/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/parallel/misc-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:04:36,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:04:36,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:04:36,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:04:36,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 05:04:36,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 05:04:36,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 05:04:36,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 05:04:36,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 05:04:36,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 05:04:36,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 05:04:36,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 05:04:36,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 05:04:36,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 05:04:36,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 05:04:36,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 05:04:36,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 05:04:36,766 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 [2021-06-05 05:04:36,801 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:04:36,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:04:36,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:04:36,802 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:04:36,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:04:36,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:04:36,805 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:04:36,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:04:36,805 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:04:36,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:04:36,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:04:36,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:04:36,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:04:36,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:04:36,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:04:36,807 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:04:36,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:04:36,807 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:04:36,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:04:36,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:04:36,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:04:36,807 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:04:36,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:04:36,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:04:36,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:04:36,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:04:36,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:04:36,808 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:04:36,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:04:36,808 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:04:36,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:04:36,809 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:04:37,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:04:37,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:04:37,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:04:37,121 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:04:37,123 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:04:37,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl [2021-06-05 05:04:37,124 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl' [2021-06-05 05:04:37,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:04:37,153 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:04:37,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:04:37,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:04:37,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:04:37,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:37" (1/1) ... [2021-06-05 05:04:37,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:37" (1/1) ... [2021-06-05 05:04:37,176 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:04:37,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:04:37,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:04:37,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:04:37,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:37" (1/1) ... [2021-06-05 05:04:37,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:37" (1/1) ... [2021-06-05 05:04:37,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:37" (1/1) ... [2021-06-05 05:04:37,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:37" (1/1) ... [2021-06-05 05:04:37,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:37" (1/1) ... [2021-06-05 05:04:37,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:37" (1/1) ... [2021-06-05 05:04:37,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:37" (1/1) ... [2021-06-05 05:04:37,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:04:37,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:04:37,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:04:37,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:04:37,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:04:37,277 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:04:37,278 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:04:37,278 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:04:37,278 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:04:37,279 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:04:37,279 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:04:37,279 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:04:37,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:04:37,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:04:37,280 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 05:04:37,457 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:04:37,457 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:04:37,458 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:04:37 BoogieIcfgContainer [2021-06-05 05:04:37,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:04:37,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:04:37,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:04:37,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:04:37,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:37" (1/2) ... [2021-06-05 05:04:37,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79bf7800 and model type misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:04:37, skipping insertion in model container [2021-06-05 05:04:37,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:04:37" (2/2) ... [2021-06-05 05:04:37,465 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-2.wvr.bpl [2021-06-05 05:04:37,470 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:04:37,470 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:04:37,470 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:04:37,471 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:04:37,501 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 05:04:37,522 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 05:04:37,558 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:04:37,558 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:04:37,558 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:04:37,558 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:04:37,558 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:04:37,558 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:04:37,558 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:04:37,559 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:04:37,566 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 29 transitions, 74 flow [2021-06-05 05:04:37,595 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 87 states, 85 states have (on average 2.176470588235294) internal successors, (185), 86 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 85 states have (on average 2.176470588235294) internal successors, (185), 86 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:37,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 05:04:37,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:37,621 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:37,621 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:37,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:37,626 INFO L82 PathProgramCache]: Analyzing trace with hash -523912972, now seen corresponding path program 1 times [2021-06-05 05:04:37,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:37,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103789259] [2021-06-05 05:04:37,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:37,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:37,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103789259] [2021-06-05 05:04:37,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103789259] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:04:37,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:04:37,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:04:37,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836871496] [2021-06-05 05:04:37,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:04:37,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:37,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:04:37,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:04:37,763 INFO L87 Difference]: Start difference. First operand has 87 states, 85 states have (on average 2.176470588235294) internal successors, (185), 86 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:37,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:37,813 INFO L93 Difference]: Finished difference Result 134 states and 294 transitions. [2021-06-05 05:04:37,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:04:37,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 05:04:37,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:37,830 INFO L225 Difference]: With dead ends: 134 [2021-06-05 05:04:37,830 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 05:04:37,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:04:37,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 05:04:37,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2021-06-05 05:04:37,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.161290322580645) internal successors, (201), 93 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 201 transitions. [2021-06-05 05:04:37,885 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 201 transitions. Word has length 11 [2021-06-05 05:04:37,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:37,885 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 201 transitions. [2021-06-05 05:04:37,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 201 transitions. [2021-06-05 05:04:37,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 05:04:37,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:37,888 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:37,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:04:37,889 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:37,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:37,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1655401882, now seen corresponding path program 1 times [2021-06-05 05:04:37,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:37,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312390426] [2021-06-05 05:04:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:37,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:37,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312390426] [2021-06-05 05:04:37,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312390426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:37,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230057655] [2021-06-05 05:04:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:38,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:04:38,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:38,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230057655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:38,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:38,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 05:04:38,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061784406] [2021-06-05 05:04:38,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:04:38,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:38,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:04:38,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:04:38,131 INFO L87 Difference]: Start difference. First operand 94 states and 201 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:38,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:38,193 INFO L93 Difference]: Finished difference Result 169 states and 356 transitions. [2021-06-05 05:04:38,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:04:38,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 05:04:38,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:38,197 INFO L225 Difference]: With dead ends: 169 [2021-06-05 05:04:38,197 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 05:04:38,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:04:38,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 05:04:38,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-06-05 05:04:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.185567010309278) internal successors, (212), 97 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2021-06-05 05:04:38,218 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 16 [2021-06-05 05:04:38,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:38,219 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2021-06-05 05:04:38,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2021-06-05 05:04:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 05:04:38,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:38,225 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:38,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 05:04:38,437 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:38,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:38,438 INFO L82 PathProgramCache]: Analyzing trace with hash -965799907, now seen corresponding path program 1 times [2021-06-05 05:04:38,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:38,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332351443] [2021-06-05 05:04:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:38,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:38,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332351443] [2021-06-05 05:04:38,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332351443] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:04:38,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:04:38,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:04:38,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696165654] [2021-06-05 05:04:38,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:04:38,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:38,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:04:38,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:04:38,479 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:38,535 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2021-06-05 05:04:38,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:04:38,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 05:04:38,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:38,537 INFO L225 Difference]: With dead ends: 188 [2021-06-05 05:04:38,542 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 05:04:38,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:04:38,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 05:04:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 122. [2021-06-05 05:04:38,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1735537190082646) internal successors, (263), 121 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:38,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 263 transitions. [2021-06-05 05:04:38,559 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 263 transitions. Word has length 16 [2021-06-05 05:04:38,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:38,559 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 263 transitions. [2021-06-05 05:04:38,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:38,560 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 263 transitions. [2021-06-05 05:04:38,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 05:04:38,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:38,561 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:38,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 05:04:38,561 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:38,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:38,562 INFO L82 PathProgramCache]: Analyzing trace with hash 798457899, now seen corresponding path program 2 times [2021-06-05 05:04:38,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:38,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21473888] [2021-06-05 05:04:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:38,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:38,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21473888] [2021-06-05 05:04:38,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21473888] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:04:38,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:04:38,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:04:38,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019510319] [2021-06-05 05:04:38,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:04:38,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:38,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:04:38,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:04:38,611 INFO L87 Difference]: Start difference. First operand 122 states and 263 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:38,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:38,646 INFO L93 Difference]: Finished difference Result 156 states and 342 transitions. [2021-06-05 05:04:38,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:04:38,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 05:04:38,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:38,648 INFO L225 Difference]: With dead ends: 156 [2021-06-05 05:04:38,648 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 05:04:38,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:04:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 05:04:38,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 104. [2021-06-05 05:04:38,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.174757281553398) internal successors, (224), 103 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:38,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2021-06-05 05:04:38,653 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 16 [2021-06-05 05:04:38,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:38,653 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2021-06-05 05:04:38,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:38,653 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2021-06-05 05:04:38,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 05:04:38,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:38,654 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:38,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:04:38,654 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:38,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:38,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1004932738, now seen corresponding path program 2 times [2021-06-05 05:04:38,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:38,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275212371] [2021-06-05 05:04:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:38,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:38,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275212371] [2021-06-05 05:04:38,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275212371] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:04:38,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:04:38,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:04:38,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474497199] [2021-06-05 05:04:38,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:04:38,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:38,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:04:38,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:04:38,701 INFO L87 Difference]: Start difference. First operand 104 states and 224 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:38,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:38,739 INFO L93 Difference]: Finished difference Result 156 states and 340 transitions. [2021-06-05 05:04:38,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:04:38,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 05:04:38,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:38,740 INFO L225 Difference]: With dead ends: 156 [2021-06-05 05:04:38,740 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 05:04:38,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:04:38,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 05:04:38,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 104. [2021-06-05 05:04:38,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 223 transitions. [2021-06-05 05:04:38,744 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 223 transitions. Word has length 16 [2021-06-05 05:04:38,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:38,744 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 223 transitions. [2021-06-05 05:04:38,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:38,744 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 223 transitions. [2021-06-05 05:04:38,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:04:38,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:38,745 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:38,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 05:04:38,745 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:38,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:38,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1060614677, now seen corresponding path program 1 times [2021-06-05 05:04:38,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:38,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414385700] [2021-06-05 05:04:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:38,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:38,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414385700] [2021-06-05 05:04:38,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414385700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:38,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360820190] [2021-06-05 05:04:38,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:38,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:04:38,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:39,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360820190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:39,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:39,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 05:04:39,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24437645] [2021-06-05 05:04:39,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:04:39,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:39,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:04:39,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:04:39,025 INFO L87 Difference]: Start difference. First operand 104 states and 223 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:39,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:39,154 INFO L93 Difference]: Finished difference Result 226 states and 505 transitions. [2021-06-05 05:04:39,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:04:39,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:04:39,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:39,155 INFO L225 Difference]: With dead ends: 226 [2021-06-05 05:04:39,156 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 05:04:39,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:04:39,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 05:04:39,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 164. [2021-06-05 05:04:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.2024539877300615) internal successors, (359), 163 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 359 transitions. [2021-06-05 05:04:39,161 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 359 transitions. Word has length 21 [2021-06-05 05:04:39,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:39,161 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 359 transitions. [2021-06-05 05:04:39,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 359 transitions. [2021-06-05 05:04:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:04:39,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:39,162 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:39,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:39,385 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:39,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:39,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1348728101, now seen corresponding path program 2 times [2021-06-05 05:04:39,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:39,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626262853] [2021-06-05 05:04:39,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:39,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:39,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626262853] [2021-06-05 05:04:39,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626262853] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:04:39,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:04:39,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:04:39,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150737908] [2021-06-05 05:04:39,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:04:39,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:39,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:04:39,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:04:39,424 INFO L87 Difference]: Start difference. First operand 164 states and 359 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:39,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:39,433 INFO L93 Difference]: Finished difference Result 266 states and 560 transitions. [2021-06-05 05:04:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:04:39,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:04:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:39,435 INFO L225 Difference]: With dead ends: 266 [2021-06-05 05:04:39,435 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 05:04:39,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:04:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 05:04:39,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2021-06-05 05:04:39,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.171673819742489) internal successors, (506), 233 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 506 transitions. [2021-06-05 05:04:39,441 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 506 transitions. Word has length 26 [2021-06-05 05:04:39,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:39,441 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 506 transitions. [2021-06-05 05:04:39,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:39,442 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 506 transitions. [2021-06-05 05:04:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:04:39,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:39,442 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:39,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 05:04:39,443 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:39,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:39,443 INFO L82 PathProgramCache]: Analyzing trace with hash -505952581, now seen corresponding path program 1 times [2021-06-05 05:04:39,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:39,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582434109] [2021-06-05 05:04:39,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:39,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:39,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582434109] [2021-06-05 05:04:39,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582434109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:39,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949589952] [2021-06-05 05:04:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:39,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:04:39,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:39,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949589952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:39,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:39,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:04:39,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187955418] [2021-06-05 05:04:39,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:39,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:39,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:39,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:39,585 INFO L87 Difference]: Start difference. First operand 234 states and 506 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:39,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:39,644 INFO L93 Difference]: Finished difference Result 562 states and 1200 transitions. [2021-06-05 05:04:39,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:04:39,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:04:39,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:39,647 INFO L225 Difference]: With dead ends: 562 [2021-06-05 05:04:39,647 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 05:04:39,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:04:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 05:04:39,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 438. [2021-06-05 05:04:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.265446224256293) internal successors, (990), 437 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 990 transitions. [2021-06-05 05:04:39,659 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 990 transitions. Word has length 26 [2021-06-05 05:04:39,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:39,659 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 990 transitions. [2021-06-05 05:04:39,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 990 transitions. [2021-06-05 05:04:39,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:04:39,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:39,660 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:39,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:39,884 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:39,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:39,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1335579773, now seen corresponding path program 2 times [2021-06-05 05:04:39,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:39,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990021082] [2021-06-05 05:04:39,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:39,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:39,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990021082] [2021-06-05 05:04:39,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990021082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:39,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709786713] [2021-06-05 05:04:39,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:39,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:39,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:39,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:04:39,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:40,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709786713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:40,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:40,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 05:04:40,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967764372] [2021-06-05 05:04:40,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:04:40,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:40,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:04:40,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:04:40,043 INFO L87 Difference]: Start difference. First operand 438 states and 990 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:40,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:40,098 INFO L93 Difference]: Finished difference Result 491 states and 1077 transitions. [2021-06-05 05:04:40,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:04:40,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:04:40,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:40,106 INFO L225 Difference]: With dead ends: 491 [2021-06-05 05:04:40,106 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 05:04:40,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:40,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 05:04:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 440. [2021-06-05 05:04:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.2574031890660593) internal successors, (991), 439 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 991 transitions. [2021-06-05 05:04:40,133 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 991 transitions. Word has length 26 [2021-06-05 05:04:40,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:40,134 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 991 transitions. [2021-06-05 05:04:40,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 991 transitions. [2021-06-05 05:04:40,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:04:40,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:40,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:40,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:40,341 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:40,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1641841895, now seen corresponding path program 3 times [2021-06-05 05:04:40,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:40,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199962882] [2021-06-05 05:04:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:40,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:40,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199962882] [2021-06-05 05:04:40,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199962882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:40,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901267865] [2021-06-05 05:04:40,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:40,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:04:40,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:40,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:04:40,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:40,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901267865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:40,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:40,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 05:04:40,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895821890] [2021-06-05 05:04:40,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:04:40,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:40,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:04:40,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:04:40,531 INFO L87 Difference]: Start difference. First operand 440 states and 991 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:40,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:40,593 INFO L93 Difference]: Finished difference Result 771 states and 1695 transitions. [2021-06-05 05:04:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:04:40,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:04:40,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:40,600 INFO L225 Difference]: With dead ends: 771 [2021-06-05 05:04:40,600 INFO L226 Difference]: Without dead ends: 771 [2021-06-05 05:04:40,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:40,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-06-05 05:04:40,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 634. [2021-06-05 05:04:40,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.3175355450236967) internal successors, (1467), 633 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:40,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1467 transitions. [2021-06-05 05:04:40,618 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1467 transitions. Word has length 26 [2021-06-05 05:04:40,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:40,619 INFO L482 AbstractCegarLoop]: Abstraction has 634 states and 1467 transitions. [2021-06-05 05:04:40,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:40,619 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1467 transitions. [2021-06-05 05:04:40,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:04:40,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:40,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:40,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:04:40,844 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:40,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:40,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1483069401, now seen corresponding path program 4 times [2021-06-05 05:04:40,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:40,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827913155] [2021-06-05 05:04:40,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:40,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:40,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827913155] [2021-06-05 05:04:40,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827913155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:40,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166196231] [2021-06-05 05:04:40,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:40,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:40,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:40,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:04:40,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:40,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166196231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:40,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:40,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 05:04:40,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998095101] [2021-06-05 05:04:40,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:04:40,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:40,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:04:40,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:04:40,949 INFO L87 Difference]: Start difference. First operand 634 states and 1467 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:40,997 INFO L93 Difference]: Finished difference Result 763 states and 1678 transitions. [2021-06-05 05:04:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:04:40,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:04:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:41,001 INFO L225 Difference]: With dead ends: 763 [2021-06-05 05:04:41,001 INFO L226 Difference]: Without dead ends: 759 [2021-06-05 05:04:41,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:41,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-06-05 05:04:41,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 634. [2021-06-05 05:04:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.3143759873617693) internal successors, (1465), 633 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1465 transitions. [2021-06-05 05:04:41,016 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1465 transitions. Word has length 26 [2021-06-05 05:04:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:41,016 INFO L482 AbstractCegarLoop]: Abstraction has 634 states and 1465 transitions. [2021-06-05 05:04:41,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1465 transitions. [2021-06-05 05:04:41,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:04:41,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:41,018 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:41,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:41,237 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:41,237 INFO L82 PathProgramCache]: Analyzing trace with hash 275158029, now seen corresponding path program 5 times [2021-06-05 05:04:41,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:41,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047416144] [2021-06-05 05:04:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:41,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:41,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047416144] [2021-06-05 05:04:41,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047416144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:41,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332603610] [2021-06-05 05:04:41,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:41,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:04:41,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:41,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:04:41,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:41,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332603610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:41,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:41,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:04:41,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825902615] [2021-06-05 05:04:41,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:41,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:41,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:41,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:41,382 INFO L87 Difference]: Start difference. First operand 634 states and 1465 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:41,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:41,464 INFO L93 Difference]: Finished difference Result 741 states and 1639 transitions. [2021-06-05 05:04:41,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:04:41,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:04:41,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:41,468 INFO L225 Difference]: With dead ends: 741 [2021-06-05 05:04:41,468 INFO L226 Difference]: Without dead ends: 721 [2021-06-05 05:04:41,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:04:41,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-05 05:04:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 654. [2021-06-05 05:04:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.2833078101071975) internal successors, (1491), 653 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:41,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1491 transitions. [2021-06-05 05:04:41,491 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1491 transitions. Word has length 26 [2021-06-05 05:04:41,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:41,491 INFO L482 AbstractCegarLoop]: Abstraction has 654 states and 1491 transitions. [2021-06-05 05:04:41,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:41,491 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1491 transitions. [2021-06-05 05:04:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:04:41,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:41,494 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:41,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:41,705 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:41,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:41,705 INFO L82 PathProgramCache]: Analyzing trace with hash 590448310, now seen corresponding path program 6 times [2021-06-05 05:04:41,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:41,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136249631] [2021-06-05 05:04:41,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:04:41,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:41,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136249631] [2021-06-05 05:04:41,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136249631] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:04:41,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:04:41,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:04:41,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72177366] [2021-06-05 05:04:41,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:04:41,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:41,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:04:41,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:04:41,730 INFO L87 Difference]: Start difference. First operand 654 states and 1491 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:41,744 INFO L93 Difference]: Finished difference Result 1106 states and 2391 transitions. [2021-06-05 05:04:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:04:41,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:04:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:41,748 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 05:04:41,748 INFO L226 Difference]: Without dead ends: 1106 [2021-06-05 05:04:41,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:04:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-05 05:04:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1035. [2021-06-05 05:04:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 2.2030947775628626) internal successors, (2278), 1034 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 2278 transitions. [2021-06-05 05:04:41,769 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 2278 transitions. Word has length 31 [2021-06-05 05:04:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:41,769 INFO L482 AbstractCegarLoop]: Abstraction has 1035 states and 2278 transitions. [2021-06-05 05:04:41,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 2278 transitions. [2021-06-05 05:04:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:04:41,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:41,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:41,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 05:04:41,771 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:41,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:41,772 INFO L82 PathProgramCache]: Analyzing trace with hash 655092438, now seen corresponding path program 1 times [2021-06-05 05:04:41,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:41,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484347241] [2021-06-05 05:04:41,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:04:41,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:41,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484347241] [2021-06-05 05:04:41,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484347241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:41,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704089837] [2021-06-05 05:04:41,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:41,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:04:41,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:04:41,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704089837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:41,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:41,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 05:04:41,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864582068] [2021-06-05 05:04:41,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:04:41,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:41,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:04:41,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:04:41,961 INFO L87 Difference]: Start difference. First operand 1035 states and 2278 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:42,011 INFO L93 Difference]: Finished difference Result 1734 states and 3766 transitions. [2021-06-05 05:04:42,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:04:42,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:04:42,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:42,018 INFO L225 Difference]: With dead ends: 1734 [2021-06-05 05:04:42,018 INFO L226 Difference]: Without dead ends: 1715 [2021-06-05 05:04:42,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:04:42,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-06-05 05:04:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1571. [2021-06-05 05:04:42,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.212738853503185) internal successors, (3474), 1570 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3474 transitions. [2021-06-05 05:04:42,056 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3474 transitions. Word has length 31 [2021-06-05 05:04:42,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:42,056 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3474 transitions. [2021-06-05 05:04:42,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:42,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3474 transitions. [2021-06-05 05:04:42,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:04:42,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:42,059 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:42,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 05:04:42,282 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:42,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1389409942, now seen corresponding path program 2 times [2021-06-05 05:04:42,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:42,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008384848] [2021-06-05 05:04:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:04:42,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:42,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008384848] [2021-06-05 05:04:42,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008384848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:42,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247455267] [2021-06-05 05:04:42,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:42,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:42,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:42,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:04:42,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:04:42,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247455267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:42,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:42,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 05:04:42,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962817265] [2021-06-05 05:04:42,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:04:42,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:42,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:04:42,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:04:42,448 INFO L87 Difference]: Start difference. First operand 1571 states and 3474 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:42,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:42,503 INFO L93 Difference]: Finished difference Result 2696 states and 5884 transitions. [2021-06-05 05:04:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:04:42,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:04:42,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:42,513 INFO L225 Difference]: With dead ends: 2696 [2021-06-05 05:04:42,514 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 05:04:42,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:04:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 05:04:42,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2412. [2021-06-05 05:04:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.2310244711737868) internal successors, (5379), 2411 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:42,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 5379 transitions. [2021-06-05 05:04:42,574 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 5379 transitions. Word has length 31 [2021-06-05 05:04:42,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:42,574 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 5379 transitions. [2021-06-05 05:04:42,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:42,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 5379 transitions. [2021-06-05 05:04:42,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:04:42,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:42,579 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:42,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:04:42,801 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:42,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:42,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1015199406, now seen corresponding path program 3 times [2021-06-05 05:04:42,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:42,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819160604] [2021-06-05 05:04:42,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:42,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:42,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819160604] [2021-06-05 05:04:42,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819160604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:42,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957140441] [2021-06-05 05:04:42,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:42,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:04:42,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:42,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:04:42,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:42,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957140441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:42,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:42,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:04:42,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653009764] [2021-06-05 05:04:42,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:42,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:42,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:42,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:42,994 INFO L87 Difference]: Start difference. First operand 2412 states and 5379 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:43,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:43,061 INFO L93 Difference]: Finished difference Result 4261 states and 9366 transitions. [2021-06-05 05:04:43,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:04:43,062 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:04:43,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:43,077 INFO L225 Difference]: With dead ends: 4261 [2021-06-05 05:04:43,077 INFO L226 Difference]: Without dead ends: 4236 [2021-06-05 05:04:43,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:43,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2021-06-05 05:04:43,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 3410. [2021-06-05 05:04:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3409 states have (on average 2.24435318275154) internal successors, (7651), 3409 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 7651 transitions. [2021-06-05 05:04:43,155 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 7651 transitions. Word has length 31 [2021-06-05 05:04:43,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:43,155 INFO L482 AbstractCegarLoop]: Abstraction has 3410 states and 7651 transitions. [2021-06-05 05:04:43,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:43,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 7651 transitions. [2021-06-05 05:04:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:04:43,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:43,161 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:43,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 05:04:43,377 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:43,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:43,377 INFO L82 PathProgramCache]: Analyzing trace with hash -2091115922, now seen corresponding path program 4 times [2021-06-05 05:04:43,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:43,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024361050] [2021-06-05 05:04:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:43,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:43,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024361050] [2021-06-05 05:04:43,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024361050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:43,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452434604] [2021-06-05 05:04:43,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:43,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:43,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:43,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:04:43,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:43,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452434604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:43,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:43,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:04:43,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672653398] [2021-06-05 05:04:43,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:43,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:43,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:43,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:43,533 INFO L87 Difference]: Start difference. First operand 3410 states and 7651 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:43,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:43,590 INFO L93 Difference]: Finished difference Result 4354 states and 9576 transitions. [2021-06-05 05:04:43,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:04:43,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:04:43,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:43,604 INFO L225 Difference]: With dead ends: 4354 [2021-06-05 05:04:43,604 INFO L226 Difference]: Without dead ends: 4335 [2021-06-05 05:04:43,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:43,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-06-05 05:04:43,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 3543. [2021-06-05 05:04:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 2.2478825522303785) internal successors, (7962), 3542 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 7962 transitions. [2021-06-05 05:04:43,711 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 7962 transitions. Word has length 31 [2021-06-05 05:04:43,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:43,711 INFO L482 AbstractCegarLoop]: Abstraction has 3543 states and 7962 transitions. [2021-06-05 05:04:43,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:43,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 7962 transitions. [2021-06-05 05:04:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:04:43,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:43,718 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:43,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:04:43,941 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:43,941 INFO L82 PathProgramCache]: Analyzing trace with hash 702036756, now seen corresponding path program 5 times [2021-06-05 05:04:43,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:43,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211693219] [2021-06-05 05:04:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:04:43,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:43,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211693219] [2021-06-05 05:04:43,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211693219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:43,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337607503] [2021-06-05 05:04:43,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:44,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:04:44,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:44,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:04:44,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:04:44,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337607503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:44,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:44,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 05:04:44,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364966958] [2021-06-05 05:04:44,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:04:44,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:44,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:04:44,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:04:44,081 INFO L87 Difference]: Start difference. First operand 3543 states and 7962 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:44,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:44,123 INFO L93 Difference]: Finished difference Result 4170 states and 9274 transitions. [2021-06-05 05:04:44,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:04:44,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:04:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:44,136 INFO L225 Difference]: With dead ends: 4170 [2021-06-05 05:04:44,137 INFO L226 Difference]: Without dead ends: 4151 [2021-06-05 05:04:44,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:04:44,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-05 05:04:44,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3929. [2021-06-05 05:04:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3928 states have (on average 2.253818737270876) internal successors, (8853), 3928 states have internal predecessors, (8853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:44,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 8853 transitions. [2021-06-05 05:04:44,220 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 8853 transitions. Word has length 31 [2021-06-05 05:04:44,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:44,220 INFO L482 AbstractCegarLoop]: Abstraction has 3929 states and 8853 transitions. [2021-06-05 05:04:44,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:44,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 8853 transitions. [2021-06-05 05:04:44,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:04:44,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:44,227 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:44,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 05:04:44,450 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:44,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:44,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1049711310, now seen corresponding path program 6 times [2021-06-05 05:04:44,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:44,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118468615] [2021-06-05 05:04:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:44,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:44,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118468615] [2021-06-05 05:04:44,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118468615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:44,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882519215] [2021-06-05 05:04:44,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:44,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:04:44,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:44,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:04:44,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:44,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882519215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:44,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:44,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:04:44,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877937024] [2021-06-05 05:04:44,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:44,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:44,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:44,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:44,592 INFO L87 Difference]: Start difference. First operand 3929 states and 8853 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:44,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:44,658 INFO L93 Difference]: Finished difference Result 5348 states and 11836 transitions. [2021-06-05 05:04:44,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:04:44,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:04:44,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:44,676 INFO L225 Difference]: With dead ends: 5348 [2021-06-05 05:04:44,676 INFO L226 Difference]: Without dead ends: 5329 [2021-06-05 05:04:44,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:44,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-06-05 05:04:44,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 4092. [2021-06-05 05:04:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4092 states, 4091 states have (on average 2.2561720850647764) internal successors, (9230), 4091 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:44,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4092 states to 4092 states and 9230 transitions. [2021-06-05 05:04:44,776 INFO L78 Accepts]: Start accepts. Automaton has 4092 states and 9230 transitions. Word has length 31 [2021-06-05 05:04:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:44,776 INFO L482 AbstractCegarLoop]: Abstraction has 4092 states and 9230 transitions. [2021-06-05 05:04:44,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:44,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4092 states and 9230 transitions. [2021-06-05 05:04:44,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:04:44,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:44,783 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:44,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:44,997 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:44,997 INFO L82 PathProgramCache]: Analyzing trace with hash -2056604018, now seen corresponding path program 7 times [2021-06-05 05:04:44,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:44,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456590239] [2021-06-05 05:04:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:45,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:45,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456590239] [2021-06-05 05:04:45,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456590239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:45,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986064683] [2021-06-05 