start isEmpty. Operand 77888 states and 283501 transitions. [2021-05-21 21:10:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:58,369 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:58,369 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:58,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-05-21 21:10:58,569 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:58,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:58,570 INFO L82 PathProgramCache]: Analyzing trace with hash -98470565, now seen corresponding path program 80 times [2021-05-21 21:10:58,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:58,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601848116] [2021-05-21 21:10:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:58,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:58,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601848116] [2021-05-21 21:10:58,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601848116] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:58,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521236423] [2021-05-21 21:10:58,643 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 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 [2021-05-21 21:10:58,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:10:58,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:58,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:58,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:58,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521236423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:58,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:58,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:10:58,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449552974] [2021-05-21 21:10:58,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:10:58,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:58,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:10:58,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:10:58,815 INFO L87 Difference]: Start difference. First operand 77888 states and 283501 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-05-21 21:11:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:00,167 INFO L93 Difference]: Finished difference Result 96396 states and 348721 transitions. [2021-05-21 21:11:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 21:11:00,168 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-05-21 21:11:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:00,411 INFO L225 Difference]: With dead ends: 96396 [2021-05-21 21:11:00,412 INFO L226 Difference]: Without dead ends: 96342 [2021-05-21 21:11:00,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 553.7ms TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:11:00,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96342 states. [2021-05-21 21:11:01,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96342 to 77888. [2021-05-21 21:11:01,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77888 states, 77887 states have (on average 3.6401581778730727) internal successors, (283521), 77887 states have internal predecessors, (283521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77888 states to 77888 states and 283521 transitions. [2021-05-21 21:11:02,126 INFO L78 Accepts]: Start accepts. Automaton has 77888 states and 283521 transitions. Word has length 25 [2021-05-21 21:11:02,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:02,127 INFO L482 AbstractCegarLoop]: Abstraction has 77888 states and 283521 transitions. [2021-05-21 21:11:02,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-05-21 21:11:02,127 INFO L276 IsEmpty]: Start isEmpty. Operand 77888 states and 283521 transitions. [2021-05-21 21:11:02,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:02,234 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:02,234 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:02,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:02,435 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:02,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:02,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1506823447, now seen corresponding path program 81 times [2021-05-21 21:11:02,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:02,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460001144] [2021-05-21 21:11:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:02,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:02,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460001144] [2021-05-21 21:11:02,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460001144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:02,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073601387] [2021-05-21 21:11:02,508 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 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 [2021-05-21 21:11:02,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:11:02,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:02,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:11:02,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:02,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073601387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:02,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:02,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-05-21 21:11:02,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594474906] [2021-05-21 21:11:02,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:11:02,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:02,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:11:02,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:11:02,646 INFO L87 Difference]: Start difference. First operand 77888 states and 283521 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-05-21 21:11:03,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:03,539 INFO L93 Difference]: Finished difference Result 85565 states and 309594 transitions. [2021-05-21 21:11:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:11:03,540 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-05-21 21:11:03,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:03,751 INFO L225 Difference]: With dead ends: 85565 [2021-05-21 21:11:03,751 INFO L226 Difference]: Without dead ends: 85370 [2021-05-21 21:11:03,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-05-21 21:11:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85370 states. [2021-05-21 21:11:05,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85370 to 78997. [2021-05-21 21:11:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78997 states, 78996 states have (on average 3.6391083092814824) internal successors, (287475), 78996 states have internal predecessors, (287475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78997 states to 78997 states and 287475 transitions. [2021-05-21 21:11:05,440 INFO L78 Accepts]: Start accepts. Automaton has 78997 states and 287475 transitions. Word has length 25 [2021-05-21 21:11:05,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:05,440 INFO L482 AbstractCegarLoop]: Abstraction has 78997 states and 287475 transitions. [2021-05-21 21:11:05,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-05-21 21:11:05,440 INFO L276 IsEmpty]: Start isEmpty. Operand 78997 states and 287475 transitions. [2021-05-21 21:11:05,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:05,547 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:05,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:05,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-05-21 21:11:05,747 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:05,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:05,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1345964487, now seen corresponding path program 82 times [2021-05-21 21:11:05,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:05,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323203523] [2021-05-21 21:11:05,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:05,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:05,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323203523] [2021-05-21 21:11:05,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323203523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:05,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174368424] [2021-05-21 21:11:05,805 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 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 [2021-05-21 21:11:05,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:11:05,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:05,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:11:05,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:06,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174368424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:06,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:06,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-21 21:11:06,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471608294] [2021-05-21 21:11:06,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:11:06,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:06,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:11:06,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:11:06,225 INFO L87 Difference]: Start difference. First operand 78997 states and 287475 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:06,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:06,655 INFO L93 Difference]: Finished difference Result 79701 states and 289399 transitions. [2021-05-21 21:11:06,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:11:06,656 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:11:06,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:06,854 INFO L225 Difference]: With dead ends: 79701 [2021-05-21 21:11:06,854 INFO L226 Difference]: Without dead ends: 79594 [2021-05-21 21:11:06,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:11:06,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79594 states. [2021-05-21 21:11:08,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79594 to 79080. [2021-05-21 21:11:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79080 states, 79079 states have (on average 3.634719710669078) internal successors, (287430), 79079 states have internal predecessors, (287430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79080 states to 79080 states and 287430 transitions. [2021-05-21 21:11:08,456 INFO L78 Accepts]: Start accepts. Automaton has 79080 states and 287430 transitions. Word has length 25 [2021-05-21 21:11:08,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:08,456 INFO L482 AbstractCegarLoop]: Abstraction has 79080 states and 287430 transitions. [2021-05-21 21:11:08,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:08,456 INFO L276 IsEmpty]: Start isEmpty. Operand 79080 states and 287430 transitions. [2021-05-21 21:11:08,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:08,560 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:08,560 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:08,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-05-21 21:11:08,761 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:08,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:08,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1425295639, now seen corresponding path program 83 times [2021-05-21 21:11:08,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:08,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148032825] [2021-05-21 21:11:08,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:08,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:08,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148032825] [2021-05-21 21:11:08,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148032825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:08,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656535625] [2021-05-21 21:11:08,811 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 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 [2021-05-21 21:11:08,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:11:08,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:08,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:11:08,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:08,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656535625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:08,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:08,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-21 21:11:08,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190130115] [2021-05-21 21:11:08,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:11:08,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:08,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:11:08,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:11:08,944 INFO L87 Difference]: Start difference. First operand 79080 states and 287430 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-05-21 21:11:10,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:10,429 INFO L93 Difference]: Finished difference Result 93002 states and 336576 transitions. [2021-05-21 21:11:10,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 21:11:10,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 25 [2021-05-21 21:11:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:10,661 INFO L225 Difference]: With dead ends: 93002 [2021-05-21 21:11:10,661 INFO L226 Difference]: Without dead ends: 92906 [2021-05-21 21:11:10,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 779.1ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:11:10,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92906 states. [2021-05-21 21:11:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92906 to 82584. [2021-05-21 21:11:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82584 states, 82583 states have (on average 3.6524829565406924) internal successors, (301633), 82583 states have internal predecessors, (301633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82584 states to 82584 states and 301633 transitions. [2021-05-21 21:11:12,788 INFO L78 Accepts]: Start accepts. Automaton has 82584 states and 301633 transitions. Word has length 25 [2021-05-21 21:11:12,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:12,788 INFO L482 AbstractCegarLoop]: Abstraction has 82584 states and 301633 transitions. [2021-05-21 21:11:12,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-05-21 21:11:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 82584 states and 301633 transitions. [2021-05-21 21:11:12,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:12,901 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:12,901 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:13,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-05-21 21:11:13,101 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:13,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:13,102 INFO L82 PathProgramCache]: Analyzing trace with hash 13627927, now seen corresponding path program 84 times [2021-05-21 21:11:13,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:13,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24939518] [2021-05-21 21:11:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:13,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:13,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24939518] [2021-05-21 21:11:13,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24939518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:13,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730226113] [2021-05-21 21:11:13,210 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 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 [2021-05-21 21:11:13,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:11:13,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:13,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:11:13,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:13,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730226113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:13,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:13,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:11:13,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646770311] [2021-05-21 21:11:13,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:11:13,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:13,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:11:13,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:11:13,346 INFO L87 Difference]: Start difference. First operand 82584 states and 301633 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:14,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:14,070 INFO L93 Difference]: Finished difference Result 101778 states and 369627 transitions. [2021-05-21 21:11:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:11:14,070 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:11:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:14,776 INFO L225 Difference]: With dead ends: 101778 [2021-05-21 21:11:14,776 INFO L226 Difference]: Without dead ends: 101745 [2021-05-21 21:11:14,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 326.4ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:11:14,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101745 states. [2021-05-21 21:11:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101745 to 82622. [2021-05-21 21:11:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82622 states, 82621 states have (on average 3.6528485494002734) internal successors, (301802), 82621 states have internal predecessors, (301802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:16,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82622 states to 82622 states and 301802 transitions. [2021-05-21 21:11:16,430 INFO L78 Accepts]: Start accepts. Automaton has 82622 states and 301802 transitions. Word has length 25 [2021-05-21 21:11:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:16,430 INFO L482 AbstractCegarLoop]: Abstraction has 82622 states and 301802 transitions. [2021-05-21 21:11:16,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 82622 states and 301802 transitions. [2021-05-21 21:11:16,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:16,544 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:16,544 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:16,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:16,744 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:16,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:16,745 INFO L82 PathProgramCache]: Analyzing trace with hash 992185371, now seen corresponding path program 85 times [2021-05-21 21:11:16,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:16,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556014136] [2021-05-21 21:11:16,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:16,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:16,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556014136] [2021-05-21 21:11:16,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556014136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:16,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012285790] [2021-05-21 21:11:16,833 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 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 [2021-05-21 21:11:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:16,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:11:16,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:16,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012285790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:16,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:16,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:11:17,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219297416] [2021-05-21 21:11:17,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:11:17,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:17,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:11:17,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:11:17,000 INFO L87 Difference]: Start difference. First operand 82622 states and 301802 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-05-21 21:11:18,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:18,208 INFO L93 Difference]: Finished difference Result 103177 states and 374373 transitions. [2021-05-21 21:11:18,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:11:18,209 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 25 [2021-05-21 21:11:18,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:18,514 INFO L225 Difference]: With dead ends: 103177 [2021-05-21 21:11:18,514 INFO L226 Difference]: Without dead ends: 103066 [2021-05-21 21:11:18,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 375.5ms TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:11:18,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103066 states. [2021-05-21 21:11:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103066 to 82700. [2021-05-21 21:11:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82700 states, 82699 states have (on average 3.653224343704277) internal successors, (302118), 82699 states have internal predecessors, (302118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82700 states to 82700 states and 302118 transitions. [2021-05-21 21:11:20,406 INFO L78 Accepts]: Start accepts. Automaton has 82700 states and 302118 transitions. Word has length 25 [2021-05-21 21:11:20,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:20,407 INFO L482 AbstractCegarLoop]: Abstraction has 82700 states and 302118 transitions. [2021-05-21 21:11:20,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-05-21 21:11:20,407 INFO L276 IsEmpty]: Start isEmpty. Operand 82700 states and 302118 transitions. [2021-05-21 21:11:20,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:20,518 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:20,518 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:20,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-05-21 21:11:20,719 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:20,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:20,719 INFO L82 PathProgramCache]: Analyzing trace with hash 193145367, now seen corresponding path program 86 times [2021-05-21 21:11:20,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:20,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303941085] [2021-05-21 21:11:20,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:20,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:20,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303941085] [2021-05-21 21:11:20,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303941085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:20,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136853698] [2021-05-21 21:11:20,804 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:11:21,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:21,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:21,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:11:21,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:21,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136853698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:21,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:21,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 21:11:21,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469274630] [2021-05-21 21:11:21,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:11:21,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:21,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:11:21,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:11:21,388 INFO L87 Difference]: Start difference. First operand 82700 states and 302118 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-05-21 21:11:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:22,228 INFO L93 Difference]: Finished difference Result 96794 states and 354161 transitions. [2021-05-21 21:11:22,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 21:11:22,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-05-21 21:11:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:22,471 INFO L225 Difference]: With dead ends: 96794 [2021-05-21 21:11:22,472 INFO L226 Difference]: Without dead ends: 96755 [2021-05-21 21:11:22,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 