05:04:45,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:45,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:04:45,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:45,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986064683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:45,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:45,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:04:45,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007494711] [2021-06-05 05:04:45,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:45,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:45,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:45,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:45,168 INFO L87 Difference]: Start difference. First operand 4092 states and 9230 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:45,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:45,228 INFO L93 Difference]: Finished difference Result 5419 states and 11952 transitions. [2021-06-05 05:04:45,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:04:45,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:04:45,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:45,238 INFO L225 Difference]: With dead ends: 5419 [2021-06-05 05:04:45,238 INFO L226 Difference]: Without dead ends: 5400 [2021-06-05 05:04:45,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:45,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2021-06-05 05:04:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 2885. [2021-06-05 05:04:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 2884 states have (on average 2.235090152565881) internal successors, (6446), 2884 states have internal predecessors, (6446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 6446 transitions. [2021-06-05 05:04:45,298 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 6446 transitions. Word has length 31 [2021-06-05 05:04:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:45,298 INFO L482 AbstractCegarLoop]: Abstraction has 2885 states and 6446 transitions. [2021-06-05 05:04:45,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 6446 transitions. [2021-06-05 05:04:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:04:45,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:45,303 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:45,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:45,525 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:45,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:45,526 INFO L82 PathProgramCache]: Analyzing trace with hash 467136390, now seen corresponding path program 8 times [2021-06-05 05:04:45,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:45,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577206786] [2021-06-05 05:04:45,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:45,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:45,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577206786] [2021-06-05 05:04:45,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577206786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:45,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969443552] [2021-06-05 05:04:45,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:45,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:45,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:45,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:04:45,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:45,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969443552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:45,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:45,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:04:45,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637416517] [2021-06-05 05:04:45,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:04:45,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:45,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:04:45,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:04:45,705 INFO L87 Difference]: Start difference. First operand 2885 states and 6446 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:45,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:45,827 INFO L93 Difference]: Finished difference Result 5635 states and 12327 transitions. [2021-06-05 05:04:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:45,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:04:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:45,836 INFO L225 Difference]: With dead ends: 5635 [2021-06-05 05:04:45,837 INFO L226 Difference]: Without dead ends: 5635 [2021-06-05 05:04:45,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:04:45,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5635 states. [2021-06-05 05:04:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5635 to 3879. [2021-06-05 05:04:45,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3879 states, 3878 states have (on average 2.2439401753481176) internal successors, (8702), 3878 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 8702 transitions. [2021-06-05 05:04:45,910 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 8702 transitions. Word has length 36 [2021-06-05 05:04:45,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:45,910 INFO L482 AbstractCegarLoop]: Abstraction has 3879 states and 8702 transitions. [2021-06-05 05:04:45,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:45,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 8702 transitions. [2021-06-05 05:04:45,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:04:45,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:45,916 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:46,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 05:04:46,133 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:46,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1694057605, now seen corresponding path program 9 times [2021-06-05 05:04:46,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:46,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710681800] [2021-06-05 05:04:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:46,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:46,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710681800] [2021-06-05 05:04:46,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710681800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:46,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277477238] [2021-06-05 05:04:46,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:46,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:04:46,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:46,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:04:46,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:46,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277477238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:46,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:46,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:04:46,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242354887] [2021-06-05 05:04:46,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:04:46,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:46,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:04:46,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:04:46,298 INFO L87 Difference]: Start difference. First operand 3879 states and 8702 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:46,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:46,420 INFO L93 Difference]: Finished difference Result 7170 states and 15945 transitions. [2021-06-05 05:04:46,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:04:46,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:04:46,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:46,431 INFO L225 Difference]: With dead ends: 7170 [2021-06-05 05:04:46,431 INFO L226 Difference]: Without dead ends: 7072 [2021-06-05 05:04:46,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:04:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7072 states. [2021-06-05 05:04:46,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7072 to 6656. [2021-06-05 05:04:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 6655 states have (on average 2.251089406461307) internal successors, (14981), 6655 states have internal predecessors, (14981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 14981 transitions. [2021-06-05 05:04:46,574 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 14981 transitions. Word has length 36 [2021-06-05 05:04:46,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:46,574 INFO L482 AbstractCegarLoop]: Abstraction has 6656 states and 14981 transitions. [2021-06-05 05:04:46,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:46,574 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 14981 transitions. [2021-06-05 05:04:46,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:04:46,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:46,583 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:46,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:46,797 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:46,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:46,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1866861137, now seen corresponding path program 10 times [2021-06-05 05:04:46,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:46,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654351270] [2021-06-05 05:04:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:46,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:46,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654351270] [2021-06-05 05:04:46,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654351270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:46,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738910091] [2021-06-05 05:04:46,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:46,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:46,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:46,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:04:46,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:46,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738910091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:46,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:46,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:04:46,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261936755] [2021-06-05 05:04:46,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:46,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:46,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:46,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:46,930 INFO L87 Difference]: Start difference. First operand 6656 states and 14981 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:47,004 INFO L93 Difference]: Finished difference Result 6984 states and 15407 transitions. [2021-06-05 05:04:47,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:47,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:04:47,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:47,017 INFO L225 Difference]: With dead ends: 6984 [2021-06-05 05:04:47,017 INFO L226 Difference]: Without dead ends: 6984 [2021-06-05 05:04:47,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:04:47,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6984 states. [2021-06-05 05:04:47,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6984 to 6596. [2021-06-05 05:04:47,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.234571645185747) internal successors, (14737), 6595 states have internal predecessors, (14737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:47,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 14737 transitions. [2021-06-05 05:04:47,124 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 14737 transitions. Word has length 36 [2021-06-05 05:04:47,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:47,124 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 14737 transitions. [2021-06-05 05:04:47,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:47,125 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 14737 transitions. [2021-06-05 05:04:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:04:47,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:47,137 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:47,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:04:47,359 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:47,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:47,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1660386298, now seen corresponding path program 11 times [2021-06-05 05:04:47,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:47,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441808218] [2021-06-05 05:04:47,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:47,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:47,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441808218] [2021-06-05 05:04:47,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441808218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:47,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286225275] [2021-06-05 05:04:47,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:47,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:04:47,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:47,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:04:47,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:47,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286225275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:47,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:47,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:04:47,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324086504] [2021-06-05 05:04:47,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:47,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:47,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:47,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:47,495 INFO L87 Difference]: Start difference. First operand 6596 states and 14737 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:47,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:47,582 INFO L93 Difference]: Finished difference Result 7018 states and 15447 transitions. [2021-06-05 05:04:47,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:47,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:04:47,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:47,595 INFO L225 Difference]: With dead ends: 7018 [2021-06-05 05:04:47,596 INFO L226 Difference]: Without dead ends: 7014 [2021-06-05 05:04:47,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:04:47,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2021-06-05 05:04:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 6152. [2021-06-05 05:04:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6152 states, 6151 states have (on average 2.238497805234921) internal successors, (13769), 6151 states have internal predecessors, (13769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6152 states to 6152 states and 13769 transitions. [2021-06-05 05:04:47,733 INFO L78 Accepts]: Start accepts. Automaton has 6152 states and 13769 transitions. Word has length 36 [2021-06-05 05:04:47,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:47,733 INFO L482 AbstractCegarLoop]: Abstraction has 6152 states and 13769 transitions. [2021-06-05 05:04:47,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand 6152 states and 13769 transitions. [2021-06-05 05:04:47,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:04:47,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:47,741 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:47,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 05:04:47,957 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash -542761274, now seen corresponding path program 12 times [2021-06-05 05:04:47,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:47,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147470626] [2021-06-05 05:04:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:48,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:48,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147470626] [2021-06-05 05:04:48,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147470626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:48,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465347353] [2021-06-05 05:04:48,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:48,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:04:48,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:48,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:04:48,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:48,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465347353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:48,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:48,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:04:48,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488676551] [2021-06-05 05:04:48,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:48,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:48,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:48,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:48,109 INFO L87 Difference]: Start difference. First operand 6152 states and 13769 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:48,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:48,203 INFO L93 Difference]: Finished difference Result 9612 states and 21128 transitions. [2021-06-05 05:04:48,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:48,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:04:48,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:48,217 INFO L225 Difference]: With dead ends: 9612 [2021-06-05 05:04:48,217 INFO L226 Difference]: Without dead ends: 9612 [2021-06-05 05:04:48,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:04:48,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9612 states. [2021-06-05 05:04:48,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9612 to 8560. [2021-06-05 05:04:48,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8560 states, 8559 states have (on average 2.2475756513611405) internal successors, (19237), 8559 states have internal predecessors, (19237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:48,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8560 states to 8560 states and 19237 transitions. [2021-06-05 05:04:48,363 INFO L78 Accepts]: Start accepts. Automaton has 8560 states and 19237 transitions. Word has length 36 [2021-06-05 05:04:48,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:48,364 INFO L482 AbstractCegarLoop]: Abstraction has 8560 states and 19237 transitions. [2021-06-05 05:04:48,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:48,364 INFO L276 IsEmpty]: Start isEmpty. Operand 8560 states and 19237 transitions. [2021-06-05 05:04:48,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:04:48,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:48,373 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:48,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 05:04:48,595 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:48,595 INFO L82 PathProgramCache]: Analyzing trace with hash 452193595, now seen corresponding path program 13 times [2021-06-05 05:04:48,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:48,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577312742] [2021-06-05 05:04:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:48,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:48,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577312742] [2021-06-05 05:04:48,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577312742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:48,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392976618] [2021-06-05 05:04:48,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:48,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:04:48,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:48,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392976618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:48,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:48,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:04:48,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542142892] [2021-06-05 05:04:48,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:48,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:48,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:48,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:48,727 INFO L87 Difference]: Start difference. First operand 8560 states and 19237 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:48,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:48,822 INFO L93 Difference]: Finished difference Result 10199 states and 22770 transitions. [2021-06-05 05:04:48,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:48,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:04:48,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:48,837 INFO L225 Difference]: With dead ends: 10199 [2021-06-05 05:04:48,837 INFO L226 Difference]: Without dead ends: 10193 [2021-06-05 05:04:48,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:04:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10193 states. [2021-06-05 05:04:48,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10193 to 9772. [2021-06-05 05:04:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9772 states, 9771 states have (on average 2.2569849554805037) internal successors, (22053), 9771 states have internal predecessors, (22053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 22053 transitions. [2021-06-05 05:04:49,022 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 22053 transitions. Word has length 36 [2021-06-05 05:04:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:49,022 INFO L482 AbstractCegarLoop]: Abstraction has 9772 states and 22053 transitions. [2021-06-05 05:04:49,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:49,022 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 22053 transitions. [2021-06-05 05:04:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:04:49,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:49,030 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:49,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 05:04:49,245 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:49,245 INFO L82 PathProgramCache]: Analyzing trace with hash 756919215, now seen corresponding path program 14 times [2021-06-05 05:04:49,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:49,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419107142] [2021-06-05 05:04:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:49,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:49,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419107142] [2021-06-05 05:04:49,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419107142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:49,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701396503] [2021-06-05 05:04:49,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:49,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:49,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:49,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:04:49,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:49,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701396503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:49,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:49,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:04:49,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52192586] [2021-06-05 05:04:49,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:49,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:49,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:49,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:49,368 INFO L87 Difference]: Start difference. First operand 9772 states and 22053 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:49,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:49,445 INFO L93 Difference]: Finished difference Result 10439 states and 23230 transitions. [2021-06-05 05:04:49,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:49,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:04:49,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:49,459 INFO L225 Difference]: With dead ends: 10439 [2021-06-05 05:04:49,459 INFO L226 Difference]: Without dead ends: 10437 [2021-06-05 05:04:49,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:04:49,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10437 states. [2021-06-05 05:04:49,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10437 to 9840. [2021-06-05 05:04:49,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9840 states, 9839 states have (on average 2.252363045024901) internal successors, (22161), 9839 states have internal predecessors, (22161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9840 states to 9840 states and 22161 transitions. [2021-06-05 05:04:49,627 INFO L78 Accepts]: Start accepts. Automaton has 9840 states and 22161 transitions. Word has length 36 [2021-06-05 05:04:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:49,627 INFO L482 AbstractCegarLoop]: Abstraction has 9840 states and 22161 transitions. [2021-06-05 05:04:49,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 9840 states and 22161 transitions. [2021-06-05 05:04:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:04:49,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:49,636 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:49,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 05:04:49,857 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:49,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:49,858 INFO L82 PathProgramCache]: Analyzing trace with hash 963394054, now seen corresponding path program 15 times [2021-06-05 05:04:49,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:49,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539619383] [2021-06-05 05:04:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:49,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:49,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539619383] [2021-06-05 05:04:49,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539619383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:49,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495956263] [2021-06-05 05:04:49,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:49,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:04:49,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:49,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:04:49,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:04:50,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495956263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:50,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:50,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-06-05 05:04:50,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412134286] [2021-06-05 05:04:50,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:04:50,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:50,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:04:50,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:04:50,014 INFO L87 Difference]: Start difference. First operand 9840 states and 22161 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:50,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:50,431 INFO L93 Difference]: Finished difference Result 16933 states and 36602 transitions. [2021-06-05 05:04:50,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:04:50,431 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:04:50,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:50,447 INFO L225 Difference]: With dead ends: 16933 [2021-06-05 05:04:50,448 INFO L226 Difference]: Without dead ends: 16887 [2021-06-05 05:04:50,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:04:50,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16887 states. [2021-06-05 05:04:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16887 to 11694. [2021-06-05 05:04:50,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11694 states, 11693 states have (on average 2.213033438809544) internal successors, (25877), 11693 states have internal predecessors, (25877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:50,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11694 states to 11694 states and 25877 transitions. [2021-06-05 05:04:50,667 INFO L78 Accepts]: Start accepts. Automaton has 11694 states and 25877 transitions. Word has length 36 [2021-06-05 05:04:50,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:50,667 INFO L482 AbstractCegarLoop]: Abstraction has 11694 states and 25877 transitions. [2021-06-05 05:04:50,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:50,668 INFO L276 IsEmpty]: Start isEmpty. Operand 11694 states and 25877 transitions. [2021-06-05 05:04:50,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:04:50,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:50,679 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:50,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:50,901 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:50,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:50,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1147123141, now seen corresponding path program 16 times [2021-06-05 05:04:50,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:50,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618452560] [2021-06-05 05:04:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:50,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:50,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618452560] [2021-06-05 05:04:50,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618452560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:50,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392474035] [2021-06-05 05:04:50,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:50,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:50,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:50,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:04:50,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:51,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392474035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:51,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:51,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:04:51,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919005380] [2021-06-05 05:04:51,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:04:51,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:51,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:04:51,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:51,018 INFO L87 Difference]: Start difference. First operand 11694 states and 25877 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:51,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:51,125 INFO L93 Difference]: Finished difference Result 12577 states and 27332 transitions. [2021-06-05 05:04:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:51,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:04:51,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:51,139 INFO L225 Difference]: With dead ends: 12577 [2021-06-05 05:04:51,140 INFO L226 Difference]: Without dead ends: 12575 [2021-06-05 05:04:51,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:04:51,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12575 states. [2021-06-05 05:04:51,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12575 to 11238. [2021-06-05 05:04:51,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11238 states, 11237 states have (on average 2.20352407226128) internal successors, (24761), 11237 states have internal predecessors, (24761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:51,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11238 states to 11238 states and 24761 transitions. [2021-06-05 05:04:51,365 INFO L78 Accepts]: Start accepts. Automaton has 11238 states and 24761 transitions. Word has length 36 [2021-06-05 05:04:51,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:51,366 INFO L482 AbstractCegarLoop]: Abstraction has 11238 states and 24761 transitions. [2021-06-05 05:04:51,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:51,367 INFO L276 IsEmpty]: Start isEmpty. Operand 11238 states and 24761 transitions. [2021-06-05 05:04:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:04:51,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:51,374 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:51,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 05:04:51,596 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:51,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:51,597 INFO L82 PathProgramCache]: Analyzing trace with hash 973386407, now seen corresponding path program 17 times [2021-06-05 05:04:51,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:51,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159570025] [2021-06-05 05:04:51,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:04:51,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:51,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159570025] [2021-06-05 05:04:51,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159570025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:51,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781539406] [2021-06-05 05:04:51,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:51,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:04:51,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:51,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:04:51,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:04:51,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781539406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:51,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:51,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:04:51,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527256776] [2021-06-05 05:04:51,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:04:51,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:51,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:04:51,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:51,714 INFO L87 Difference]: Start difference. First operand 11238 states and 24761 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:51,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:51,821 INFO L93 Difference]: Finished difference Result 11745 states and 25558 transitions. [2021-06-05 05:04:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:04:51,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:04:51,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:51,836 INFO L225 Difference]: With dead ends: 11745 [2021-06-05 05:04:51,836 INFO L226 Difference]: Without dead ends: 11709 [2021-06-05 05:04:51,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:04:51,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11709 states. [2021-06-05 05:04:51,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11709 to 11232. [2021-06-05 05:04:51,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 11231 states have (on average 2.19740005342356) internal successors, (24679), 11231 states have internal predecessors, (24679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:52,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 24679 transitions. [2021-06-05 05:04:52,101 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 24679 transitions. Word has length 36 [2021-06-05 05:04:52,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:52,101 INFO L482 AbstractCegarLoop]: Abstraction has 11232 states and 24679 transitions. [2021-06-05 05:04:52,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:52,101 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 24679 transitions. [2021-06-05 05:04:52,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:04:52,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:52,107 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:52,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:52,325 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:52,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1610257349, now seen corresponding path program 18 times [2021-06-05 05:04:52,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:52,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934966909] [2021-06-05 05:04:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:52,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:52,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934966909] [2021-06-05 05:04:52,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934966909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:52,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943931696] [2021-06-05 05:04:52,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:52,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:04:52,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:52,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:04:52,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:52,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943931696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:52,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:52,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:04:52,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342858487] [2021-06-05 05:04:52,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:52,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:52,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:52,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:52,533 INFO L87 Difference]: Start difference. First operand 11232 states and 24679 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:52,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:52,626 INFO L93 Difference]: Finished difference Result 13428 states and 29318 transitions. [2021-06-05 05:04:52,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:52,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:04:52,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:52,639 INFO L225 Difference]: With dead ends: 13428 [2021-06-05 05:04:52,639 INFO L226 Difference]: Without dead ends: 13422 [2021-06-05 05:04:52,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:04:52,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13422 states. [2021-06-05 05:04:52,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13422 to 12944. [2021-06-05 05:04:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12944 states, 12943 states have (on average 2.2074480414123463) internal successors, (28571), 12943 states have internal predecessors, (28571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:52,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12944 states to 12944 states and 28571 transitions. [2021-06-05 05:04:52,860 INFO L78 Accepts]: Start accepts. Automaton has 12944 states and 28571 transitions. Word has length 36 [2021-06-05 05:04:52,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:52,861 INFO L482 AbstractCegarLoop]: Abstraction has 12944 states and 28571 transitions. [2021-06-05 05:04:52,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:52,861 INFO L276 IsEmpty]: Start isEmpty. Operand 12944 states and 28571 transitions. [2021-06-05 05:04:52,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:04:52,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:52,872 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:53,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 05:04:53,077 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:53,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:53,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1305531729, now seen corresponding path program 19 times [2021-06-05 05:04:53,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:53,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189541949] [2021-06-05 05:04:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:53,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:53,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189541949] [2021-06-05 05:04:53,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189541949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:53,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138161124] [2021-06-05 05:04:53,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:53,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:04:53,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:53,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138161124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:53,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:53,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:04:53,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372161432] [2021-06-05 05:04:53,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:53,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:53,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:53,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:53,237 INFO L87 Difference]: Start difference. First operand 12944 states and 28571 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:53,318 INFO L93 Difference]: Finished difference Result 13864 states and 30236 transitions. [2021-06-05 05:04:53,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:53,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:04:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:53,331 INFO L225 Difference]: With dead ends: 13864 [2021-06-05 05:04:53,331 INFO L226 Difference]: Without dead ends: 13864 [2021-06-05 05:04:53,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:04:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13864 states. [2021-06-05 05:04:53,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13864 to 12976. [2021-06-05 05:04:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12976 states, 12975 states have (on average 2.206936416184971) internal successors, (28635), 12975 states have internal predecessors, (28635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:53,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12976 states to 12976 states and 28635 transitions. [2021-06-05 05:04:53,502 INFO L78 Accepts]: Start accepts. Automaton has 12976 states and 28635 transitions. Word has length 36 [2021-06-05 05:04:53,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:53,502 INFO L482 AbstractCegarLoop]: Abstraction has 12976 states and 28635 transitions. [2021-06-05 05:04:53,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:53,502 INFO L276 IsEmpty]: Start isEmpty. Operand 12976 states and 28635 transitions. [2021-06-05 05:04:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:04:53,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:53,510 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:53,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:53,716 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:53,716 INFO L82 PathProgramCache]: Analyzing trace with hash -915327803, now seen corresponding path program 20 times [2021-06-05 05:04:53,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:53,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929332794] [2021-06-05 05:04:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:53,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:53,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929332794] [2021-06-05 05:04:53,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929332794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:53,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133981726] [2021-06-05 05:04:53,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:53,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:53,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:53,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:04:53,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:53,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133981726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:53,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:53,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:04:53,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502554821] [2021-06-05 05:04:53,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:04:53,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:53,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:04:53,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:53,854 INFO L87 Difference]: Start difference. First operand 12976 states and 28635 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:53,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:53,983 INFO L93 Difference]: Finished difference Result 14564 states and 31706 transitions. [2021-06-05 05:04:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:04:53,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:04:53,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:53,997 INFO L225 Difference]: With dead ends: 14564 [2021-06-05 05:04:53,997 INFO L226 Difference]: Without dead ends: 14564 [2021-06-05 05:04:53,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:04:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14564 states. [2021-06-05 05:04:54,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14564 to 13136. [2021-06-05 05:04:54,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13136 states, 13135 states have (on average 2.204415683288923) internal successors, (28955), 13135 states have internal predecessors, (28955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13136 states to 13136 states and 28955 transitions. [2021-06-05 05:04:54,195 INFO L78 Accepts]: Start accepts. Automaton has 13136 states and 28955 transitions. Word has length 36 [2021-06-05 05:04:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:54,195 INFO L482 AbstractCegarLoop]: Abstraction has 13136 states and 28955 transitions. [2021-06-05 05:04:54,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand 13136 states and 28955 transitions. [2021-06-05 05:04:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:04:54,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:54,201 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:54,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 05:04:54,401 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:54,402 INFO L82 PathProgramCache]: Analyzing trace with hash 537537127, now seen corresponding path program 21 times [2021-06-05 05:04:54,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:54,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832559089] [2021-06-05 05:04:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:54,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:54,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832559089] [2021-06-05 05:04:54,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832559089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:54,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312431066] [2021-06-05 05:04:54,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:54,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:04:54,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:54,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:04:54,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:54,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312431066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:54,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:54,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:04:54,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565761974] [2021-06-05 05:04:54,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:04:54,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:54,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:04:54,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:04:54,526 INFO L87 Difference]: Start difference. First operand 13136 states and 28955 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:54,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:54,655 INFO L93 Difference]: Finished difference Result 14130 states and 30823 transitions. [2021-06-05 05:04:54,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:54,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:04:54,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:54,774 INFO L225 Difference]: With dead ends: 14130 [2021-06-05 05:04:54,774 INFO L226 Difference]: Without dead ends: 14130 [2021-06-05 05:04:54,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:04:54,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14130 states. [2021-06-05 05:04:54,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14130 to 12516. [2021-06-05 05:04:54,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12516 states, 12515 states have (on average 2.204314822213344) internal successors, (27587), 12515 states have internal predecessors, (27587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:54,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12516 states to 12516 states and 27587 transitions. [2021-06-05 05:04:54,915 INFO L78 Accepts]: Start accepts. Automaton has 12516 states and 27587 transitions. Word has length 36 [2021-06-05 05:04:54,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:54,915 INFO L482 AbstractCegarLoop]: Abstraction has 12516 states and 27587 transitions. [2021-06-05 05:04:54,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:54,915 INFO L276 IsEmpty]: Start isEmpty. Operand 12516 states and 27587 transitions. [2021-06-05 05:04:54,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:04:54,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:54,924 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:55,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:55,129 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:55,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:55,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1450078555, now seen corresponding path program 22 times [2021-06-05 05:04:55,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:55,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065167836] [2021-06-05 05:04:55,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:55,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:55,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065167836] [2021-06-05 05:04:55,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065167836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:55,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325509216] [2021-06-05 05:04:55,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:55,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:55,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:55,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:04:55,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:55,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325509216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:55,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:55,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:04:55,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049939137] [2021-06-05 05:04:55,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:04:55,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:55,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:04:55,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:04:55,278 INFO L87 Difference]: Start difference. First operand 12516 states and 27587 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:55,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:55,507 INFO L93 Difference]: Finished difference Result 15926 states and 34731 transitions. [2021-06-05 05:04:55,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:04:55,508 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:04:55,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:55,524 INFO L225 Difference]: With dead ends: 15926 [2021-06-05 05:04:55,528 INFO L226 Difference]: Without dead ends: 15926 [2021-06-05 05:04:55,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:55,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15926 states. [2021-06-05 05:04:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15926 to 13120. [2021-06-05 05:04:55,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13120 states, 13119 states have (on average 2.2095434103209084) internal successors, (28987), 13119 states have internal predecessors, (28987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:55,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13120 states to 13120 states and 28987 transitions. [2021-06-05 05:04:55,691 INFO L78 Accepts]: Start accepts. Automaton has 13120 states and 28987 transitions. Word has length 46 [2021-06-05 05:04:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:55,691 INFO L482 AbstractCegarLoop]: Abstraction has 13120 states and 28987 transitions. [2021-06-05 05:04:55,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 13120 states and 28987 transitions. [2021-06-05 05:04:55,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:04:55,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:55,703 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:55,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 05:04:55,917 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:55,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:55,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1917671971, now seen corresponding path program 23 times [2021-06-05 05:04:55,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:55,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82917005] [2021-06-05 05:04:55,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:55,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:55,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82917005] [2021-06-05 05:04:55,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82917005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:55,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716355194] [2021-06-05 05:04:55,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:56,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:04:56,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:56,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:04:56,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:56,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716355194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:56,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:56,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:04:56,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521335692] [2021-06-05 05:04:56,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:04:56,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:56,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:04:56,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:56,086 INFO L87 Difference]: Start difference. First operand 13120 states and 28987 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:56,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:56,263 INFO L93 Difference]: Finished difference Result 13630 states and 29839 transitions. [2021-06-05 05:04:56,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:04:56,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:04:56,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:56,279 INFO L225 Difference]: With dead ends: 13630 [2021-06-05 05:04:56,279 INFO L226 Difference]: Without dead ends: 13622 [2021-06-05 05:04:56,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:04:56,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13622 states. [2021-06-05 05:04:56,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13622 to 13056. [2021-06-05 05:04:56,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13056 states, 13055 states have (on average 2.2050555342780545) internal successors, (28787), 13055 states have internal predecessors, (28787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:56,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13056 states to 13056 states and 28787 transitions. [2021-06-05 05:04:56,449 INFO L78 Accepts]: Start accepts. Automaton has 13056 states and 28787 transitions. Word has length 46 [2021-06-05 05:04:56,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:56,449 INFO L482 AbstractCegarLoop]: Abstraction has 13056 states and 28787 transitions. [2021-06-05 05:04:56,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:56,449 INFO L276 IsEmpty]: Start isEmpty. Operand 13056 states and 28787 transitions. [2021-06-05 05:04:56,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:04:56,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:56,465 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:56,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:56,681 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:56,681 INFO L82 PathProgramCache]: Analyzing trace with hash -613294009, now seen corresponding path program 24 times [2021-06-05 05:04:56,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:56,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649473235] [2021-06-05 05:04:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:56,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:56,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649473235] [2021-06-05 05:04:56,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649473235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:56,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345581620] [2021-06-05 05:04:56,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:56,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:04:56,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:56,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:04:56,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:56,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345581620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:56,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:56,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:04:56,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347369663] [2021-06-05 05:04:56,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:04:56,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:56,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:04:56,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:56,835 INFO L87 Difference]: Start difference. First operand 13056 states and 28787 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:56,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:56,970 INFO L93 Difference]: Finished difference Result 17393 states and 37929 transitions. [2021-06-05 05:04:56,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:04:56,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:04:56,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:56,993 INFO L225 Difference]: With dead ends: 17393 [2021-06-05 05:04:56,993 INFO L226 Difference]: Without dead ends: 17393 [2021-06-05 05:04:56,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:04:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17393 states. [2021-06-05 05:04:57,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17393 to 15686. [2021-06-05 05:04:57,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15686 states, 15685 states have (on average 2.224099458080969) internal successors, (34885), 15685 states have internal predecessors, (34885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15686 states to 15686 states and 34885 transitions. [2021-06-05 05:04:57,231 INFO L78 Accepts]: Start accepts. Automaton has 15686 states and 34885 transitions. Word has length 46 [2021-06-05 05:04:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:57,231 INFO L482 AbstractCegarLoop]: Abstraction has 15686 states and 34885 transitions. [2021-06-05 05:04:57,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 15686 states and 34885 transitions. [2021-06-05 05:04:57,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:04:57,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:57,241 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:57,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 05:04:57,449 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:57,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:57,449 INFO L82 PathProgramCache]: Analyzing trace with hash 556761991, now seen corresponding path program 25 times [2021-06-05 05:04:57,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:57,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973339058] [2021-06-05 05:04:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:57,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:57,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973339058] [2021-06-05 05:04:57,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973339058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:57,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739619208] [2021-06-05 05:04:57,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:57,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:04:57,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:57,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739619208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:57,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:57,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:04:57,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181258037] [2021-06-05 05:04:57,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:04:57,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:57,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:04:57,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:57,588 INFO L87 Difference]: Start difference. First operand 15686 states and 34885 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:57,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:57,723 INFO L93 Difference]: Finished difference Result 16911 states and 36914 transitions. [2021-06-05 05:04:57,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:04:57,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:04:57,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:57,744 INFO L225 Difference]: With dead ends: 16911 [2021-06-05 05:04:57,744 INFO L226 Difference]: Without dead ends: 16863 [2021-06-05 05:04:57,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:04:57,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16863 states. [2021-06-05 05:04:57,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16863 to 14310. [2021-06-05 05:04:57,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14310 states, 14309 states have (on average 2.212104270039835) internal successors, (31653), 14309 states have internal predecessors, (31653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14310 states to 14310 states and 31653 transitions. [2021-06-05 05:04:57,973 INFO L78 Accepts]: Start accepts. Automaton has 14310 states and 31653 transitions. Word has length 46 [2021-06-05 05:04:57,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:57,973 INFO L482 AbstractCegarLoop]: Abstraction has 14310 states and 31653 transitions. [2021-06-05 05:04:57,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:57,973 INFO L276 IsEmpty]: Start isEmpty. Operand 14310 states and 31653 transitions. [2021-06-05 05:04:58,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:04:58,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:58,119 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:58,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 05:04:58,320 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:58,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:58,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1979977875, now seen corresponding path program 26 times [2021-06-05 05:04:58,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:58,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124640925] [2021-06-05 05:04:58,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:58,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:58,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124640925] [2021-06-05 05:04:58,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124640925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:58,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125958364] [2021-06-05 05:04:58,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:58,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:58,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:58,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:04:58,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:58,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125958364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:58,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:58,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:04:58,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921089661] [2021-06-05 05:04:58,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:04:58,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:58,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:04:58,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:04:58,457 INFO L87 Difference]: Start difference. First operand 14310 states and 31653 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:58,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:58,599 INFO L93 Difference]: Finished difference Result 15209 states and 33173 transitions. [2021-06-05 05:04:58,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:04:58,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:04:58,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:58,613 INFO L225 Difference]: With dead ends: 15209 [2021-06-05 05:04:58,613 INFO L226 Difference]: Without dead ends: 15137 [2021-06-05 05:04:58,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:04:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15137 states. [2021-06-05 05:04:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15137 to 14314. [2021-06-05 05:04:58,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14314 states, 14313 states have (on average 2.2051980716830855) internal successors, (31563), 14313 states have internal predecessors, (31563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:58,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14314 states to 14314 states and 31563 transitions. [2021-06-05 05:04:58,762 INFO L78 Accepts]: Start accepts. Automaton has 14314 states and 31563 transitions. Word has length 46 [2021-06-05 05:04:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:58,762 INFO L482 AbstractCegarLoop]: Abstraction has 14314 states and 31563 transitions. [2021-06-05 05:04:58,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 14314 states and 31563 transitions. [2021-06-05 05:04:58,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:04:58,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:58,771 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:58,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 05:04:58,971 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:58,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:58,972 INFO L82 PathProgramCache]: Analyzing trace with hash 443374363, now seen corresponding path program 27 times [2021-06-05 05:04:58,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:58,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547593937] [2021-06-05 