414.5ms TimeCoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:11:22,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96755 states. [2021-05-21 21:11:23,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96755 to 82707. [2021-05-21 21:11:24,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82707 states, 82706 states have (on average 3.6533987860614707) internal successors, (302158), 82706 states have internal predecessors, (302158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82707 states to 82707 states and 302158 transitions. [2021-05-21 21:11:24,593 INFO L78 Accepts]: Start accepts. Automaton has 82707 states and 302158 transitions. Word has length 25 [2021-05-21 21:11:24,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:24,593 INFO L482 AbstractCegarLoop]: Abstraction has 82707 states and 302158 transitions. [2021-05-21 21:11:24,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-05-21 21:11:24,593 INFO L276 IsEmpty]: Start isEmpty. Operand 82707 states and 302158 transitions. [2021-05-21 21:11:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:24,710 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:24,710 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:24,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-05-21 21:11:24,910 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:24,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:24,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1088286225, now seen corresponding path program 87 times [2021-05-21 21:11:24,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:24,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060813811] [2021-05-21 21:11:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:25,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:25,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060813811] [2021-05-21 21:11:25,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060813811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:25,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621029955] [2021-05-21 21:11:25,002 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 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 [2021-05-21 21:11:25,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:11:25,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:25,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:11:25,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:25,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621029955] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:25,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:25,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:11:25,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383890002] [2021-05-21 21:11:25,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:11:25,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:25,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:11:25,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:11:25,154 INFO L87 Difference]: Start difference. First operand 82707 states and 302158 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-05-21 21:11:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:26,119 INFO L93 Difference]: Finished difference Result 101984 states and 370229 transitions. [2021-05-21 21:11:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 21:11:26,119 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 25 [2021-05-21 21:11:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:26,683 INFO L225 Difference]: With dead ends: 101984 [2021-05-21 21:11:26,683 INFO L226 Difference]: Without dead ends: 101951 [2021-05-21 21:11:26,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 468.3ms TimeCoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:11:26,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101951 states. [2021-05-21 21:11:28,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101951 to 82749. [2021-05-21 21:11:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82749 states, 82748 states have (on average 3.6533209261855273) internal successors, (302305), 82748 states have internal predecessors, (302305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82749 states to 82749 states and 302305 transitions. [2021-05-21 21:11:28,350 INFO L78 Accepts]: Start accepts. Automaton has 82749 states and 302305 transitions. Word has length 25 [2021-05-21 21:11:28,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:28,350 INFO L482 AbstractCegarLoop]: Abstraction has 82749 states and 302305 transitions. [2021-05-21 21:11:28,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-05-21 21:11:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 82749 states and 302305 transitions. [2021-05-21 21:11:28,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:28,465 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:28,465 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:28,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:28,665 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:28,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:28,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1887326229, now seen corresponding path program 88 times [2021-05-21 21:11:28,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:28,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136202475] [2021-05-21 21:11:28,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:28,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:28,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136202475] [2021-05-21 21:11:28,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136202475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:28,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653933149] [2021-05-21 21:11:28,761 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 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 [2021-05-21 21:11:28,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:11:28,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:28,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:11:28,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:28,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653933149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:28,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:28,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 21:11:28,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349194725] [2021-05-21 21:11:28,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:11:28,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:28,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:11:28,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:11:28,917 INFO L87 Difference]: Start difference. First operand 82749 states and 302305 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-05-21 21:11:30,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:30,210 INFO L93 Difference]: Finished difference Result 115207 states and 419837 transitions. [2021-05-21 21:11:30,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 21:11:30,210 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-05-21 21:11:30,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:30,520 INFO L225 Difference]: With dead ends: 115207 [2021-05-21 21:11:30,521 INFO L226 Difference]: Without dead ends: 115157 [2021-05-21 21:11:30,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:11:30,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115157 states. [2021-05-21 21:11:32,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115157 to 82759. [2021-05-21 21:11:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82759 states, 82758 states have (on average 3.653821986998236) internal successors, (302383), 82758 states have internal predecessors, (302383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82759 states to 82759 states and 302383 transitions. [2021-05-21 21:11:32,834 INFO L78 Accepts]: Start accepts. Automaton has 82759 states and 302383 transitions. Word has length 25 [2021-05-21 21:11:32,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:32,834 INFO L482 AbstractCegarLoop]: Abstraction has 82759 states and 302383 transitions. [2021-05-21 21:11:32,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-05-21 21:11:32,834 INFO L276 IsEmpty]: Start isEmpty. Operand 82759 states and 302383 transitions. [2021-05-21 21:11:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:32,950 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:32,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:33,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-05-21 21:11:33,151 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:33,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:33,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1968725285, now seen corresponding path program 89 times [2021-05-21 21:11:33,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:33,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597822797] [2021-05-21 21:11:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:33,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:33,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597822797] [2021-05-21 21:11:33,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597822797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:33,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783617306] [2021-05-21 21:11:33,222 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 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 [2021-05-21 21:11:33,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:33,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:33,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:11:33,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:33,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783617306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:33,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:33,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 21:11:33,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335133249] [2021-05-21 21:11:33,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:11:33,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:33,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:11:33,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:11:33,408 INFO L87 Difference]: Start difference. First operand 82759 states and 302383 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-05-21 21:11:34,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:34,367 INFO L93 Difference]: Finished difference Result 101895 states and 369939 transitions. [2021-05-21 21:11:34,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 21:11:34,368 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-05-21 21:11:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:34,947 INFO L225 Difference]: With dead ends: 101895 [2021-05-21 21:11:34,947 INFO L226 Difference]: Without dead ends: 101841 [2021-05-21 21:11:34,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 488.6ms TimeCoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:11:35,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101841 states. [2021-05-21 21:11:36,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101841 to 82803. [2021-05-21 21:11:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82803 states, 82802 states have (on average 3.6542112509359677) internal successors, (302576), 82802 states have internal predecessors, (302576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82803 states to 82803 states and 302576 transitions. [2021-05-21 21:11:36,643 INFO L78 Accepts]: Start accepts. Automaton has 82803 states and 302576 transitions. Word has length 25 [2021-05-21 21:11:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:36,643 INFO L482 AbstractCegarLoop]: Abstraction has 82803 states and 302576 transitions. [2021-05-21 21:11:36,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-05-21 21:11:36,643 INFO L276 IsEmpty]: Start isEmpty. Operand 82803 states and 302576 transitions. [2021-05-21 21:11:36,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:36,761 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:36,761 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:36,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-05-21 21:11:36,972 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:36,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:36,972 INFO L82 PathProgramCache]: Analyzing trace with hash 118188467, now seen corresponding path program 90 times [2021-05-21 21:11:36,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:36,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306047397] [2021-05-21 21:11:36,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:37,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:37,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306047397] [2021-05-21 21:11:37,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306047397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:37,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493886086] [2021-05-21 21:11:37,072 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 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 [2021-05-21 21:11:37,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:11:37,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:37,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:11:37,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:37,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493886086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:37,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:37,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:11:37,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204519687] [2021-05-21 21:11:37,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:11:37,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:37,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:11:37,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:11:37,235 INFO L87 Difference]: Start difference. First operand 82803 states and 302576 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-05-21 21:11:38,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:38,479 INFO L93 Difference]: Finished difference Result 100879 states and 366869 transitions. [2021-05-21 21:11:38,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:11:38,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 25 [2021-05-21 21:11:38,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:38,743 INFO L225 Difference]: With dead ends: 100879 [2021-05-21 21:11:38,743 INFO L226 Difference]: Without dead ends: 100846 [2021-05-21 21:11:38,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 395.1ms TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:11:38,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100846 states. [2021-05-21 21:11:40,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100846 to 82884. [2021-05-21 21:11:40,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82884 states, 82883 states have (on average 3.6542958145820013) internal successors, (302879), 82883 states have internal predecessors, (302879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:40,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82884 states to 82884 states and 302879 transitions. [2021-05-21 21:11:40,608 INFO L78 Accepts]: Start accepts. Automaton has 82884 states and 302879 transitions. Word has length 25 [2021-05-21 21:11:40,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:40,608 INFO L482 AbstractCegarLoop]: Abstraction has 82884 states and 302879 transitions. [2021-05-21 21:11:40,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-05-21 21:11:40,608 INFO L276 IsEmpty]: Start isEmpty. Operand 82884 states and 302879 transitions. [2021-05-21 21:11:40,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:40,725 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:40,725 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:40,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:40,926 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:40,926 INFO L82 PathProgramCache]: Analyzing trace with hash -680851537, now seen corresponding path program 91 times [2021-05-21 21:11:40,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:40,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648839879] [2021-05-21 21:11:40,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:41,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:41,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648839879] [2021-05-21 21:11:41,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648839879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:41,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709918849] [2021-05-21 21:11:41,004 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 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 [2021-05-21 21:11:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:41,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:11:41,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:41,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709918849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:41,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:41,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 21:11:41,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161606961] [2021-05-21 21:11:41,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:11:41,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:41,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:11:41,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:11:41,546 INFO L87 Difference]: Start difference. First operand 82884 states and 302879 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-05-21 21:11:42,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:42,552 INFO L93 Difference]: Finished difference Result 114377 states and 417122 transitions. [2021-05-21 21:11:42,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:11:42,553 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-05-21 21:11:42,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:42,858 INFO L225 Difference]: With dead ends: 114377 [2021-05-21 21:11:42,858 INFO L226 Difference]: Without dead ends: 114327 [2021-05-21 21:11:42,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 784.1ms TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:11:42,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114327 states. [2021-05-21 21:11:44,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114327 to 82862. [2021-05-21 21:11:44,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82862 states, 82861 states have (on average 3.6543609176814185) internal successors, (302804), 82861 states have internal predecessors, (302804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:44,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82862 states to 82862 states and 302804 transitions. [2021-05-21 21:11:44,970 INFO L78 Accepts]: Start accepts. Automaton has 82862 states and 302804 transitions. Word has length 25 [2021-05-21 21:11:44,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:44,970 INFO L482 AbstractCegarLoop]: Abstraction has 82862 states and 302804 transitions. [2021-05-21 21:11:44,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-05-21 21:11:44,970 INFO L276 IsEmpty]: Start isEmpty. Operand 82862 states and 302804 transitions. [2021-05-21 21:11:45,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:45,085 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:45,085 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:45,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-05-21 21:11:45,285 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:45,285 INFO L82 PathProgramCache]: Analyzing trace with hash -762250593, now seen corresponding path program 92 times [2021-05-21 21:11:45,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:45,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345645551] [2021-05-21 21:11:45,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:45,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:45,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345645551] [2021-05-21 21:11:45,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345645551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:45,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068826151] [2021-05-21 21:11:45,351 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 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 [2021-05-21 21:11:45,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:45,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:45,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:11:45,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:45,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068826151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:45,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:45,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 21:11:45,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043945664] [2021-05-21 21:11:45,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:11:45,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:45,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:11:45,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:11:45,505 INFO L87 Difference]: Start difference. First operand 82862 states and 302804 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-05-21 21:11:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:46,668 INFO L93 Difference]: Finished difference Result 104310 states and 378454 transitions. [2021-05-21 21:11:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 21:11:46,668 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-05-21 21:11:46,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:46,936 INFO L225 Difference]: With dead ends: 104310 [2021-05-21 21:11:46,937 INFO L226 Difference]: Without dead ends: 104256 [2021-05-21 21:11:46,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 356.9ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:11:47,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104256 states. [2021-05-21 21:11:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104256 to 82924. [2021-05-21 21:11:48,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82924 states, 82923 states have (on average 3.6555599773283647) internal successors, (303130), 82923 states have internal predecessors, (303130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82924 states to 82924 states and 303130 transitions. [2021-05-21 21:11:48,729 INFO L78 Accepts]: Start accepts. Automaton has 82924 states and 303130 transitions. Word has length 25 [2021-05-21 21:11:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:48,729 INFO L482 AbstractCegarLoop]: Abstraction has 82924 states and 303130 transitions. [2021-05-21 21:11:48,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-05-21 21:11:48,729 INFO L276 IsEmpty]: Start isEmpty. Operand 82924 states and 303130 transitions. [2021-05-21 21:11:48,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:48,841 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:48,841 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:49,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-05-21 21:11:49,042 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:49,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:49,042 INFO L82 PathProgramCache]: Analyzing trace with hash -348634661, now seen corresponding path program 93 times [2021-05-21 21:11:49,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:49,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484434734] [2021-05-21 21:11:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:49,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:49,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484434734] [2021-05-21 21:11:49,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484434734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:49,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069703543] [2021-05-21 21:11:49,120 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 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 [2021-05-21 21:11:49,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:11:49,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:49,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:11:49,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:49,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069703543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:49,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:49,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 