05:04:58,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:04:59,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:59,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547593937] [2021-06-05 05:04:59,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547593937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:59,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131745012] [2021-06-05 05:04:59,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:59,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:04:59,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:59,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:04:59,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:04:59,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131745012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:59,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:59,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:04:59,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261156200] [2021-06-05 05:04:59,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:04:59,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:59,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:04:59,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:59,210 INFO L87 Difference]: Start difference. First operand 14314 states and 31563 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:59,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:59,328 INFO L93 Difference]: Finished difference Result 18333 states and 40131 transitions. [2021-06-05 05:04:59,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:59,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:04:59,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:59,352 INFO L225 Difference]: With dead ends: 18333 [2021-06-05 05:04:59,352 INFO L226 Difference]: Without dead ends: 18330 [2021-06-05 05:04:59,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:04:59,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18330 states. [2021-06-05 05:04:59,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18330 to 15498. [2021-06-05 05:04:59,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15498 states, 15497 states have (on average 2.2112021681615794) internal successors, (34267), 15497 states have internal predecessors, (34267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:59,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15498 states to 15498 states and 34267 transitions. [2021-06-05 05:04:59,582 INFO L78 Accepts]: Start accepts. Automaton has 15498 states and 34267 transitions. Word has length 46 [2021-06-05 05:04:59,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:59,582 INFO L482 AbstractCegarLoop]: Abstraction has 15498 states and 34267 transitions. [2021-06-05 05:04:59,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:59,583 INFO L276 IsEmpty]: Start isEmpty. Operand 15498 states and 34267 transitions. [2021-06-05 05:04:59,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:04:59,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:59,595 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:59,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 05:04:59,810 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:59,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:59,810 INFO L82 PathProgramCache]: Analyzing trace with hash 729697573, now seen corresponding path program 28 times [2021-06-05 05:04:59,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:59,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203212025] [2021-06-05 05:04:59,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:59,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:59,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203212025] [2021-06-05 05:04:59,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203212025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:59,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707707218] [2021-06-05 05:04:59,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:59,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:59,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:59,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:04:59,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:59,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707707218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:59,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:59,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:04:59,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115385644] [2021-06-05 05:04:59,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:04:59,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:59,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:04:59,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:59,953 INFO L87 Difference]: Start difference. First operand 15498 states and 34267 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:00,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:00,066 INFO L93 Difference]: Finished difference Result 20808 states and 45501 transitions. [2021-06-05 05:05:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:05:00,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:05:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:00,156 INFO L225 Difference]: With dead ends: 20808 [2021-06-05 05:05:00,156 INFO L226 Difference]: Without dead ends: 20808 [2021-06-05 05:05:00,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:05:00,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20808 states. [2021-06-05 05:05:00,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20808 to 19050. [2021-06-05 05:05:00,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19050 states, 19049 states have (on average 2.2252611685652792) internal successors, (42389), 19049 states have internal predecessors, (42389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19050 states to 19050 states and 42389 transitions. [2021-06-05 05:05:00,378 INFO L78 Accepts]: Start accepts. Automaton has 19050 states and 42389 transitions. Word has length 46 [2021-06-05 05:05:00,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:00,381 INFO L482 AbstractCegarLoop]: Abstraction has 19050 states and 42389 transitions. [2021-06-05 05:05:00,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:00,382 INFO L276 IsEmpty]: Start isEmpty. Operand 19050 states and 42389 transitions. [2021-06-05 05:05:00,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:05:00,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:00,395 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:00,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:00,595 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:00,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:00,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1899753573, now seen corresponding path program 29 times [2021-06-05 05:05:00,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:00,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440369984] [2021-06-05 05:05:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:00,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:00,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440369984] [2021-06-05 05:05:00,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440369984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:00,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726530579] [2021-06-05 05:05:00,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:00,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:05:00,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:00,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:05:00,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:00,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726530579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:00,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:00,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:05:00,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123860954] [2021-06-05 05:05:00,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:05:00,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:00,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:05:00,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:05:00,732 INFO L87 Difference]: Start difference. First operand 19050 states and 42389 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:00,871 INFO L93 Difference]: Finished difference Result 20381 states and 44592 transitions. [2021-06-05 05:05:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:05:00,872 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:05:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:00,892 INFO L225 Difference]: With dead ends: 20381 [2021-06-05 05:05:00,892 INFO L226 Difference]: Without dead ends: 20349 [2021-06-05 05:05:00,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:05:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20349 states. [2021-06-05 05:05:01,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20349 to 19030. [2021-06-05 05:05:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19030 states, 19029 states have (on average 2.2227652530348414) internal successors, (42297), 19029 states have internal predecessors, (42297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:01,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42297 transitions. [2021-06-05 05:05:01,172 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42297 transitions. Word has length 46 [2021-06-05 05:05:01,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:01,172 INFO L482 AbstractCegarLoop]: Abstraction has 19030 states and 42297 transitions. [2021-06-05 05:05:01,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:01,173 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42297 transitions. [2021-06-05 05:05:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:05:01,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:01,184 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:01,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 05:05:01,384 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:01,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:01,385 INFO L82 PathProgramCache]: Analyzing trace with hash -636986293, now seen corresponding path program 30 times [2021-06-05 05:05:01,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:01,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852729422] [2021-06-05 05:05:01,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:01,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:01,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852729422] [2021-06-05 05:05:01,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852729422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:01,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954750631] [2021-06-05 05:05:01,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:01,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:05:01,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:01,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:05:01,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:01,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954750631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:01,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:01,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:01,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574874555] [2021-06-05 05:05:01,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:01,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:01,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:01,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:01,527 INFO L87 Difference]: Start difference. First operand 19030 states and 42297 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:01,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:01,694 INFO L93 Difference]: Finished difference Result 20409 states and 44584 transitions. [2021-06-05 05:05:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:05:01,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:05:01,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:01,722 INFO L225 Difference]: With dead ends: 20409 [2021-06-05 05:05:01,722 INFO L226 Difference]: Without dead ends: 20337 [2021-06-05 05:05:01,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:01,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20337 states. [2021-06-05 05:05:01,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20337 to 19030. [2021-06-05 05:05:01,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19030 states, 19029 states have (on average 2.216459088759262) internal successors, (42177), 19029 states have internal predecessors, (42177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42177 transitions. [2021-06-05 05:05:02,013 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42177 transitions. Word has length 46 [2021-06-05 05:05:02,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:02,014 INFO L482 AbstractCegarLoop]: Abstraction has 19030 states and 42177 transitions. [2021-06-05 05:05:02,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:02,014 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42177 transitions. [2021-06-05 05:05:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:05:02,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:02,027 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:02,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 05:05:02,239 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:02,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:02,239 INFO L82 PathProgramCache]: Analyzing trace with hash 725045157, now seen corresponding path program 31 times [2021-06-05 05:05:02,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:02,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794315932] [2021-06-05 05:05:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:02,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:02,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794315932] [2021-06-05 05:05:02,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794315932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:02,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060395456] [2021-06-05 05:05:02,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:02,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:05:02,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:02,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060395456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:02,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:02,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:05:02,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186004632] [2021-06-05 05:05:02,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:05:02,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:02,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:05:02,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:05:02,389 INFO L87 Difference]: Start difference. First operand 19030 states and 42177 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:02,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:02,582 INFO L93 Difference]: Finished difference Result 20155 states and 44063 transitions. [2021-06-05 05:05:02,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:02,583 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:05:02,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:02,613 INFO L225 Difference]: With dead ends: 20155 [2021-06-05 05:05:02,613 INFO L226 Difference]: Without dead ends: 20027 [2021-06-05 05:05:02,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:05:02,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20027 states. [2021-06-05 05:05:02,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20027 to 19078. [2021-06-05 05:05:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19078 states, 19077 states have (on average 2.210043507889081) internal successors, (42161), 19077 states have internal predecessors, (42161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19078 states to 19078 states and 42161 transitions. [2021-06-05 05:05:02,972 INFO L78 Accepts]: Start accepts. Automaton has 19078 states and 42161 transitions. Word has length 46 [2021-06-05 05:05:02,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:02,972 INFO L482 AbstractCegarLoop]: Abstraction has 19078 states and 42161 transitions. [2021-06-05 05:05:02,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:02,972 INFO L276 IsEmpty]: Start isEmpty. Operand 19078 states and 42161 transitions. [2021-06-05 05:05:02,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:05:02,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:02,989 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:03,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:03,212 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:03,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:03,213 INFO L82 PathProgramCache]: Analyzing trace with hash -876630137, now seen corresponding path program 32 times [2021-06-05 05:05:03,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:03,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431799118] [2021-06-05 05:05:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:05:03,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:03,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431799118] [2021-06-05 05:05:03,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431799118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:03,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878342348] [2021-06-05 05:05:03,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:03,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:03,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:03,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:05:03,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:05:03,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878342348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:03,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:03,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:05:03,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227111622] [2021-06-05 05:05:03,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:05:03,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:03,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:05:03,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:05:03,381 INFO L87 Difference]: Start difference. First operand 19078 states and 42161 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:03,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:03,563 INFO L93 Difference]: Finished difference Result 20680 states and 45191 transitions. [2021-06-05 05:05:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:05:03,564 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:05:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:03,592 INFO L225 Difference]: With dead ends: 20680 [2021-06-05 05:05:03,592 INFO L226 Difference]: Without dead ends: 20680 [2021-06-05 05:05:03,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:05:03,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20680 states. [2021-06-05 05:05:03,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20680 to 17730. [2021-06-05 05:05:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17730 states, 17729 states have (on average 2.2009701618816626) internal successors, (39021), 17729 states have internal predecessors, (39021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:03,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17730 states to 17730 states and 39021 transitions. [2021-06-05 05:05:03,884 INFO L78 Accepts]: Start accepts. Automaton has 17730 states and 39021 transitions. Word has length 46 [2021-06-05 05:05:03,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:03,884 INFO L482 AbstractCegarLoop]: Abstraction has 17730 states and 39021 transitions. [2021-06-05 05:05:03,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:03,885 INFO L276 IsEmpty]: Start isEmpty. Operand 17730 states and 39021 transitions. [2021-06-05 05:05:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:05:03,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:03,897 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:04,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 05:05:04,097 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:04,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:04,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1293149669, now seen corresponding path program 33 times [2021-06-05 05:05:04,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:04,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852484900] [2021-06-05 05:05:04,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:05:04,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:04,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852484900] [2021-06-05 05:05:04,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852484900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:04,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283598881] [2021-06-05 05:05:04,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:04,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:05:04,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:04,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:05:04,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:05:04,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283598881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:04,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:04,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:04,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394060381] [2021-06-05 05:05:04,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:04,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:04,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:04,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:04,268 INFO L87 Difference]: Start difference. First operand 17730 states and 39021 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:04,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:04,417 INFO L93 Difference]: Finished difference Result 19104 states and 41588 transitions. [2021-06-05 05:05:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:05:04,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:05:04,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:04,436 INFO L225 Difference]: With dead ends: 19104 [2021-06-05 05:05:04,436 INFO L226 Difference]: Without dead ends: 19104 [2021-06-05 05:05:04,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:04,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19104 states. [2021-06-05 05:05:04,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19104 to 17742. [2021-06-05 05:05:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17742 states, 17741 states have (on average 2.200834225804633) internal successors, (39045), 17741 states have internal predecessors, (39045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:04,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17742 states to 17742 states and 39045 transitions. [2021-06-05 05:05:04,667 INFO L78 Accepts]: Start accepts. Automaton has 17742 states and 39045 transitions. Word has length 46 [2021-06-05 05:05:04,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:04,668 INFO L482 AbstractCegarLoop]: Abstraction has 17742 states and 39045 transitions. [2021-06-05 05:05:04,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:04,668 INFO L276 IsEmpty]: Start isEmpty. Operand 17742 states and 39045 transitions. [2021-06-05 05:05:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:05:04,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:04,680 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:04,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:04,881 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:04,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:04,881 INFO L82 PathProgramCache]: Analyzing trace with hash -731848889, now seen corresponding path program 34 times [2021-06-05 05:05:04,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:04,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941642335] [2021-06-05 05:05:04,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:04,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:04,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941642335] [2021-06-05 05:05:04,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941642335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:04,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498349149] [2021-06-05 05:05:04,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:04,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:04,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:04,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:05:04,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:05,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498349149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:05,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:05,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:05:05,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887797125] [2021-06-05 05:05:05,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:05:05,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:05,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:05:05,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:05:05,025 INFO L87 Difference]: Start difference. First operand 17742 states and 39045 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:05,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:05,175 INFO L93 Difference]: Finished difference Result 21829 states and 47682 transitions. [2021-06-05 05:05:05,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:05:05,176 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:05:05,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:05,207 INFO L225 Difference]: With dead ends: 21829 [2021-06-05 05:05:05,208 INFO L226 Difference]: Without dead ends: 21829 [2021-06-05 05:05:05,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:05:05,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21829 states. [2021-06-05 05:05:05,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21829 to 20406. [2021-06-05 05:05:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20406 states, 20405 states have (on average 2.2182308257779955) internal successors, (45263), 20405 states have internal predecessors, (45263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20406 states to 20406 states and 45263 transitions. [2021-06-05 05:05:05,520 INFO L78 Accepts]: Start accepts. Automaton has 20406 states and 45263 transitions. Word has length 46 [2021-06-05 05:05:05,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:05,521 INFO L482 AbstractCegarLoop]: Abstraction has 20406 states and 45263 transitions. [2021-06-05 05:05:05,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:05,521 INFO L276 IsEmpty]: Start isEmpty. Operand 20406 states and 45263 transitions. [2021-06-05 05:05:05,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:05:05,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:05,533 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:05,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 05:05:05,734 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:05,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:05,734 INFO L82 PathProgramCache]: Analyzing trace with hash 438207111, now seen corresponding path program 35 times [2021-06-05 05:05:05,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:05,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186626695] [2021-06-05 05:05:05,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:05,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:05,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186626695] [2021-06-05 05:05:05,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186626695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:05,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861591684] [2021-06-05 05:05:05,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:05,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:05:05,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:05,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:05:05,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:05,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861591684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:05,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:05,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:05:05,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865493560] [2021-06-05 05:05:05,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:05:05,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:05,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:05:05,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:05:05,886 INFO L87 Difference]: Start difference. First operand 20406 states and 45263 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:06,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:06,019 INFO L93 Difference]: Finished difference Result 21712 states and 47427 transitions. [2021-06-05 05:05:06,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:05:06,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:05:06,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:06,042 INFO L225 Difference]: With dead ends: 21712 [2021-06-05 05:05:06,043 INFO L226 Difference]: Without dead ends: 21704 [2021-06-05 05:05:06,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:05:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21704 states. [2021-06-05 05:05:06,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21704 to 20402. [2021-06-05 05:05:06,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20402 states, 20401 states have (on average 2.21768540757806) internal successors, (45243), 20401 states have internal predecessors, (45243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:06,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45243 transitions. [2021-06-05 05:05:06,308 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45243 transitions. Word has length 46 [2021-06-05 05:05:06,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:06,309 INFO L482 AbstractCegarLoop]: Abstraction has 20402 states and 45243 transitions. [2021-06-05 05:05:06,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:06,309 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45243 transitions. [2021-06-05 05:05:06,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:05:06,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:06,321 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:06,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:06,522 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:06,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:06,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2098532755, now seen corresponding path program 36 times [2021-06-05 05:05:06,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:06,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223261690] [2021-06-05 05:05:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:06,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:06,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223261690] [2021-06-05 05:05:06,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223261690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:06,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51795841] [2021-06-05 05:05:06,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:06,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:05:06,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:06,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:05:06,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:05:06,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51795841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:06,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:06,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 05:05:06,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170582861] [2021-06-05 05:05:06,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:05:06,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:06,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:05:06,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:06,694 INFO L87 Difference]: Start difference. First operand 20402 states and 45243 transitions. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:07,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:07,180 INFO L93 Difference]: Finished difference Result 28400 states and 61628 transitions. [2021-06-05 05:05:07,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:05:07,180 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:05:07,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:07,212 INFO L225 Difference]: With dead ends: 28400 [2021-06-05 05:05:07,212 INFO L226 Difference]: Without dead ends: 28376 [2021-06-05 05:05:07,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:05:07,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28376 states. [2021-06-05 05:05:07,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28376 to 20402. [2021-06-05 05:05:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20402 states, 20401 states have (on average 2.212979755894319) internal successors, (45147), 20401 states have internal predecessors, (45147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:07,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45147 transitions. [2021-06-05 05:05:07,528 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45147 transitions. Word has length 46 [2021-06-05 05:05:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:07,528 INFO L482 AbstractCegarLoop]: Abstraction has 20402 states and 45147 transitions. [2021-06-05 05:05:07,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45147 transitions. [2021-06-05 05:05:07,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:07,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:07,545 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:07,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 05:05:07,746 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:07,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:07,746 INFO L82 PathProgramCache]: Analyzing trace with hash -676350810, now seen corresponding path program 37 times [2021-06-05 05:05:07,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:07,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907970466] [2021-06-05 05:05:07,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:07,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:07,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907970466] [2021-06-05 05:05:07,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907970466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:07,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888292984] [2021-06-05 05:05:07,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:07,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:07,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:07,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888292984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:07,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:07,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:05:07,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630715846] [2021-06-05 05:05:07,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:05:07,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:07,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:05:07,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:05:07,934 INFO L87 Difference]: Start difference. First operand 20402 states and 45147 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:08,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:08,141 INFO L93 Difference]: Finished difference Result 25889 states and 56595 transitions. [2021-06-05 05:05:08,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:08,141 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:08,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:08,169 INFO L225 Difference]: With dead ends: 25889 [2021-06-05 05:05:08,169 INFO L226 Difference]: Without dead ends: 25889 [2021-06-05 05:05:08,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:08,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25889 states. [2021-06-05 05:05:08,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25889 to 21836. [2021-06-05 05:05:08,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21836 states, 21835 states have (on average 2.216762079230593) internal successors, (48403), 21835 states have internal predecessors, (48403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21836 states to 21836 states and 48403 transitions. [2021-06-05 05:05:08,424 INFO L78 Accepts]: Start accepts. Automaton has 21836 states and 48403 transitions. Word has length 56 [2021-06-05 05:05:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:08,424 INFO L482 AbstractCegarLoop]: Abstraction has 21836 states and 48403 transitions. [2021-06-05 05:05:08,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 21836 states and 48403 transitions. [2021-06-05 05:05:08,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:08,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:08,443 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:08,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 05:05:08,644 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:08,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:08,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1178558949, now seen corresponding path program 38 times [2021-06-05 05:05:08,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:08,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459555750] [2021-06-05 05:05:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:08,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:08,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459555750] [2021-06-05 05:05:08,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459555750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:08,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138106115] [2021-06-05 05:05:08,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:08,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:08,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:08,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:08,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:08,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138106115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:08,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:08,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:05:08,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269707968] [2021-06-05 05:05:08,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:05:08,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:08,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:05:08,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:05:08,822 INFO L87 Difference]: Start difference. First operand 21836 states and 48403 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:09,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:09,068 INFO L93 Difference]: Finished difference Result 31481 states and 69778 transitions. [2021-06-05 05:05:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:05:09,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:09,101 INFO L225 Difference]: With dead ends: 31481 [2021-06-05 05:05:09,102 INFO L226 Difference]: Without dead ends: 31323 [2021-06-05 05:05:09,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:09,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31323 states. [2021-06-05 05:05:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31323 to 30212. [2021-06-05 05:05:09,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30212 states, 30211 states have (on average 2.2320015888252622) internal successors, (67431), 30211 states have internal predecessors, (67431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30212 states to 30212 states and 67431 transitions. [2021-06-05 05:05:09,501 INFO L78 Accepts]: Start accepts. Automaton has 30212 states and 67431 transitions. Word has length 56 [2021-06-05 05:05:09,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:09,501 INFO L482 AbstractCegarLoop]: Abstraction has 30212 states and 67431 transitions. [2021-06-05 05:05:09,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand 30212 states and 67431 transitions. [2021-06-05 05:05:09,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:09,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:09,524 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:09,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:09,725 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:09,725 INFO L82 PathProgramCache]: Analyzing trace with hash 153461775, now seen corresponding path program 39 times [2021-06-05 05:05:09,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:09,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309107010] [2021-06-05 05:05:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:09,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:09,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309107010] [2021-06-05 05:05:09,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309107010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:09,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478816934] [2021-06-05 05:05:09,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:09,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:05:09,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:09,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:09,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:09,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478816934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:09,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:09,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:09,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866030473] [2021-06-05 05:05:09,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:09,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:09,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:09,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:09,888 INFO L87 Difference]: Start difference. First operand 30212 states and 67431 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:10,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:10,063 INFO L93 Difference]: Finished difference Result 31139 states and 68850 transitions. [2021-06-05 05:05:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:10,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:10,097 INFO L225 Difference]: With dead ends: 31139 [2021-06-05 05:05:10,097 INFO L226 Difference]: Without dead ends: 31139 [2021-06-05 05:05:10,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:10,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31139 states. [2021-06-05 05:05:10,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31139 to 28244. [2021-06-05 05:05:10,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28244 states, 28243 states have (on average 2.2232411571008743) internal successors, (62791), 28243 states have internal predecessors, (62791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28244 states to 28244 states and 62791 transitions. [2021-06-05 05:05:10,434 INFO L78 Accepts]: Start accepts. Automaton has 28244 states and 62791 transitions. Word has length 56 [2021-06-05 05:05:10,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:10,434 INFO L482 AbstractCegarLoop]: Abstraction has 28244 states and 62791 transitions. [2021-06-05 05:05:10,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:10,434 INFO L276 IsEmpty]: Start isEmpty. Operand 28244 states and 62791 transitions. [2021-06-05 05:05:10,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:10,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:10,454 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:10,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 05:05:10,654 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:10,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:10,655 INFO L82 PathProgramCache]: Analyzing trace with hash 359936614, now seen corresponding path program 40 times [2021-06-05 05:05:10,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:10,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960631220] [2021-06-05 05:05:10,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:10,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:10,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960631220] [2021-06-05 05:05:10,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960631220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:10,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125234635] [2021-06-05 05:05:10,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:10,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:10,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:10,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:10,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:10,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125234635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:10,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:10,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:10,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549004536] [2021-06-05 05:05:10,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:10,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:10,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:10,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:10,803 INFO L87 Difference]: Start difference. First operand 28244 states and 62791 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:10,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:10,946 INFO L93 Difference]: Finished difference Result 29356 states and 64669 transitions. [2021-06-05 05:05:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:10,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:10,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:10,975 INFO L225 Difference]: With dead ends: 29356 [2021-06-05 05:05:10,975 INFO L226 Difference]: Without dead ends: 29352 [2021-06-05 05:05:10,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:10,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29352 states. [2021-06-05 05:05:11,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29352 to 27360. [2021-06-05 05:05:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27360 states, 27359 states have (on average 2.2246061625059395) internal successors, (60863), 27359 states have internal predecessors, (60863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:11,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27360 states to 27360 states and 60863 transitions. [2021-06-05 05:05:11,311 INFO L78 Accepts]: Start accepts. Automaton has 27360 states and 60863 transitions. Word has length 56 [2021-06-05 05:05:11,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:11,311 INFO L482 AbstractCegarLoop]: Abstraction has 27360 states and 60863 transitions. [2021-06-05 05:05:11,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:11,311 INFO L276 IsEmpty]: Start isEmpty. Operand 27360 states and 60863 transitions. [2021-06-05 05:05:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:11,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:11,330 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:11,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:11,530 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:11,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1412824282, now seen corresponding path program 41 times [2021-06-05 05:05:11,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:11,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192171546] [2021-06-05 05:05:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:11,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:11,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192171546] [2021-06-05 05:05:11,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192171546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:11,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371458424] [2021-06-05 05:05:11,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:11,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:05:11,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:11,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:11,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:11,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371458424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:11,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:11,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:11,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316885356] [2021-06-05 05:05:11,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:11,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:11,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:11,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:11,684 INFO L87 Difference]: Start difference. First operand 27360 states and 60863 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:11,840 INFO L93 Difference]: Finished difference Result 35236 states and 77241 transitions. [2021-06-05 05:05:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:11,840 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:11,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:11,876 INFO L225 Difference]: With dead ends: 35236 [2021-06-05 05:05:11,876 INFO L226 Difference]: Without dead ends: 35236 [2021-06-05 05:05:11,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:11,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35236 states. [2021-06-05 05:05:12,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35236 to 31608. [2021-06-05 05:05:12,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31608 states, 31607 states have (on average 2.2330180023412534) internal successors, (70579), 31607 states have internal predecessors, (70579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31608 states to 31608 states and 70579 transitions. [2021-06-05 05:05:12,350 INFO L78 Accepts]: Start accepts. Automaton has 31608 states and 70579 transitions. Word has length 56 [2021-06-05 05:05:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:12,350 INFO L482 AbstractCegarLoop]: Abstraction has 31608 states and 70579 transitions. [2021-06-05 05:05:12,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:12,350 INFO L276 IsEmpty]: Start isEmpty. Operand 31608 states and 70579 transitions. [2021-06-05 05:05:12,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:12,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:12,372 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:12,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:12,572 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:12,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:12,573 INFO L82 PathProgramCache]: Analyzing trace with hash -417869413, now seen corresponding path program 42 times [2021-06-05 05:05:12,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:12,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550675103] [2021-06-05 05:05:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:12,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:12,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550675103] [2021-06-05 05:05:12,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550675103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:12,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181287122] [2021-06-05 05:05:12,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:12,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:05:12,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:12,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:12,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:12,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181287122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:12,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:12,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:12,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510727802] [2021-06-05 05:05:12,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:12,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:12,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:12,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:12,718 INFO L87 Difference]: Start difference. First operand 31608 states and 70579 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:12,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:12,887 INFO L93 Difference]: Finished difference Result 34730 states and 77163 transitions. [2021-06-05 05:05:12,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:12,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:12,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:12,926 INFO L225 Difference]: With dead ends: 34730 [2021-06-05 05:05:12,927 INFO L226 Difference]: Without dead ends: 34724 [2021-06-05 05:05:12,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34724 states. [2021-06-05 05:05:13,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34724 to 33620. [2021-06-05 05:05:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33620 states, 33619 states have (on average 2.240013087837235) internal successors, (75307), 33619 states have internal predecessors, (75307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:13,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33620 states to 33620 states and 75307 transitions. [2021-06-05 05:05:13,334 INFO L78 Accepts]: Start accepts. Automaton has 33620 states and 75307 transitions. Word has length 56 [2021-06-05 05:05:13,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:13,334 INFO L482 AbstractCegarLoop]: Abstraction has 33620 states and 75307 transitions. [2021-06-05 05:05:13,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:13,334 INFO L276 IsEmpty]: Start isEmpty. Operand 33620 states and 75307 transitions. [2021-06-05 05:05:13,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:13,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:13,354 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:13,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 05:05:13,555 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:13,555 INFO L82 PathProgramCache]: Analyzing trace with hash -113143793, now seen corresponding path program 43 times [2021-06-05 05:05:13,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:13,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859987372] [2021-06-05 05:05:13,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:13,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:13,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859987372] [2021-06-05 05:05:13,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859987372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:13,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946845436] [2021-06-05 05:05:13,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:13,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:13,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:13,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946845436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:13,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:13,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:13,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791827698] [2021-06-05 05:05:13,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:13,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:13,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:13,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:13,704 INFO L87 Difference]: Start difference. First operand 33620 states and 75307 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:13,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:13,864 INFO L93 Difference]: Finished difference Result 35642 states and 78991 transitions. [2021-06-05 05:05:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:13,865 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:13,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:13,903 INFO L225 Difference]: With dead ends: 35642 [2021-06-05 05:05:13,904 INFO L226 Difference]: Without dead ends: 35640 [2021-06-05 05:05:13,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:13,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35640 states. [2021-06-05 05:05:14,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35640 to 33704. [2021-06-05 05:05:14,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33704 states, 33703 states have (on average 2.237159896745097) internal successors, (75399), 33703 states have internal predecessors, (75399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33704 states to 33704 states and 75399 transitions. [2021-06-05 05:05:14,299 INFO L78 Accepts]: Start accepts. Automaton has 33704 states and 75399 transitions. Word has length 56 [2021-06-05 05:05:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:14,299 INFO L482 AbstractCegarLoop]: Abstraction has 33704 states and 75399 transitions. [2021-06-05 05:05:14,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 33704 states and 75399 transitions. [2021-06-05 05:05:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:14,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:14,319 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:14,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:14,520 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:14,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:14,520 INFO L82 PathProgramCache]: Analyzing trace with hash 93331046, now seen corresponding path program 44 times [2021-06-05 05:05:14,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:14,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060812536] [2021-06-05 05:05:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:14,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:14,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060812536] [2021-06-05 05:05:14,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060812536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:14,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093374486] [2021-06-05 05:05:14,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:14,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:14,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:14,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:14,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:14,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093374486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:14,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:14,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:14,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695900687] [2021-06-05 05:05:14,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:14,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:14,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:14,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:14,682 INFO L87 Difference]: Start difference. First operand 33704 states and 75399 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:14,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:14,855 INFO L93 Difference]: Finished difference Result 35791 states and 78899 transitions. [2021-06-05 05:05:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:14,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:14,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:14,895 INFO L225 Difference]: With dead ends: 35791 [2021-06-05 05:05:14,895 INFO L226 Difference]: Without dead ends: 35723 [2021-06-05 05:05:14,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:14,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35723 states. [2021-06-05 05:05:15,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35723 to 33624. [2021-06-05 05:05:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33624 states, 33623 states have (on average 2.2343931237545727) internal successors, (75127), 33623 states have internal predecessors, (75127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33624 states to 33624 states and 75127 transitions. [2021-06-05 05:05:15,279 INFO L78 Accepts]: Start accepts. Automaton has 33624 states and 75127 transitions. Word has length 56 [2021-06-05 05:05:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:15,279 INFO L482 AbstractCegarLoop]: Abstraction has 33624 states and 75127 transitions. [2021-06-05 05:05:15,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 33624 states and 75127 transitions. [2021-06-05 05:05:15,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:15,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:15,299 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:15,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 05:05:15,500 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:15,500 INFO L82 PathProgramCache]: Analyzing trace with hash 277060133, now seen corresponding path program 45 times [2021-06-05 05:05:15,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:15,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162241623] [2021-06-05 05:05:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:15,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:15,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162241623] [2021-06-05 05:05:15,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162241623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:15,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869349029] [2021-06-05 05:05:15,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:15,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:05:15,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:15,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:15,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:15,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869349029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:15,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:15,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:05:15,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799937608] [2021-06-05 05:05:15,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:05:15,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:15,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:05:15,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:05:15,660 INFO L87 Difference]: Start difference. First operand 33624 states and 75127 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:15,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:15,871 INFO L93 Difference]: Finished difference Result 35258 states and 78007 transitions. [2021-06-05 05:05:15,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:15,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:15,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:15,922 INFO L225 Difference]: With dead ends: 35258 [2021-06-05 05:05:15,923 INFO L226 Difference]: Without dead ends: 35256 [2021-06-05 05:05:15,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:05:15,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35256 states. [2021-06-05 05:05:16,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35256 to 33208. [2021-06-05 05:05:16,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 33207 states have (on average 2.2308248260908843) internal successors, (74079), 33207 states have internal predecessors, (74079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:16,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74079 transitions. [2021-06-05 05:05:16,327 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74079 transitions. Word has length 56 [2021-06-05 05:05:16,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:16,328 INFO L482 AbstractCegarLoop]: Abstraction has 33208 states and 74079 transitions. [2021-06-05 05:05:16,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:16,328 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74079 transitions. [2021-06-05 05:05:16,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:16,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:16,349 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:16,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 05:05:16,549 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:16,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:16,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1851558476, now seen corresponding path program 46 times [2021-06-05 05:05:16,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:16,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478973820] [2021-06-05 05:05:16,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:16,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:16,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478973820] [2021-06-05 05:05:16,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478973820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:16,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952249095] [2021-06-05 05:05:16,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:16,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:16,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:16,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:16,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:16,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952249095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:16,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:16,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:05:16,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315406288] [2021-06-05 05:05:16,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:05:16,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:16,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:05:16,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:05:16,722 INFO L87 Difference]: Start difference. First operand 33208 states and 74079 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:17,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:17,123 INFO L93 Difference]: Finished difference Result 34889 states and 76950 transitions. [2021-06-05 05:05:17,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:05:17,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:17,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:17,162 INFO L225 Difference]: With dead ends: 34889 [2021-06-05 05:05:17,162 INFO L226 Difference]: Without dead ends: 34865 [2021-06-05 05:05:17,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:05:17,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34865 states. [2021-06-05 05:05:17,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34865 to 33208. [2021-06-05 05:05:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 33207 states have (on average 2.2297407173186374) internal successors, (74043), 33207 states have internal predecessors, (74043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:17,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74043 transitions. [2021-06-05 