21:11:49,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553124538] [2021-05-21 21:11:49,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 21:11:49,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:49,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 21:11:49,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:11:49,297 INFO L87 Difference]: Start difference. First operand 82924 states and 303130 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-05-21 21:11:49,811 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-05-21 21:11:50,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:50,680 INFO L93 Difference]: Finished difference Result 104844 states and 380478 transitions. [2021-05-21 21:11:50,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 21:11:50,680 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-05-21 21:11:50,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:50,951 INFO L225 Difference]: With dead ends: 104844 [2021-05-21 21:11:50,951 INFO L226 Difference]: Without dead ends: 104794 [2021-05-21 21:11:50,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 822.5ms TimeCoverageRelationStatistics Valid=310, Invalid=1172, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:11:51,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104794 states. [2021-05-21 21:11:52,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104794 to 82938. [2021-05-21 21:11:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82938 states, 82937 states have (on average 3.656293331082629) internal successors, (303242), 82937 states have internal predecessors, (303242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82938 states to 82938 states and 303242 transitions. [2021-05-21 21:11:53,083 INFO L78 Accepts]: Start accepts. Automaton has 82938 states and 303242 transitions. Word has length 25 [2021-05-21 21:11:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:53,083 INFO L482 AbstractCegarLoop]: Abstraction has 82938 states and 303242 transitions. [2021-05-21 21:11:53,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-05-21 21:11:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 82938 states and 303242 transitions. [2021-05-21 21:11:53,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:53,196 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:53,196 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:53,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:53,397 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:53,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:53,397 INFO L82 PathProgramCache]: Analyzing trace with hash -540119201, now seen corresponding path program 94 times [2021-05-21 21:11:53,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:53,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842352445] [2021-05-21 21:11:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:53,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:53,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842352445] [2021-05-21 21:11:53,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842352445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:53,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39689968] [2021-05-21 21:11:53,449 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 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 [2021-05-21 21:11:53,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:11:53,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:53,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:11:53,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:53,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39689968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:53,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:53,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-21 21:11:53,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667713659] [2021-05-21 21:11:53,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:11:53,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:53,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:11:53,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:11:53,578 INFO L87 Difference]: Start difference. First operand 82938 states and 303242 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:54,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:54,157 INFO L93 Difference]: Finished difference Result 83638 states and 305189 transitions. [2021-05-21 21:11:54,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:11:54,158 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:11:54,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:54,363 INFO L225 Difference]: With dead ends: 83638 [2021-05-21 21:11:54,363 INFO L226 Difference]: Without dead ends: 83581 [2021-05-21 21:11:54,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 161.3ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:11:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83581 states. [2021-05-21 21:11:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83581 to 83002. [2021-05-21 21:11:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83002 states, 83001 states have (on average 3.6559680003855375) internal successors, (303449), 83001 states have internal predecessors, (303449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:56,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83002 states to 83002 states and 303449 transitions. [2021-05-21 21:11:56,328 INFO L78 Accepts]: Start accepts. Automaton has 83002 states and 303449 transitions. Word has length 25 [2021-05-21 21:11:56,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:56,328 INFO L482 AbstractCegarLoop]: Abstraction has 83002 states and 303449 transitions. [2021-05-21 21:11:56,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:56,328 INFO L276 IsEmpty]: Start isEmpty. Operand 83002 states and 303449 transitions. [2021-05-21 21:11:56,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:56,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:56,443 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:56,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-05-21 21:11:56,643 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:56,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:56,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1951786913, now seen corresponding path program 95 times [2021-05-21 21:11:56,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:56,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441851430] [2021-05-21 21:11:56,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:56,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:56,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441851430] [2021-05-21 21:11:56,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441851430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:56,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511296057] [2021-05-21 21:11:56,714 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 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 [2021-05-21 21:11:56,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:11:56,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:56,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:11:56,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:56,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511296057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:56,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:56,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-21 21:11:56,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273184242] [2021-05-21 21:11:56,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:11:56,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:56,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:11:56,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:11:56,846 INFO L87 Difference]: Start difference. First operand 83002 states and 303449 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:57,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:57,486 INFO L93 Difference]: Finished difference Result 101871 states and 370301 transitions. [2021-05-21 21:11:57,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:11:57,486 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:11:57,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:58,107 INFO L225 Difference]: With dead ends: 101871 [2021-05-21 21:11:58,108 INFO L226 Difference]: Without dead ends: 101820 [2021-05-21 21:11:58,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:11:58,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101820 states. [2021-05-21 21:11:59,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101820 to 83375. [2021-05-21 21:11:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83375 states, 83374 states have (on average 3.6553122076426705) internal successors, (304758), 83374 states have internal predecessors, (304758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83375 states to 83375 states and 304758 transitions. [2021-05-21 21:11:59,769 INFO L78 Accepts]: Start accepts. Automaton has 83375 states and 304758 transitions. Word has length 25 [2021-05-21 21:11:59,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:59,769 INFO L482 AbstractCegarLoop]: Abstraction has 83375 states and 304758 transitions. [2021-05-21 21:11:59,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:59,769 INFO L276 IsEmpty]: Start isEmpty. Operand 83375 states and 304758 transitions. [2021-05-21 21:11:59,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:59,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:59,881 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:00,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-05-21 21:12:00,081 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:00,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:00,082 INFO L82 PathProgramCache]: Analyzing trace with hash -973229469, now seen corresponding path program 96 times [2021-05-21 21:12:00,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:00,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555631727] [2021-05-21 21:12:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:00,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:00,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555631727] [2021-05-21 21:12:00,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555631727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:00,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052013824] [2021-05-21 21:12:00,183 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 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 [2021-05-21 21:12:00,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:12:00,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:00,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:12:00,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:00,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052013824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:00,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:00,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:12:00,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94142874] [2021-05-21 21:12:00,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:12:00,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:00,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:12:00,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:12:00,332 INFO L87 Difference]: Start difference. First operand 83375 states and 304758 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-05-21 21:12:01,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:01,479 INFO L93 Difference]: Finished difference Result 118493 states and 424280 transitions. [2021-05-21 21:12:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:12:01,479 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 25 [2021-05-21 21:12:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:01,779 INFO L225 Difference]: With dead ends: 118493 [2021-05-21 21:12:01,779 INFO L226 Difference]: Without dead ends: 118321 [2021-05-21 21:12:01,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:12:01,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118321 states. [2021-05-21 21:12:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118321 to 83375. [2021-05-21 21:12:03,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83375 states, 83374 states have (on average 3.6537769568450598) internal successors, (304630), 83374 states have internal predecessors, (304630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83375 states to 83375 states and 304630 transitions. [2021-05-21 21:12:04,158 INFO L78 Accepts]: Start accepts. Automaton has 83375 states and 304630 transitions. Word has length 25 [2021-05-21 21:12:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:04,159 INFO L482 AbstractCegarLoop]: Abstraction has 83375 states and 304630 transitions. [2021-05-21 21:12:04,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-05-21 21:12:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 83375 states and 304630 transitions. [2021-05-21 21:12:04,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:12:04,280 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:04,280 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:04,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:04,481 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:04,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:04,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1772269473, now seen corresponding path program 97 times [2021-05-21 21:12:04,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:04,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472783842] [2021-05-21 21:12:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:04,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:04,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472783842] [2021-05-21 21:12:04,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472783842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:04,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264499505] [2021-05-21 21:12:04,568 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 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 [2021-05-21 21:12:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:04,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:12:04,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:04,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264499505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:04,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:04,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:12:04,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522973187] [2021-05-21 21:12:04,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:12:04,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:04,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:12:04,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:12:04,731 INFO L87 Difference]: Start difference. First operand 83375 states and 304630 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-05-21 21:12:05,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:05,970 INFO L93 Difference]: Finished difference Result 107765 states and 385439 transitions. [2021-05-21 21:12:05,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 21:12:05,971 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-05-21 21:12:05,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:06,548 INFO L225 Difference]: With dead ends: 107765 [2021-05-21 21:12:06,548 INFO L226 Difference]: Without dead ends: 107423 [2021-05-21 21:12:06,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 621.1ms TimeCoverageRelationStatistics Valid=428, Invalid=1294, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 21:12:06,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107423 states. [2021-05-21 21:12:07,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107423 to 83439. [2021-05-21 21:12:08,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83439 states, 83438 states have (on average 3.6545938301493326) internal successors, (304932), 83438 states have internal predecessors, (304932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83439 states to 83439 states and 304932 transitions. [2021-05-21 21:12:08,248 INFO L78 Accepts]: Start accepts. Automaton has 83439 states and 304932 transitions. Word has length 25 [2021-05-21 21:12:08,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:08,248 INFO L482 AbstractCegarLoop]: Abstraction has 83439 states and 304932 transitions. [2021-05-21 21:12:08,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-05-21 21:12:08,248 INFO L276 IsEmpty]: Start isEmpty. Operand 83439 states and 304932 transitions. [2021-05-21 21:12:08,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:12:08,364 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:08,364 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:08,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-05-21 21:12:08,569 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:08,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:08,569 INFO L82 PathProgramCache]: Analyzing trace with hash -305853537, now seen corresponding path program 98 times [2021-05-21 21:12:08,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:08,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951868791] [2021-05-21 21:12:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:08,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:08,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951868791] [2021-05-21 21:12:08,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951868791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:08,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257482038] [2021-05-21 21:12:08,623 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 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 [2021-05-21 21:12:08,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:12:08,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:08,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:12:08,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:08,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257482038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:08,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:08,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-21 21:12:08,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664072799] [2021-05-21 21:12:08,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:12:08,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:08,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:12:08,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:12:08,732 INFO L87 Difference]: Start difference. First operand 83439 states and 304932 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:09,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:09,555 INFO L93 Difference]: Finished difference Result 85157 states and 310455 transitions. [2021-05-21 21:12:09,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:12:09,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:12:09,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:09,799 INFO L225 Difference]: With dead ends: 85157 [2021-05-21 21:12:09,799 INFO L226 Difference]: Without dead ends: 85092 [2021-05-21 21:12:09,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:12:09,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85092 states. [2021-05-21 21:12:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85092 to 84734. [2021-05-21 21:12:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84734 states, 84733 states have (on average 3.650643786954315) internal successors, (309330), 84733 states have internal predecessors, (309330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84734 states to 84734 states and 309330 transitions. [2021-05-21 21:12:11,471 INFO L78 Accepts]: Start accepts. Automaton has 84734 states and 309330 transitions. Word has length 25 [2021-05-21 21:12:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:11,471 INFO L482 AbstractCegarLoop]: Abstraction has 84734 states and 309330 transitions. [2021-05-21 21:12:11,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 84734 states and 309330 transitions. [2021-05-21 21:12:11,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:12:11,587 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:11,587 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:11,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-05-21 21:12:11,788 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:11,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:11,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1461906909, now seen corresponding path program 99 times [2021-05-21 21:12:11,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:11,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333850071] [2021-05-21 21:12:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:11,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:11,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333850071] [2021-05-21 21:12:11,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333850071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:11,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055918150] [2021-05-21 21:12:11,849 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 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 [2021-05-21 21:12:11,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:12:11,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:11,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 21:12:11,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:11,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055918150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:11,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:11,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-05-21 21:12:11,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958309787] [2021-05-21 21:12:11,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:12:11,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:11,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:12:11,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:12:11,968 INFO L87 Difference]: Start difference. First operand 84734 states and 309330 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-05-21 21:12:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:12,978 INFO L93 Difference]: Finished difference Result 87116 states and 316831 transitions. [2021-05-21 21:12:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 21:12:12,979 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 25 [2021-05-21 21:12:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:13,185 INFO L225 Difference]: With dead ends: 87116 [2021-05-21 21:12:13,185 INFO L226 Difference]: Without dead ends: 86937 [2021-05-21 21:12:13,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:12:13,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86937 states. [2021-05-21 21:12:14,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86937 to 84105. [2021-05-21 21:12:14,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84105 states, 84104 states have (on average 3.6505279178160372) internal successors, (307024), 84104 states have internal predecessors, (307024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84105 states to 84105 states and 307024 transitions. [2021-05-21 21:12:14,937 INFO L78 Accepts]: Start accepts. Automaton has 84105 states and 307024 transitions. Word has length 25 [2021-05-21 21:12:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:14,937 INFO L482 AbstractCegarLoop]: Abstraction has 84105 states and 307024 transitions. [2021-05-21 21:12:14,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-05-21 21:12:14,938 INFO L276 IsEmpty]: Start isEmpty. Operand 84105 states and 307024 transitions. [2021-05-21 21:12:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:12:15,052 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:15,052 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:15,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:15,253 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:15,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:15,253 INFO L82 PathProgramCache]: Analyzing trace with hash -426128515, now seen corresponding path program 100 times [2021-05-21 21:12:15,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:15,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900471705] [2021-05-21 21:12:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:15,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:15,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900471705] [2021-05-21 21:12:15,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900471705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:15,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571580680] [2021-05-21 21:12:15,323 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 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 [2021-05-21 21:12:15,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:12:15,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:15,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:12:15,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:15,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571580680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:15,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:15,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-05-21 21:12:15,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333716436] [2021-05-21 21:12:15,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:12:15,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:15,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:12:15,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:12:15,941 INFO L87 Difference]: Start difference. First operand 84105 states and 307024 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:16,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:16,565 INFO L93 Difference]: Finished difference Result 84705 states and 308613 transitions. [2021-05-21 21:12:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:12:16,565 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:12:16,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:16,792 INFO L225 Difference]: With dead ends: 84705 [2021-05-21 21:12:16,792 INFO L226 Difference]: Without dead ends: 84664 [2021-05-21 21:12:16,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 673.5ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:12:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84664 states. [2021-05-21 21:12:18,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84664 to 84321. [2021-05-21 21:12:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84321 states, 84320 states have (on average 3.6487073055028465) internal successors, (307659), 84320 states have internal predecessors, (307659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84321 states to 84321 states and 307659 transitions. [2021-05-21 21:12:18,530 INFO L78 Accepts]: Start accepts. Automaton has 84321 states and 307659 transitions. Word has length 25 [2021-05-21 21:12:18,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:18,530 INFO L482 AbstractCegarLoop]: Abstraction has 84321 states and 307659 transitions. [2021-05-21 21:12:18,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:18,530 INFO L276 IsEmpty]: Start isEmpty. Operand 84321 states and 307659 transitions. [2021-05-21 21:12:18,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:12:18,948 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:18,948 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:19,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:19,148 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:19,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:19,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1484388057, now seen corresponding path program 101 times [2021-05-21 21:12:19,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:19,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127827064] [2021-05-21 21:12:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:19,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:19,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127827064] [2021-05-21 21:12:19,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127827064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:19,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909625275] [2021-05-21 21:12:19,232 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 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 [2021-05-21 21:12:19,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:12:19,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:19,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:12:19,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:19,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909625275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:19,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:19,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-05-21 21:12:19,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186891445] [2021-05-21 21:12:19,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:12:19,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:19,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:12:19,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:12:19,346 INFO L87 Difference]: Start difference. First operand 84321 states and 307659 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:19,842 INFO L93 Difference]: Finished difference Result 84472 states and 308027 transitions. [2021-05-21 21:12:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:12:19,842 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:12:19,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:20,046 INFO L225 Difference]: With dead ends: 84472 [2021-05-21 21:12:20,046 INFO L226 Difference]: Without dead ends: 84409 [2021-05-21 21:12:20,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:12:20,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84409 states. [2021-05-21 21:12:21,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84409 to 84320. [2021-05-21 21:12:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84320 states, 84319 states have (on average 3.6487031392687297) internal successors, (307655), 84319 states have internal predecessors, (307655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:22,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84320 states to 84320 states and 307655 transitions. [2021-05-21 21:12:22,011 INFO L78 Accepts]: Start accepts. Automaton has 84320 states and 307655 transitions. Word has length 25 [2021-05-21 21:12:22,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:22,011 INFO L482 AbstractCegarLoop]: Abstraction has 84320 states and 307655 transitions. [2021-05-21 21:12:22,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 84320 states and 307655 transitions. [2021-05-21 21:12:22,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:12:22,138 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:22,138 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:22,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:22,338 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:22,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:22,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1814796211, now seen corresponding path program 102 times [2021-05-21 21:12:22,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:22,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943591408] [2021-05-21 21:12:22,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:22,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:22,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943591408] [2021-05-21 21:12:22,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943591408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:22,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885678731] [2021-05-21 21:12:22,424 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 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 [2021-05-21 21:12:22,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:12:22,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:22,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:12:22,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:22,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885678731] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:22,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:22,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-21 21:12:22,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712119623] [2021-05-21 21:12:22,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:12:22,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:22,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:12:22,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:12:22,563 INFO L87 Difference]: Start difference. First operand 84320 states and 307655 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-05-21 21:12:23,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:23,243 INFO L93 Difference]: Finished difference Result 102467 states and 372249 transitions. [2021-05-21 21:12:23,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:12:23,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-05-21 21:12:23,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:23,508 INFO L225 Difference]: With dead ends: 102467 [2021-05-21 21:12:23,508 INFO L226 Difference]: Without dead ends: 102393 [2021-05-21 21:12:23,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:12:23,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102393 states. [2021-05-21 21:12:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102393 to 84329. [2021-05-21 21:12:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84329 states, 84328 states have (on average 3.648728773361161) internal successors, (307690), 84328 states have internal predecessors, (307690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:25,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84329 states to 84329 states and 307690 transitions. [2021-05-21 21:12:25,588 INFO L78 Accepts]: Start accepts. Automaton has 84329 states and 307690 transitions. Word has length 25 [2021-05-21 21:12:25,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:25,589 INFO L482 AbstractCegarLoop]: Abstraction has 84329 states and 307690 transitions. [2021-05-21 21:12:25,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-05-21 21:12:25,589 INFO L276 IsEmpty]: Start isEmpty. Operand 84329 states and 307690 transitions. [2021-05-21 21:12:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:12:25,705 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:25,705 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:25,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:25,905 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:25,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1015756207, now seen corresponding path program 103 times [2021-05-21 21:12:25,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:25,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988284842] [2021-05-21 21:12:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:25,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:25,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988284842] [2021-05-21 21:12:25,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988284842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:25,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994407625] [2021-05-21 21:12:25,982 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 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 [2021-05-21 21:12:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:26,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:12:26,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:26,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994407625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:26,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:26,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:12:26,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862398689] [2021-05-21 21:12:26,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:12:26,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:26,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:12:26,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:12:26,151 INFO L87 Difference]: Start difference. First operand 84329 states and 307690 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-05-21 21:12:27,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:27,285 INFO L93 Difference]: Finished difference Result 114923 states and 419277 transitions. [2021-05-21 21:12:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:12:27,285 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 25 [2021-05-21 21:12:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:27,583 INFO L225 Difference]: With dead ends: 114923 [2021-05-21 21:12:27,584 INFO L226 Difference]: Without dead ends: 114877 [2021-05-21 21:12:27,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 342.3ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:12:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114877 states. [2021-05-21 21:12:29,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114877 to 84322. [2021-05-21 21:12:29,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84322 states, 84321 states have (on average 3.6487233310800393) internal successors, (307664), 84321 states have internal predecessors, (307664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:29,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84322 states to 84322 states and 307664 transitions. [2021-05-21 21:12:29,445 INFO L78 Accepts]: Start accepts. Automaton has 84322 states and 307664 transitions. Word has length 25 [2021-05-21 21:12:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:29,445 INFO L482 AbstractCegarLoop]: Abstraction has 84322 states and 307664 transitions. [2021-05-21 21:12:29,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-05-21 21:12:29,445 INFO L276 IsEmpty]: Start isEmpty. Operand 84322 states and 307664 transitions. [2021-05-21 21:12:29,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:12:29,562 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:29,562 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:29,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-05-21 21:12:29,762 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:29,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:29,762 INFO L82 PathProgramCache]: Analyzing trace with hash 777388195, now seen corresponding path program 104 times [2021-05-21 21:12:29,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:29,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032903395] [2021-05-21 21:12:29,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:29,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:29,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032903395] [2021-05-21 21:12:29,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032903395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:29,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318875154] [2021-05-21 21:12:29,844 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 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 [2021-05-21 21:12:29,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:12:29,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:29,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:12:29,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:30,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318875154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:30,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:30,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-05-21 21:12:30,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678983290] [2021-05-21 21:12:30,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:12:30,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:30,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:12:30,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:12:30,336 INFO L87 Difference]: Start difference. First operand 84322 states and 307664 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:30,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:30,852 INFO L93 Difference]: Finished difference Result 84652 states and 308467 transitions. [2021-05-21 21:12:30,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:12:30,852 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:12:30,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:31,060 INFO L225 Difference]: With dead ends: 84652 [2021-05-21 21:12:31,060 INFO L226 Difference]: Without dead ends: 84561 [2021-05-21 21:12:31,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:12:31,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84561 states. [2021-05-21 21:12:32,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84561 to 84306. [2021-05-21 21:12:32,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84306 states, 84305 states have (on average 3.647316292034873) internal successors, (307487), 84305 states have internal predecessors, (307487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84306 states to 84306 states and 307487 transitions. [2021-05-21 21:12:32,775 INFO L78 Accepts]: Start accepts. Automaton has 84306 states and 307487 transitions. Word has length 25 [2021-05-21 21:12:32,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:32,775 INFO L482 AbstractCegarLoop]: Abstraction has 84306 states and 307487 transitions. [2021-05-21 21:12:32,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:32,776 INFO L276 IsEmpty]: Start isEmpty. Operand 84306 states and 307487 transitions. [2021-05-21 21:12:33,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:12:33,141 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:33,141 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:33,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:33,346 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:33,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:33,346 INFO L82 PathProgramCache]: Analyzing trace with hash 664777499, now seen corresponding path program 105 times [2021-05-21 21:12:33,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:33,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958665225] [2021-05-21 21:12:33,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:33,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:33,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958665225] [2021-05-21 21:12:33,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958665225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:33,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692666576] [2021-05-21 21:12:33,443 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 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 [2021-05-21 21:12:33,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:12:33,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:33,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:12:33,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:12:33,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692666576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:33,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:33,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-05-21 21:12:33,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954159695] [2021-05-21 21:12:33,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:12:33,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:33,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:12:33,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:12:33,560 INFO L87 Difference]: Start difference. First operand 84306 states and 307487 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:34,204 INFO L93 Difference]: Finished difference Result 103449 states and 375574 transitions. [2021-05-21 21:12:34,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:12:34,204 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:12:34,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:34,479 INFO L225 Difference]: With dead ends: 103449 [2021-05-21 21:12:34,479 INFO L226 Difference]: Without dead ends: 103317 [2021-05-21 21:12:34,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:12:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103317 states. [2021-05-21 21:12:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103317 to 85017. [2021-05-21 21:12:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85017 states, 85016 states have (on average 3.644808036134375) internal successors, (309867), 85016 states have internal predecessors, (309867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:36,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85017 states to 85017 states and 309867 transitions. [2021-05-21 21:12:36,591 INFO L78 Accepts]: Start accepts. Automaton has 85017 states and 309867 transitions. Word has length 25 [2021-05-21 21:12:36,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:36,591 INFO L482 AbstractCegarLoop]: Abstraction has 85017 states and 309867 transitions. [2021-05-21 21:12:36,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:36,591 INFO L276 IsEmpty]: Start isEmpty. Operand 85017 states and 309867 transitions. [2021-05-21 21:12:36,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:12:36,707 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:36,708 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:36,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:36,908 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:36,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:36,908 INFO L82 PathProgramCache]: Analyzing trace with hash -134262505, now seen corresponding path program 106 times [2021-05-21 21:12:36,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:36,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478871851] [2021-05-21 21:12:36,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:37,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:37,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478871851] [2021-05-21 21:12:37,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478871851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:37,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899632113] [2021-05-21 21:12:37,001 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:12:37,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:12:37,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:37,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:12:37,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:12:37,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899632113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:37,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:37,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-05-21 21:12:37,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789513133] [2021-05-21 21:12:37,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:12:37,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:37,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:12:37,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:12:37,142 INFO L87 Difference]: Start difference. First operand 85017 states and 309867 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:38,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:38,263 INFO L93 Difference]: Finished difference Result 116231 states and 423805 transitions. [2021-05-21 21:12:38,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:12:38,264 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:12:38,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:38,586 INFO L225 Difference]: With dead ends: 116231 [2021-05-21 21:12:38,586 INFO L226 Difference]: Without dead ends: 116185 [2021-05-21 21:12:38,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:12:38,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116185 states. [2021-05-21 21:12:40,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116185 to 85004. [2021-05-21 21:12:40,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85004 states, 85003 states have (on average 3.644706657412091) internal successors, (309811), 85003 states have internal predecessors, (309811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85004 states to 85004 states and 309811 transitions. [2021-05-21 21:12:40,464 INFO L78 Accepts]: Start accepts. Automaton has 85004 states and 