05:05:17,807 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74043 transitions. Word has length 56 [2021-06-05 05:05:17,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:17,808 INFO L482 AbstractCegarLoop]: Abstraction has 33208 states and 74043 transitions. [2021-06-05 05:05:17,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:17,808 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74043 transitions. [2021-06-05 05:05:17,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:17,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:17,828 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:18,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 05:05:18,029 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:18,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:18,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1633200633, now seen corresponding path program 47 times [2021-06-05 05:05:18,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:18,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212344854] [2021-06-05 05:05:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:05:18,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:18,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212344854] [2021-06-05 05:05:18,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212344854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:18,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222075938] [2021-06-05 05:05:18,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:18,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:05:18,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:18,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:18,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:05:18,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222075938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:18,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:18,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:18,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739065735] [2021-06-05 05:05:18,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:18,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:18,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:18,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:18,174 INFO L87 Difference]: Start difference. First operand 33208 states and 74043 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:18,336 INFO L93 Difference]: Finished difference Result 35848 states and 79532 transitions. [2021-06-05 05:05:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:05:18,336 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:18,377 INFO L225 Difference]: With dead ends: 35848 [2021-06-05 05:05:18,377 INFO L226 Difference]: Without dead ends: 35812 [2021-06-05 05:05:18,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:18,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35812 states. [2021-06-05 05:05:18,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35812 to 32944. [2021-06-05 05:05:18,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32944 states, 32943 states have (on average 2.231581823149076) internal successors, (73515), 32943 states have internal predecessors, (73515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:18,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32944 states to 32944 states and 73515 transitions. [2021-06-05 05:05:18,863 INFO L78 Accepts]: Start accepts. Automaton has 32944 states and 73515 transitions. Word has length 56 [2021-06-05 05:05:18,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:18,863 INFO L482 AbstractCegarLoop]: Abstraction has 32944 states and 73515 transitions. [2021-06-05 05:05:18,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:18,863 INFO L276 IsEmpty]: Start isEmpty. Operand 32944 states and 73515 transitions. [2021-06-05 05:05:18,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:18,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:18,985 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:19,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 05:05:19,185 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:19,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:19,186 INFO L82 PathProgramCache]: Analyzing trace with hash -916831962, now seen corresponding path program 48 times [2021-06-05 05:05:19,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:19,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541215727] [2021-06-05 05:05:19,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:19,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:19,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541215727] [2021-06-05 05:05:19,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541215727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:19,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063764281] [2021-06-05 05:05:19,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:19,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:05:19,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:19,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:19,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:19,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063764281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:19,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:19,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:19,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918317935] [2021-06-05 05:05:19,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:19,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:19,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:19,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:19,358 INFO L87 Difference]: Start difference. First operand 32944 states and 73515 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:19,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:19,575 INFO L93 Difference]: Finished difference Result 40718 states and 89870 transitions. [2021-06-05 05:05:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:19,576 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:19,636 INFO L225 Difference]: With dead ends: 40718 [2021-06-05 05:05:19,636 INFO L226 Difference]: Without dead ends: 40718 [2021-06-05 05:05:19,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:19,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40718 states. [2021-06-05 05:05:20,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40718 to 37152. [2021-06-05 05:05:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37152 states, 37151 states have (on average 2.2417431563080403) internal successors, (83283), 37151 states have internal predecessors, (83283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37152 states to 37152 states and 83283 transitions. [2021-06-05 05:05:20,360 INFO L78 Accepts]: Start accepts. Automaton has 37152 states and 83283 transitions. Word has length 56 [2021-06-05 05:05:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:20,360 INFO L482 AbstractCegarLoop]: Abstraction has 37152 states and 83283 transitions. [2021-06-05 05:05:20,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:20,360 INFO L276 IsEmpty]: Start isEmpty. Operand 37152 states and 83283 transitions. [2021-06-05 05:05:20,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:20,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:20,385 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:20,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:20,608 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:20,608 INFO L82 PathProgramCache]: Analyzing trace with hash 78122907, now seen corresponding path program 49 times [2021-06-05 05:05:20,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:20,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480987771] [2021-06-05 05:05:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:20,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:20,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480987771] [2021-06-05 05:05:20,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480987771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:20,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684714807] [2021-06-05 05:05:20,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:20,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:20,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:20,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684714807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:20,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:20,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:20,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722706974] [2021-06-05 05:05:20,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:20,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:20,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:20,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:20,769 INFO L87 Difference]: Start difference. First operand 37152 states and 83283 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:20,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:20,956 INFO L93 Difference]: Finished difference Result 40524 states and 90274 transitions. [2021-06-05 05:05:20,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:20,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:20,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:20,999 INFO L225 Difference]: With dead ends: 40524 [2021-06-05 05:05:21,000 INFO L226 Difference]: Without dead ends: 40488 [2021-06-05 05:05:21,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40488 states. [2021-06-05 05:05:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40488 to 36712. [2021-06-05 05:05:21,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36712 states, 36711 states have (on average 2.242025550924791) internal successors, (82307), 36711 states have internal predecessors, (82307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:21,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36712 states to 36712 states and 82307 transitions. [2021-06-05 05:05:21,673 INFO L78 Accepts]: Start accepts. Automaton has 36712 states and 82307 transitions. Word has length 56 [2021-06-05 05:05:21,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:21,674 INFO L482 AbstractCegarLoop]: Abstraction has 36712 states and 82307 transitions. [2021-06-05 05:05:21,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:21,674 INFO L276 IsEmpty]: Start isEmpty. Operand 36712 states and 82307 transitions. [2021-06-05 05:05:21,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:21,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:21,692 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:21,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:21,897 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:21,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:21,897 INFO L82 PathProgramCache]: Analyzing trace with hash 382848527, now seen corresponding path program 50 times [2021-06-05 05:05:21,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:21,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624433932] [2021-06-05 05:05:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:21,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:21,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624433932] [2021-06-05 05:05:21,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624433932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:21,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581628402] [2021-06-05 05:05:21,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:21,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:21,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:21,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:21,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:22,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581628402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:22,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:22,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:22,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706658173] [2021-06-05 05:05:22,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:22,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:22,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:22,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:22,064 INFO L87 Difference]: Start difference. First operand 36712 states and 82307 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:22,217 INFO L93 Difference]: Finished difference Result 39280 states and 87158 transitions. [2021-06-05 05:05:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:22,218 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:22,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:22,259 INFO L225 Difference]: With dead ends: 39280 [2021-06-05 05:05:22,259 INFO L226 Difference]: Without dead ends: 39278 [2021-06-05 05:05:22,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:22,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39278 states. [2021-06-05 05:05:22,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39278 to 36836. [2021-06-05 05:05:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36836 states, 36835 states have (on average 2.2415365820551107) internal successors, (82567), 36835 states have internal predecessors, (82567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36836 states to 36836 states and 82567 transitions. [2021-06-05 05:05:22,903 INFO L78 Accepts]: Start accepts. Automaton has 36836 states and 82567 transitions. Word has length 56 [2021-06-05 05:05:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:22,903 INFO L482 AbstractCegarLoop]: Abstraction has 36836 states and 82567 transitions. [2021-06-05 05:05:22,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:22,904 INFO L276 IsEmpty]: Start isEmpty. Operand 36836 states and 82567 transitions. [2021-06-05 05:05:22,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:22,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:22,924 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:23,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:23,125 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:23,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:23,125 INFO L82 PathProgramCache]: Analyzing trace with hash 589323366, now seen corresponding path program 51 times [2021-06-05 05:05:23,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:23,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245989183] [2021-06-05 05:05:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:23,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:23,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245989183] [2021-06-05 05:05:23,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245989183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:23,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778540049] [2021-06-05 05:05:23,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:23,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:05:23,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:23,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:05:23,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 05:05:23,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778540049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:23,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:23,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 05:05:23,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572496795] [2021-06-05 05:05:23,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:05:23,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:23,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:05:23,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:05:23,312 INFO L87 Difference]: Start difference. First operand 36836 states and 82567 transitions. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:24,207 INFO L93 Difference]: Finished difference Result 65704 states and 142418 transitions. [2021-06-05 05:05:24,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:05:24,207 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:24,279 INFO L225 Difference]: With dead ends: 65704 [2021-06-05 05:05:24,279 INFO L226 Difference]: Without dead ends: 65560 [2021-06-05 05:05:24,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 412.2ms TimeCoverageRelationStatistics Valid=437, Invalid=2755, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:05:24,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65560 states. [2021-06-05 05:05:25,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65560 to 50470. [2021-06-05 05:05:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50470 states, 50469 states have (on average 2.2044225167924867) internal successors, (111255), 50469 states have internal predecessors, (111255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50470 states to 50470 states and 111255 transitions. [2021-06-05 05:05:25,263 INFO L78 Accepts]: Start accepts. Automaton has 50470 states and 111255 transitions. Word has length 56 [2021-06-05 05:05:25,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:25,263 INFO L482 AbstractCegarLoop]: Abstraction has 50470 states and 111255 transitions. [2021-06-05 05:05:25,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 50470 states and 111255 transitions. [2021-06-05 05:05:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:25,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:25,291 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:25,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 05:05:25,491 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:25,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:25,492 INFO L82 PathProgramCache]: Analyzing trace with hash 773052453, now seen corresponding path program 52 times [2021-06-05 05:05:25,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:25,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184974217] [2021-06-05 05:05:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:25,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:25,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184974217] [2021-06-05 05:05:25,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184974217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:25,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529524188] [2021-06-05 05:05:25,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:25,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:25,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:25,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:25,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:25,795 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 05:05:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:25,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529524188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:25,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:25,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:05:25,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814992776] [2021-06-05 05:05:25,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:05:25,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:25,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:05:25,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:05:25,839 INFO L87 Difference]: Start difference. First operand 50470 states and 111255 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:26,070 INFO L93 Difference]: Finished difference Result 57450 states and 125218 transitions. [2021-06-05 05:05:26,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:05:26,070 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:26,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:26,136 INFO L225 Difference]: With dead ends: 57450 [2021-06-05 05:05:26,136 INFO L226 Difference]: Without dead ends: 57432 [2021-06-05 05:05:26,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:05:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57432 states. [2021-06-05 05:05:26,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57432 to 50730. [2021-06-05 05:05:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50730 states, 50729 states have (on average 2.2019554889708055) internal successors, (111703), 50729 states have internal predecessors, (111703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50730 states to 50730 states and 111703 transitions. [2021-06-05 05:05:27,064 INFO L78 Accepts]: Start accepts. Automaton has 50730 states and 111703 transitions. Word has length 56 [2021-06-05 05:05:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:27,065 INFO L482 AbstractCegarLoop]: Abstraction has 50730 states and 111703 transitions. [2021-06-05 05:05:27,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 50730 states and 111703 transitions. [2021-06-05 05:05:27,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:27,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:27,094 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:27,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:27,295 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:27,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2069049913, now seen corresponding path program 53 times [2021-06-05 05:05:27,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:27,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133716298] [2021-06-05 05:05:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:27,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:27,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133716298] [2021-06-05 05:05:27,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133716298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:27,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104187360] [2021-06-05 05:05:27,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:27,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:05:27,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:27,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:27,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:27,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104187360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:27,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:27,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:05:27,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731531422] [2021-06-05 05:05:27,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:05:27,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:27,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:05:27,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:05:27,468 INFO L87 Difference]: Start difference. First operand 50730 states and 111703 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:27,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:27,741 INFO L93 Difference]: Finished difference Result 53406 states and 116710 transitions. [2021-06-05 05:05:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:27,742 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:27,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:27,808 INFO L225 Difference]: With dead ends: 53406 [2021-06-05 05:05:27,808 INFO L226 Difference]: Without dead ends: 53388 [2021-06-05 05:05:27,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:27,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53388 states. [2021-06-05 05:05:28,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53388 to 45578. [2021-06-05 05:05:28,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45578 states, 45577 states have (on average 2.197402198477302) internal successors, (100151), 45577 states have internal predecessors, (100151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45578 states to 45578 states and 100151 transitions. [2021-06-05 05:05:28,820 INFO L78 Accepts]: Start accepts. Automaton has 45578 states and 100151 transitions. Word has length 56 [2021-06-05 05:05:28,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:28,820 INFO L482 AbstractCegarLoop]: Abstraction has 45578 states and 100151 transitions. [2021-06-05 05:05:28,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:28,821 INFO L276 IsEmpty]: Start isEmpty. Operand 45578 states and 100151 transitions. [2021-06-05 05:05:28,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:28,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:28,842 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:29,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 05:05:29,043 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:29,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:29,043 INFO L82 PathProgramCache]: Analyzing trace with hash -361343013, now seen corresponding path program 54 times [2021-06-05 05:05:29,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:29,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841168764] [2021-06-05 05:05:29,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 05:05:29,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:29,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841168764] [2021-06-05 05:05:29,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841168764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:29,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963221826] [2021-06-05 05:05:29,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:29,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:05:29,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:29,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:29,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 05:05:29,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963221826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:29,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:29,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:05:29,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544139553] [2021-06-05 05:05:29,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:05:29,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:29,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:05:29,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:05:29,188 INFO L87 Difference]: Start difference. First operand 45578 states and 100151 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:29,398 INFO L93 Difference]: Finished difference Result 49711 states and 108806 transitions. [2021-06-05 05:05:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:29,399 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:29,457 INFO L225 Difference]: With dead ends: 49711 [2021-06-05 05:05:29,457 INFO L226 Difference]: Without dead ends: 49645 [2021-06-05 05:05:29,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:05:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49645 states. [2021-06-05 05:05:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49645 to 48590. [2021-06-05 05:05:30,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48590 states, 48589 states have (on average 2.2018769680380332) internal successors, (106987), 48589 states have internal predecessors, (106987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:30,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48590 states to 48590 states and 106987 transitions. [2021-06-05 05:05:30,142 INFO L78 Accepts]: Start accepts. Automaton has 48590 states and 106987 transitions. Word has length 56 [2021-06-05 05:05:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:30,142 INFO L482 AbstractCegarLoop]: Abstraction has 48590 states and 106987 transitions. [2021-06-05 05:05:30,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:30,142 INFO L276 IsEmpty]: Start isEmpty. Operand 48590 states and 106987 transitions. [2021-06-05 05:05:30,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:30,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:30,162 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:30,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:30,362 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:30,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:30,363 INFO L82 PathProgramCache]: Analyzing trace with hash -378550939, now seen corresponding path program 55 times [2021-06-05 05:05:30,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:30,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302715664] [2021-06-05 05:05:30,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:05:30,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:30,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302715664] [2021-06-05 05:05:30,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302715664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:30,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44708373] [2021-06-05 05:05:30,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:30,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:30,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:05:30,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44708373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:30,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:30,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:30,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990995380] [2021-06-05 05:05:30,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:30,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:30,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:30,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:30,514 INFO L87 Difference]: Start difference. First operand 48590 states and 106987 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:30,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:30,938 INFO L93 Difference]: Finished difference Result 51903 states and 113860 transitions. [2021-06-05 05:05:30,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:05:30,939 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:30,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:31,018 INFO L225 Difference]: With dead ends: 51903 [2021-06-05 05:05:31,018 INFO L226 Difference]: Without dead ends: 51867 [2021-06-05 05:05:31,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:31,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51867 states. [2021-06-05 05:05:31,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51867 to 50962. [2021-06-05 05:05:31,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50962 states, 50961 states have (on average 2.2042542336296385) internal successors, (112331), 50961 states have internal predecessors, (112331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 112331 transitions. [2021-06-05 05:05:31,910 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 112331 transitions. Word has length 56 [2021-06-05 05:05:31,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:31,910 INFO L482 AbstractCegarLoop]: Abstraction has 50962 states and 112331 transitions. [2021-06-05 05:05:31,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:31,911 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 112331 transitions. [2021-06-05 05:05:31,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:31,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:31,935 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:32,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 05:05:32,136 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:32,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1368047205, now seen corresponding path program 56 times [2021-06-05 05:05:32,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:32,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36801292] [2021-06-05 05:05:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:32,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:32,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36801292] [2021-06-05 05:05:32,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36801292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:32,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051379982] [2021-06-05 05:05:32,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:32,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:32,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:32,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:32,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:32,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051379982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:32,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:32,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:32,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926227365] [2021-06-05 05:05:32,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:32,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:32,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:32,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:32,276 INFO L87 Difference]: Start difference. First operand 50962 states and 112331 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:32,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:32,522 INFO L93 Difference]: Finished difference Result 54564 states and 119631 transitions. [2021-06-05 05:05:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:32,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:32,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:32,589 INFO L225 Difference]: With dead ends: 54564 [2021-06-05 05:05:32,589 INFO L226 Difference]: Without dead ends: 54522 [2021-06-05 05:05:32,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:32,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54522 states. [2021-06-05 05:05:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54522 to 50922. [2021-06-05 05:05:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50922 states, 50921 states have (on average 2.2044932346183304) internal successors, (112255), 50921 states have internal predecessors, (112255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50922 states to 50922 states and 112255 transitions. [2021-06-05 05:05:33,449 INFO L78 Accepts]: Start accepts. Automaton has 50922 states and 112255 transitions. Word has length 56 [2021-06-05 05:05:33,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:33,449 INFO L482 AbstractCegarLoop]: Abstraction has 50922 states and 112255 transitions. [2021-06-05 05:05:33,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:33,449 INFO L276 IsEmpty]: Start isEmpty. Operand 50922 states and 112255 transitions. [2021-06-05 05:05:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:33,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:33,474 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:33,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:33,675 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:33,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1063321585, now seen corresponding path program 57 times [2021-06-05 05:05:33,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:33,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884426454] [2021-06-05 05:05:33,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:33,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:33,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884426454] [2021-06-05 05:05:33,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884426454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:33,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526476573] [2021-06-05 05:05:33,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:33,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:05:33,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:33,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:33,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:33,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526476573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:33,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:33,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:33,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233318887] [2021-06-05 05:05:33,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:33,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:33,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:33,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:33,830 INFO L87 Difference]: Start difference. First operand 50922 states and 112255 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:34,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:34,277 INFO L93 Difference]: Finished difference Result 54000 states and 117977 transitions. [2021-06-05 05:05:34,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:34,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:34,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:34,335 INFO L225 Difference]: With dead ends: 54000 [2021-06-05 05:05:34,335 INFO L226 Difference]: Without dead ends: 53998 [2021-06-05 05:05:34,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53998 states. [2021-06-05 05:05:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53998 to 51006. [2021-06-05 05:05:35,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51006 states, 51005 states have (on average 2.203842760513675) internal successors, (112407), 51005 states have internal predecessors, (112407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:35,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51006 states to 51006 states and 112407 transitions. [2021-06-05 05:05:35,150 INFO L78 Accepts]: Start accepts. Automaton has 51006 states and 112407 transitions. Word has length 56 [2021-06-05 05:05:35,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:35,151 INFO L482 AbstractCegarLoop]: Abstraction has 51006 states and 112407 transitions. [2021-06-05 05:05:35,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:35,151 INFO L276 IsEmpty]: Start isEmpty. Operand 51006 states and 112407 transitions. [2021-06-05 05:05:35,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:35,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:35,177 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:35,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 05:05:35,378 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:35,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:35,378 INFO L82 PathProgramCache]: Analyzing trace with hash -673117659, now seen corresponding path program 58 times [2021-06-05 05:05:35,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:35,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3229636] [2021-06-05 05:05:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:35,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:35,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3229636] [2021-06-05 05:05:35,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3229636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:35,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699083578] [2021-06-05 05:05:35,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:35,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:35,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:35,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:35,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:35,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699083578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:35,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:35,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:05:35,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246318652] [2021-06-05 05:05:35,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:05:35,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:35,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:05:35,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:05:35,548 INFO L87 Difference]: Start difference. First operand 51006 states and 112407 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:35,808 INFO L93 Difference]: Finished difference Result 57784 states and 125981 transitions. [2021-06-05 05:05:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:05:35,808 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:35,877 INFO L225 Difference]: With dead ends: 57784 [2021-06-05 05:05:35,877 INFO L226 Difference]: Without dead ends: 57782 [2021-06-05 05:05:35,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:35,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57782 states. [2021-06-05 05:05:36,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57782 to 51426. [2021-06-05 05:05:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51426 states, 51425 states have (on average 2.202566844919786) internal successors, (113267), 51425 states have internal predecessors, (113267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51426 states to 51426 states and 113267 transitions. [2021-06-05 05:05:36,754 INFO L78 Accepts]: Start accepts. Automaton has 51426 states and 113267 transitions. Word has length 56 [2021-06-05 05:05:36,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:36,754 INFO L482 AbstractCegarLoop]: Abstraction has 51426 states and 113267 transitions. [2021-06-05 05:05:36,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:36,754 INFO L276 IsEmpty]: Start isEmpty. Operand 51426 states and 113267 transitions. [2021-06-05 05:05:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:36,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:36,780 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:36,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 05:05:36,981 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:36,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:36,981 INFO L82 PathProgramCache]: Analyzing trace with hash 779747271, now seen corresponding path program 59 times [2021-06-05 05:05:36,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:36,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70729707] [2021-06-05 05:05:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:37,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:37,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70729707] [2021-06-05 05:05:37,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70729707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:37,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053085451] [2021-06-05 05:05:37,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:37,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:05:37,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:37,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:37,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:37,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053085451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:37,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:37,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:05:37,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538362771] [2021-06-05 05:05:37,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:05:37,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:37,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:05:37,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:05:37,122 INFO L87 Difference]: Start difference. First operand 51426 states and 113267 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:37,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:37,379 INFO L93 Difference]: Finished difference Result 56504 states and 123265 transitions. [2021-06-05 05:05:37,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:05:37,380 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:37,446 INFO L225 Difference]: With dead ends: 56504 [2021-06-05 05:05:37,446 INFO L226 Difference]: Without dead ends: 56502 [2021-06-05 05:05:37,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:37,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56502 states. [2021-06-05 05:05:38,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56502 to 51506. [2021-06-05 05:05:38,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51506 states, 51505 states have (on average 2.2005436365401416) internal successors, (113339), 51505 states have internal predecessors, (113339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51506 states to 51506 states and 113339 transitions. [2021-06-05 05:05:38,316 INFO L78 Accepts]: Start accepts. Automaton has 51506 states and 113339 transitions. Word has length 56 [2021-06-05 05:05:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:38,316 INFO L482 AbstractCegarLoop]: Abstraction has 51506 states and 113339 transitions. [2021-06-05 05:05:38,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 51506 states and 113339 transitions. [2021-06-05 05:05:38,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:38,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:38,341 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:38,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:38,545 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:38,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1081723995, now seen corresponding path program 60 times [2021-06-05 05:05:38,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:38,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846028191] [2021-06-05 05:05:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:38,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:38,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846028191] [2021-06-05 05:05:38,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846028191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:38,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837899186] [2021-06-05 05:05:38,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:38,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 05:05:38,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:38,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:38,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:38,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837899186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:38,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:38,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 05:05:38,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951490996] [2021-06-05 05:05:38,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:05:38,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:38,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:05:38,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:05:38,702 INFO L87 Difference]: Start difference. First operand 51506 states and 113339 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:39,140 INFO L93 Difference]: Finished difference Result 53832 states and 117559 transitions. [2021-06-05 05:05:39,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:39,141 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:39,199 INFO L225 Difference]: With dead ends: 53832 [2021-06-05 05:05:39,199 INFO L226 Difference]: Without dead ends: 53830 [2021-06-05 05:05:39,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:39,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53830 states. [2021-06-05 05:05:39,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53830 to 49874. [2021-06-05 05:05:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49874 states, 49873 states have (on average 2.2004892426763982) internal successors, (109745), 49873 states have internal predecessors, (109745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49874 states to 49874 states and 109745 transitions. [2021-06-05 05:05:40,048 INFO L78 Accepts]: Start accepts. Automaton has 49874 states and 109745 transitions. Word has length 56 [2021-06-05 05:05:40,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:40,048 INFO L482 AbstractCegarLoop]: Abstraction has 49874 states and 109745 transitions. [2021-06-05 05:05:40,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:40,049 INFO L276 IsEmpty]: Start isEmpty. Operand 49874 states and 109745 transitions. [2021-06-05 05:05:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:40,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:40,073 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:40,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:40,274 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:40,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:40,274 INFO L82 PathProgramCache]: Analyzing trace with hash 2020283719, now seen corresponding path program 61 times [2021-06-05 05:05:40,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:40,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265211863] [2021-06-05 05:05:40,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:05:40,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:40,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265211863] [2021-06-05 05:05:40,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265211863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:40,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727994719] [2021-06-05 05:05:40,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:40,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:40,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:05:40,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727994719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:40,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:40,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 05:05:40,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399283684] [2021-06-05 05:05:40,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:05:40,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:40,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:05:40,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:05:40,431 INFO L87 Difference]: Start difference. First operand 49874 states and 109745 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:40,690 INFO L93 Difference]: Finished difference Result 51331 states and 112086 transitions. [2021-06-05 05:05:40,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:05:40,690 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:40,750 INFO L225 Difference]: With dead ends: 51331 [2021-06-05 05:05:40,750 INFO L226 Difference]: Without dead ends: 51235 [2021-06-05 05:05:40,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:40,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51235 states. [2021-06-05 05:05:41,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51235 to 47230. [2021-06-05 05:05:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.193673378644477) internal successors, (103605), 47229 states have internal predecessors, (103605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103605 transitions. [2021-06-05 05:05:41,592 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103605 transitions. Word has length 56 [2021-06-05 05:05:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:41,592 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103605 transitions. [2021-06-05 05:05:41,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103605 transitions. [2021-06-05 05:05:41,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:41,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:41,617 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:41,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 05:05:41,818 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:41,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:41,818 INFO L82 PathProgramCache]: Analyzing trace with hash 517101275, now seen corresponding path program 62 times [2021-06-05 05:05:41,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:41,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157196083] [2021-06-05 05:05:41,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:05:41,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:41,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157196083] [2021-06-05 05:05:41,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157196083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:41,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409542204] [2021-06-05 05:05:41,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:41,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:41,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:41,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:41,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:05:41,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409542204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:41,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:41,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:05:41,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933273688] [2021-06-05 05:05:41,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:05:41,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:41,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:05:41,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:05:41,979 INFO L87 Difference]: Start difference. First operand 47230 states and 103605 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:42,192 INFO L93 Difference]: Finished difference Result 48435 states and 105506 transitions. [2021-06-05 05:05:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:05:42,192 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:42,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:42,241 INFO L225 Difference]: With dead ends: 48435 [2021-06-05 05:05:42,241 INFO L226 Difference]: Without dead ends: 48369 [2021-06-05 05:05:42,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:42,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48369 states. [2021-06-05 05:05:42,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48369 to 47230. [2021-06-05 05:05:42,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.1912172605814226) internal successors, (103489), 47229 states have internal predecessors, (103489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103489 transitions. [2021-06-05 05:05:42,965 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103489 transitions. Word has length 56 [2021-06-05 05:05:42,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:42,965 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103489 transitions. [2021-06-05 05:05:42,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103489 transitions. [2021-06-05 05:05:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:42,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:42,992 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:43,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:43,192 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1809607417, now seen corresponding path program 63 times [2021-06-05 05:05:43,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:43,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733758143] [2021-06-05 05:05:43,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:05:43,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:43,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733758143] [2021-06-05 05:05:43,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733758143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:43,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178245656] [2021-06-05 05:05:43,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:43,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:05:43,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:43,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:43,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:05:43,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178245656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:43,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:43,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:05:43,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064914809] [2021-06-05 05:05:43,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:05:43,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:43,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:05:43,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:05:43,348 INFO L87 Difference]: Start difference. First operand 47230 states and 103489 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:43,549 INFO L93 Difference]: Finished difference Result 48187 states and 104966 transitions. [2021-06-05 05:05:43,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:05:43,550 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:43,599 INFO L225 Difference]: With dead ends: 48187 [2021-06-05 05:05:43,599 INFO L226 Difference]: Without dead ends: 48151 [2021-06-05 05:05:43,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:05:43,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48151 states. [2021-06-05 05:05:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48151 to 47230. [2021-06-05 05:05:44,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.1896927735078022) internal successors, (103417), 47229 states have internal predecessors, (103417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103417 transitions. [2021-06-05 05:05:44,369 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103417 transitions. Word has length 56 [2021-06-05 05:05:44,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:44,369 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103417 transitions. [2021-06-05 05:05:44,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:44,369 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103417 transitions. [2021-06-05 05:05:44,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:44,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:44,394 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:44,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 05:05:44,595 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:44,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:44,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2068840347, now seen corresponding path program 64 times [2021-06-05 05:05:44,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:44,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091146203] [2021-06-05 05:05:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:44,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:44,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091146203] [2021-06-05 05:05:44,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091146203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:44,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197675279] [2021-06-05 05:05:44,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:44,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:44,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:44,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:44,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:44,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197675279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:44,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:44,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:44,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633104219] [2021-06-05 05:05:44,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:44,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:44,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:44,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:44,732 INFO L87 Difference]: Start difference. First operand 47230 states and 103417 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:44,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:44,941 INFO L93 Difference]: Finished difference Result 51250 states and 111816 transitions. [2021-06-05 05:05:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:44,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:44,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:45,000 INFO L225 Difference]: With dead ends: 51250 [2021-06-05 05:05:45,001 INFO L226 Difference]: Without dead ends: 51244 [2021-06-05 05:05:45,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:45,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51244 states. [2021-06-05 05:05:45,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51244 to 50262. [2021-06-05 05:05:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50262 states, 50261 states have (on average 2.194723543104992) internal successors, (110309), 50261 states have internal predecessors, (110309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:45,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50262 states to 50262 states and 110309 transitions. [2021-06-05 05:05:45,877 INFO L78 Accepts]: Start accepts. Automaton has 50262 states and 110309 transitions. Word has length 56 [2021-06-05 05:05:45,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:45,878 INFO L482 AbstractCegarLoop]: Abstraction has 50262 states and 110309 transitions. [2021-06-05 05:05:45,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:45,878 INFO L276 IsEmpty]: Start isEmpty. Operand 50262 states and 110309 transitions. [2021-06-05 05:05:45,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:45,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:45,906 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:46,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:46,106 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:46,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1921401329, now seen corresponding path program 65 times [2021-06-05 05:05:46,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:46,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968285884] [2021-06-05 05:05:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:46,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:46,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968285884] [2021-06-05 05:05:46,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968285884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:46,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684431533] [2021-06-05 05:05:46,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:46,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:05:46,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:46,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:46,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:46,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684431533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:46,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:46,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:05:46,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859398970] [2021-06-05 05:05:46,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:05:46,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:46,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:05:46,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:05:46,261 INFO L87 Difference]: Start difference. First operand 50262 states and 110309 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:46,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:46,467 INFO L93 Difference]: Finished difference Result 52650 states and 114688 transitions. [2021-06-05 05:05:46,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:46,468 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:46,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:46,532 INFO L225 Difference]: With dead ends: 52650 [2021-06-05 05:05:46,532 INFO L226 Difference]: Without dead ends: 52650 [2021-06-05 05:05:46,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:05:46,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52650 states. [2021-06-05 05:05:47,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52650 to 50294. [2021-06-05 05:05:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50294 states, 50293 states have (on average 2.1945996460740065) internal successors, (110373), 50293 states have internal predecessors, (110373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:47,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50294 states to 50294 states and 110373 transitions. [2021-06-05 05:05:47,354 INFO L78 Accepts]: Start accepts. Automaton has 50294 states and 110373 transitions. Word has length 56 [2021-06-05 05:05:47,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:47,354 INFO L482 AbstractCegarLoop]: Abstraction has 50294 states and 110373 transitions. [2021-06-05 05:05:47,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:47,355 INFO L276 IsEmpty]: Start isEmpty. Operand 50294 states and 110373 transitions. [2021-06-05 05:05:47,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:47,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:47,387 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:47,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 05:05:47,588 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:47,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:47,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1531197403, now seen corresponding path program 66 times [2021-06-05 05:05:47,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:47,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884130759] [2021-06-05 05:05:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:47,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:47,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884130759] [2021-06-05 05:05:47,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884130759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:47,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048433179] [2021-06-05 05:05:47,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:47,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 05:05:47,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:47,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:47,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:47,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048433179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:47,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:47,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:05:47,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407847438] [2021-06-05 05:05:47,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:05:47,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:47,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:05:47,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:05:47,736 INFO L87 Difference]: Start difference. First operand 50294 states and 110373 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:47,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:47,986 INFO L93 Difference]: Finished difference Result 56418 states and 122592 transitions. [2021-06-05 05:05:47,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:05:47,986 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:47,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:48,051 INFO L225 Difference]: With dead ends: 56418 [2021-06-05 05:05:48,051 INFO L226 Difference]: Without dead ends: 56418 [2021-06-05 05:05:48,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56418 states. [2021-06-05 05:05:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56418 to 50454. [2021-06-05 05:05:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50454 states, 50453 states have (on average 2.193982518383446) internal successors, (110693), 50453 states have internal predecessors, (110693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:48,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50454 states to 50454 states and 110693 transitions. [2021-06-05 05:05:48,837 INFO L78 Accepts]: Start accepts. Automaton has 50454 states and 110693 transitions. Word has length 56 [2021-06-05 05:05:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:48,837 INFO L482 AbstractCegarLoop]: Abstraction has 50454 states and 110693 transitions. [2021-06-05 05:05:48,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:48,838 INFO L276 IsEmpty]: Start isEmpty. Operand 50454 states and 110693 transitions. [2021-06-05 05:05:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:48,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:48,863 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:49,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:49,064 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:49,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:49,064 INFO L82 PathProgramCache]: Analyzing trace with hash -78332473, now seen corresponding path program 67 times [2021-06-05 05:05:49,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:49,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704180448] [2021-06-05 05:05:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:49,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:49,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704180448] [2021-06-05 05:05:49,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704180448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:49,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250076662] [2021-06-05 05:05:49,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:49,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:49,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:49,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250076662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:49,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:49,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:05:49,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210094674] [2021-06-05 05:05:49,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:05:49,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:49,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:05:49,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:05:49,204 INFO L87 Difference]: Start difference. First operand 50454 states and 110693 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:49,622 INFO L93 Difference]: Finished difference Result 56662 states and 123166 transitions. [2021-06-05 05:05:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:05:49,622 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:49,677 INFO L225 Difference]: With dead ends: 56662 [2021-06-05 05:05:49,677 INFO L226 Difference]: Without dead ends: 56662 [2021-06-05 05:05:49,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56662 states. [2021-06-05 05:05:50,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56662 to 50614. [2021-06-05 05:05:50,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50614 states, 50613 states have (on average 2.1933692924742654) internal successors, (111013), 50613 states have internal predecessors, (111013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50614 states to 50614 states and 111013 transitions. [2021-06-05 05:05:50,278 INFO L78 Accepts]: Start accepts. Automaton has 50614 states and 111013 transitions. Word has length 56 [2021-06-05 05:05:50,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:50,279 INFO L482 AbstractCegarLoop]: Abstraction has 50614 states and 111013 transitions. [2021-06-05 05:05:50,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 50614 states and 111013 transitions. [2021-06-05 05:05:50,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:50,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:50,304 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:50,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 05:05:50,505 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:50,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:50,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1939803739, now seen corresponding path program 68 times [2021-06-05 05:05:50,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:50,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579800722] [2021-06-05 05:05:50,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:50,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:50,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579800722] [2021-06-05 05:05:50,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579800722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:50,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353045683] [2021-06-05 05:05:50,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:50,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:50,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:50,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:50,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:50,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353045683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:50,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:50,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 05:05:50,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917524704] [2021-06-05 05:05:50,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:05:50,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:50,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:05:50,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:05:50,860 INFO L87 Difference]: Start difference. First operand 50614 states and 111013 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:51,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:51,158 INFO L93 Difference]: Finished difference Result 54674 states and 118916 transitions. [2021-06-05 05:05:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:05:51,159 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:51,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:51,220 INFO L225 Difference]: With dead ends: 54674 [2021-06-05 05:05:51,220 INFO L226 Difference]: Without dead ends: 54674 [2021-06-05 05:05:51,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 307.2ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:05:51,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54674 states. [2021-06-05 05:05:51,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54674 to 50774. [2021-06-05 05:05:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50774 states, 50773 states have (on average 2.192759931459634) internal successors, (111333), 50773 states have internal predecessors, (111333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:52,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50774 states to 50774 states and 111333 transitions. [2021-06-05 05:05:52,172 INFO L78 Accepts]: Start accepts. Automaton has 50774 states and 111333 transitions. Word has length 56 [2021-06-05 05:05:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:52,172 INFO L482 AbstractCegarLoop]: Abstraction has 50774 states and 111333 transitions. [2021-06-05 05:05:52,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 50774 states and 111333 transitions. [2021-06-05 05:05:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:05:52,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:52,196 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:52,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:52,397 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:52,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1664826169, now seen corresponding path program 69 times [2021-06-05 05:05:52,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:52,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712213270] [2021-06-05 05:05:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:52,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:52,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712213270] [2021-06-05 05:05:52,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712213270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:52,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086329879] [2021-06-05 05:05:52,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:52,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 05:05:52,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:52,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:05:52,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:52,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086329879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:52,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:52,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:05:52,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073817881] [2021-06-05 05:05:52,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:05:52,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:52,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:05:52,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:05:52,585 INFO L87 Difference]: Start difference. First operand 50774 states and 111333 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:52,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:52,897 INFO L93 Difference]: Finished difference Result 52880 states and 115293 transitions. [2021-06-05 05:05:52,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:05:52,898 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:05:52,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:52,972 INFO L225 Difference]: With dead ends: 52880 [2021-06-05 05:05:52,972 INFO L226 Difference]: Without dead ends: 52880 [2021-06-05 05:05:52,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52880 states. [2021-06-05 05:05:53,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52880 to 49354. [2021-06-05 05:05:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49354 states, 49353 states have (on average 2.193686300731465) internal successors, (108265), 49353 states have internal predecessors, (108265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:53,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49354 states to 49354 states and 108265 transitions. [2021-06-05 05:05:53,811 INFO L78 Accepts]: Start accepts. Automaton has 49354 states and 108265 transitions. Word has length 56 [2021-06-05 05:05:53,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:53,811 INFO L482 AbstractCegarLoop]: Abstraction has 49354 states and 108265 transitions. [2021-06-05 05:05:53,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:53,812 INFO L276 IsEmpty]: Start isEmpty. Operand 49354 states and 108265 transitions. [2021-06-05 05:05:53,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:05:53,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:53,846 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:54,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:54,046 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:54,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:54,046 INFO L82 PathProgramCache]: Analyzing trace with hash -418208773, now seen corresponding path program 70 times [2021-06-05 05:05:54,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:54,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781216374] [2021-06-05 05:05:54,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:54,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:54,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781216374] [2021-06-05 05:05:54,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781216374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:54,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121602034] [2021-06-05 05:05:54,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:54,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:54,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:54,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:05:54,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:54,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121602034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:54,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:54,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 05:05:54,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333799086] [2021-06-05 05:05:54,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:05:54,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:54,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:05:54,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:05:54,239 INFO L87 Difference]: Start difference. First operand 49354 states and 108265 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:54,558 INFO L93 Difference]: Finished difference Result 55302 states and 120443 transitions. [2021-06-05 05:05:54,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:05:54,559 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:05:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:54,622 INFO L225 Difference]: With dead ends: 55302 [2021-06-05 05:05:54,622 INFO L226 Difference]: Without dead ends: 55302 [2021-06-05 05:05:54,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:05:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55302 states. [2021-06-05 05:05:55,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55302 to 49998. [2021-06-05 05:05:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49998 states, 49997 states have (on average 2.195831749904994) internal successors, (109785), 49997 states have internal predecessors, (109785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:55,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49998 states to 49998 states and 109785 transitions. [2021-06-05 05:05:55,451 INFO L78 Accepts]: Start accepts. Automaton has 49998 states and 109785 transitions. Word has length 66 [2021-06-05 05:05:55,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:55,451 INFO L482 AbstractCegarLoop]: Abstraction has 49998 states and 109785 transitions. [2021-06-05 05:05:55,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:55,451 INFO L276 IsEmpty]: Start isEmpty. Operand 49998 states and 109785 transitions. [2021-06-05 05:05:55,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:05:55,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:55,487 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:55,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:55,696 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:55,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:55,696 INFO L82 PathProgramCache]: Analyzing trace with hash -12185795, now seen corresponding path program 71 times [2021-06-05 05:05:55,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:55,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887220148] [2021-06-05 05:05:55,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:55,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:55,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887220148] [2021-06-05 05:05:55,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887220148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:55,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254930808] [2021-06-05 05:05:55,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:55,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:05:55,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:55,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:05:55,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:55,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254930808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:55,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:55,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:05:55,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649466712] [2021-06-05 05:05:55,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:05:55,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:55,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:05:55,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:05:55,862 INFO L87 Difference]: Start difference. First operand 49998 states and 109785 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:56,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:56,126 INFO L93 Difference]: Finished difference Result 51084 states and 111615 transitions. [2021-06-05 05:05:56,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:05:56,126 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:05:56,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:56,182 INFO L225 Difference]: With dead ends: 51084 [2021-06-05 05:05:56,183 INFO L226 Difference]: Without dead ends: 51076 [2021-06-05 05:05:56,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:05:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51076 states. [2021-06-05 05:05:56,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51076 to 49894. [2021-06-05 05:05:56,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49894 states, 49893 states have (on average 2.193995149620187) internal successors, (109465), 49893 states have internal predecessors, (109465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:57,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49894 states to 49894 states and 109465 transitions. [2021-06-05 05:05:57,017 INFO L78 Accepts]: Start accepts. Automaton has 49894 states and 109465 transitions. Word has length 66 [2021-06-05 05:05:57,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:57,017 INFO L482 AbstractCegarLoop]: Abstraction has 49894 states and 109465 transitions. [2021-06-05 05:05:57,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:57,018 INFO L276 IsEmpty]: Start isEmpty. Operand 49894 states and 109465 transitions. [2021-06-05 05:05:57,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:05:57,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:57,057 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:57,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:57,258 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:57,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:57,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1308699737, now seen corresponding path program 72 times [2021-06-05 05:05:57,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:57,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374129776] [2021-06-05 05:05:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:57,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:57,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374129776] [2021-06-05 05:05:57,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374129776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:57,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052923484] [2021-06-05 05:05:57,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:57,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:05:57,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:57,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:05:57,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:57,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052923484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:57,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:57,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:05:57,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112598143] [2021-06-05 05:05:57,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:05:57,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:57,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:05:57,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:05:57,458 INFO L87 Difference]: Start difference. First operand 49894 states and 109465 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:57,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:57,749 INFO L93 Difference]: Finished difference Result 58739 states and 127815 transitions. [2021-06-05 05:05:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:05:57,750 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:05:57,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:57,836 INFO L225 Difference]: With dead ends: 58739 [2021-06-05 05:05:57,836 INFO L226 Difference]: Without dead ends: 58739 [2021-06-05 05:05:57,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:05:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58739 states. [2021-06-05 05:05:58,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58739 to 53954. [2021-06-05 05:05:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53954 states, 53953 states have (on average 2.204678145793561) internal successors, (118949), 53953 states have internal predecessors, (118949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:58,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53954 states to 53954 states and 118949 transitions. [2021-06-05 05:05:58,785 INFO L78 Accepts]: Start accepts. Automaton has 53954 states and 118949 transitions. Word has length 66 [2021-06-05 05:05:58,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:58,786 INFO L482 AbstractCegarLoop]: Abstraction has 53954 states and 118949 transitions. [2021-06-05 05:05:58,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:58,786 INFO L276 IsEmpty]: Start isEmpty. Operand 53954 states and 118949 transitions. [2021-06-05 05:05:58,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:05:58,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:58,822 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:59,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:59,023 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:59,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:59,024 INFO L82 PathProgramCache]: Analyzing trace with hash -138643737, now seen corresponding path program 73 times [2021-06-05 05:05:59,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:59,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222455780] [2021-06-05 05:05:59,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:59,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:59,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222455780] [2021-06-05 05:05:59,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222455780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:59,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194235188] [2021-06-05 05:05:59,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:59,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:05:59,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:59,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194235188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:59,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:59,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:05:59,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468031515] [2021-06-05 05:05:59,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:05:59,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:59,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:05:59,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:05:59,196 INFO L87 Difference]: Start difference. First operand 53954 states and 118949 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:59,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:59,436 INFO L93 Difference]: Finished difference Result 56467 states and 123155 transitions. [2021-06-05 05:05:59,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:05:59,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:05:59,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:59,502 INFO L225 Difference]: With dead ends: 56467 [2021-06-05 05:05:59,502 INFO L226 Difference]: Without dead ends: 56375 [2021-06-05 05:05:59,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:05:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56375 states. [2021-06-05 05:06:00,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56375 to 51614. [2021-06-05 05:06:00,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51614 states, 51613 states have (on average 2.1976827543448354) internal successors, (113429), 51613 states have internal predecessors, (113429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113429 transitions. [2021-06-05 05:06:00,402 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113429 transitions. Word has length 66 [2021-06-05 05:06:00,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:00,402 INFO L482 AbstractCegarLoop]: Abstraction has 51614 states and 113429 transitions. [2021-06-05 05:06:00,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:00,402 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113429 transitions. [2021-06-05 05:06:00,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:00,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:00,438 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:00,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:00,639 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:00,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:00,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1619583693, now seen corresponding path program 74 times [2021-06-05 05:06:00,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:00,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801681288] [2021-06-05 05:06:00,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:00,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:00,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801681288] [2021-06-05 05:06:00,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801681288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:00,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544404161] [2021-06-05 05:06:00,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:00,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:00,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:00,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:06:00,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:00,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544404161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:00,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:00,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:06:00,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990279512] [2021-06-05 05:06:00,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:06:00,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:00,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:06:00,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:06:00,809 INFO L87 Difference]: Start difference. First operand 51614 states and 113429 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:01,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:01,122 INFO L93 Difference]: Finished difference Result 53573 states and 116784 transitions. [2021-06-05 05:06:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:06:01,122 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:01,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:01,196 INFO L225 Difference]: With dead ends: 53573 [2021-06-05 05:06:01,196 INFO L226 Difference]: Without dead ends: 53525 [2021-06-05 05:06:01,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:01,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53525 states. [2021-06-05 05:06:01,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53525 to 51614. [2021-06-05 05:06:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51614 states, 51613 states have (on average 2.196520256524519) internal successors, (113369), 51613 states have internal predecessors, (113369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113369 transitions. [2021-06-05 05:06:02,113 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113369 transitions. Word has length 66 [2021-06-05 05:06:02,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:02,113 INFO L482 AbstractCegarLoop]: Abstraction has 51614 states and 113369 transitions. [2021-06-05 05:06:02,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:02,113 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113369 transitions. [2021-06-05 05:06:02,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:02,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:02,148 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:02,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:02,348 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:02,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:02,349 INFO L82 PathProgramCache]: Analyzing trace with hash -607697029, now seen corresponding path program 75 times [2021-06-05 05:06:02,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:02,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041459096] [2021-06-05 05:06:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:06:02,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:02,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041459096] [2021-06-05 05:06:02,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041459096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:02,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470596938] [2021-06-05 05:06:02,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:02,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:06:02,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:02,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:06:02,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:06:02,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470596938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:02,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:02,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:06:02,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39415863] [2021-06-05 05:06:02,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:06:02,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:02,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:06:02,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:06:02,539 INFO L87 Difference]: Start difference. First operand 51614 states and 113369 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:02,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:02,857 INFO L93 Difference]: Finished difference Result 66038 states and 143412 transitions. [2021-06-05 05:06:02,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:06:02,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:02,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:03,259 INFO L225 Difference]: With dead ends: 66038 [2021-06-05 05:06:03,259 INFO L226 Difference]: Without dead ends: 66011 [2021-06-05 05:06:03,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:03,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66011 states. [2021-06-05 05:06:03,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66011 to 55054. [2021-06-05 05:06:03,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55054 states, 55053 states have (on average 2.1976822334840973) internal successors, (120989), 55053 states have internal predecessors, (120989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55054 states to 55054 states and 120989 transitions. [2021-06-05 05:06:03,967 INFO L78 Accepts]: Start accepts. Automaton has 55054 states and 120989 transitions. Word has length 66 [2021-06-05 05:06:03,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:03,967 INFO L482 AbstractCegarLoop]: Abstraction has 55054 states and 120989 transitions. [2021-06-05 05:06:03,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 55054 states and 120989 transitions. [2021-06-05 05:06:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:04,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:04,002 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:04,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 05:06:04,203 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:04,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:04,203 INFO L82 PathProgramCache]: Analyzing trace with hash -321373819, now seen corresponding path program 76 times [2021-06-05 05:06:04,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:04,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645245146] [2021-06-05 05:06:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:04,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:04,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645245146] [2021-06-05 05:06:04,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645245146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:04,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889186362] [2021-06-05 05:06:04,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:04,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:04,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:04,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:06:04,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:04,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889186362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:04,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:04,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:06:04,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506690423] [2021-06-05 05:06:04,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:06:04,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:04,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:06:04,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:06:04,363 INFO L87 Difference]: Start difference. First operand 55054 states and 120989 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:04,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:04,828 INFO L93 Difference]: Finished difference Result 64613 states and 140751 transitions. [2021-06-05 05:06:04,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:06:04,829 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:04,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:04,901 INFO L225 Difference]: With dead ends: 64613 [2021-06-05 05:06:04,901 INFO L226 Difference]: Without dead ends: 64613 [2021-06-05 05:06:04,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:06:04,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64613 states. [2021-06-05 05:06:05,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64613 to 59214. [2021-06-05 05:06:05,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59214 states, 59213 states have (on average 2.2070322395419923) internal successors, (130685), 59213 states have internal predecessors, (130685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:05,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59214 states to 59214 states and 130685 transitions. [2021-06-05 05:06:05,969 INFO L78 Accepts]: Start accepts. Automaton has 59214 states and 130685 transitions. Word has length 66 [2021-06-05 05:06:05,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:05,969 INFO L482 AbstractCegarLoop]: Abstraction has 59214 states and 130685 transitions. [2021-06-05 05:06:05,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:05,969 INFO L276 IsEmpty]: Start isEmpty. Operand 59214 states and 130685 transitions. [2021-06-05 05:06:06,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:06,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:06,004 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:06,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:06,205 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:06,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:06,205 INFO L82 PathProgramCache]: Analyzing trace with hash 848682181, now seen corresponding path program 77 times [2021-06-05 05:06:06,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:06,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899052870] [2021-06-05 05:06:06,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:06,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:06,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899052870] [2021-06-05 05:06:06,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899052870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:06,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751822681] [2021-06-05 05:06:06,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:06,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:06:06,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:06,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:06:06,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:06,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751822681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:06,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:06,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:06:06,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4573819] [2021-06-05 05:06:06,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:06:06,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:06,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:06:06,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:06:06,354 INFO L87 Difference]: Start difference. First operand 59214 states and 130685 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:06,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:06,600 INFO L93 Difference]: Finished difference Result 61966 states and 135259 transitions. [2021-06-05 05:06:06,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:06:06,601 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:06,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:06,670 INFO L225 Difference]: With dead ends: 61966 [2021-06-05 05:06:06,670 INFO L226 Difference]: Without dead ends: 61870 [2021-06-05 05:06:06,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:06:06,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61870 states. [2021-06-05 05:06:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61870 to 56914. [2021-06-05 05:06:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56914 states, 56913 states have (on average 2.2002178764078506) internal successors, (125221), 56913 states have internal predecessors, (125221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:07,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56914 states to 56914 states and 125221 transitions. [2021-06-05 05:06:07,622 INFO L78 Accepts]: Start accepts. Automaton has 56914 states and 125221 transitions. Word has length 66 [2021-06-05 05:06:07,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:07,623 INFO L482 AbstractCegarLoop]: Abstraction has 56914 states and 125221 transitions. [2021-06-05 05:06:07,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:07,623 INFO L276 IsEmpty]: Start isEmpty. Operand 56914 states and 125221 transitions. [2021-06-05 05:06:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:07,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:07,661 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:07,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 05:06:07,862 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:07,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1688057685, now seen corresponding path program 78 times [2021-06-05 05:06:07,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:07,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465700406] [2021-06-05 05:06:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:07,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:07,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465700406] [2021-06-05 05:06:07,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465700406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:07,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684555923] [2021-06-05 05:06:07,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:07,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 05:06:07,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:07,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:06:07,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:08,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684555923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:08,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:08,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:06:08,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882529753] [2021-06-05 05:06:08,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:06:08,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:08,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:06:08,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:06:08,012 INFO L87 Difference]: Start difference. First operand 56914 states and 125221 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:08,275 INFO L93 Difference]: Finished difference Result 59554 states and 129655 transitions. [2021-06-05 05:06:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:06:08,276 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:08,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:08,346 INFO L225 Difference]: With dead ends: 59554 [2021-06-05 05:06:08,346 INFO L226 Difference]: Without dead ends: 59458 [2021-06-05 05:06:08,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59458 states. [2021-06-05 05:06:09,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59458 to 56894. [2021-06-05 05:06:09,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56894 states, 56893 states have (on average 2.1983548063909444) internal successors, (125071), 56893 states have internal predecessors, (125071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:09,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56894 states to 56894 states and 125071 transitions. [2021-06-05 05:06:09,331 INFO L78 Accepts]: Start accepts. Automaton has 56894 states and 125071 transitions. Word has length 66 [2021-06-05 05:06:09,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:09,331 INFO L482 AbstractCegarLoop]: Abstraction has 56894 states and 125071 transitions. [2021-06-05 05:06:09,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:09,331 INFO L276 IsEmpty]: Start isEmpty. Operand 56894 states and 125071 transitions. [2021-06-05 05:06:09,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:09,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:09,369 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:09,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:09,570 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:09,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:09,570 INFO L82 PathProgramCache]: Analyzing trace with hash -326026235, now seen corresponding path program 79 times [2021-06-05 05:06:09,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:09,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497531346] [2021-06-05 05:06:09,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:09,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:09,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497531346] [2021-06-05 05:06:09,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497531346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:09,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320918549] [2021-06-05 05:06:09,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:09,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:06:09,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:09,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320918549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:09,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:09,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 05:06:09,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364465890] [2021-06-05 05:06:09,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:06:09,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:09,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:06:09,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:06:09,717 INFO L87 Difference]: Start difference. First operand 56894 states and 125071 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:09,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:09,991 INFO L93 Difference]: Finished difference Result 59114 states and 128843 transitions. [2021-06-05 05:06:09,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:06:09,993 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:09,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:10,059 INFO L225 Difference]: With dead ends: 59114 [2021-06-05 05:06:10,059 INFO L226 Difference]: Without dead ends: 58982 [2021-06-05 05:06:10,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:10,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58982 states. [2021-06-05 05:06:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58982 to 56922. [2021-06-05 05:06:10,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56922 states, 56921 states have (on average 2.1963950036014825) internal successors, (125021), 56921 states have internal predecessors, (125021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56922 states to 56922 states and 125021 transitions. [2021-06-05 05:06:10,986 INFO L78 Accepts]: Start accepts. Automaton has 56922 states and 125021 transitions. Word has length 66 [2021-06-05 05:06:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:10,986 INFO L482 AbstractCegarLoop]: Abstraction has 56922 states and 125021 transitions. [2021-06-05 05:06:10,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:10,986 INFO L276 IsEmpty]: Start isEmpty. Operand 56922 states and 125021 transitions. [2021-06-05 05:06:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:11,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:11,022 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:11,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:11,222 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:11,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:11,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1465776773, now seen corresponding path program 80 times [2021-06-05 05:06:11,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:11,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467520794] [2021-06-05 05:06:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:06:11,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:11,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467520794] [2021-06-05 05:06:11,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467520794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:11,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671819906] [2021-06-05 05:06:11,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:11,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:11,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:11,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:06:11,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:06:11,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671819906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:11,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:11,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:06:11,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868676459] [2021-06-05 05:06:11,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:06:11,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:11,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:06:11,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:06:11,402 INFO L87 Difference]: Start difference. First operand 56922 states and 125021 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:11,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:11,684 INFO L93 Difference]: Finished difference Result 69297 states and 150869 transitions. [2021-06-05 05:06:11,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:06:11,684 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:11,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:11,758 INFO L225 Difference]: With dead ends: 69297 [2021-06-05 05:06:11,758 INFO L226 Difference]: Without dead ends: 69270 [2021-06-05 05:06:11,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:06:12,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69270 states. [2021-06-05 05:06:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69270 to 56622. [2021-06-05 05:06:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56622 states, 56621 states have (on average 2.1971529997704033) internal successors, (124405), 56621 states have internal predecessors, (124405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56622 states to 56622 states and 124405 transitions. [2021-06-05 05:06:12,742 INFO L78 Accepts]: Start accepts. Automaton has 56622 states and 124405 transitions. Word has length 66 [2021-06-05 05:06:12,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:12,743 INFO L482 AbstractCegarLoop]: Abstraction has 56622 states and 124405 transitions. [2021-06-05 05:06:12,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:12,743 INFO L276 IsEmpty]: Start isEmpty. Operand 56622 states and 124405 transitions. [2021-06-05 05:06:12,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:12,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:12,777 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:12,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:12,978 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:12,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:12,978 INFO L82 PathProgramCache]: Analyzing trace with hash -904475993, now seen corresponding path program 81 times [2021-06-05 05:06:12,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:12,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063253021] [2021-06-05 05:06:12,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:13,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:13,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063253021] [2021-06-05 05:06:13,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063253021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:13,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311759415] [2021-06-05 05:06:13,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:13,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 05:06:13,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:13,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:06:13,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:13,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311759415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:13,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:13,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:06:13,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710959201] [2021-06-05 05:06:13,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:06:13,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:13,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:06:13,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:06:13,144 INFO L87 Difference]: Start difference. First operand 56622 states and 124405 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:13,638 INFO L93 Difference]: Finished difference Result 67026 states and 146165 transitions. [2021-06-05 05:06:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:06:13,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:13,707 INFO L225 Difference]: With dead ends: 67026 [2021-06-05 05:06:13,708 INFO L226 Difference]: Without dead ends: 67023 [2021-06-05 05:06:13,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:06:13,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67023 states. [2021-06-05 05:06:14,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67023 to 62354. [2021-06-05 05:06:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62354 states, 62353 states have (on average 2.206229050727311) internal successors, (137565), 62353 states have internal predecessors, (137565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62354 states to 62354 states and 137565 transitions. [2021-06-05 05:06:14,761 INFO L78 Accepts]: Start accepts. Automaton has 62354 states and 137565 transitions. Word has length 66 [2021-06-05 05:06:14,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:14,762 INFO L482 AbstractCegarLoop]: Abstraction has 62354 states and 137565 transitions. [2021-06-05 05:06:14,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:14,762 INFO L276 IsEmpty]: Start isEmpty. Operand 62354 states and 137565 transitions. [2021-06-05 05:06:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:14,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:14,800 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:15,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:15,001 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:15,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:15,001 INFO L82 PathProgramCache]: Analyzing trace with hash 265580007, now seen corresponding path program 82 times [2021-06-05 05:06:15,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:15,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602615496] [2021-06-05 05:06:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:15,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:15,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602615496] [2021-06-05 05:06:15,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602615496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:15,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603416635] [2021-06-05 05:06:15,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:15,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:15,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:15,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:06:15,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:15,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603416635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:15,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:15,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:06:15,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825050717] [2021-06-05 05:06:15,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:06:15,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:15,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:06:15,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:06:15,157 INFO L87 Difference]: Start difference. First operand 62354 states and 137565 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:15,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:15,413 INFO L93 Difference]: Finished difference Result 65089 states and 142128 transitions. [2021-06-05 05:06:15,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:06:15,414 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:15,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:15,481 INFO L225 Difference]: With dead ends: 65089 [2021-06-05 05:06:15,481 INFO L226 Difference]: Without dead ends: 65029 [2021-06-05 05:06:15,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:06:15,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65029 states. [2021-06-05 05:06:16,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65029 to 59590. [2021-06-05 05:06:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.20163117353874) internal successors, (131193), 59589 states have internal predecessors, (131193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:16,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 131193 transitions. [2021-06-05 05:06:16,456 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 131193 transitions. Word has length 66 [2021-06-05 05:06:16,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:16,456 INFO L482 AbstractCegarLoop]: Abstraction has 59590 states and 131193 transitions. [2021-06-05 05:06:16,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:16,457 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 131193 transitions. [2021-06-05 05:06:16,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:16,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:16,496 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:16,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:16,698 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:16,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:16,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2023807437, now seen corresponding path program 83 times [2021-06-05 05:06:16,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:16,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245589141] [2021-06-05 05:06:16,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:16,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:16,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245589141] [2021-06-05 05:06:16,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245589141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:16,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434284458] [2021-06-05 05:06:16,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:16,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 05:06:16,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:16,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:06:16,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:16,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434284458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:16,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:16,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:06:16,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86055863] [2021-06-05 05:06:16,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:06:16,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:16,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:06:16,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:06:16,841 INFO L87 Difference]: Start difference. First operand 59590 states and 131193 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:17,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:17,099 INFO L93 Difference]: Finished difference Result 62315 states and 135765 transitions. [2021-06-05 05:06:17,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:06:17,099 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:17,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:17,169 INFO L225 Difference]: With dead ends: 62315 [2021-06-05 05:06:17,169 INFO L226 Difference]: Without dead ends: 62243 [2021-06-05 05:06:17,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:17,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62243 states. [2021-06-05 05:06:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62243 to 59590. [2021-06-05 05:06:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.1996173790464684) internal successors, (131073), 59589 states have internal predecessors, (131073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:18,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 131073 transitions. [2021-06-05 05:06:18,090 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 131073 transitions. Word has length 66 [2021-06-05 05:06:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:18,091 INFO L482 AbstractCegarLoop]: Abstraction has 59590 states and 131073 transitions. [2021-06-05 05:06:18,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 131073 transitions. [2021-06-05 05:06:18,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:18,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:18,126 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:18,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:18,326 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:18,326 INFO L82 PathProgramCache]: Analyzing trace with hash -909128409, now seen corresponding path program 84 times [2021-06-05 05:06:18,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:18,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635553311] [2021-06-05 05:06:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:18,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:18,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635553311] [2021-06-05 05:06:18,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635553311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:18,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786967979] [2021-06-05 05:06:18,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:18,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 05:06:18,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:18,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:06:18,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:18,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786967979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:18,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:18,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 05:06:18,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727762519] [2021-06-05 05:06:18,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:06:18,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:18,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:06:18,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:06:18,480 INFO L87 Difference]: Start difference. First operand 59590 states and 131073 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:18,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:18,748 INFO L93 Difference]: Finished difference Result 62467 states and 135889 transitions. [2021-06-05 05:06:18,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:06:18,749 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:18,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:18,817 INFO L225 Difference]: With dead ends: 62467 [2021-06-05 05:06:18,818 INFO L226 Difference]: Without dead ends: 62335 [2021-06-05 05:06:18,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:18,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62335 states. [2021-06-05 05:06:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62335 to 59590. [2021-06-05 05:06:19,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.1969323197234387) internal successors, (130913), 59589 states have internal predecessors, (130913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:19,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 130913 transitions. [2021-06-05 05:06:19,798 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 130913 transitions. Word has length 66 [2021-06-05 05:06:19,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:19,798 INFO L482 AbstractCegarLoop]: Abstraction has 59590 states and 130913 transitions. [2021-06-05 05:06:19,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:19,799 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 130913 transitions. [2021-06-05 05:06:19,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:19,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:19,834 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:20,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 05:06:20,034 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:20,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:20,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1791126029, now seen corresponding path program 85 times [2021-06-05 05:06:20,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:20,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316161538] [2021-06-05 05:06:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:20,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:20,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316161538] [2021-06-05 05:06:20,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316161538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:20,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203088454] [2021-06-05 05:06:20,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:20,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:06:20,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:20,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203088454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:20,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:20,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:06:20,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229711656] [2021-06-05 05:06:20,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:06:20,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:20,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:06:20,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:06:20,215 INFO L87 Difference]: Start difference. First operand 59590 states and 130913 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:20,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:20,731 INFO L93 Difference]: Finished difference Result 62011 states and 135009 transitions. [2021-06-05 05:06:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:06:20,732 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:20,793 INFO L225 Difference]: With dead ends: 62011 [2021-06-05 05:06:20,793 INFO L226 Difference]: Without dead ends: 61819 [2021-06-05 05:06:20,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:06:20,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61819 states. [2021-06-05 05:06:21,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61819 to 59670. [2021-06-05 05:06:21,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59670 states, 59669 states have (on average 2.193383498969314) internal successors, (130877), 59669 states have internal predecessors, (130877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:21,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59670 states to 59670 states and 130877 transitions. [2021-06-05 05:06:21,515 INFO L78 Accepts]: Start accepts. Automaton has 59670 states and 130877 transitions. Word has length 66 [2021-06-05 05:06:21,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:21,515 INFO L482 AbstractCegarLoop]: Abstraction has 59670 states and 130877 transitions. [2021-06-05 05:06:21,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:21,515 INFO L276 IsEmpty]: Start isEmpty. Operand 59670 states and 130877 transitions. [2021-06-05 05:06:21,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:21,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:21,554 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:21,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:21,754 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:21,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:21,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1714547269, now seen corresponding path program 86 times [2021-06-05 05:06:21,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:21,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316600782] [2021-06-05 05:06:21,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 05:06:21,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:21,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316600782] [2021-06-05 05:06:21,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316600782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:21,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619470060] [2021-06-05 05:06:21,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:22,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:22,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:22,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:06:22,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 05:06:22,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619470060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:22,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:22,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 05:06:22,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121377073] [2021-06-05 05:06:22,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:06:22,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:22,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:06:22,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:06:22,121 INFO L87 Difference]: Start difference. First operand 59670 states and 130877 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:22,371 INFO L93 