309811 transitions. Word has length 25 [2021-05-21 21:12:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:40,464 INFO L482 AbstractCegarLoop]: Abstraction has 85004 states and 309811 transitions. [2021-05-21 21:12:40,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:40,464 INFO L276 IsEmpty]: Start isEmpty. Operand 85004 states and 309811 transitions. [2021-05-21 21:12:40,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:12:40,587 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:40,587 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:40,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-05-21 21:12:40,788 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:40,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:40,788 INFO L82 PathProgramCache]: Analyzing trace with hash -394386371, now seen corresponding path program 107 times [2021-05-21 21:12:40,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:40,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119934398] [2021-05-21 21:12:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:40,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:40,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119934398] [2021-05-21 21:12:40,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119934398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:40,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377016416] [2021-05-21 21:12:40,869 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 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 [2021-05-21 21:12:40,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:12:40,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:40,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:12:40,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:12:41,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377016416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:41,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:41,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-05-21 21:12:41,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257128190] [2021-05-21 21:12:41,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:12:41,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:41,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:12:41,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:12:41,284 INFO L87 Difference]: Start difference. First operand 85004 states and 309811 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-05-21 21:12:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:41,777 INFO L93 Difference]: Finished difference Result 85225 states and 310318 transitions. [2021-05-21 21:12:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:12:41,777 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 25 [2021-05-21 21:12:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:41,984 INFO L225 Difference]: With dead ends: 85225 [2021-05-21 21:12:41,984 INFO L226 Difference]: Without dead ends: 85188 [2021-05-21 21:12:41,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:12:42,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85188 states. [2021-05-21 21:12:43,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85188 to 84839. [2021-05-21 21:12:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84839 states, 84838 states have (on average 3.645795516160211) internal successors, (309302), 84838 states have internal predecessors, (309302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:43,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84839 states to 84839 states and 309302 transitions. [2021-05-21 21:12:43,674 INFO L78 Accepts]: Start accepts. Automaton has 84839 states and 309302 transitions. Word has length 25 [2021-05-21 21:12:43,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:43,674 INFO L482 AbstractCegarLoop]: Abstraction has 84839 states and 309302 transitions. [2021-05-21 21:12:43,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-05-21 21:12:43,675 INFO L276 IsEmpty]: Start isEmpty. Operand 84839 states and 309302 transitions. [2021-05-21 21:12:44,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:12:44,054 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:44,054 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:44,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:44,281 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:44,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:44,281 INFO L82 PathProgramCache]: Analyzing trace with hash -372630517, now seen corresponding path program 108 times [2021-05-21 21:12:44,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:44,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435524534] [2021-05-21 21:12:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:44,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:44,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435524534] [2021-05-21 21:12:44,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435524534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:44,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326264577] [2021-05-21 21:12:44,360 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 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 [2021-05-21 21:12:44,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:12:44,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:44,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:12:44,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:12:44,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326264577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:44,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:44,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-05-21 21:12:44,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299543224] [2021-05-21 21:12:44,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:12:44,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:44,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:12:44,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:12:44,468 INFO L87 Difference]: Start difference. First operand 84839 states and 309302 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-05-21 21:12:44,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:44,973 INFO L93 Difference]: Finished difference Result 84942 states and 309502 transitions. [2021-05-21 21:12:44,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:12:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 25 [2021-05-21 21:12:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:45,188 INFO L225 Difference]: With dead ends: 84942 [2021-05-21 21:12:45,188 INFO L226 Difference]: Without dead ends: 84847 [2021-05-21 21:12:45,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:12:45,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84847 states. [2021-05-21 21:12:46,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84847 to 84780. [2021-05-21 21:12:46,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84780 states, 84779 states have (on average 3.643850481841022) internal successors, (308922), 84779 states have internal predecessors, (308922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84780 states to 84780 states and 308922 transitions. [2021-05-21 21:12:47,255 INFO L78 Accepts]: Start accepts. Automaton has 84780 states and 308922 transitions. Word has length 25 [2021-05-21 21:12:47,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:47,255 INFO L482 AbstractCegarLoop]: Abstraction has 84780 states and 308922 transitions. [2021-05-21 21:12:47,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-05-21 21:12:47,255 INFO L276 IsEmpty]: Start isEmpty. Operand 84780 states and 308922 transitions. [2021-05-21 21:12:47,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:12:47,377 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:47,377 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:47,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:47,577 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:47,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:47,578 INFO L82 PathProgramCache]: Analyzing trace with hash 445651607, now seen corresponding path program 109 times [2021-05-21 21:12:47,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:47,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883448465] [2021-05-21 21:12:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:47,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:47,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883448465] [2021-05-21 21:12:47,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883448465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:47,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344595433] [2021-05-21 21:12:47,639 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 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 [2021-05-21 21:12:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:47,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:12:47,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:47,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344595433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:47,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:47,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:12:47,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728056439] [2021-05-21 21:12:47,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:12:47,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:47,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:12:47,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:12:47,806 INFO L87 Difference]: Start difference. First operand 84780 states and 308922 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-05-21 21:12:48,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:48,556 INFO L93 Difference]: Finished difference Result 98741 states and 357653 transitions. [2021-05-21 21:12:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:12:48,556 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-05-21 21:12:48,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:48,824 INFO L225 Difference]: With dead ends: 98741 [2021-05-21 21:12:48,825 INFO L226 Difference]: Without dead ends: 98669 [2021-05-21 21:12:48,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 264.9ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:12:48,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98669 states. [2021-05-21 21:12:50,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98669 to 86019. [2021-05-21 21:12:50,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86019 states, 86018 states have (on average 3.643783859192262) internal successors, (313431), 86018 states have internal predecessors, (313431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:50,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86019 states to 86019 states and 313431 transitions. [2021-05-21 21:12:50,920 INFO L78 Accepts]: Start accepts. Automaton has 86019 states and 313431 transitions. Word has length 25 [2021-05-21 21:12:50,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:50,920 INFO L482 AbstractCegarLoop]: Abstraction has 86019 states and 313431 transitions. [2021-05-21 21:12:50,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-05-21 21:12:50,920 INFO L276 IsEmpty]: Start isEmpty. Operand 86019 states and 313431 transitions. [2021-05-21 21:12:51,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:12:51,037 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:51,037 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:51,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:51,238 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:51,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:51,238 INFO L82 PathProgramCache]: Analyzing trace with hash -743631491, now seen corresponding path program 110 times [2021-05-21 21:12:51,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:51,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716049621] [2021-05-21 21:12:51,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:51,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:51,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716049621] [2021-05-21 21:12:51,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716049621] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:51,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668676157] [2021-05-21 21:12:51,300 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 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 [2021-05-21 21:12:51,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:12:51,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:51,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 21:12:51,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:51,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668676157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:51,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:51,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-21 21:12:51,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708990801] [2021-05-21 21:12:51,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:12:51,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:51,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:12:51,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:12:51,405 INFO L87 Difference]: Start difference. First operand 86019 states and 313431 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:51,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:51,899 INFO L93 Difference]: Finished difference Result 86639 states and 315121 transitions. [2021-05-21 21:12:51,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:12:51,900 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:12:51,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:52,470 INFO L225 Difference]: With dead ends: 86639 [2021-05-21 21:12:52,470 INFO L226 Difference]: Without dead ends: 86578 [2021-05-21 21:12:52,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:12:52,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86578 states. [2021-05-21 21:12:53,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86578 to 86023. [2021-05-21 21:12:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86023 states, 86022 states have (on average 3.6426960544976867) internal successors, (313352), 86022 states have internal predecessors, (313352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:54,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86023 states to 86023 states and 313352 transitions. [2021-05-21 21:12:54,037 INFO L78 Accepts]: Start accepts. Automaton has 86023 states and 313352 transitions. Word has length 25 [2021-05-21 21:12:54,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:54,037 INFO L482 AbstractCegarLoop]: Abstraction has 86023 states and 313352 transitions. [2021-05-21 21:12:54,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:54,037 INFO L276 IsEmpty]: Start isEmpty. Operand 86023 states and 313352 transitions. [2021-05-21 21:12:54,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:12:54,157 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:54,157 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:54,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-05-21 21:12:54,358 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:54,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:54,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1565279795, now seen corresponding path program 25 times [2021-05-21 21:12:54,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:54,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297529638] [2021-05-21 21:12:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:54,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:54,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297529638] [2021-05-21 21:12:54,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297529638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:54,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996833580] [2021-05-21 21:12:54,387 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 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 [2021-05-21 21:12:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:54,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:12:54,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:54,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996833580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:54,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:54,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:12:54,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805393699] [2021-05-21 21:12:54,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:12:54,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:54,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:12:54,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:12:54,463 INFO L87 Difference]: Start difference. First operand 86023 states and 313352 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:55,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:55,740 INFO L93 Difference]: Finished difference Result 182520 states and 664068 transitions. [2021-05-21 21:12:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:12:55,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:12:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:56,229 INFO L225 Difference]: With dead ends: 182520 [2021-05-21 21:12:56,229 INFO L226 Difference]: Without dead ends: 182506 [2021-05-21 21:12:56,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:12:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182506 states. [2021-05-21 21:12:59,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182506 to 178615. [2021-05-21 21:12:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178615 states, 178614 states have (on average 3.650077821447367) internal successors, (651955), 178614 states have internal predecessors, (651955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178615 states to 178615 states and 651955 transitions. [2021-05-21 21:13:00,331 INFO L78 Accepts]: Start accepts. Automaton has 178615 states and 651955 transitions. Word has length 25 [2021-05-21 21:13:00,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:00,331 INFO L482 AbstractCegarLoop]: Abstraction has 178615 states and 651955 transitions. [2021-05-21 21:13:00,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 178615 states and 651955 transitions. [2021-05-21 21:13:00,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:13:00,531 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:00,531 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:00,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-05-21 21:13:00,731 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:00,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:00,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1079475691, now seen corresponding path program 26 times [2021-05-21 21:13:00,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:00,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167852185] [2021-05-21 21:13:00,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:00,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:00,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167852185] [2021-05-21 21:13:00,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167852185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:00,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774721115] [2021-05-21 21:13:00,760 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 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 [2021-05-21 21:13:00,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:13:00,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:00,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:13:00,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:00,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774721115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:00,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:00,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 21:13:00,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020650731] [2021-05-21 21:13:00,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:13:00,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:00,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:13:00,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:13:00,833 INFO L87 Difference]: Start difference. First operand 178615 states and 651955 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:02,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:02,853 INFO L93 Difference]: Finished difference Result 310258 states and 1130711 transitions. [2021-05-21 21:13:02,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:13:02,853 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:13:02,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:04,300 INFO L225 Difference]: With dead ends: 310258 [2021-05-21 21:13:04,300 INFO L226 Difference]: Without dead ends: 310258 [2021-05-21 21:13:04,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:13:04,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310258 states. [2021-05-21 21:13:09,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310258 to 307681. [2021-05-21 21:13:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307681 states, 307680 states have (on average 3.6506727769110765) internal successors, (1123239), 307680 states have internal predecessors, (1123239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:12,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307681 states to 307681 states and 1123239 transitions. [2021-05-21 21:13:12,146 INFO L78 Accepts]: Start accepts. Automaton has 307681 states and 1123239 transitions. Word has length 25 [2021-05-21 21:13:12,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:12,146 INFO L482 AbstractCegarLoop]: Abstraction has 307681 states and 1123239 transitions. [2021-05-21 21:13:12,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:12,146 INFO L276 IsEmpty]: Start isEmpty. Operand 307681 states and 1123239 transitions. [2021-05-21 21:13:12,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:13:12,559 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:12,559 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:12,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-05-21 21:13:12,775 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:12,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:12,775 INFO L82 PathProgramCache]: Analyzing trace with hash -373421423, now seen corresponding path program 27 times [2021-05-21 21:13:12,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:12,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383477151] [2021-05-21 21:13:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:12,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:12,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383477151] [2021-05-21 21:13:12,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383477151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:12,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131048276] [2021-05-21 21:13:12,804 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 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 [2021-05-21 21:13:12,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:13:12,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:12,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:13:12,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:12,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131048276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:12,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:12,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:13:12,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720131570] [2021-05-21 21:13:12,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:13:12,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:12,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:13:12,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:13:12,883 INFO L87 Difference]: Start difference. First operand 307681 states and 1123239 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-05-21 21:13:15,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:15,558 INFO L93 Difference]: Finished difference Result 315768 states and 1151589 transitions. [2021-05-21 21:13:15,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:13:15,559 