Difference]: Finished difference Result 65831 states and 143283 transitions. [2021-06-05 05:06:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:06:22,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:22,442 INFO L225 Difference]: With dead ends: 65831 [2021-06-05 05:06:22,442 INFO L226 Difference]: Without dead ends: 65774 [2021-06-05 05:06:22,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:22,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65774 states. [2021-06-05 05:06:22,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65774 to 55516. [2021-06-05 05:06:23,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55516 states, 55515 states have (on average 2.1908132937044043) internal successors, (121623), 55515 states have internal predecessors, (121623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55516 states to 55516 states and 121623 transitions. [2021-06-05 05:06:23,415 INFO L78 Accepts]: Start accepts. Automaton has 55516 states and 121623 transitions. Word has length 66 [2021-06-05 05:06:23,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:23,415 INFO L482 AbstractCegarLoop]: Abstraction has 55516 states and 121623 transitions. [2021-06-05 05:06:23,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 55516 states and 121623 transitions. [2021-06-05 05:06:23,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:23,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:23,446 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:23,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 05:06:23,646 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:23,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:23,646 INFO L82 PathProgramCache]: Analyzing trace with hash 129559749, now seen corresponding path program 87 times [2021-06-05 05:06:23,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:23,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654234834] [2021-06-05 05:06:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:06:23,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:23,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654234834] [2021-06-05 05:06:23,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654234834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:23,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617056961] [2021-06-05 05:06:23,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:23,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 05:06:23,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:23,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:06:23,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:06:23,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617056961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:23,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:23,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:06:23,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60318613] [2021-06-05 05:06:23,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:06:23,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:23,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:06:23,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:06:23,851 INFO L87 Difference]: Start difference. First operand 55516 states and 121623 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:24,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:24,078 INFO L93 Difference]: Finished difference Result 61581 states and 133847 transitions. [2021-06-05 05:06:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:06:24,078 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:24,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:24,145 INFO L225 Difference]: With dead ends: 61581 [2021-06-05 05:06:24,145 INFO L226 Difference]: Without dead ends: 61554 [2021-06-05 05:06:24,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61554 states. [2021-06-05 05:06:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61554 to 54860. [2021-06-05 05:06:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54860 states, 54859 states have (on average 2.1912721704733955) internal successors, (120211), 54859 states have internal predecessors, (120211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:25,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54860 states to 54860 states and 120211 transitions. [2021-06-05 05:06:25,077 INFO L78 Accepts]: Start accepts. Automaton has 54860 states and 120211 transitions. Word has length 66 [2021-06-05 05:06:25,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:25,077 INFO L482 AbstractCegarLoop]: Abstraction has 54860 states and 120211 transitions. [2021-06-05 05:06:25,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:25,077 INFO L276 IsEmpty]: Start isEmpty. Operand 54860 states and 120211 transitions. [2021-06-05 05:06:25,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:25,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:25,108 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:25,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:25,308 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:25,309 INFO L82 PathProgramCache]: Analyzing trace with hash -518473861, now seen corresponding path program 88 times [2021-06-05 05:06:25,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:25,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724504875] [2021-06-05 05:06:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:06:25,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:25,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724504875] [2021-06-05 05:06:25,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724504875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:25,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224392218] [2021-06-05 05:06:25,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:25,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:25,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:25,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:06:25,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:06:25,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224392218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:25,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:25,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:06:25,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163469076] [2021-06-05 05:06:25,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:06:25,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:25,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:06:25,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:06:25,450 INFO L87 Difference]: Start difference. First operand 54860 states and 120211 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:25,674 INFO L93 Difference]: Finished difference Result 62633 states and 136579 transitions. [2021-06-05 05:06:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:06:25,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:25,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:25,743 INFO L225 Difference]: With dead ends: 62633 [2021-06-05 05:06:25,743 INFO L226 Difference]: Without dead ends: 62630 [2021-06-05 05:06:25,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:06:25,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62630 states. [2021-06-05 05:06:26,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62630 to 56940. [2021-06-05 05:06:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56940 states, 56939 states have (on average 2.195525035564376) internal successors, (125011), 56939 states have internal predecessors, (125011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:26,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56940 states to 56940 states and 125011 transitions. [2021-06-05 05:06:26,751 INFO L78 Accepts]: Start accepts. Automaton has 56940 states and 125011 transitions. Word has length 66 [2021-06-05 05:06:26,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:26,752 INFO L482 AbstractCegarLoop]: Abstraction has 56940 states and 125011 transitions. [2021-06-05 05:06:26,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:26,752 INFO L276 IsEmpty]: Start isEmpty. Operand 56940 states and 125011 transitions. [2021-06-05 05:06:26,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:26,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:26,786 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:26,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 05:06:26,987 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:26,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:26,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1653142277, now seen corresponding path program 89 times [2021-06-05 05:06:26,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:26,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75809069] [2021-06-05 05:06:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:27,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:27,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75809069] [2021-06-05 05:06:27,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75809069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:27,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472054900] [2021-06-05 05:06:27,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:27,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 05:06:27,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:27,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:06:27,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:27,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472054900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:27,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:27,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:06:27,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061048047] [2021-06-05 05:06:27,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:06:27,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:27,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:06:27,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:06:27,160 INFO L87 Difference]: Start difference. First operand 56940 states and 125011 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:27,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:27,461 INFO L93 Difference]: Finished difference Result 66890 states and 145747 transitions. [2021-06-05 05:06:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:06:27,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:27,536 INFO L225 Difference]: With dead ends: 66890 [2021-06-05 05:06:27,536 INFO L226 Difference]: Without dead ends: 66890 [2021-06-05 05:06:27,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:06:27,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66890 states. [2021-06-05 05:06:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66890 to 62652. [2021-06-05 05:06:28,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62652 states, 62651 states have (on average 2.2049288917974175) internal successors, (138141), 62651 states have internal predecessors, (138141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62652 states to 62652 states and 138141 transitions. [2021-06-05 05:06:28,608 INFO L78 Accepts]: Start accepts. Automaton has 62652 states and 138141 transitions. Word has length 66 [2021-06-05 05:06:28,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:28,608 INFO L482 AbstractCegarLoop]: Abstraction has 62652 states and 138141 transitions. [2021-06-05 05:06:28,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 62652 states and 138141 transitions. [2021-06-05 05:06:28,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:28,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:28,645 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:28,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 05:06:28,846 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:28,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:28,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1471769019, now seen corresponding path program 90 times [2021-06-05 05:06:28,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:28,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185404714] [2021-06-05 05:06:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:28,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:28,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185404714] [2021-06-05 05:06:28,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185404714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:28,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599384318] [2021-06-05 05:06:28,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:28,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 05:06:28,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:28,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:06:28,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 27 proven. 74 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-05 05:06:29,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599384318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:29,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:29,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 05:06:29,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156594901] [2021-06-05 05:06:29,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:06:29,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:29,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:06:29,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:06:29,035 INFO L87 Difference]: Start difference. First operand 62652 states and 138141 transitions. Second operand has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:30,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:30,506 INFO L93 Difference]: Finished difference Result 90468 states and 195554 transitions. [2021-06-05 05:06:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 05:06:30,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:30,598 INFO L225 Difference]: With dead ends: 90468 [2021-06-05 05:06:30,598 INFO L226 Difference]: Without dead ends: 90440 [2021-06-05 05:06:30,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 571.0ms TimeCoverageRelationStatistics Valid=788, Invalid=4182, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:06:30,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90440 states. [2021-06-05 05:06:31,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90440 to 64804. [2021-06-05 05:06:31,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64804 states, 64803 states have (on average 2.2016727620634846) internal successors, (142675), 64803 states have internal predecessors, (142675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 142675 transitions. [2021-06-05 05:06:31,700 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 142675 transitions. Word has length 66 [2021-06-05 05:06:31,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:31,700 INFO L482 AbstractCegarLoop]: Abstraction has 64804 states and 142675 transitions. [2021-06-05 05:06:31,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:31,700 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 142675 transitions. [2021-06-05 05:06:31,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:31,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:31,736 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:31,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 05:06:31,936 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:31,937 INFO L82 PathProgramCache]: Analyzing trace with hash 47459948, now seen corresponding path program 91 times [2021-06-05 05:06:31,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:31,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338088112] [2021-06-05 05:06:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 51 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:31,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:31,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338088112] [2021-06-05 05:06:31,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338088112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:31,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403005998] [2021-06-05 05:06:31,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:32,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:06:32,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 44 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 05:06:32,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403005998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:32,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:32,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 05:06:32,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749668112] [2021-06-05 05:06:32,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:06:32,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:32,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:06:32,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:06:32,118 INFO L87 Difference]: Start difference. First operand 64804 states and 142675 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:32,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:32,368 INFO L93 Difference]: Finished difference Result 71842 states and 157251 transitions. [2021-06-05 05:06:32,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:06:32,369 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:32,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:32,445 INFO L225 Difference]: With dead ends: 71842 [2021-06-05 05:06:32,445 INFO L226 Difference]: Without dead ends: 71794 [2021-06-05 05:06:32,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:32,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71794 states. [2021-06-05 05:06:33,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71794 to 64804. [2021-06-05 05:06:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64804 states, 64803 states have (on average 2.2010555066895052) internal successors, (142635), 64803 states have internal predecessors, (142635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:33,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 142635 transitions. [2021-06-05 05:06:33,590 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 142635 transitions. Word has length 66 [2021-06-05 05:06:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:33,590 INFO L482 AbstractCegarLoop]: Abstraction has 64804 states and 142635 transitions. [2021-06-05 05:06:33,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:33,590 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 142635 transitions. [2021-06-05 05:06:33,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:33,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:33,626 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:33,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:33,826 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:33,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:33,827 INFO L82 PathProgramCache]: Analyzing trace with hash -442650298, now seen corresponding path program 92 times [2021-06-05 05:06:33,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:33,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208366308] [2021-06-05 05:06:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 52 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:33,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:33,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208366308] [2021-06-05 05:06:33,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208366308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:33,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774951125] [2021-06-05 05:06:33,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:33,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:33,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:33,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:06:33,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 64 proven. 52 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 05:06:34,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774951125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:34,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:34,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-06-05 05:06:34,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000879685] [2021-06-05 05:06:34,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:06:34,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:34,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:06:34,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:06:34,007 INFO L87 Difference]: Start difference. First operand 64804 states and 142635 transitions. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:34,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:34,276 INFO L93 Difference]: Finished difference Result 72032 states and 157512 transitions. [2021-06-05 05:06:34,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:06:34,277 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:34,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:34,360 INFO L225 Difference]: With dead ends: 72032 [2021-06-05 05:06:34,360 INFO L226 Difference]: Without dead ends: 71944 [2021-06-05 05:06:34,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71944 states. [2021-06-05 05:06:35,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71944 to 66864. [2021-06-05 05:06:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66864 states, 66863 states have (on average 2.2050910069844307) internal successors, (147439), 66863 states have internal predecessors, (147439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66864 states to 66864 states and 147439 transitions. [2021-06-05 05:06:35,900 INFO L78 Accepts]: Start accepts. Automaton has 66864 states and 147439 transitions. Word has length 66 [2021-06-05 05:06:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:35,900 INFO L482 AbstractCegarLoop]: Abstraction has 66864 states and 147439 transitions. [2021-06-05 05:06:35,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 66864 states and 147439 transitions. [2021-06-05 05:06:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:06:35,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:35,936 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:36,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 05:06:36,138 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:36,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:36,138 INFO L82 PathProgramCache]: Analyzing trace with hash 361914028, now seen corresponding path program 93 times [2021-06-05 05:06:36,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:36,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845069227] [2021-06-05 05:06:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 62 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:36,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:36,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845069227] [2021-06-05 05:06:36,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845069227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:36,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712585386] [2021-06-05 05:06:36,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:36,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:06:36,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:36,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:06:36,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 05:06:36,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712585386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:36,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:36,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-06-05 05:06:36,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195219522] [2021-06-05 05:06:36,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:06:36,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:36,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:06:36,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:06:36,382 INFO L87 Difference]: Start difference. First operand 66864 states and 147439 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:38,052 INFO L93 Difference]: Finished difference Result 139029 states and 299640 transitions. [2021-06-05 05:06:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 05:06:38,057 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:06:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:38,497 INFO L225 Difference]: With dead ends: 139029 [2021-06-05 05:06:38,497 INFO L226 Difference]: Without dead ends: 138261 [2021-06-05 05:06:38,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3539 ImplicationChecksByTransitivity, 905.8ms TimeCoverageRelationStatistics Valid=961, Invalid=9139, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 05:06:38,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138261 states. [2021-06-05 05:06:39,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138261 to 102720. [2021-06-05 05:06:40,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102720 states, 102719 states have (on average 2.1767637924824035) internal successors, (223595), 102719 states have internal predecessors, (223595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102720 states to 102720 states and 223595 transitions. [2021-06-05 05:06:40,203 INFO L78 Accepts]: Start accepts. Automaton has 102720 states and 223595 transitions. Word has length 66 [2021-06-05 05:06:40,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:40,203 INFO L482 AbstractCegarLoop]: Abstraction has 102720 states and 223595 transitions. [2021-06-05 05:06:40,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:40,203 INFO L276 IsEmpty]: Start isEmpty. Operand 102720 states and 223595 transitions. [2021-06-05 05:06:40,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:06:40,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:40,271 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:40,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:40,471 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:40,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:40,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2025977669, now seen corresponding path program 94 times [2021-06-05 05:06:40,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:40,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255321658] [2021-06-05 05:06:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:40,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:40,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255321658] [2021-06-05 05:06:40,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255321658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:40,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387887425] [2021-06-05 05:06:40,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:40,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:40,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:40,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:06:40,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:40,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387887425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:40,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:40,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 05:06:40,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946803519] [2021-06-05 05:06:40,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:06:40,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:40,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:06:40,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:06:40,700 INFO L87 Difference]: Start difference. First operand 102720 states and 223595 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:41,896 INFO L93 Difference]: Finished difference Result 133769 states and 293050 transitions. [2021-06-05 05:06:41,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:06:41,896 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:06:41,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:42,089 INFO L225 Difference]: With dead ends: 133769 [2021-06-05 05:06:42,090 INFO L226 Difference]: Without dead ends: 133551 [2021-06-05 05:06:42,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 181.5ms TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:06:42,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133551 states. [2021-06-05 05:06:43,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133551 to 130358. [2021-06-05 05:06:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130358 states, 130357 states have (on average 2.1991991224099974) internal successors, (286681), 130357 states have internal predecessors, (286681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130358 states to 130358 states and 286681 transitions. [2021-06-05 05:06:44,497 INFO L78 Accepts]: Start accepts. Automaton has 130358 states and 286681 transitions. Word has length 76 [2021-06-05 05:06:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:44,497 INFO L482 AbstractCegarLoop]: Abstraction has 130358 states and 286681 transitions. [2021-06-05 05:06:44,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:44,497 INFO L276 IsEmpty]: Start isEmpty. Operand 130358 states and 286681 transitions. [2021-06-05 05:06:44,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:06:44,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:44,567 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:44,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 05:06:44,769 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:44,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:44,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1940313489, now seen corresponding path program 95 times [2021-06-05 05:06:44,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:44,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635511855] [2021-06-05 05:06:44,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:44,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:44,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635511855] [2021-06-05 05:06:44,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635511855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:44,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531675651] [2021-06-05 05:06:44,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:44,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:06:44,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:44,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:06:44,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:44,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531675651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:44,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:44,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:06:44,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442599282] [2021-06-05 05:06:44,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:06:44,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:44,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:06:44,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:06:44,940 INFO L87 Difference]: Start difference. First operand 130358 states and 286681 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:45,330 INFO L93 Difference]: Finished difference Result 133389 states and 291682 transitions. [2021-06-05 05:06:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:06:45,330 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:06:45,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:45,482 INFO L225 Difference]: With dead ends: 133389 [2021-06-05 05:06:45,482 INFO L226 Difference]: Without dead ends: 133389 [2021-06-05 05:06:45,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:45,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133389 states. [2021-06-05 05:06:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133389 to 125674. [2021-06-05 05:06:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125674 states, 125673 states have (on average 2.193892085014283) internal successors, (275713), 125673 states have internal predecessors, (275713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125674 states to 125674 states and 275713 transitions. [2021-06-05 05:06:47,669 INFO L78 Accepts]: Start accepts. Automaton has 125674 states and 275713 transitions. Word has length 76 [2021-06-05 05:06:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:47,669 INFO L482 AbstractCegarLoop]: Abstraction has 125674 states and 275713 transitions. [2021-06-05 05:06:47,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 125674 states and 275713 transitions. [2021-06-05 05:06:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:06:47,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:47,743 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:47,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:47,944 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:47,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:47,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1246228997, now seen corresponding path program 96 times [2021-06-05 05:06:47,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:47,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533025959] [2021-06-05 05:06:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:47,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:47,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533025959] [2021-06-05 05:06:47,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533025959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:47,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004138103] [2021-06-05 05:06:47,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:48,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:06:48,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:48,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:06:48,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:48,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004138103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:48,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:48,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:06:48,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703513727] [2021-06-05 05:06:48,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:06:48,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:48,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:06:48,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:06:48,106 INFO L87 Difference]: Start difference. First operand 125674 states and 275713 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:48,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:48,537 INFO L93 Difference]: Finished difference Result 131872 states and 288047 transitions. [2021-06-05 05:06:48,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:06:48,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:06:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:48,697 INFO L225 Difference]: With dead ends: 131872 [2021-06-05 05:06:48,697 INFO L226 Difference]: Without dead ends: 131866 [2021-06-05 05:06:48,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131866 states. [2021-06-05 05:06:50,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131866 to 128726. [2021-06-05 05:06:50,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128726 states, 128725 states have (on average 2.197374247426685) internal successors, (282857), 128725 states have internal predecessors, (282857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128726 states to 128726 states and 282857 transitions. [2021-06-05 05:06:51,007 INFO L78 Accepts]: Start accepts. Automaton has 128726 states and 282857 transitions. Word has length 76 [2021-06-05 05:06:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:51,008 INFO L482 AbstractCegarLoop]: Abstraction has 128726 states and 282857 transitions. [2021-06-05 05:06:51,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:51,008 INFO L276 IsEmpty]: Start isEmpty. Operand 128726 states and 282857 transitions. [2021-06-05 05:06:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:06:51,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:51,085 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:51,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:51,294 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:51,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:51,295 INFO L82 PathProgramCache]: Analyzing trace with hash -941503377, now seen corresponding path program 97 times [2021-06-05 05:06:51,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:51,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241951230] [2021-06-05 05:06:51,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 83 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:51,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:51,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241951230] [2021-06-05 05:06:51,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241951230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:51,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739989216] [2021-06-05 05:06:51,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:51,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:06:51,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 83 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:51,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739989216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:51,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:51,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:06:51,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000846380] [2021-06-05 05:06:51,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:06:51,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:51,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:06:51,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:06:51,870 INFO L87 Difference]: Start difference. First operand 128726 states and 282857 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:52,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:52,322 INFO L93 Difference]: Finished difference Result 134932 states and 294145 transitions. [2021-06-05 05:06:52,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:06:52,322 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:06:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:52,479 INFO L225 Difference]: With dead ends: 134932 [2021-06-05 05:06:52,479 INFO L226 Difference]: Without dead ends: 134930 [2021-06-05 05:06:52,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 458.2ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134930 states. [2021-06-05 05:06:54,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134930 to 128702. [2021-06-05 05:06:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128702 states, 128701 states have (on average 2.1954841065725983) internal successors, (282561), 128701 states have internal predecessors, (282561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:54,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128702 states to 128702 states and 282561 transitions. [2021-06-05 05:06:54,819 INFO L78 Accepts]: Start accepts. Automaton has 128702 states and 282561 transitions. Word has length 76 [2021-06-05 05:06:54,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:54,820 INFO L482 AbstractCegarLoop]: Abstraction has 128702 states and 282561 transitions. [2021-06-05 05:06:54,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:54,820 INFO L276 IsEmpty]: Start isEmpty. Operand 128702 states and 282561 transitions. [2021-06-05 05:06:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:06:54,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:54,893 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:55,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 05:06:55,094 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:55,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:55,094 INFO L82 PathProgramCache]: Analyzing trace with hash -551299451, now seen corresponding path program 98 times [2021-06-05 05:06:55,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:55,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248172300] [2021-06-05 05:06:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:55,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:55,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248172300] [2021-06-05 05:06:55,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248172300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:55,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816281679] [2021-06-05 05:06:55,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:55,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:55,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:55,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:06:55,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:55,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816281679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:55,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:55,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 05:06:55,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468756043] [2021-06-05 05:06:55,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:06:55,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:55,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:06:55,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:06:55,291 INFO L87 Difference]: Start difference. First operand 128702 states and 282561 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:55,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:55,761 INFO L93 Difference]: Finished difference Result 134144 states and 292817 transitions. [2021-06-05 05:06:55,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:06:55,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:06:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:55,918 INFO L225 Difference]: With dead ends: 134144 [2021-06-05 05:06:55,918 INFO L226 Difference]: Without dead ends: 134142 [2021-06-05 05:06:55,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:56,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134142 states. [2021-06-05 05:06:58,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134142 to 128026. [2021-06-05 05:06:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128026 states, 128025 states have (on average 2.1946260495996874) internal successors, (280967), 128025 states have internal predecessors, (280967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128026 states to 128026 states and 280967 transitions. [2021-06-05 05:06:58,328 INFO L78 Accepts]: Start accepts. Automaton has 128026 states and 280967 transitions. Word has length 76 [2021-06-05 05:06:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:58,328 INFO L482 AbstractCegarLoop]: Abstraction has 128026 states and 280967 transitions. [2021-06-05 05:06:58,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:58,328 INFO L276 IsEmpty]: Start isEmpty. Operand 128026 states and 280967 transitions. [2021-06-05 05:06:58,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:06:58,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:58,404 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:58,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:58,605 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:58,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1583115929, now seen corresponding path program 99 times [2021-06-05 05:06:58,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:58,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840906938] [2021-06-05 05:06:58,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:06:58,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:58,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840906938] [2021-06-05 05:06:58,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840906938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:58,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401101581] [2021-06-05 05:06:58,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:58,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:06:58,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:58,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:06:58,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:06:58,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401101581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:58,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:58,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:06:58,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041960673] [2021-06-05 05:06:58,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:06:58,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:58,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:06:58,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:06:58,777 INFO L87 Difference]: Start difference. First operand 128026 states and 280967 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:59,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:59,621 INFO L93 Difference]: Finished difference Result 134843 states and 294803 transitions. [2021-06-05 05:06:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:06:59,622 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:06:59,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:59,788 INFO L225 Difference]: With dead ends: 134843 [2021-06-05 05:06:59,788 INFO L226 Difference]: Without dead ends: 134807 [2021-06-05 05:06:59,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:59,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134807 states. [2021-06-05 05:07:01,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134807 to 131862. [2021-06-05 05:07:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131862 states, 131861 states have (on average 2.1977916138964515) internal successors, (289803), 131861 states have internal predecessors, (289803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131862 states to 131862 states and 289803 transitions. [2021-06-05 05:07:02,139 INFO L78 Accepts]: Start accepts. Automaton has 131862 states and 289803 transitions. Word has length 76 [2021-06-05 05:07:02,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:02,139 INFO L482 AbstractCegarLoop]: Abstraction has 131862 states and 289803 transitions. [2021-06-05 05:07:02,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 131862 states and 289803 transitions. [2021-06-05 05:07:02,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:07:02,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:02,211 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:02,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:02,412 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:02,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:02,412 INFO L82 PathProgramCache]: Analyzing trace with hash 128207611, now seen corresponding path program 100 times [2021-06-05 05:07:02,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:02,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918314184] [2021-06-05 05:07:02,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:02,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:02,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918314184] [2021-06-05 05:07:02,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918314184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:02,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393343090] [2021-06-05 05:07:02,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:02,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:02,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:02,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:07:02,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:02,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393343090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:02,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:02,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:07:02,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718869109] [2021-06-05 05:07:02,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:07:02,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:02,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:07:02,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:07:02,593 INFO L87 Difference]: Start difference. First operand 131862 states and 289803 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:03,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:03,030 INFO L93 Difference]: Finished difference Result 138462 states and 302796 transitions. [2021-06-05 05:07:03,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:07:03,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:07:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:03,192 INFO L225 Difference]: With dead ends: 138462 [2021-06-05 05:07:03,192 INFO L226 Difference]: Without dead ends: 138426 [2021-06-05 05:07:03,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:03,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138426 states. [2021-06-05 05:07:05,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138426 to 131338. [2021-06-05 05:07:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131338 states, 131337 states have (on average 2.1961747260863276) internal successors, (288439), 131337 states have internal predecessors, (288439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:05,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131338 states to 131338 states and 288439 transitions. [2021-06-05 05:07:05,445 INFO L78 Accepts]: Start accepts. Automaton has 131338 states and 288439 transitions. Word has length 76 [2021-06-05 05:07:05,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:05,445 INFO L482 AbstractCegarLoop]: Abstraction has 131338 states and 288439 transitions. [2021-06-05 05:07:05,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:05,446 INFO L276 IsEmpty]: Start isEmpty. Operand 131338 states and 288439 transitions. [2021-06-05 05:07:05,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:07:05,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:05,525 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:05,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 05:07:05,725 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:05,725 INFO L82 PathProgramCache]: Analyzing trace with hash 432933231, now seen corresponding path program 101 times [2021-06-05 05:07:05,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:05,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305429331] [2021-06-05 05:07:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:05,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:05,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305429331] [2021-06-05 05:07:05,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305429331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:05,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196201757] [2021-06-05 05:07:05,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:05,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:07:05,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:05,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:07:05,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:05,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196201757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:05,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:05,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:07:05,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727069856] [2021-06-05 05:07:05,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:07:05,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:05,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:07:05,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:07:05,913 INFO L87 Difference]: Start difference. First operand 131338 states and 288439 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:06,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:06,817 INFO L93 Difference]: Finished difference Result 140394 states and 305750 transitions. [2021-06-05 05:07:06,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:07:06,817 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:07:06,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:07,038 INFO L225 Difference]: With dead ends: 140394 [2021-06-05 05:07:07,038 INFO L226 Difference]: Without dead ends: 140392 [2021-06-05 05:07:07,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:07,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140392 states. [2021-06-05 05:07:08,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140392 to 131550. [2021-06-05 05:07:09,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131550 states, 131549 states have (on average 2.1950679974762255) internal successors, (288759), 131549 states have internal predecessors, (288759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:09,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131550 states to 131550 states and 288759 transitions. [2021-06-05 05:07:09,696 INFO L78 Accepts]: Start accepts. Automaton has 131550 states and 288759 transitions. Word has length 76 [2021-06-05 05:07:09,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:09,696 INFO L482 AbstractCegarLoop]: Abstraction has 131550 states and 288759 transitions. [2021-06-05 05:07:09,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:09,696 INFO L276 IsEmpty]: Start isEmpty. Operand 131550 states and 288759 transitions. [2021-06-05 05:07:09,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:07:09,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:09,805 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:10,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 05:07:10,006 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:10,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:10,006 INFO L82 PathProgramCache]: Analyzing trace with hash 823137157, now seen corresponding path program 102 times [2021-06-05 05:07:10,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:10,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81492079] [2021-06-05 05:07:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:10,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:10,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81492079] [2021-06-05 05:07:10,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81492079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:10,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148152882] [2021-06-05 05:07:10,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:10,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:07:10,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:10,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:07:10,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:10,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148152882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:10,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:10,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 05:07:10,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056192104] [2021-06-05 05:07:10,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:07:10,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:10,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:07:10,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:07:10,290 INFO L87 Difference]: Start difference. First operand 131550 states and 288759 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:10,893 INFO L93 Difference]: Finished difference Result 148818 states and 323300 transitions. [2021-06-05 05:07:10,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:07:10,893 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:07:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:11,110 INFO L225 Difference]: With dead ends: 148818 [2021-06-05 05:07:11,110 INFO L226 Difference]: Without dead ends: 148800 [2021-06-05 05:07:11,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:07:11,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148800 states. [2021-06-05 05:07:14,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148800 to 131506. [2021-06-05 05:07:14,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131506 states, 131505 states have (on average 2.19297365119197) internal successors, (288387), 131505 states have internal predecessors, (288387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131506 states to 131506 states and 288387 transitions. [2021-06-05 05:07:14,617 INFO L78 Accepts]: Start accepts. Automaton has 131506 states and 288387 transitions. Word has length 76 [2021-06-05 05:07:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:14,617 INFO L482 AbstractCegarLoop]: Abstraction has 131506 states and 288387 transitions. [2021-06-05 05:07:14,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 131506 states and 288387 transitions. [2021-06-05 05:07:14,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:07:14,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:14,714 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:14,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 05:07:14,936 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:14,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:14,936 INFO L82 PathProgramCache]: Analyzing trace with hash -2018965209, now seen corresponding path program 103 times [2021-06-05 05:07:14,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:14,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882110156] [2021-06-05 05:07:14,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:15,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:15,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882110156] [2021-06-05 05:07:15,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882110156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:15,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578973621] [2021-06-05 05:07:15,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:15,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:07:15,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:15,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578973621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:15,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:15,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:07:15,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120865062] [2021-06-05 05:07:15,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:07:15,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:15,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:07:15,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:07:15,155 INFO L87 Difference]: Start difference. First operand 131506 states and 288387 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:16,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:16,078 INFO L93 Difference]: Finished difference Result 138086 states and 301358 transitions. [2021-06-05 05:07:16,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:07:16,079 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:07:16,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:16,276 INFO L225 Difference]: With dead ends: 138086 [2021-06-05 05:07:16,276 INFO L226 Difference]: Without dead ends: 138068 [2021-06-05 05:07:16,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:07:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138068 states. [2021-06-05 05:07:17,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138068 to 129102. [2021-06-05 05:07:17,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129102 states, 129101 states have (on average 2.1923222902998427) internal successors, (283031), 129101 states have internal predecessors, (283031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:18,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129102 states to 129102 states and 283031 transitions. [2021-06-05 05:07:18,105 INFO L78 Accepts]: Start accepts. Automaton has 129102 states and 283031 transitions. Word has length 76 [2021-06-05 05:07:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:18,105 INFO L482 AbstractCegarLoop]: Abstraction has 129102 states and 283031 transitions. [2021-06-05 05:07:18,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand 129102 states and 283031 transitions. [2021-06-05 05:07:18,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:07:18,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:18,184 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:18,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:18,385 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:18,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:18,385 INFO L82 PathProgramCache]: Analyzing trace with hash 974502341, now seen corresponding path program 104 times [2021-06-05 05:07:18,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:18,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342097318] [2021-06-05 05:07:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:07:18,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:18,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342097318] [2021-06-05 05:07:18,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342097318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:18,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668641543] [2021-06-05 05:07:18,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:18,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:18,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:18,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:07:18,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:07:18,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668641543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:18,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:18,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:07:18,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392205726] [2021-06-05 05:07:18,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:07:18,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:18,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:07:18,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:07:18,589 INFO L87 Difference]: Start difference. First operand 129102 states and 283031 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:19,441 INFO L93 Difference]: Finished difference Result 135547 states and 296050 transitions. [2021-06-05 05:07:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:07:19,442 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:07:19,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:19,601 INFO L225 Difference]: With dead ends: 135547 [2021-06-05 05:07:19,601 INFO L226 Difference]: Without dead ends: 135511 [2021-06-05 05:07:19,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135511 states. [2021-06-05 05:07:21,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135511 to 132734. [2021-06-05 05:07:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132734 states, 132733 states have (on average 2.194322436771564) internal successors, (291259), 132733 states have internal predecessors, (291259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:21,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132734 states to 132734 states and 291259 transitions. [2021-06-05 05:07:21,921 INFO L78 Accepts]: Start accepts. Automaton has 132734 states and 291259 transitions. Word has length 76 [2021-06-05 05:07:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:21,921 INFO L482 AbstractCegarLoop]: Abstraction has 132734 states and 291259 transitions. [2021-06-05 05:07:21,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:21,921 INFO L276 IsEmpty]: Start isEmpty. Operand 132734 states and 291259 transitions. [2021-06-05 05:07:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:07:21,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:21,993 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:22,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 05:07:22,194 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:22,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:22,194 INFO L82 PathProgramCache]: Analyzing trace with hash -14993925, now seen corresponding path program 105 times [2021-06-05 05:07:22,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:22,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775590656] [2021-06-05 05:07:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:22,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:22,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775590656] [2021-06-05 05:07:22,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775590656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:22,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689279988] [2021-06-05 05:07:22,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:22,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 05:07:22,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:22,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:07:22,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:22,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689279988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:22,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:22,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:07:22,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605888232] [2021-06-05 05:07:22,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:07:22,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:22,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:07:22,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:07:22,392 INFO L87 Difference]: Start difference. First operand 132734 states and 291259 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:22,837 INFO L93 Difference]: Finished difference Result 139258 states and 304121 transitions. [2021-06-05 05:07:22,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:07:22,837 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:07:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:23,003 INFO L225 Difference]: With dead ends: 139258 [2021-06-05 05:07:23,003 INFO L226 Difference]: Without dead ends: 139216 [2021-06-05 05:07:23,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:23,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139216 states. [2021-06-05 05:07:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139216 to 132450. [2021-06-05 05:07:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132450 states, 132449 states have (on average 2.193168691345348) internal successors, (290483), 132449 states have internal predecessors, (290483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:25,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132450 states to 132450 states and 290483 transitions. [2021-06-05 05:07:25,259 INFO L78 Accepts]: Start accepts. Automaton has 132450 states and 290483 transitions. Word has length 76 [2021-06-05 05:07:25,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:25,259 INFO L482 AbstractCegarLoop]: Abstraction has 132450 states and 290483 transitions. [2021-06-05 05:07:25,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:25,259 INFO L276 IsEmpty]: Start isEmpty. Operand 132450 states and 290483 transitions. [2021-06-05 05:07:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:07:25,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:25,333 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:25,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 05:07:25,534 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:25,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:25,534 INFO L82 PathProgramCache]: Analyzing trace with hash 289731695, now seen corresponding path program 106 times [2021-06-05 05:07:25,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:25,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885896829] [2021-06-05 05:07:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:25,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:25,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885896829] [2021-06-05 05:07:25,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885896829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:25,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761155927] [2021-06-05 05:07:25,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:25,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:25,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:25,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:07:25,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:25,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761155927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:25,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:25,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:07:25,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660759601] [2021-06-05 05:07:25,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:07:25,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:25,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:07:25,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:07:25,709 INFO L87 Difference]: Start difference. First operand 132450 states and 290483 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:26,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:26,635 INFO L93 Difference]: Finished difference Result 142694 states and 310513 transitions. [2021-06-05 05:07:26,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:07:26,636 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:07:26,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:26,800 INFO L225 Difference]: With dead ends: 142694 [2021-06-05 05:07:26,800 INFO L226 Difference]: Without dead ends: 142692 [2021-06-05 05:07:26,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:26,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142692 states. [2021-06-05 05:07:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142692 to 132698. [2021-06-05 05:07:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132698 states, 132697 states have (on average 2.1928076746271583) internal successors, (290979), 132697 states have internal predecessors, (290979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132698 states to 132698 states and 290979 transitions. [2021-06-05 05:07:29,210 INFO L78 Accepts]: Start accepts. Automaton has 132698 states and 290979 transitions. Word has length 76 [2021-06-05 05:07:29,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:29,210 INFO L482 AbstractCegarLoop]: Abstraction has 132698 states and 290979 transitions. [2021-06-05 05:07:29,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:29,210 INFO L276 IsEmpty]: Start isEmpty. Operand 132698 states and 290979 transitions. [2021-06-05 05:07:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:07:29,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:29,279 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:29,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 05:07:29,480 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:29,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:29,480 INFO L82 PathProgramCache]: Analyzing trace with hash 679935621, now seen corresponding path program 107 times [2021-06-05 05:07:29,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:29,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812298145] [2021-06-05 05:07:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:29,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:29,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812298145] [2021-06-05 05:07:29,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812298145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:29,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697469373] [2021-06-05 05:07:29,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:29,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:07:29,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:29,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:07:29,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:29,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697469373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:29,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:29,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 05:07:29,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905174314] [2021-06-05 05:07:29,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:07:29,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:29,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:07:29,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:07:29,660 INFO L87 Difference]: Start difference. First operand 132698 states and 290979 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:30,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:30,122 INFO L93 Difference]: Finished difference Result 159426 states and 345883 transitions. [2021-06-05 05:07:30,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:07:30,122 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:07:30,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:30,312 INFO L225 Difference]: With dead ends: 159426 [2021-06-05 05:07:30,312 INFO L226 Difference]: Without dead ends: 159408 [2021-06-05 05:07:30,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:07:30,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159408 states. [2021-06-05 05:07:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159408 to 133538. [2021-06-05 05:07:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133538 states, 133537 states have (on average 2.1909957539857867) internal successors, (292579), 133537 states have internal predecessors, (292579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133538 states to 133538 states and 292579 transitions. [2021-06-05 05:07:32,632 INFO L78 Accepts]: Start accepts. Automaton has 133538 states and 292579 transitions. Word has length 76 [2021-06-05 05:07:32,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:32,632 INFO L482 AbstractCegarLoop]: Abstraction has 133538 states and 292579 transitions. [2021-06-05 05:07:32,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 133538 states and 292579 transitions. [2021-06-05 05:07:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:07:32,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:32,707 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:32,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:32,908 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:32,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:32,908 INFO L82 PathProgramCache]: Analyzing trace with hash 2132800551, now seen corresponding path program 108 times [2021-06-05 05:07:32,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:32,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325111901] [2021-06-05 05:07:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:32,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:32,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325111901] [2021-06-05 05:07:32,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325111901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:32,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54228112] [2021-06-05 05:07:32,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:32,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 05:07:32,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:32,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:07:32,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:33,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54228112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:33,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:33,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:07:33,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93382315] [2021-06-05 05:07:33,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:07:33,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:33,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:07:33,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:07:33,080 INFO L87 Difference]: Start difference. First operand 133538 states and 292579 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:34,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:34,130 INFO L93 Difference]: Finished difference Result 154174 states and 334665 transitions. [2021-06-05 05:07:34,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:07:34,131 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:07:34,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:34,303 INFO L225 Difference]: With dead ends: 154174 [2021-06-05 05:07:34,303 INFO L226 Difference]: Without dead ends: 154136 [2021-06-05 05:07:34,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:07:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154136 states. [2021-06-05 05:07:35,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154136 to 133478. [2021-06-05 05:07:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133478 states, 133477 states have (on average 2.1892535792683385) internal successors, (292215), 133477 states have internal predecessors, (292215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133478 states to 133478 states and 292215 transitions. [2021-06-05 05:07:36,784 INFO L78 Accepts]: Start accepts. Automaton has 133478 states and 292215 transitions. Word has length 76 [2021-06-05 05:07:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:36,785 INFO L482 AbstractCegarLoop]: Abstraction has 133478 states and 292215 transitions. [2021-06-05 05:07:36,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:36,785 INFO L276 IsEmpty]: Start isEmpty. Operand 133478 states and 292215 transitions. [2021-06-05 05:07:36,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:07:36,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:36,860 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:37,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:37,061 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:37,061 INFO L82 PathProgramCache]: Analyzing trace with hash 271329285, now seen corresponding path program 109 times [2021-06-05 05:07:37,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:37,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137486101] [2021-06-05 05:07:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:37,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:37,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137486101] [2021-06-05 05:07:37,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137486101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:37,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661714576] [2021-06-05 05:07:37,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:37,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:07:37,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:37,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661714576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:37,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:37,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 05:07:37,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776438830] [2021-06-05 05:07:37,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:07:37,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:37,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:07:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:07:37,244 INFO L87 Difference]: Start difference. First operand 133478 states and 292215 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:37,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:37,722 INFO L93 Difference]: Finished difference Result 139982 states and 305517 transitions. [2021-06-05 05:07:37,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:07:37,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:07:37,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:37,896 INFO L225 Difference]: With dead ends: 139982 [2021-06-05 05:07:37,896 INFO L226 Difference]: Without dead ends: 139944 [2021-06-05 05:07:37,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:07:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139944 states. [2021-06-05 05:07:39,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139944 to 129634. [2021-06-05 05:07:39,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129634 states, 129633 states have (on average 2.1887250931475783) internal successors, (283731), 129633 states have internal predecessors, (283731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129634 states to 129634 states and 283731 transitions. [2021-06-05 05:07:40,121 INFO L78 Accepts]: Start accepts. Automaton has 129634 states and 283731 transitions. Word has length 76 [2021-06-05 05:07:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:40,122 INFO L482 AbstractCegarLoop]: Abstraction has 129634 states and 283731 transitions. [2021-06-05 05:07:40,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:40,122 INFO L276 IsEmpty]: Start isEmpty. Operand 129634 states and 283731 transitions. [2021-06-05 05:07:40,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:07:40,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:40,194 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:40,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:40,395 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:40,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:40,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1903347815, now seen corresponding path program 110 times [2021-06-05 05:07:40,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:40,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143314602] [2021-06-05 05:07:40,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:07:40,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:40,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143314602] [2021-06-05 05:07:40,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143314602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:40,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792967512] [2021-06-05 05:07:40,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:40,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:40,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:40,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:07:40,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:07:40,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792967512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:40,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:40,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:07:40,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277585505] [2021-06-05 05:07:40,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:07:40,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:40,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:07:40,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:07:40,563 INFO L87 Difference]: Start difference. First operand 129634 states and 283731 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:40,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:40,971 INFO L93 Difference]: Finished difference Result 135321 states and 295193 transitions. [2021-06-05 05:07:40,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:07:40,971 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:07:40,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:41,825 INFO L225 Difference]: With dead ends: 135321 [2021-06-05 05:07:41,825 INFO L226 Difference]: Without dead ends: 135249 [2021-06-05 05:07:41,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:41,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135249 states. [2021-06-05 05:07:43,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135249 to 123270. [2021-06-05 05:07:43,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123270 states, 123269 states have (on average 2.185910488443972) internal successors, (269455), 123269 states have internal predecessors, (269455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:43,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123270 states to 123270 states and 269455 transitions. [2021-06-05 05:07:43,643 INFO L78 Accepts]: Start accepts. Automaton has 123270 states and 269455 transitions. Word has length 76 [2021-06-05 05:07:43,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:43,643 INFO L482 AbstractCegarLoop]: Abstraction has 123270 states and 269455 transitions. [2021-06-05 05:07:43,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:43,644 INFO L276 IsEmpty]: Start isEmpty. Operand 123270 states and 269455 transitions. [2021-06-05 05:07:43,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:07:43,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:43,720 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:43,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 05:07:43,920 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:43,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1486828283, now seen corresponding path program 111 times [2021-06-05 05:07:43,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:43,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664919102] [2021-06-05 05:07:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:43,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:43,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664919102] [2021-06-05 05:07:43,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664919102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:43,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493335348] [2021-06-05 05:07:43,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:43,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 05:07:43,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:43,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:07:43,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:44,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493335348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:44,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:44,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:07:44,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909090797] [2021-06-05 05:07:44,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:07:44,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:44,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:07:44,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:07:44,080 INFO L87 Difference]: Start difference. First operand 123270 states and 269455 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:44,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:44,475 INFO L93 Difference]: Finished difference Result 128955 states and 280766 transitions. [2021-06-05 05:07:44,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:07:44,475 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:07:44,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:45,079 INFO L225 Difference]: With dead ends: 128955 [2021-06-05 05:07:45,079 INFO L226 Difference]: Without dead ends: 128913 [2021-06-05 05:07:45,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:45,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128913 states. [2021-06-05 05:07:46,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128913 to 122990. [2021-06-05 05:07:46,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122990 states, 122989 states have (on average 2.185553179552643) internal successors, (268799), 122989 states have internal predecessors, (268799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122990 states to 122990 states and 268799 transitions. [2021-06-05 05:07:46,792 INFO L78 Accepts]: Start accepts. Automaton has 122990 states and 268799 transitions. Word has length 76 [2021-06-05 05:07:46,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:46,792 INFO L482 AbstractCegarLoop]: Abstraction has 122990 states and 268799 transitions. [2021-06-05 05:07:46,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 122990 states and 268799 transitions. [2021-06-05 05:07:46,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:07:46,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:46,868 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:47,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 05:07:47,069 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:47,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:47,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1791553903, now seen corresponding path program 112 times [2021-06-05 05:07:47,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:47,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819688178] [2021-06-05 05:07:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 114 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:47,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:47,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819688178] [2021-06-05 05:07:47,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819688178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:47,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871135426] [2021-06-05 05:07:47,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:47,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:47,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:47,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:07:47,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 114 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:47,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871135426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:47,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:47,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:07:47,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76103616] [2021-06-05 05:07:47,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:07:47,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:47,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:07:47,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:07:47,255 INFO L87 Difference]: Start difference. First operand 122990 states and 268799 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:48,063 INFO L93 Difference]: Finished difference Result 130997 states and 284211 transitions. [2021-06-05 05:07:48,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:07:48,063 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:07:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:48,250 INFO L225 Difference]: With dead ends: 130997 [2021-06-05 05:07:48,250 INFO L226 Difference]: Without dead ends: 130997 [2021-06-05 05:07:48,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:48,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130997 states. [2021-06-05 05:07:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130997 to 123134. [2021-06-05 05:07:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123134 states, 123133 states have (on average 2.1853036960035084) internal successors, (269083), 123133 states have internal predecessors, (269083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123134 states to 123134 states and 269083 transitions. [2021-06-05 05:07:50,003 INFO L78 Accepts]: Start accepts. Automaton has 123134 states and 269083 transitions. Word has length 76 [2021-06-05 05:07:50,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:50,004 INFO L482 AbstractCegarLoop]: Abstraction has 123134 states and 269083 transitions. [2021-06-05 05:07:50,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:50,004 INFO L276 IsEmpty]: Start isEmpty. Operand 123134 states and 269083 transitions. [2021-06-05 05:07:50,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:07:50,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:50,074 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:50,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 05:07:50,277 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:50,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:50,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2113209467, now seen corresponding path program 113 times [2021-06-05 05:07:50,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:50,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377899508] [2021-06-05 05:07:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:50,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:50,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377899508] [2021-06-05 05:07:50,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377899508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:50,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553347383] [2021-06-05 05:07:50,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:50,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 05:07:50,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:50,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:07:50,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:50,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553347383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:50,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:50,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 05:07:50,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877402023] [2021-06-05 05:07:50,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:07:50,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:50,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:07:50,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:07:50,475 INFO L87 Difference]: Start difference. First operand 123134 states and 269083 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:51,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:51,345 INFO L93 Difference]: Finished difference Result 145897 states and 315475 transitions. [2021-06-05 05:07:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:07:51,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:07:51,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:51,509 INFO L225 Difference]: With dead ends: 145897 [2021-06-05 05:07:51,510 INFO L226 Difference]: Without dead ends: 145897 [2021-06-05 05:07:51,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 477.7ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:51,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145897 states. [2021-06-05 05:07:53,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145897 to 123934. [2021-06-05 05:07:53,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123934 states, 123933 states have (on average 2.184720776548619) internal successors, (270759), 123933 states have internal predecessors, (270759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123934 states to 123934 states and 270759 transitions. [2021-06-05 05:07:53,804 INFO L78 Accepts]: Start accepts. Automaton has 123934 states and 270759 transitions. Word has length 76 [2021-06-05 05:07:53,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:53,805 INFO L482 AbstractCegarLoop]: Abstraction has 123934 states and 270759 transitions. [2021-06-05 05:07:53,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 123934 states and 270759 transitions. [2021-06-05 05:07:53,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:07:53,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:53,870 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:54,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 05:07:54,070 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:54,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:54,071 INFO L82 PathProgramCache]: Analyzing trace with hash -660344537, now seen corresponding path program 114 times [2021-06-05 05:07:54,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:54,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534231640] [2021-06-05 05:07:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:54,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:54,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534231640] [2021-06-05 05:07:54,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534231640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:54,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166621818] [2021-06-05 05:07:54,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:54,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 05:07:54,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:54,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:07:54,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:54,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166621818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:54,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:54,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:07:54,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803651765] [2021-06-05 05:07:54,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:07:54,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:54,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:07:54,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:07:54,265 INFO L87 Difference]: Start difference. First operand 123934 states and 270759 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:54,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:54,731 INFO L93 Difference]: Finished difference Result 146309 states and 316555 transitions. [2021-06-05 05:07:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:07:54,732 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:07:54,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:54,906 INFO L225 Difference]: With dead ends: 146309 [2021-06-05 05:07:54,906 INFO L226 Difference]: Without dead ends: 146309 [2021-06-05 05:07:54,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:07:55,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146309 states. [2021-06-05 05:07:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146309 to 124414. [2021-06-05 05:07:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124414 states, 124413 states have (on average 2.1839438000852) internal successors, (271711), 124413 states have internal predecessors, (271711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:57,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124414 states to 124414 states and 271711 transitions. [2021-06-05 05:07:57,098 INFO L78 Accepts]: Start accepts. Automaton has 124414 states and 271711 transitions. Word has length 76 [2021-06-05 05:07:57,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:57,098 INFO L482 AbstractCegarLoop]: Abstraction has 124414 states and 271711 transitions. [2021-06-05 05:07:57,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:57,099 INFO L276 IsEmpty]: Start isEmpty. Operand 124414 states and 271711 transitions. [2021-06-05 05:07:57,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:07:57,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:57,169 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:57,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 05:07:57,371 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:57,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:57,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1773151493, now seen corresponding path program 115 times [2021-06-05 05:07:57,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:57,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137153638] [2021-06-05 05:07:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:57,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:57,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137153638] [2021-06-05 05:07:57,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137153638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:57,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644002394] [2021-06-05 05:07:57,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:57,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:07:57,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:57,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644002394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:57,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:57,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 05:07:57,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244033512] [2021-06-05 05:07:57,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:07:57,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:57,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:07:57,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:07:57,553 INFO L87 Difference]: Start difference. First operand 124414 states and 271711 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:58,039 INFO L93 Difference]: Finished difference Result 138029 states and 299093 transitions. [2021-06-05 05:07:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:07:58,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:07:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:58,205 INFO L225 Difference]: With dead ends: 138029 [2021-06-05 05:07:58,205 INFO L226 Difference]: Without dead ends: 138029 [2021-06-05 05:07:58,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:07:58,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138029 states. [2021-06-05 05:08:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138029 to 123854. [2021-06-05 05:08:00,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123854 states, 123853 states have (on average 2.1827085335034275) internal successors, (270335), 123853 states have internal predecessors, (270335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123854 states to 123854 states and 270335 transitions. [2021-06-05 05:08:00,293 INFO L78 Accepts]: Start accepts. Automaton has 123854 states and 270335 transitions. Word has length 76 [2021-06-05 05:08:00,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:00,293 INFO L482 AbstractCegarLoop]: Abstraction has 123854 states and 270335 transitions. [2021-06-05 05:08:00,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 123854 states and 270335 transitions. [2021-06-05 05:08:00,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:08:00,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:00,365 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:00,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:00,567 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:00,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:00,567 INFO L82 PathProgramCache]: Analyzing trace with hash 2048129063, now seen corresponding path program 116 times [2021-06-05 05:08:00,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:00,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060658394] [2021-06-05 05:08:00,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:00,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:00,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060658394] [2021-06-05 05:08:00,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060658394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:00,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477410305] [2021-06-05 05:08:00,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:00,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:00,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:00,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:08:00,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:00,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477410305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:00,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:00,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 05:08:00,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073311596] [2021-06-05 05:08:00,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:08:00,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:00,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:08:00,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:08:00,757 INFO L87 Difference]: Start difference. First operand 123854 states and 270335 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:01,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:01,643 INFO L93 Difference]: Finished difference Result 128519 states and 279224 transitions. [2021-06-05 05:08:01,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:08:01,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:08:01,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:01,807 INFO L225 Difference]: With dead ends: 128519 [2021-06-05 05:08:01,807 INFO L226 Difference]: Without dead ends: 128519 [2021-06-05 05:08:01,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:08:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128519 states. [2021-06-05 05:08:03,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128519 to 117206. [2021-06-05 05:08:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117206 states, 117205 states have (on average 2.179659570837422) internal successors, (255467), 117205 states have internal predecessors, (255467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117206 states to 117206 states and 255467 transitions. [2021-06-05 05:08:03,460 INFO L78 Accepts]: Start accepts. Automaton has 117206 states and 255467 transitions. Word has length 76 [2021-06-05 05:08:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:03,460 INFO L482 AbstractCegarLoop]: Abstraction has 117206 states and 255467 transitions. [2021-06-05 05:08:03,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 117206 states and 255467 transitions. [2021-06-05 05:08:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:08:03,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:03,534 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:03,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 05:08:03,735 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:03,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:03,735 INFO L82 PathProgramCache]: Analyzing trace with hash -358200709, now seen corresponding path program 117 times [2021-06-05 05:08:03,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:03,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521856519] [2021-06-05 05:08:03,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 05:08:03,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:03,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521856519] [2021-06-05 05:08:03,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521856519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:03,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703890027] [2021-06-05 05:08:03,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:03,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 05:08:03,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:03,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:08:03,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 05:08:03,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703890027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:03,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:03,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 05:08:03,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909294403] [2021-06-05 05:08:03,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:08:03,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:03,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:08:03,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:08:03,915 INFO L87 Difference]: Start difference. First operand 117206 states and 255467 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:04,818 INFO L93 Difference]: Finished difference Result 128191 states and 279004 transitions. [2021-06-05 05:08:04,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:08:04,818 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:08:04,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:04,964 INFO L225 Difference]: With dead ends: 128191 [2021-06-05 05:08:04,964 INFO L226 Difference]: Without dead ends: 128065 [2021-06-05 05:08:04,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:08:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128065 states. [2021-06-05 05:08:06,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128065 to 122126. [2021-06-05 05:08:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.1861780962128967) internal successors, (266987), 122125 states have internal predecessors, (266987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266987 transitions. [2021-06-05 05:08:06,688 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266987 transitions. Word has length 76 [2021-06-05 05:08:06,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:06,688 INFO L482 AbstractCegarLoop]: Abstraction has 122126 states and 266987 transitions. [2021-06-05 05:08:06,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:06,689 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266987 transitions. [2021-06-05 05:08:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:08:06,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:06,758 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:06,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 05:08:06,959 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:06,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:06,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1595890949, now seen corresponding path program 118 times [2021-06-05 05:08:06,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:06,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872290473] [2021-06-05 05:08:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:08:07,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:07,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872290473] [2021-06-05 05:08:07,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872290473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:07,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545181379] [2021-06-05 05:08:07,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:07,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:07,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:07,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:08:07,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:08:07,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545181379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:07,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:07,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:08:07,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161709939] [2021-06-05 05:08:07,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:08:07,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:07,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:08:07,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:08:07,132 INFO L87 Difference]: Start difference. First operand 122126 states and 266987 transitions. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:07,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:07,991 INFO L93 Difference]: Finished difference Result 124343 states and 270490 transitions. [2021-06-05 05:08:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:08:07,992 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:08:07,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:08,142 INFO L225 Difference]: With dead ends: 124343 [2021-06-05 05:08:08,142 INFO L226 Difference]: Without dead ends: 124247 [2021-06-05 05:08:08,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:08:08,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124247 states. [2021-06-05 05:08:09,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124247 to 122126. [2021-06-05 05:08:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.185523029682702) internal successors, (266907), 122125 states have internal predecessors, (266907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266907 transitions. [2021-06-05 05:08:10,431 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266907 transitions. Word has length 76 [2021-06-05 05:08:10,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:10,431 INFO L482 AbstractCegarLoop]: Abstraction has 122126 states and 266907 transitions. [2021-06-05 05:08:10,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266907 transitions. [2021-06-05 05:08:10,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:08:10,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:10,495 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:10,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:10,697 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:10,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:10,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1654539205, now seen corresponding path program 119 times [2021-06-05 05:08:10,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:10,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90074572] [2021-06-05 05:08:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 05:08:10,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:10,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90074572] [2021-06-05 05:08:10,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90074572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:10,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078096728] [2021-06-05 05:08:10,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:10,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 05:08:10,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:10,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:08:10,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 05:08:10,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078096728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:10,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:10,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 05:08:10,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537747815] [2021-06-05 05:08:10,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:08:10,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:10,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:08:10,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:08:10,869 INFO L87 Difference]: Start difference. First operand 122126 states and 266907 transitions. Second operand has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:11,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:11,245 INFO L93 Difference]: Finished difference Result 123893 states and 269670 transitions. [2021-06-05 05:08:11,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:08:11,245 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:08:11,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:11,389 INFO L225 Difference]: With dead ends: 123893 [2021-06-05 05:08:11,389 INFO L226 Difference]: Without dead ends: 123827 [2021-06-05 05:08:11,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:08:11,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123827 states. [2021-06-05 05:08:13,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123827 to 122126. [2021-06-05 05:08:13,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.185195496417605) internal successors, (266867), 122125 states have internal predecessors, (266867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266867 transitions. [2021-06-05 05:08:13,563 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266867 transitions. Word has length 76 [2021-06-05 05:08:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:13,563 INFO L482 AbstractCegarLoop]: Abstraction has 122126 states and 266867 transitions. [2021-06-05 05:08:13,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266867 transitions. [2021-06-05 05:08:13,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:08:13,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:13,627 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:13,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:13,828 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:13,828 INFO L82 PathProgramCache]: Analyzing trace with hash 189567813, now seen corresponding path program 120 times [2021-06-05 05:08:13,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:13,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344643181] [2021-06-05 05:08:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:08:13,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:13,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344643181] [2021-06-05 05:08:13,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344643181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:13,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093779831] [2021-06-05 05:08:13,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:13,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 05:08:13,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:13,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:08:13,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-06-05 05:08:14,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093779831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:14,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:14,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 05:08:14,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229225485] [2021-06-05 05:08:14,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:08:14,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:14,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:08:14,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:08:14,053 INFO L87 Difference]: Start difference. First operand 122126 states and 266867 transitions. Second operand has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:15,865 INFO L93 Difference]: Finished difference Result 203383 states and 440408 transitions. [2021-06-05 05:08:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 05:08:15,865 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:08:15,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:16,095 INFO L225 Difference]: With dead ends: 203383 [2021-06-05 05:08:16,095 INFO L226 Difference]: Without dead ends: 203092 [2021-06-05 05:08:16,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 680.0ms TimeCoverageRelationStatistics Valid=782, Invalid=6190, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:08:16,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203092 states. [2021-06-05 05:08:18,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203092 to 153026. [2021-06-05 05:08:18,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153026 states, 153025 states have (on average 2.1853487992158143) internal successors, (334413), 153025 states have internal predecessors, (334413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:18,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153026 states to 153026 states and 334413 transitions. [2021-06-05 05:08:18,719 INFO L78 Accepts]: Start accepts. Automaton has 153026 states and 334413 transitions. Word has length 76 [2021-06-05 05:08:18,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:18,720 INFO L482 AbstractCegarLoop]: Abstraction has 153026 states and 334413 transitions. [2021-06-05 05:08:18,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:18,720 INFO L276 IsEmpty]: Start isEmpty. Operand 153026 states and 334413 transitions. [2021-06-05 05:08:18,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:08:18,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:18,797 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:18,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:18,998 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:18,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:18,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1785917094, now seen corresponding path program 121 times [2021-06-05 05:08:18,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:18,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536398677] [2021-06-05 05:08:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 144 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:19,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:19,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536398677] [2021-06-05 05:08:19,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536398677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:19,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435831461] [2021-06-05 05:08:19,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:19,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:08:19,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 114 proven. 41 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-06-05 05:08:19,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435831461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:19,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:19,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 15 [2021-06-05 05:08:19,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088489348] [2021-06-05 05:08:19,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:08:19,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:19,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:08:19,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:08:19,205 INFO L87 Difference]: Start difference. First operand 153026 states and 334413 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:19,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:19,731 INFO L93 Difference]: Finished difference Result 163078 states and 354025 transitions. [2021-06-05 05:08:19,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:08:19,732 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 05:08:19,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:20,412 INFO L225 Difference]: With dead ends: 163078 [2021-06-05 05:08:20,413 INFO L226 Difference]: Without dead ends: 162830 [2021-06-05 05:08:20,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:08:20,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162830 states. [2021-06-05 05:08:22,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162830 to 153130. [2021-06-05 05:08:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153130 states, 153129 states have (on average 2.1844392636273993) internal successors, (334501), 153129 states have internal predecessors, (334501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153130 states to 153130 states and 334501 transitions. [2021-06-05 05:08:22,883 INFO L78 Accepts]: Start accepts. Automaton has 153130 states and 334501 transitions. Word has length 76 [2021-06-05 05:08:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:22,883 INFO L482 AbstractCegarLoop]: Abstraction has 153130 states and 334501 transitions. [2021-06-05 05:08:22,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 153130 states and 334501 transitions. [2021-06-05 05:08:23,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 05:08:23,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:23,057 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:23,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 05:08:23,257 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:23,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:23,257 INFO L82 PathProgramCache]: Analyzing trace with hash -316262490, now seen corresponding path program 122 times [2021-06-05 05:08:23,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:23,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421736361] [2021-06-05 05:08:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:23,374 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 132 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:23,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:23,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421736361] [2021-06-05 05:08:23,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421736361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:23,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158843274] [2021-06-05 05:08:23,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:23,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:23,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:23,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 05:08:23,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 132 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:23,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158843274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:23,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:23,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 05:08:23,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346727478] [2021-06-05 05:08:23,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:08:23,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:23,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:08:23,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:08:23,512 INFO L87 Difference]: Start difference. First operand 153130 states and 334501 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:24,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:24,150 INFO L93 Difference]: Finished difference Result 169486 states and 368744 transitions. [2021-06-05 05:08:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:08:24,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-05 05:08:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:24,351 INFO L225 Difference]: With dead ends: 169486 [2021-06-05 05:08:24,351 INFO L226 Difference]: Without dead ends: 169486 [2021-06-05 05:08:24,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 205.7ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:08:24,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169486 states. [2021-06-05 05:08:26,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169486 to 157008. [2021-06-05 05:08:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157008 states, 157007 states have (on average 2.18660951422548) internal successors, (343313), 157007 states have internal predecessors, (343313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:26,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157008 states to 157008 states and 343313 transitions. [2021-06-05 05:08:26,987 INFO L78 Accepts]: Start accepts. Automaton has 157008 states and 343313 transitions. Word has length 86 [2021-06-05 05:08:26,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:26,987 INFO L482 AbstractCegarLoop]: Abstraction has 157008 states and 343313 transitions. [2021-06-05 05:08:26,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:26,987 INFO L276 IsEmpty]: Start isEmpty. Operand 157008 states and 343313 transitions. [2021-06-05 05:08:27,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 05:08:27,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:27,115 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:27,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 05:08:27,317 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:27,317 INFO L82 PathProgramCache]: Analyzing trace with hash -342094170, now seen corresponding path program 123 times [2021-06-05 05:08:27,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:27,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139395476] [2021-06-05 05:08:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 161 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:27,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:27,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139395476] [2021-06-05 05:08:27,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139395476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:27,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55729978] [2021-06-05 05:08:27,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:27,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 05:08:27,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:27,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 05:08:27,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 161 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:28,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55729978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:28,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:28,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:08:28,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415737194] [2021-06-05 05:08:28,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:08:28,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:28,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:08:28,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:08:28,129 INFO L87 Difference]: Start difference. First operand 157008 states and 343313 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:28,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:28,562 INFO L93 Difference]: Finished difference Result 159720 states and 347802 transitions. [2021-06-05 05:08:28,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:08:28,563 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-05 05:08:28,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:28,749 INFO L225 Difference]: With dead ends: 159720 [2021-06-05 05:08:28,749 INFO L226 Difference]: Without dead ends: 159716 [2021-06-05 05:08:28,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:08:28,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159716 states. [2021-06-05 05:08:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159716 to 154858. [2021-06-05 05:08:31,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154858 states, 154857 states have (on average 2.1844734174109015) internal successors, (338281), 154857 states have internal predecessors, (338281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154858 states to 154858 states and 338281 transitions. [2021-06-05 05:08:31,286 INFO L78 Accepts]: Start accepts. Automaton has 154858 states and 338281 transitions. Word has length 86 [2021-06-05 05:08:31,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:31,286 INFO L482 AbstractCegarLoop]: Abstraction has 154858 states and 338281 transitions. [2021-06-05 05:08:31,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 154858 states and 338281 transitions. [2021-06-05 05:08:31,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 05:08:31,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:31,409 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:31,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:31,609 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:31,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:31,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1880023924, now seen corresponding path program 124 times [2021-06-05 05:08:31,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:31,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065800012] [2021-06-05 05:08:31,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 154 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:31,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:31,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065800012] [2021-06-05 05:08:31,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065800012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:31,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753378099] [2021-06-05 05:08:31,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:31,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:31,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:31,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:08:31,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 150 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:08:31,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753378099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:31,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:31,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2021-06-05 05:08:31,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744231528] [2021-06-05 05:08:31,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:08:31,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:31,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:08:31,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:08:31,859 INFO L87 Difference]: Start difference. First operand 154858 states and 338281 transitions. Second operand has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:33,097 INFO L93 Difference]: Finished difference Result 164918 states and 359351 transitions. [2021-06-05 05:08:33,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:08:33,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-05 05:08:33,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:33,284 INFO L225 Difference]: With dead ends: 164918 [2021-06-05 05:08:33,284 INFO L226 Difference]: Without dead ends: 164914 [2021-06-05 05:08:33,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=311, Invalid=745, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:08:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164914 states. [2021-06-05 05:08:35,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164914 to 155138. [2021-06-05 05:08:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155138 states, 155137 states have (on average 2.1851718158788684) internal successors, (339001), 155137 states have internal predecessors, (339001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155138 states to 155138 states and 339001 transitions. [2021-06-05 05:08:35,822 INFO L78 Accepts]: Start accepts. Automaton has 155138 states and 339001 transitions. Word has length 86 [2021-06-05 05:08:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:35,822 INFO L482 AbstractCegarLoop]: Abstraction has 155138 states and 339001 transitions. [2021-06-05 05:08:35,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 155138 states and 339001 transitions. [2021-06-05 05:08:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 05:08:35,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:35,949 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:36,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 05:08:36,150 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:36,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:36,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1015661798, now seen corresponding path program 125 times [2021-06-05 05:08:36,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:36,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436353041] [2021-06-05 05:08:36,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:36,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:36,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436353041] [2021-06-05 05:08:36,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436353041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:36,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955793178] [2021-06-05 05:08:36,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:36,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 05:08:36,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:36,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:08:36,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 146 proven. 