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:13:15,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:17,386 INFO L225 Difference]: With dead ends: 315768 [2021-05-21 21:13:17,386 INFO L226 Difference]: Without dead ends: 315768 [2021-05-21 21:13:17,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:13:17,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315768 states. [2021-05-21 21:13:22,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315768 to 307781. [2021-05-21 21:13:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307781 states, 307780 states have (on average 3.6506400675807393) internal successors, (1123594), 307780 states have internal predecessors, (1123594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307781 states to 307781 states and 1123594 transitions. [2021-05-21 21:13:24,585 INFO L78 Accepts]: Start accepts. Automaton has 307781 states and 1123594 transitions. Word has length 25 [2021-05-21 21:13:24,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:24,585 INFO L482 AbstractCegarLoop]: Abstraction has 307781 states and 1123594 transitions. [2021-05-21 21:13:24,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-05-21 21:13:24,585 INFO L276 IsEmpty]: Start isEmpty. Operand 307781 states and 1123594 transitions. [2021-05-21 21:13:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:13:24,888 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:24,888 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:25,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:13:25,089 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:25,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:25,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1675135705, now seen corresponding path program 28 times [2021-05-21 21:13:25,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:25,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755514632] [2021-05-21 21:13:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:25,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:25,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755514632] [2021-05-21 21:13:25,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755514632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:25,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418515868] [2021-05-21 21:13:25,119 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 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 [2021-05-21 21:13:25,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:13:25,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:25,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:13:25,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:25,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418515868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:25,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:25,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:13:25,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357036025] [2021-05-21 21:13:25,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:13:25,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:25,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:13:25,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:13:25,186 INFO L87 Difference]: Start difference. First operand 307781 states and 1123594 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 21:13:28,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:28,204 INFO L93 Difference]: Finished difference Result 404675 states and 1471493 transitions. [2021-05-21 21:13:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:13:28,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 25 [2021-05-21 21:13:28,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:29,514 INFO L225 Difference]: With dead ends: 404675 [2021-05-21 21:13:29,515 INFO L226 Difference]: Without dead ends: 404675 [2021-05-21 21:13:29,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:13:30,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404675 states. [2021-05-21 21:13:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404675 to 328058. [2021-05-21 21:13:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328058 states, 328057 states have (on average 3.6505454844737346) internal successors, (1197587), 328057 states have internal predecessors, (1197587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328058 states to 328058 states and 1197587 transitions. [2021-05-21 21:13:38,039 INFO L78 Accepts]: Start accepts. Automaton has 328058 states and 1197587 transitions. Word has length 25 [2021-05-21 21:13:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:38,039 INFO L482 AbstractCegarLoop]: Abstraction has 328058 states and 1197587 transitions. [2021-05-21 21:13:38,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 21:13:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 328058 states and 1197587 transitions. [2021-05-21 21:13:38,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:13:38,361 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:38,361 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:38,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-05-21 21:13:38,576 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:38,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:38,576 INFO L82 PathProgramCache]: Analyzing trace with hash 910634069, now seen corresponding path program 29 times [2021-05-21 21:13:38,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:38,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760600857] [2021-05-21 21:13:38,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:38,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:38,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760600857] [2021-05-21 21:13:38,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760600857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:38,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695818958] [2021-05-21 21:13:38,608 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 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 [2021-05-21 21:13:38,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:13:38,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:38,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:13:38,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:39,327 WARN L205 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-05-21 21:13:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:39,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695818958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:39,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:39,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:13:39,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734241245] [2021-05-21 21:13:39,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:13:39,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:39,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:13:39,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:13:39,369 INFO L87 Difference]: Start difference. First operand 328058 states and 1197587 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-05-21 21:13:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:43,374 INFO L93 Difference]: Finished difference Result 638146 states and 2324169 transitions. [2021-05-21 21:13:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:13:43,375 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:13:43,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:46,103 INFO L225 Difference]: With dead ends: 638146 [2021-05-21 21:13:46,103 INFO L226 Difference]: Without dead ends: 638146 [2021-05-21 21:13:46,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 785.6ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:13:46,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638146 states. [2021-05-21 21:13:57,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638146 to 633057. [2021-05-21 21:13:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633057 states, 633056 states have (on average 3.6415419804882982) internal successors, (2305300), 633056 states have internal predecessors, (2305300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633057 states to 633057 states and 2305300 transitions. [2021-05-21 21:14:03,698 INFO L78 Accepts]: Start accepts. Automaton has 633057 states and 2305300 transitions. Word has length 25 [2021-05-21 21:14:03,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:03,698 INFO L482 AbstractCegarLoop]: Abstraction has 633057 states and 2305300 transitions. [2021-05-21 21:14:03,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-05-21 21:14:03,698 INFO L276 IsEmpty]: Start isEmpty. Operand 633057 states and 2305300 transitions. [2021-05-21 21:14:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:14:04,215 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:04,215 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forcibly destroying the process [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Rare case: The thread was killed right after we checked if it was killed and before we wanted to kill it manually [2021-05-21 21:14:04,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:04,812 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:04,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:04,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1396438173, now seen corresponding path program 30 times [2021-05-21 21:14:04,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:04,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843527939] [2021-05-21 21:14:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:04,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:04,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843527939] [2021-05-21 21:14:04,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843527939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:04,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457977476] [2021-05-21 21:14:04,844 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 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 [2021-05-21 21:14:04,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:14:04,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:04,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:14:04,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:04,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457977476] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:04,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:04,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-21 21:14:04,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360378301] [2021-05-21 21:14:04,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:14:04,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:04,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:14:04,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:14:04,909 INFO L87 Difference]: Start difference. First operand 633057 states and 2305300 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-05-21 21:14:09,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:09,534 INFO L93 Difference]: Finished difference Result 745515 states and 2707335 transitions. [2021-05-21 21:14:09,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:14:09,535 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:14:09,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:12,675 INFO L225 Difference]: With dead ends: 745515 [2021-05-21 21:14:12,675 INFO L226 Difference]: Without dead ends: 745515 [2021-05-21 21:14:12,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:14:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745515 states. [2021-05-21 21:14:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745515 to 684267. [2021-05-21 21:14:27,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684267 states, 684266 states have (on average 3.6362379542458636) internal successors, (2488154), 684266 states have internal predecessors, (2488154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:32,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684267 states to 684267 states and 2488154 transitions. [2021-05-21 21:14:32,075 INFO L78 Accepts]: Start accepts. Automaton has 684267 states and 2488154 transitions. Word has length 25 [2021-05-21 21:14:32,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:32,076 INFO L482 AbstractCegarLoop]: Abstraction has 684267 states and 2488154 transitions. [2021-05-21 21:14:32,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-05-21 21:14:32,076 INFO L276 IsEmpty]: Start isEmpty. Operand 684267 states and 2488154 transitions. [2021-05-21 21:14:33,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:14:33,624 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:33,624 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:33,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:33,833 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:33,833 INFO L82 PathProgramCache]: Analyzing trace with hash 759971319, now seen corresponding path program 31 times [2021-05-21 21:14:33,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:33,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213274616] [2021-05-21 21:14:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:33,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:33,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213274616] [2021-05-21 21:14:33,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213274616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:33,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465415010] [2021-05-21 21:14:33,865 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 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 [2021-05-21 21:14:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:33,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:14:33,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:33,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465415010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:33,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:33,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:14:33,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441193841] [2021-05-21 21:14:33,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:14:33,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:33,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:14:33,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:14:33,931 INFO L87 Difference]: Start difference. First operand 684267 states and 2488154 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:39,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:39,909 INFO L93 Difference]: Finished difference Result 688116 states and 2501277 transitions. [2021-05-21 21:14:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:14:39,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:14:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:43,528 INFO L225 Difference]: With dead ends: 688116 [2021-05-21 21:14:43,529 INFO L226 Difference]: Without dead ends: 688116 [2021-05-21 21:14:43,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:14:44,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688116 states. [2021-05-21 21:14:58,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688116 to 684289. [2021-05-21 21:14:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684289 states, 684288 states have (on average 3.6362189604377106) internal successors, (2488221), 684288 states have internal predecessors, (2488221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:05,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684289 states to 684289 states and 2488221 transitions. [2021-05-21 21:15:05,103 INFO L78 Accepts]: Start accepts. Automaton has 684289 states and 2488221 transitions. Word has length 25 [2021-05-21 21:15:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:05,144 INFO L482 AbstractCegarLoop]: Abstraction has 684289 states and 2488221 transitions. [2021-05-21 21:15:05,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:05,145 INFO L276 IsEmpty]: Start isEmpty. Operand 684289 states and 2488221 transitions. [2021-05-21 21:15:06,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:15:06,176 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:06,176 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:06,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-05-21 21:15:06,392 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:06,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:06,392 INFO L82 PathProgramCache]: Analyzing trace with hash -326436511, now seen corresponding path program 111 times [2021-05-21 21:15:06,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:06,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286761832] [2021-05-21 21:15:06,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:06,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:06,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286761832] [2021-05-21 21:15:06,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286761832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:06,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132020791] [2021-05-21 21:15:06,452 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 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 [2021-05-21 21:15:06,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:15:06,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:06,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:15:06,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:06,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132020791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:06,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:06,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-21 21:15:06,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969976388] [2021-05-21 21:15:06,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:15:06,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:06,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:15:06,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:15:06,603 INFO L87 Difference]: Start difference. First operand 684289 states and 2488221 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:12,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:12,199 INFO L93 Difference]: Finished difference Result 687113 states and 2497284 transitions. [2021-05-21 21:15:12,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:15:12,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:15:12,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:14,722 INFO L225 Difference]: With dead ends: 687113 [2021-05-21 21:15:14,722 INFO L226 Difference]: Without dead ends: 687038 [2021-05-21 21:15:14,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:15:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687038 states. [2021-05-21 21:15:29,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687038 to 684882. [2021-05-21 21:15:30,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684882 states, 684881 states have (on average 3.6360594030203788) internal successors, (2490268), 684881 states have internal predecessors, (2490268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684882 states to 684882 states and 2490268 transitions. [2021-05-21 21:15:36,927 INFO L78 Accepts]: Start accepts. Automaton has 684882 states and 2490268 transitions. Word has length 25 [2021-05-21 21:15:36,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:36,927 INFO L482 AbstractCegarLoop]: Abstraction has 684882 states and 2490268 transitions. [2021-05-21 21:15:36,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:36,927 INFO L276 IsEmpty]: Start isEmpty. Operand 684882 states and 2490268 transitions. [2021-05-21 21:15:37,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:15:37,727 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:37,727 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:37,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:15:37,943 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:37,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:37,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1241517999, now seen corresponding path program 112 times [2021-05-21 21:15:37,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:37,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569236222] [2021-05-21 21:15:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:37,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:37,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569236222] [2021-05-21 21:15:37,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569236222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:37,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375469187] [2021-05-21 21:15:37,998 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 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 [2021-05-21 21:15:38,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:15:38,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:38,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:15:38,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:38,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375469187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:38,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:38,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-21 21:15:38,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957338746] [2021-05-21 21:15:38,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:15:38,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:38,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:15:38,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:15:38,111 INFO L87 Difference]: Start difference. First operand 684882 states and 2490268 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:43,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:43,665 INFO L93 Difference]: Finished difference Result 690033 states and 2507264 transitions. [2021-05-21 21:15:43,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:15:43,668 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:15:43,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:46,921 INFO L225 Difference]: With dead ends: 690033 [2021-05-21 21:15:46,921 INFO L226 Difference]: Without dead ends: 690008 [2021-05-21 21:15:46,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 267.8ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:15:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690008 states. [2021-05-21 21:16:01,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690008 to 685088. [2021-05-21 21:16:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685088 states, 685087 states have (on average 3.6364344966405726) internal successors, (2491274), 685087 states have internal predecessors, (2491274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685088 states to 685088 states and 2491274 transitions. [2021-05-21 21:16:07,542 INFO L78 Accepts]: Start accepts. Automaton has 685088 states and 2491274 transitions. Word has length 25 [2021-05-21 21:16:07,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:07,542 INFO L482 AbstractCegarLoop]: Abstraction has 685088 states and 2491274 transitions. [2021-05-21 21:16:07,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:07,542 INFO L276 IsEmpty]: Start isEmpty. Operand 685088 states and 2491274 transitions. [2021-05-21 21:16:08,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:16:08,753 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:08,753 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:08,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:08,954 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:08,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:08,954 INFO L82 PathProgramCache]: Analyzing trace with hash 2103761757, now seen corresponding path program 113 times [2021-05-21 21:16:08,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:08,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297890424] [2021-05-21 21:16:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:08,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:08,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297890424] [2021-05-21 21:16:08,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297890424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:08,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894655876] [2021-05-21 21:16:08,978 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 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 [2021-05-21 21:16:09,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:16:09,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:09,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:16:09,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:09,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894655876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:09,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:09,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-05-21 21:16:09,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415580343] [2021-05-21 21:16:09,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:16:09,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:09,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:16:09,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:16:09,061 INFO L87 Difference]: Start difference. First operand 685088 states and 2491274 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:17,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:17,003 INFO L93 Difference]: Finished difference Result 1083545 states and 3960729 transitions. [2021-05-21 21:16:17,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:16:17,005 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:16:17,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:24,173 INFO L225 Difference]: With dead ends: 1083545 [2021-05-21 21:16:24,173 INFO L226 Difference]: Without dead ends: 1083519 [2021-05-21 21:16:24,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:16:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083519 states. [2021-05-21 21:16:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083519 to 953614. [2021-05-21 21:16:45,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953614 states, 953613 states have (on average 3.6471136614119146) internal successors, (3477935), 953613 states have internal predecessors, (3477935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953614 states to 953614 states and 3477935 transitions. [2021-05-21 21:16:51,978 INFO L78 Accepts]: Start accepts. Automaton has 953614 states and 3477935 transitions. Word has length 25 [2021-05-21 21:16:51,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:51,978 INFO L482 AbstractCegarLoop]: Abstraction has 953614 states and 3477935 transitions. [2021-05-21 21:16:51,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:51,978 INFO L276 IsEmpty]: Start isEmpty. Operand 953614 states and 3477935 transitions. [2021-05-21 21:16:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:16:53,017 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:53,017 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:53,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-05-21 21:16:53,233 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:53,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:53,233 INFO L82 PathProgramCache]: Analyzing trace with hash -770337771, now seen corresponding path program 114 times [2021-05-21 21:16:53,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:53,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402899632] [2021-05-21 21:16:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:53,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:53,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402899632] [2021-05-21 21:16:53,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402899632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:53,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978468569] [2021-05-21 21:16:53,262 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 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 [2021-05-21 21:16:53,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:16:53,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:53,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:16:53,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:53,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978468569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:53,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:53,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-05-21 21:16:53,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561287243] [2021-05-21 21:16:53,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:16:53,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:53,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:16:53,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:16:53,357 INFO L87 Difference]: Start difference. First operand 953614 states and 3477935 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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) [2021-05-21 21:17:05,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:05,611 INFO L93 Difference]: Finished difference Result 1237043 states and 4536064 transitions. [2021-05-21 21:17:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:17:05,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 25 [2021-05-21 21:17:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:13,100 INFO L225 Difference]: With dead ends: 1237043 [2021-05-21 21:17:13,100 INFO L226 Difference]: Without dead ends: 1237025 [2021-05-21 21:17:13,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:17:14,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237025 states. [2021-05-21 21:17:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237025 to 67378. [2021-05-21 21:17:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67378 states, 67377 states have (on average 3.6460067975718715) internal successors, (245657), 67377 states have internal predecessors, (245657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67378 states to 67378 states and 245657 transitions. [2021-05-21 21:17:28,200 INFO L78 Accepts]: Start accepts. Automaton has 67378 states and 245657 transitions. Word has length 25 [2021-05-21 21:17:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:28,200 INFO L482 AbstractCegarLoop]: Abstraction has 67378 states and 245657 transitions. [2021-05-21 21:17:28,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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) [2021-05-21 21:17:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 67378 states and 245657 transitions. [2021-05-21 21:17:28,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:17:28,306 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:28,306 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:28,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:28,521 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:28,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:28,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2054072857, now seen corresponding path program 115 times [2021-05-21 21:17:28,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:28,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398229921] [2021-05-21 21:17:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:28,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:28,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398229921] [2021-05-21 21:17:28,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398229921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:28,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655971281] [2021-05-21 21:17:28,546 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 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 [2021-05-21 21:17:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:28,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:17:28,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:28,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655971281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:28,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:28,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-05-21 21:17:28,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209063515] [2021-05-21 21:17:28,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:17:28,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:28,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:17:28,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:17:28,623 INFO L87 Difference]: Start difference. First operand 67378 states and 245657 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:29,170 INFO L93 Difference]: Finished difference Result 92939 states and 336774 transitions. [2021-05-21 21:17:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:17:29,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:17:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:30,117 INFO L225 Difference]: With dead ends: 92939 [2021-05-21 21:17:30,118 INFO L226 Difference]: Without dead ends: 92921 [2021-05-21 21:17:30,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:17:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92921 states. [2021-05-21 21:17:31,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92921 to 71760. [2021-05-21 21:17:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71760 states, 71759 states have (on average 3.645953817639599) internal successors, (261630), 71759 states have internal predecessors, (261630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71760 states to 71760 states and 261630 transitions. [2021-05-21 21:17:32,059 INFO L78 Accepts]: Start accepts. Automaton has 71760 states and 261630 transitions. Word has length 25 [2021-05-21 21:17:32,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:32,059 INFO L482 AbstractCegarLoop]: Abstraction has 71760 states and 261630 transitions. [2021-05-21 21:17:32,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:32,060 INFO L276 IsEmpty]: Start isEmpty. Operand 71760 states and 261630 transitions. [2021-05-21 21:17:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:17:32,170 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:32,170 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:32,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-05-21 21:17:32,385 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:32,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:32,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1939551343, now seen corresponding path program 116 times [2021-05-21 21:17:32,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:32,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247618936] [2021-05-21 21:17:32,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:32,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:32,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247618936] [2021-05-21 21:17:32,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247618936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:32,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744949979] [2021-05-21 21:17:32,471 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 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 [2021-05-21 21:17:32,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:17:32,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:32,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:17:32,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:32,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744949979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:32,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:32,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-21 21:17:32,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573834307] [2021-05-21 21:17:32,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:17:32,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:32,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:17:32,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:17:32,587 INFO L87 Difference]: Start difference. First operand 71760 states and 261630 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:33,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:33,107 INFO L93 Difference]: Finished difference Result 74903 states and 271929 transitions. [2021-05-21 21:17:33,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:17:33,107 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:17:33,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:33,765 INFO L225 Difference]: With dead ends: 74903 [2021-05-21 21:17:33,765 INFO L226 Difference]: Without dead ends: 74878 [2021-05-21 21:17:33,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:17:33,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74878 states. [2021-05-21 21:17:35,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74878 to 72531. [2021-05-21 21:17:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72531 states, 72530 states have (on average 3.644298910795533) internal successors, (264321), 72530 states have internal predecessors, (264321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72531 states to 72531 states and 264321 transitions. [2021-05-21 21:17:35,504 INFO L78 Accepts]: Start accepts. Automaton has 72531 states and 264321 transitions. Word has length 25 [2021-05-21 21:17:35,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:35,504 INFO L482 AbstractCegarLoop]: Abstraction has 72531 states and 264321 transitions. [2021-05-21 21:17:35,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:35,504 INFO L276 IsEmpty]: Start isEmpty. Operand 72531 states and 264321 transitions. [2021-05-21 21:17:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:17:35,617 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:35,617 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:35,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-05-21 21:17:35,833 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:35,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1757938849, now seen corresponding path program 117 times [2021-05-21 21:17:35,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:35,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91842888] [2021-05-21 21:17:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:35,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:35,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91842888] [2021-05-21 21:17:35,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91842888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:35,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984346119] [2021-05-21 21:17:35,929 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:17:35,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:17:35,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:35,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 21:17:35,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:36,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984346119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:36,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:36,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-21 21:17:36,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723980270] [2021-05-21 21:17:36,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:17:36,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:36,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:17:36,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:17:36,024 INFO L87 Difference]: Start difference. First operand 72531 states and 264321 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:36,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:36,546 INFO L93 Difference]: Finished difference Result 74478 states and 270694 transitions. [2021-05-21 21:17:36,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:17:36,546 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:17:36,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:36,746 INFO L225 Difference]: With dead ends: 74478 [2021-05-21 21:17:36,747 INFO L226 Difference]: Without dead ends: 74412 [2021-05-21 21:17:36,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:17:37,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74412 states. [2021-05-21 21:17:38,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74412 to 73968. [2021-05-21 21:17:38,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73968 states, 73967 states have (on average 3.6399205050901076) internal successors, (269234), 73967 states have internal predecessors, (269234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73968 states to 73968 states and 269234 transitions. [2021-05-21 21:17:38,709 INFO L78 Accepts]: Start accepts. Automaton has 73968 states and 269234 transitions. Word has length 25 [2021-05-21 21:17:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:38,709 INFO L482 AbstractCegarLoop]: Abstraction has 73968 states and 269234 transitions. [2021-05-21 21:17:38,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:38,709 INFO L276 IsEmpty]: Start isEmpty. Operand 73968 states and 269234 transitions. [2021-05-21 21:17:38,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:17:38,815 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:38,815 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:39,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-05-21 21:17:39,015 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:39,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:39,015 INFO L82 PathProgramCache]: Analyzing trace with hash -459359395, now seen corresponding path program 118 times [2021-05-21 21:17:39,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:39,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139439775] [2021-05-21 21:17:39,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:39,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:39,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139439775] [2021-05-21 21:17:39,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139439775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:39,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20968239] [2021-05-21 21:17:39,038 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 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 [2021-05-21 21:17:39,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:17:39,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:39,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:17:39,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:39,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20968239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:39,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:39,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-05-21 21:17:39,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381410493] [2021-05-21 21:17:39,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:17:39,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:39,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:17:39,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:17:39,110 INFO L87 Difference]: Start difference. First operand 73968 states and 269234 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:39,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:39,782 INFO L93 Difference]: Finished difference Result 121864 states and 442873 transitions. [2021-05-21 21:17:39,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:17:39,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:17:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:40,451 INFO L225 Difference]: With dead ends: 121864 [2021-05-21 21:17:40,451 INFO L226 Difference]: Without dead ends: 121846 [2021-05-21 21:17:40,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:17:40,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121846 states. [2021-05-21 21:17:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121846 to 85308. [2021-05-21 21:17:42,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85308 states, 85307 states have (on average 3.6461720609094215) internal successors, (311044), 85307 states have internal predecessors, (311044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85308 states to 85308 states and 311044 transitions. [2021-05-21 21:17:42,496 INFO L78 Accepts]: Start accepts. Automaton has 85308 states and 311044 transitions. Word has length 25 [2021-05-21 21:17:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:42,496 INFO L482 AbstractCegarLoop]: Abstraction has 85308 states and 311044 transitions. [2021-05-21 21:17:42,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:42,496 INFO L276 IsEmpty]: Start isEmpty. Operand 85308 states and 311044 transitions. [2021-05-21 21:17:42,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:17:42,610 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:42,610 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:42,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:42,810 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:42,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:42,810 INFO L82 PathProgramCache]: Analyzing trace with hash 739863065, now seen corresponding path program 22 times [2021-05-21 21:17:42,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:42,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620088415] [2021-05-21 21:17:42,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:43,130 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-05-21 21:17:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:43,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:43,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620088415] [2021-05-21 21:17:43,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620088415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:43,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079249657] [2021-05-21 21:17:43,164 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 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 [2021-05-21 21:17:43,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:17:43,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:43,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:17:43,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:43,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079249657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:43,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:43,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-21 21:17:43,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630511459] [2021-05-21 21:17:43,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:17:43,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:43,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:17:43,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:17:43,272 INFO L87 Difference]: Start difference. First operand 85308 states and 311044 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-05-21 21:17:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:43,931 INFO L93 Difference]: Finished difference Result 102571 states and 372087 transitions. [2021-05-21 21:17:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 21:17:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:17:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:44,206 INFO L225 Difference]: With dead ends: 102571 [2021-05-21 21:17:44,206 INFO L226 Difference]: Without dead ends: 102541 [2021-05-21 21:17:44,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 439.6ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:17:44,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102541 states. [2021-05-21 21:17:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102541 to 85260. [2021-05-21 21:17:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85260 states, 85259 states have (on average 3.643920289940065) internal successors, (310677), 85259 states have internal predecessors, (310677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85260 states to 85260 states and 310677 transitions. [2021-05-21 21:17:46,472 INFO L78 Accepts]: Start accepts. Automaton has 85260 states and 310677 transitions. Word has length 25 [2021-05-21 21:17:46,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:46,472 INFO L482 AbstractCegarLoop]: Abstraction has 85260 states and 310677 transitions. [2021-05-21 21:17:46,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-05-21 21:17:46,472 INFO L276 IsEmpty]: Start isEmpty. Operand 85260 states and 310677 transitions. [2021-05-21 21:17:46,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:17:46,595 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:46,595 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:46,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:46,795 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:46,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:46,795 INFO L82 PathProgramCache]: Analyzing trace with hash -575234847, now seen corresponding path program 23 times [2021-05-21 21:17:46,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:46,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742903267] [2021-05-21 21:17:46,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:46,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:46,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742903267] [2021-05-21 21:17:46,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742903267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:46,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269862999] [2021-05-21 21:17:46,829 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 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 [2021-05-21 21:17:46,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:17:46,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:46,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:17:46,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:46,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269862999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:46,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:46,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-05-21 21:17:46,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277916930] [2021-05-21 21:17:46,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:17:46,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:46,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:17:46,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:17:46,899 INFO L87 Difference]: Start difference. First operand 85260 states and 310677 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:48,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:48,128 INFO L93 Difference]: Finished difference Result 165869 states and 605636 transitions. [2021-05-21 21:17:48,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:17:48,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:17:48,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:48,579 INFO L225 Difference]: With dead ends: 165869 [2021-05-21 21:17:48,579 INFO L226 Difference]: Without dead ends: 165869 [2021-05-21 21:17:48,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:17:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165869 states. [2021-05-21 21:17:51,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165869 to 156404. [2021-05-21 21:17:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156404 states, 156403 states have (on average 3.6371616912719067) internal successors, (568863), 156403 states have internal predecessors, (568863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156404 states to 156404 states and 568863 transitions. [2021-05-21 21:17:52,285 INFO L78 Accepts]: Start accepts. Automaton has 156404 states and 568863 transitions. Word has length 25 [2021-05-21 21:17:52,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:52,285 INFO L482 AbstractCegarLoop]: Abstraction has 156404 states and 568863 transitions. [2021-05-21 21:17:52,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:52,285 INFO L276 IsEmpty]: Start isEmpty. Operand 156404 states and 568863 transitions. [2021-05-21 21:17:52,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:17:52,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:52,845 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:53,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:53,045 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:53,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:53,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1360281583, now seen corresponding path program 24 times [2021-05-21 21:17:53,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:53,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929490585] [2021-05-21 21:17:53,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:17:53,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:53,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929490585] [2021-05-21 21:17:53,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929490585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:53,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038797659] [2021-05-21 21:17:53,062 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 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 [2021-05-21 21:17:53,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:17:53,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:53,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:17:53,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:17:53,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038797659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:53,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:53,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-21 21:17:53,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575405434] [2021-05-21 21:17:53,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:17:53,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:53,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:17:53,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:17:53,133 INFO L87 Difference]: Start difference. First operand 156404 states and 568863 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) [2021-05-21 21:17:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:54,070 INFO L93 Difference]: Finished difference Result 157728 states and 572932 transitions. [2021-05-21 21:17:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:17:54,071 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 25 [2021-05-21 21:17:54,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:54,538 INFO L225 Difference]: With dead ends: 157728 [2021-05-21 21:17:54,539 INFO L226 Difference]: Without dead ends: 157671 [2021-05-21 21:17:54,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:17:54,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157671 states. [2021-05-21 21:17:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157671 to 156390. [2021-05-21 21:17:57,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156390 states, 156389 states have (on average 3.636611270613662) internal successors, (568726), 156389 states have internal predecessors, (568726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:58,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156390 states to 156390 states and 568726 transitions. [2021-05-21 21:17:58,370 INFO L78 Accepts]: Start accepts. Automaton has 156390 states and 568726 transitions. Word has length 25 [2021-05-21 21:17:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:58,370 INFO L482 AbstractCegarLoop]: Abstraction has 156390 states and 568726 transitions. [2021-05-21 21:17:58,370 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) [2021-05-21 21:17:58,370 INFO L276 IsEmpty]: Start isEmpty. Operand 156390 states and 568726 transitions. [2021-05-21 21:17:58,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:17:58,571 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:58,571 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:58,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:58,772 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:58,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:58,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1843619857, now seen corresponding path program 25 times [2021-05-21 21:17:58,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:58,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875679776] [2021-05-21 21:17:58,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:58,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:58,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875679776] [2021-05-21 21:17:58,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875679776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:58,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7206245] [2021-05-21 21:17:58,793 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 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 [2021-05-21 21:17:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:58,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:17:58,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:58,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7206245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:58,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:58,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-05-21 21:17:58,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449425704] [2021-05-21 21:17:58,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:17:58,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:58,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:17:58,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:17:58,871 INFO L87 Difference]: Start difference. First operand 156390 states and 568726 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:00,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:00,267 INFO L93 Difference]: Finished difference Result 160175 states and 580620 transitions. [2021-05-21 21:18:00,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:18:00,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:18:00,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:00,711 INFO L225 Difference]: With dead ends: 160175 [2021-05-21 21:18:00,711 INFO L226 Difference]: Without dead ends: 160037 [2021-05-21 21:18:00,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:18:00,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160037 states. [2021-05-21 21:18:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160037 to 156438. [2021-05-21 21:18:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156438 states, 156437 states have (on average 3.6320435702551186) internal successors, (568186), 156437 states have internal predecessors, (568186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:04,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156438 states to 156438 states and 568186 transitions. [2021-05-21 21:18:04,555 INFO L78 Accepts]: Start accepts. Automaton has 156438 states and 568186 transitions. Word has length 25 [2021-05-21 21:18:04,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:04,555 INFO L482 AbstractCegarLoop]: Abstraction has 156438 states and 568186 transitions. [2021-05-21 21:18:04,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:04,555 INFO L276 IsEmpty]: Start isEmpty. Operand 156438 states and 568186 transitions. [2021-05-21 21:18:04,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:18:04,757 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:04,757 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:04,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-05-21 21:18:04,957 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:04,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:04,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1248675155, now seen corresponding path program 32 times [2021-05-21 21:18:04,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:04,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004033860] [2021-05-21 21:18:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:04,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:04,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004033860] [2021-05-21 21:18:04,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004033860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:04,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232590018] [2021-05-21 21:18:04,986 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 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 [2021-05-21 21:18:05,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:18:05,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:05,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:18:05,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:05,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232590018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:05,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:05,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-21 21:18:05,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527665303] [2021-05-21 21:18:05,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:18:05,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:05,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:18:05,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:18:05,044 INFO L87 Difference]: Start difference. First operand 156438 states and 568186 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) [2021-05-21 21:18:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:06,838 INFO L93 Difference]: Finished difference Result 255389 states and 932819 transitions. [2021-05-21 21:18:06,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:18:06,838 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 25 [2021-05-21 21:18:06,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:07,622 INFO L225 Difference]: With dead ends: 255389 [2021-05-21 21:18:07,622 INFO L226 Difference]: Without dead ends: 255389 [2021-05-21 21:18:07,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:18:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255389 states. [2021-05-21 21:18:12,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255389 to 251043. [2021-05-21 21:18:12,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251043 states, 251042 states have (on average 3.6572525712828927) internal successors, (918124), 251042 states have internal predecessors, (918124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251043 states to 251043 states and 918124 transitions. [2021-05-21 21:18:14,035 INFO L78 Accepts]: Start accepts. Automaton has 251043 states and 918124 transitions. Word has length 25 [2021-05-21 21:18:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:14,035 INFO L482 AbstractCegarLoop]: Abstraction has 251043 states and 918124 transitions. [2021-05-21 21:18:14,035 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) [2021-05-21 21:18:14,035 INFO L276 IsEmpty]: Start isEmpty. Operand 251043 states and 918124 transitions. [2021-05-21 21:18:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:18:14,281 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:14,281 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:14,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-05-21 21:18:14,481 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:14,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:14,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1912899399, now seen corresponding path program 33 times [2021-05-21 21:18:14,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:14,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617918355] [2021-05-21 21:18:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:14,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:14,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617918355] [2021-05-21 21:18:14,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617918355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:14,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080448826] [2021-05-21 21:18:14,514 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 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 [2021-05-21 21:18:14,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:18:14,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:14,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:18:14,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:14,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080448826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:14,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:14,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-21 21:18:14,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943036923] [2021-05-21 21:18:14,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:18:14,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:14,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:18:14,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:18:14,568 INFO L87 Difference]: Start difference. First operand 251043 states and 918124 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-05-21 21:18:16,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:16,507 INFO L93 Difference]: Finished difference Result 281388 states and 1026402 transitions. [2021-05-21 21:18:16,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:18:16,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 25 [2021-05-21 21:18:16,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:17,795 INFO L225 Difference]: With dead ends: 281388 [2021-05-21 21:18:17,795 INFO L226 Difference]: Without dead ends: 281388 [2021-05-21 21:18:17,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:18:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281388 states. [2021-05-21 21:18:22,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281388 to 250518. [2021-05-21 21:18:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250518 states, 250517 states have (on average 3.6576000830282975) internal successors, (916291), 250517 states have internal predecessors, (916291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:23,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250518 states to 250518 states and 916291 transitions. [2021-05-21 21:18:23,773 INFO L78 Accepts]: Start accepts. Automaton has 250518 states and 916291 transitions. Word has length 25 [2021-05-21 21:18:23,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:23,773 INFO L482 AbstractCegarLoop]: Abstraction has 250518 states and 916291 transitions. [2021-05-21 21:18:23,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-05-21 21:18:23,773 INFO L276 IsEmpty]: Start isEmpty. Operand 250518 states and 916291 transitions. [2021-05-21 21:18:24,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:18:24,004 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:24,004 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:24,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-05-21 21:18:24,205 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:24,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:24,205 INFO L82 PathProgramCache]: Analyzing trace with hash 641686671, now seen corresponding path program 34 times [2021-05-21 21:18:24,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:24,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746458115] [2021-05-21 21:18:24,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:24,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:24,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746458115] [2021-05-21 21:18:24,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746458115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:24,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642712604] [2021-05-21 21:18:24,231 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:24,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:18:24,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:24,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:18:24,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:24,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642712604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:24,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:24,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-21 21:18:24,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671341773] [2021-05-21 21:18:24,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:18:24,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:24,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:18:24,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:18:24,287 INFO L87 Difference]: Start difference. First operand 250518 states and 916291 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) Received shutdown request... [2021-05-21 21:18:25,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:18:25,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-05-21 21:18:25,773 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 21:18:25,775 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 21:18:25,776 WARN L196 ceAbstractionStarter]: Timeout [2021-05-21 21:18:25,777 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 09:18:25 BasicIcfg [2021-05-21 21:18:25,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 21:18:25,777 INFO L168 Benchmark]: Toolchain (without parser) took 638332.06 ms. Allocated memory was 364.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 344.5 MB in the beginning and 10.5 GB in the end (delta: -10.1 GB). Peak memory consumption was 5.9 GB. Max. memory is 16.0 GB. [2021-05-21 21:18:25,777 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 364.9 MB. Free memory was 345.6 MB in the beginning and 345.5 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:18:25,777 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.15 ms. Allocated memory is still 364.9 MB. Free memory was 344.3 MB in the beginning and 342.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:18:25,777 INFO L168 Benchmark]: Boogie Preprocessor took 12.78 ms. Allocated memory is still 364.9 MB. Free memory was 342.9 MB in the beginning and 342.0 MB in the end (delta: 986.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:18:25,777 INFO L168 Benchmark]: RCFGBuilder took 225.33 ms. Allocated memory is still 364.9 MB. Free memory was 342.0 MB in the beginning and 329.9 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-21 21:18:25,777 INFO L168 Benchmark]: TraceAbstraction took 638073.30 ms. Allocated memory was 364.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 329.5 MB in the beginning and 10.5 GB in the end (delta: -10.1 GB). Peak memory consumption was 5.9 GB. Max. memory is 16.0 GB. [2021-05-21 21:18:25,778 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 364.9 MB. Free memory was 345.6 MB in the beginning and 345.5 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.15 ms. Allocated memory is still 364.9 MB. Free memory was 344.3 MB in the beginning and 342.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.78 ms. Allocated memory is still 364.9 MB. Free memory was 342.9 MB in the beginning and 342.0 MB in the end (delta: 986.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 225.33 ms. Allocated memory is still 364.9 MB. Free memory was 342.0 MB in the beginning and 329.9 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 638073.30 ms. Allocated memory was 364.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 329.5 MB in the beginning and 10.5 GB in the end (delta: -10.1 GB). Peak memory consumption was 5.9 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (250518states) and FLOYD_HOARE automaton (currently 17 states, 10 states before enhancement),while ReachableStatesComputation was computing reachable states (137162 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 638000.6ms, OverallIterations: 183, TraceHistogramMax: 3, EmptinessCheckTime: 19010.0ms, AutomataDifference: 200853.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 44.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6977 SDtfs, 19844 SDslu, 33472 SDs, 0 SdLazy, 43295 SolverSat, 6707 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17888.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6459 GetRequests, 3345 SyntacticMatches, 323 SemanticMatches, 2791 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15052 ImplicationChecksByTransitivity, 30368.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=953614occurred in iteration=171, InterpolantAutomatonStates: 2720, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 348365.7ms AutomataMinimizationTime, 182 MinimizatonAttempts, 2613964 StatesRemovedByMinimization, 182 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 476.9ms SsaConstructionTime, 1543.8ms SatisfiabilityAnalysisTime, 26516.9ms InterpolantComputationTime, 8499 NumberOfCodeBlocks, 8492 NumberOfCodeBlocksAsserted, 604 NumberOfCheckSat, 8138 ConstructedInterpolants, 0 QuantifiedInterpolants, 58598 SizeOfPredicates, 279 NumberOfNonLiveVariables, 10942 ConjunctsInSsa, 2363 ConjunctsInUnsatCore, 361 InterpolantComputations, 7 PerfectInterpolantSequences, 397/2956 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