87 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 05:08:36,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955793178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:36,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:36,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2021-06-05 05:08:36,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155078682] [2021-06-05 05:08:36,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:08:36,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:36,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:08:36,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:08:36,405 INFO L87 Difference]: Start difference. First operand 155138 states and 339001 transitions. Second operand has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:38,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:38,015 INFO L93 Difference]: Finished difference Result 162401 states and 354857 transitions. [2021-06-05 05:08:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:08:38,015 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-05 05:08:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:38,313 INFO L225 Difference]: With dead ends: 162401 [2021-06-05 05:08:38,313 INFO L226 Difference]: Without dead ends: 162246 [2021-06-05 05:08:38,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=458, Invalid=1102, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:08:38,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162246 states. [2021-06-05 05:08:40,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162246 to 154498. [2021-06-05 05:08:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154498 states, 154497 states have (on average 2.185110390493019) internal successors, (337593), 154497 states have internal predecessors, (337593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154498 states to 154498 states and 337593 transitions. [2021-06-05 05:08:40,929 INFO L78 Accepts]: Start accepts. Automaton has 154498 states and 337593 transitions. Word has length 86 [2021-06-05 05:08:40,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:40,929 INFO L482 AbstractCegarLoop]: Abstraction has 154498 states and 337593 transitions. [2021-06-05 05:08:40,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:40,929 INFO L276 IsEmpty]: Start isEmpty. Operand 154498 states and 337593 transitions. [2021-06-05 05:08:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 05:08:41,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:41,053 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:41,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 05:08:41,254 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:41,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:41,254 INFO L82 PathProgramCache]: Analyzing trace with hash 381795686, now seen corresponding path program 126 times [2021-06-05 05:08:41,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:41,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271750497] [2021-06-05 05:08:41,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 75 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 05:08:41,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:41,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271750497] [2021-06-05 05:08:41,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271750497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:41,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902115624] [2021-06-05 05:08:41,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:41,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 05:08:41,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:41,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 05:08:41,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 75 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 05:08:41,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902115624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:41,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:41,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:08:41,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638024726] [2021-06-05 05:08:41,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:08:41,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:41,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:08:41,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:08:41,452 INFO L87 Difference]: Start difference. First operand 154498 states and 337593 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:42,031 INFO L93 Difference]: Finished difference Result 187447 states and 406719 transitions. [2021-06-05 05:08:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:08:42,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-05 05:08:42,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:42,247 INFO L225 Difference]: With dead ends: 187447 [2021-06-05 05:08:42,247 INFO L226 Difference]: Without dead ends: 187447 [2021-06-05 05:08:42,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:08:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187447 states. [2021-06-05 05:08:44,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187447 to 159330. [2021-06-05 05:08:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159330 states, 159329 states have (on average 2.1893126800519678) internal successors, (348821), 159329 states have internal predecessors, (348821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:45,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159330 states to 159330 states and 348821 transitions. [2021-06-05 05:08:45,445 INFO L78 Accepts]: Start accepts. Automaton has 159330 states and 348821 transitions. Word has length 86 [2021-06-05 05:08:45,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:45,445 INFO L482 AbstractCegarLoop]: Abstraction has 159330 states and 348821 transitions. [2021-06-05 05:08:45,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:45,445 INFO L276 IsEmpty]: Start isEmpty. Operand 159330 states and 348821 transitions. [2021-06-05 05:08:45,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 05:08:45,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:45,598 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:45,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 05:08:45,821 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:45,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1887951014, now seen corresponding path program 127 times [2021-06-05 05:08:45,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:45,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795297558] [2021-06-05 05:08:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 110 proven. 120 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 05:08:45,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:45,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795297558] [2021-06-05 05:08:45,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795297558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:45,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675325100] [2021-06-05 05:08:45,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:45,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:08:45,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 108 proven. 126 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:08:46,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675325100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:46,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:46,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 05:08:46,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357228873] [2021-06-05 05:08:46,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:08:46,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:46,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:08:46,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:08:46,002 INFO L87 Difference]: Start difference. First operand 159330 states and 348821 transitions. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:46,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:46,570 INFO L93 Difference]: Finished difference Result 195387 states and 423182 transitions. [2021-06-05 05:08:46,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:08:46,571 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-05 05:08:46,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:46,803 INFO L225 Difference]: With dead ends: 195387 [2021-06-05 05:08:46,803 INFO L226 Difference]: Without dead ends: 195323 [2021-06-05 05:08:46,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:08:47,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195323 states. [2021-06-05 05:08:49,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195323 to 159302. [2021-06-05 05:08:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159302 states, 159301 states have (on average 2.1885926642017313) internal successors, (348645), 159301 states have internal predecessors, (348645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159302 states to 159302 states and 348645 transitions. [2021-06-05 05:08:50,113 INFO L78 Accepts]: Start accepts. Automaton has 159302 states and 348645 transitions. Word has length 86 [2021-06-05 05:08:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:50,113 INFO L482 AbstractCegarLoop]: Abstraction has 159302 states and 348645 transitions. [2021-06-05 05:08:50,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand 159302 states and 348645 transitions. [2021-06-05 05:08:50,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 05:08:50,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:50,265 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:50,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:50,481 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:50,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:50,481 INFO L82 PathProgramCache]: Analyzing trace with hash -565732340, now seen corresponding path program 128 times [2021-06-05 05:08:50,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:50,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087539887] [2021-06-05 05:08:50,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 101 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:08:50,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:50,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087539887] [2021-06-05 05:08:50,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087539887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:50,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697532208] [2021-06-05 05:08:50,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:50,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:50,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:50,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:08:50,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 131 proven. 103 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:08:50,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697532208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:50,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:50,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 05:08:50,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014871544] [2021-06-05 05:08:50,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:08:50,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:50,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:08:50,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:08:50,669 INFO L87 Difference]: Start difference. First operand 159302 states and 348645 transitions. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:51,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:51,220 INFO L93 Difference]: Finished difference Result 177150 states and 384101 transitions. [2021-06-05 05:08:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:08:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-05 05:08:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:51,421 INFO L225 Difference]: With dead ends: 177150 [2021-06-05 05:08:51,422 INFO L226 Difference]: Without dead ends: 177126 [2021-06-05 05:08:51,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:08:51,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177126 states. [2021-06-05 05:08:53,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177126 to 159386. [2021-06-05 05:08:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159386 states, 159385 states have (on average 2.1882674028296263) internal successors, (348777), 159385 states have internal predecessors, (348777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159386 states to 159386 states and 348777 transitions. [2021-06-05 05:08:54,184 INFO L78 Accepts]: Start accepts. Automaton has 159386 states and 348777 transitions. Word has length 86 [2021-06-05 05:08:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:54,185 INFO L482 AbstractCegarLoop]: Abstraction has 159386 states and 348777 transitions. [2021-06-05 05:08:54,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 159386 states and 348777 transitions. [2021-06-05 05:08:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 05:08:54,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:54,777 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:54,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:54,989 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:54,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:54,989 INFO L82 PathProgramCache]: Analyzing trace with hash 2093645926, now seen corresponding path program 129 times [2021-06-05 05:08:54,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:54,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480051017] [2021-06-05 05:08:54,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 104 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:55,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:55,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480051017] [2021-06-05 05:08:55,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480051017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:55,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127708478] [2021-06-05 05:08:55,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:55,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 05:08:55,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:55,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:08:55,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-06-05 05:08:55,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127708478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:55,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:55,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-06-05 05:08:55,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292219567] [2021-06-05 05:08:55,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:08:55,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:55,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:08:55,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:08:55,285 INFO L87 Difference]: Start difference. First operand 159386 states and 348777 transitions. Second operand has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:57,836 INFO L93 Difference]: Finished difference Result 275251 states and 593414 transitions. [2021-06-05 05:08:57,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 05:08:57,836 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-05 05:08:57,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:58,178 INFO L225 Difference]: With dead ends: 275251 [2021-06-05 05:08:58,178 INFO L226 Difference]: Without dead ends: 275139 [2021-06-05 05:08:58,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4118 ImplicationChecksByTransitivity, 972.9ms TimeCoverageRelationStatistics Valid=1037, Invalid=10519, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 05:08:58,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275139 states. [2021-06-05 05:09:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275139 to 204668. [2021-06-05 05:09:01,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204668 states, 204667 states have (on average 2.1685713866915526) internal successors, (443835), 204667 states have internal predecessors, (443835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204668 states to 204668 states and 443835 transitions. [2021-06-05 05:09:01,981 INFO L78 Accepts]: Start accepts. Automaton has 204668 states and 443835 transitions. Word has length 86 [2021-06-05 05:09:01,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:01,981 INFO L482 AbstractCegarLoop]: Abstraction has 204668 states and 443835 transitions. [2021-06-05 05:09:01,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:01,982 INFO L276 IsEmpty]: Start isEmpty. Operand 204668 states and 443835 transitions. [2021-06-05 05:09:02,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 05:09:02,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:02,111 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:02,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:02,312 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:02,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:02,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1967004549, now seen corresponding path program 130 times [2021-06-05 05:09:02,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:02,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087593152] [2021-06-05 05:09:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 196 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:02,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:02,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087593152] [2021-06-05 05:09:02,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087593152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:02,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080319387] [2021-06-05 05:09:02,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:02,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:09:02,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:02,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:09:02,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 144 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:09:02,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080319387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:02,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:02,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2021-06-05 05:09:02,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455105298] [2021-06-05 05:09:02,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:09:02,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:02,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:09:02,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:09:02,603 INFO L87 Difference]: Start difference. First operand 204668 states and 443835 transitions. Second operand has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:04,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:04,162 INFO L93 Difference]: Finished difference Result 247113 states and 534129 transitions. [2021-06-05 05:09:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:09:04,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-05 05:09:04,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:04,459 INFO L225 Difference]: With dead ends: 247113 [2021-06-05 05:09:04,459 INFO L226 Difference]: Without dead ends: 247095 [2021-06-05 05:09:04,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 270.4ms TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:09:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247095 states. [2021-06-05 05:09:07,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247095 to 223232. [2021-06-05 05:09:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223232 states, 223231 states have (on average 2.1722565414301775) internal successors, (484915), 223231 states have internal predecessors, (484915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223232 states to 223232 states and 484915 transitions. [2021-06-05 05:09:08,225 INFO L78 Accepts]: Start accepts. Automaton has 223232 states and 484915 transitions. Word has length 86 [2021-06-05 05:09:08,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:08,225 INFO L482 AbstractCegarLoop]: Abstraction has 223232 states and 484915 transitions. [2021-06-05 05:09:08,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 223232 states and 484915 transitions. [2021-06-05 05:09:08,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 05:09:08,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:08,365 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:08,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-05 05:09:08,565 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:08,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:08,566 INFO L82 PathProgramCache]: Analyzing trace with hash 454346087, now seen corresponding path program 131 times [2021-06-05 05:09:08,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:08,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661884451] [2021-06-05 05:09:08,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 106 proven. 132 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:09:08,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:08,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661884451] [2021-06-05 05:09:08,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661884451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:08,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327708094] [2021-06-05 05:09:08,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:08,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:09:08,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:08,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:09:08,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 05:09:08,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327708094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:08,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:08,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 05:09:08,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989204088] [2021-06-05 05:09:08,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:09:08,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:08,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:09:08,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:09:08,785 INFO L87 Difference]: Start difference. First operand 223232 states and 484915 transitions. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:10,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:10,119 INFO L93 Difference]: Finished difference Result 226999 states and 490880 transitions. [2021-06-05 05:09:10,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:09:10,120 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-05 05:09:10,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:10,366 INFO L225 Difference]: With dead ends: 226999 [2021-06-05 05:09:10,366 INFO L226 Difference]: Without dead ends: 226645 [2021-06-05 05:09:10,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:09:10,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226645 states. [2021-06-05 05:09:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226645 to 217428. [2021-06-05 05:09:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217428 states, 217427 states have (on average 2.1668835977132557) internal successors, (471139), 217427 states have internal predecessors, (471139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217428 states to 217428 states and 471139 transitions. [2021-06-05 05:09:14,053 INFO L78 Accepts]: Start accepts. Automaton has 217428 states and 471139 transitions. Word has length 86 [2021-06-05 05:09:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:14,053 INFO L482 AbstractCegarLoop]: Abstraction has 217428 states and 471139 transitions. [2021-06-05 05:09:14,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 217428 states and 471139 transitions. [2021-06-05 05:09:14,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 05:09:14,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:14,173 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:14,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:14,373 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:14,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:14,374 INFO L82 PathProgramCache]: Analyzing trace with hash -400900165, now seen corresponding path program 132 times [2021-06-05 05:09:14,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:14,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465731458] [2021-06-05 05:09:14,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:09:14,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:14,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465731458] [2021-06-05 05:09:14,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465731458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:14,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728372977] [2021-06-05 05:09:14,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:14,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 05:09:14,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:14,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 05:09:14,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:09:14,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728372977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:14,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:14,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:09:14,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530342969] [2021-06-05 05:09:14,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:09:14,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:14,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:09:14,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:09:14,585 INFO L87 Difference]: Start difference. First operand 217428 states and 471139 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:15,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:15,285 INFO L93 Difference]: Finished difference Result 237756 states and 514448 transitions. [2021-06-05 05:09:15,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:09:15,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-05 05:09:15,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:15,577 INFO L225 Difference]: With dead ends: 237756 [2021-06-05 05:09:15,577 INFO L226 Difference]: Without dead ends: 237672 [2021-06-05 05:09:15,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:09:16,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237672 states. [2021-06-05 05:09:18,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237672 to 232076. [2021-06-05 05:09:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232076 states, 232075 states have (on average 2.170931810837014) internal successors, (503819), 232075 states have internal predecessors, (503819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232076 states to 232076 states and 503819 transitions. [2021-06-05 05:09:19,315 INFO L78 Accepts]: Start accepts. Automaton has 232076 states and 503819 transitions. Word has length 86 [2021-06-05 05:09:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:19,315 INFO L482 AbstractCegarLoop]: Abstraction has 232076 states and 503819 transitions. [2021-06-05 05:09:19,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 232076 states and 503819 transitions. [2021-06-05 05:09:20,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 05:09:20,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:20,018 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:20,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 05:09:20,241 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:20,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:20,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1535732903, now seen corresponding path program 133 times [2021-06-05 05:09:20,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:20,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774999847] [2021-06-05 05:09:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 141 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:20,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:20,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774999847] [2021-06-05 05:09:20,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774999847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:20,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839633240] [2021-06-05 05:09:20,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:20,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 05:09:20,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 141 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:20,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839633240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:20,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:20,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 05:09:20,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489626274] [2021-06-05 05:09:20,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:09:20,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:20,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:09:20,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:09:20,487 INFO L87 Difference]: Start difference. First operand 232076 states and 503819 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:21,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:21,314 INFO L93 Difference]: Finished difference Result 252517 states and 547531 transitions. [2021-06-05 05:09:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:09:21,314 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-05 05:09:21,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:21,627 INFO L225 Difference]: With dead ends: 252517 [2021-06-05 05:09:21,627 INFO L226 Difference]: Without dead ends: 252517 [2021-06-05 05:09:21,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 200.0ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:09:22,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252517 states. [2021-06-05 05:09:24,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252517 to 241564. [2021-06-05 05:09:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241564 states, 241563 states have (on average 2.17548631205938) internal successors, (525517), 241563 states have internal predecessors, (525517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241564 states to 241564 states and 525517 transitions. [2021-06-05 05:09:26,169 INFO L78 Accepts]: Start accepts. Automaton has 241564 states and 525517 transitions. Word has length 86 [2021-06-05 05:09:26,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:26,169 INFO L482 AbstractCegarLoop]: Abstraction has 241564 states and 525517 transitions. [2021-06-05 05:09:26,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:26,169 INFO L276 IsEmpty]: Start isEmpty. Operand 241564 states and 525517 transitions. [2021-06-05 05:09:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:09:26,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:26,340 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:26,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:26,554 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:26,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:26,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1737688229, now seen corresponding path program 134 times [2021-06-05 05:09:26,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:26,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608608846] [2021-06-05 05:09:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 169 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:26,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:26,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608608846] [2021-06-05 05:09:26,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608608846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:26,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705824857] [2021-06-05 05:09:26,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:26,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:09:26,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:26,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:09:26,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 169 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:26,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705824857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:26,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:26,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 05:09:26,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392488098] [2021-06-05 05:09:26,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:09:26,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:26,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:09:26,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:09:26,845 INFO L87 Difference]: Start difference. First operand 241564 states and 525517 transitions. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:28,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:28,520 INFO L93 Difference]: Finished difference Result 283927 states and 618212 transitions. [2021-06-05 05:09:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:09:28,520 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:09:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:29,090 INFO L225 Difference]: With dead ends: 283927 [2021-06-05 05:09:29,090 INFO L226 Difference]: Without dead ends: 283661 [2021-06-05 05:09:29,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=449, Invalid=883, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:09:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283661 states. [2021-06-05 05:09:32,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283661 to 277706. [2021-06-05 05:09:33,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277706 states, 277705 states have (on average 2.1876415620892673) internal successors, (607519), 277705 states have internal predecessors, (607519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277706 states to 277706 states and 607519 transitions. [2021-06-05 05:09:34,402 INFO L78 Accepts]: Start accepts. Automaton has 277706 states and 607519 transitions. Word has length 96 [2021-06-05 05:09:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:34,402 INFO L482 AbstractCegarLoop]: Abstraction has 277706 states and 607519 transitions. [2021-06-05 05:09:34,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 277706 states and 607519 transitions. [2021-06-05 05:09:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:09:34,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:34,610 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:34,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 05:09:34,810 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:34,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:34,811 INFO L82 PathProgramCache]: Analyzing trace with hash -232879921, now seen corresponding path program 135 times [2021-06-05 05:09:34,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:34,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565984037] [2021-06-05 05:09:34,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:34,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:34,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565984037] [2021-06-05 05:09:34,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565984037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:34,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209601443] [2021-06-05 05:09:34,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:34,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 05:09:34,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:34,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:09:34,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:35,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209601443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:35,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:35,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:09:35,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207410777] [2021-06-05 05:09:35,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:09:35,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:35,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:09:35,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:09:35,026 INFO L87 Difference]: Start difference. First operand 277706 states and 607519 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:36,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:36,579 INFO L93 Difference]: Finished difference Result 283289 states and 617046 transitions. [2021-06-05 05:09:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:09:36,579 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:09:36,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:36,919 INFO L225 Difference]: With dead ends: 283289 [2021-06-05 05:09:36,919 INFO L226 Difference]: Without dead ends: 283289 [2021-06-05 05:09:36,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283289 states. [2021-06-05 05:09:40,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283289 to 273694. [2021-06-05 05:09:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273694 states, 273693 states have (on average 2.184911561494083) internal successors, (597995), 273693 states have internal predecessors, (597995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273694 states to 273694 states and 597995 transitions. [2021-06-05 05:09:41,679 INFO L78 Accepts]: Start accepts. Automaton has 273694 states and 597995 transitions. Word has length 96 [2021-06-05 05:09:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:41,679 INFO L482 AbstractCegarLoop]: Abstraction has 273694 states and 597995 transitions. [2021-06-05 05:09:41,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:41,679 INFO L276 IsEmpty]: Start isEmpty. Operand 273694 states and 597995 transitions. [2021-06-05 05:09:41,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:09:41,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:41,876 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:42,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 05:09:42,081 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:42,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:42,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1493261733, now seen corresponding path program 136 times [2021-06-05 05:09:42,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:42,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878840283] [2021-06-05 05:09:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:09:42,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:42,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878840283] [2021-06-05 05:09:42,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878840283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:42,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501687834] [2021-06-05 05:09:42,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:42,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:09:42,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:42,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:09:42,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:09:42,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501687834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:42,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:42,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:09:42,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139539501] [2021-06-05 05:09:42,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:09:42,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:42,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:09:42,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:09:42,280 INFO L87 Difference]: Start difference. First operand 273694 states and 597995 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:43,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:43,852 INFO L93 Difference]: Finished difference Result 283158 states and 616236 transitions. [2021-06-05 05:09:43,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:09:43,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:09:43,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:44,192 INFO L225 Difference]: With dead ends: 283158 [2021-06-05 05:09:44,192 INFO L226 Difference]: Without dead ends: 283152 [2021-06-05 05:09:44,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:44,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283152 states. [2021-06-05 05:09:47,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283152 to 277546. [2021-06-05 05:09:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277546 states, 277545 states have (on average 2.1873894323443044) internal successors, (607099), 277545 states have internal predecessors, (607099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277546 states to 277546 states and 607099 transitions. [2021-06-05 05:09:49,062 INFO L78 Accepts]: Start accepts. Automaton has 277546 states and 607099 transitions. Word has length 96 [2021-06-05 05:09:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:49,062 INFO L482 AbstractCegarLoop]: Abstraction has 277546 states and 607099 transitions. [2021-06-05 05:09:49,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 277546 states and 607099 transitions. [2021-06-05 05:09:49,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:09:49,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:49,259 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:49,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:49,461 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:49,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:49,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1188536113, now seen corresponding path program 137 times [2021-06-05 05:09:49,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:49,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306068013] [2021-06-05 05:09:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 147 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:09:49,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:49,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306068013] [2021-06-05 05:09:49,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306068013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:49,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794610968] [2021-06-05 05:09:49,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:49,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 05:09:49,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:49,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:09:49,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 147 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:09:49,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794610968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:49,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:49,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:09:49,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325756446] [2021-06-05 05:09:49,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:09:49,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:49,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:09:49,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:09:49,678 INFO L87 Difference]: Start difference. First operand 277546 states and 607099 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:51,269 INFO L93 Difference]: Finished difference Result 287744 states and 625793 transitions. [2021-06-05 05:09:51,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:09:51,269 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:09:51,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:51,590 INFO L225 Difference]: With dead ends: 287744 [2021-06-05 05:09:51,591 INFO L226 Difference]: Without dead ends: 287744 [2021-06-05 05:09:51,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:51,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287744 states. [2021-06-05 05:09:54,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287744 to 277562. [2021-06-05 05:09:55,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277562 states, 277561 states have (on average 2.1872056953246313) internal successors, (607083), 277561 states have internal predecessors, (607083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:56,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277562 states to 277562 states and 607083 transitions. [2021-06-05 05:09:56,436 INFO L78 Accepts]: Start accepts. Automaton has 277562 states and 607083 transitions. Word has length 96 [2021-06-05 05:09:56,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:56,436 INFO L482 AbstractCegarLoop]: Abstraction has 277562 states and 607083 transitions. [2021-06-05 05:09:56,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:56,437 INFO L276 IsEmpty]: Start isEmpty. Operand 277562 states and 607083 transitions. [2021-06-05 05:09:56,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:09:56,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:56,626 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:56,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 05:09:56,827 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:56,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:56,827 INFO L82 PathProgramCache]: Analyzing trace with hash -798332187, now seen corresponding path program 138 times [2021-06-05 05:09:56,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:56,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939323106] [2021-06-05 05:09:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:56,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:56,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939323106] [2021-06-05 05:09:56,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939323106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:56,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997375652] [2021-06-05 05:09:56,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:56,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 05:09:56,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:56,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:09:56,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:57,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997375652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:57,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:57,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 05:09:57,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574853349] [2021-06-05 05:09:57,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:09:57,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:57,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:09:57,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:09:57,047 INFO L87 Difference]: Start difference. First operand 277562 states and 607083 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:58,673 INFO L93 Difference]: Finished difference Result 287474 states and 626678 transitions. [2021-06-05 05:09:58,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:09:58,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:09:58,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:59,025 INFO L225 Difference]: With dead ends: 287474 [2021-06-05 05:09:59,025 INFO L226 Difference]: Without dead ends: 287474 [2021-06-05 05:09:59,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:09:59,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287474 states. [2021-06-05 05:10:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287474 to 273034. [2021-06-05 05:10:02,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273034 states, 273033 states have (on average 2.184860438115539) internal successors, (596539), 273033 states have internal predecessors, (596539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273034 states to 273034 states and 596539 transitions. [2021-06-05 05:10:03,857 INFO L78 Accepts]: Start accepts. Automaton has 273034 states and 596539 transitions. Word has length 96 [2021-06-05 05:10:03,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:03,857 INFO L482 AbstractCegarLoop]: Abstraction has 273034 states and 596539 transitions. [2021-06-05 05:10:03,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:03,858 INFO L276 IsEmpty]: Start isEmpty. Operand 273034 states and 596539 transitions. [2021-06-05 05:10:04,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:10:04,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:04,100 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:04,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:04,301 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:04,301 INFO L82 PathProgramCache]: Analyzing trace with hash 529753287, now seen corresponding path program 139 times [2021-06-05 05:10:04,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:04,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962663790] [2021-06-05 05:10:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 168 proven. 128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:10:04,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:04,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962663790] [2021-06-05 05:10:04,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962663790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:04,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859564538] [2021-06-05 05:10:04,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:04,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:04,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 168 proven. 128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:10:04,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859564538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:04,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:04,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:10:04,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484364741] [2021-06-05 05:10:04,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:04,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:04,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:04,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:04,506 INFO L87 Difference]: Start difference. First operand 273034 states and 596539 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:06,099 INFO L93 Difference]: Finished difference Result 292897 states and 638403 transitions. [2021-06-05 05:10:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:10:06,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:10:06,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:06,483 INFO L225 Difference]: With dead ends: 292897 [2021-06-05 05:10:06,483 INFO L226 Difference]: Without dead ends: 292861 [2021-06-05 05:10:06,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:06,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292861 states. [2021-06-05 05:10:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292861 to 277790. [2021-06-05 05:10:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277790 states, 277789 states have (on average 2.1869656465878777) internal successors, (607515), 277789 states have internal predecessors, (607515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277790 states to 277790 states and 607515 transitions. [2021-06-05 05:10:11,369 INFO L78 Accepts]: Start accepts. Automaton has 277790 states and 607515 transitions. Word has length 96 [2021-06-05 05:10:11,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:11,370 INFO L482 AbstractCegarLoop]: Abstraction has 277790 states and 607515 transitions. [2021-06-05 05:10:11,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 277790 states and 607515 transitions. [2021-06-05 05:10:11,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:10:11,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:11,611 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:11,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:11,811 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:11,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:11,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2053890469, now seen corresponding path program 140 times [2021-06-05 05:10:11,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:11,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164644840] [2021-06-05 05:10:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:10:11,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:11,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164644840] [2021-06-05 05:10:11,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164644840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:11,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624679205] [2021-06-05 05:10:11,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:11,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:11,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:11,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:11,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:10:12,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624679205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:12,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:12,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:10:12,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198254554] [2021-06-05 05:10:12,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:12,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:12,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:12,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:12,010 INFO L87 Difference]: Start difference. First operand 277790 states and 607515 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:13,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:13,624 INFO L93 Difference]: Finished difference Result 289842 states and 631433 transitions. [2021-06-05 05:10:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:10:13,625 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:10:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:14,315 INFO L225 Difference]: With dead ends: 289842 [2021-06-05 05:10:14,315 INFO L226 Difference]: Without dead ends: 289806 [2021-06-05 05:10:14,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289806 states. [2021-06-05 05:10:18,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289806 to 279306. [2021-06-05 05:10:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279306 states, 279305 states have (on average 2.1874259322246288) internal successors, (610959), 279305 states have internal predecessors, (610959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279306 states to 279306 states and 610959 transitions. [2021-06-05 05:10:18,940 INFO L78 Accepts]: Start accepts. Automaton has 279306 states and 610959 transitions. Word has length 96 [2021-06-05 05:10:18,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:18,940 INFO L482 AbstractCegarLoop]: Abstraction has 279306 states and 610959 transitions. [2021-06-05 05:10:18,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:18,940 INFO L276 IsEmpty]: Start isEmpty. Operand 279306 states and 610959 transitions. [2021-06-05 05:10:19,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:10:19,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:19,833 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:20,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:20,064 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:20,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1749164849, now seen corresponding path program 141 times [2021-06-05 05:10:20,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:20,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075008956] [2021-06-05 05:10:20,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:10:20,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:20,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075008956] [2021-06-05 05:10:20,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075008956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:20,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886367811] [2021-06-05 05:10:20,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:20,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 05:10:20,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:20,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:20,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:10:20,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886367811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:20,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:20,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:10:20,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935331096] [2021-06-05 05:10:20,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:20,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:20,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:20,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:20,271 INFO L87 Difference]: Start difference. First operand 279306 states and 610959 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:21,109 INFO L93 Difference]: Finished difference Result 293716 states and 638382 transitions. [2021-06-05 05:10:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:10:21,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:10:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:21,479 INFO L225 Difference]: With dead ends: 293716 [2021-06-05 05:10:21,479 INFO L226 Difference]: Without dead ends: 293716 [2021-06-05 05:10:21,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:22,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293716 states. [2021-06-05 05:10:25,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293716 to 279290. [2021-06-05 05:10:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279290 states, 279289 states have (on average 2.1870356512429776) internal successors, (610815), 279289 states have internal predecessors, (610815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279290 states to 279290 states and 610815 transitions. [2021-06-05 05:10:27,314 INFO L78 Accepts]: Start accepts. Automaton has 279290 states and 610815 transitions. Word has length 96 [2021-06-05 05:10:27,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:27,314 INFO L482 AbstractCegarLoop]: Abstraction has 279290 states and 610815 transitions. [2021-06-05 05:10:27,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:27,314 INFO L276 IsEmpty]: Start isEmpty. Operand 279290 states and 610815 transitions. [2021-06-05 05:10:27,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:10:27,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:27,510 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:27,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:27,711 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1358960923, now seen corresponding path program 142 times [2021-06-05 05:10:27,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:27,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38489965] [2021-06-05 05:10:27,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 170 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:10:27,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:27,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38489965] [2021-06-05 05:10:27,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38489965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:27,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313971107] [2021-06-05 05:10:27,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:27,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:27,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:27,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:27,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 170 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:10:27,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313971107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:27,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:27,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 05:10:27,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869602340] [2021-06-05 05:10:27,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:10:27,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:27,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:10:27,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:27,942 INFO L87 Difference]: Start difference. First operand 279290 states and 610815 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:29,525 INFO L93 Difference]: Finished difference Result 305876 states and 664178 transitions. [2021-06-05 05:10:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:10:29,525 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:10:29,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:29,901 INFO L225 Difference]: With dead ends: 305876 [2021-06-05 05:10:29,901 INFO L226 Difference]: Without dead ends: 305876 [2021-06-05 05:10:29,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:10:30,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305876 states. [2021-06-05 05:10:33,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305876 to 279450. [2021-06-05 05:10:33,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279450 states, 279449 states have (on average 2.186928562993605) internal successors, (611135), 279449 states have internal predecessors, (611135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279450 states to 279450 states and 611135 transitions. [2021-06-05 05:10:34,855 INFO L78 Accepts]: Start accepts. Automaton has 279450 states and 611135 transitions. Word has length 96 [2021-06-05 05:10:34,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:34,855 INFO L482 AbstractCegarLoop]: Abstraction has 279450 states and 611135 transitions. [2021-06-05 05:10:34,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 279450 states and 611135 transitions. [2021-06-05 05:10:35,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:10:35,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:35,059 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:35,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-05 05:10:35,260 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:35,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:35,260 INFO L82 PathProgramCache]: Analyzing trace with hash 93904007, now seen corresponding path program 143 times [2021-06-05 05:10:35,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:35,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265223695] [2021-06-05 05:10:35,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:35,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:35,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265223695] [2021-06-05 05:10:35,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265223695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:35,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960788446] [2021-06-05 05:10:35,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:35,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 05:10:35,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:35,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:35,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:35,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960788446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:35,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:35,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 05:10:35,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927502840] [2021-06-05 05:10:35,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:10:35,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:35,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:10:35,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:10:35,482 INFO L87 Difference]: Start difference. First operand 279450 states and 611135 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:37,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:37,041 INFO L93 Difference]: Finished difference Result 291374 states and 635903 transitions. [2021-06-05 05:10:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:10:37,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:10:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:37,433 INFO L225 Difference]: With dead ends: 291374 [2021-06-05 05:10:37,434 INFO L226 Difference]: Without dead ends: 291374 [2021-06-05 05:10:37,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:10:37,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291374 states. [2021-06-05 05:10:41,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291374 to 275266. [2021-06-05 05:10:41,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275266 states, 275265 states have (on average 2.185221513813961) internal successors, (601515), 275265 states have internal predecessors, (601515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275266 states to 275266 states and 601515 transitions. [2021-06-05 05:10:42,291 INFO L78 Accepts]: Start accepts. Automaton has 275266 states and 601515 transitions. Word has length 96 [2021-06-05 05:10:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:42,291 INFO L482 AbstractCegarLoop]: Abstraction has 275266 states and 601515 transitions. [2021-06-05 05:10:42,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:42,292 INFO L276 IsEmpty]: Start isEmpty. Operand 275266 states and 601515 transitions. [2021-06-05 05:10:42,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:10:42,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:42,501 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:42,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 05:10:42,702 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:42,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:42,702 INFO L82 PathProgramCache]: Analyzing trace with hash 211982491, now seen corresponding path program 144 times [2021-06-05 05:10:42,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:42,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877548358] [2021-06-05 05:10:42,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 05:10:42,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:42,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877548358] [2021-06-05 05:10:42,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877548358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:42,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578081559] [2021-06-05 05:10:42,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:42,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 05:10:42,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:42,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:42,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 05:10:42,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578081559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:42,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:42,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:10:42,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105814485] [2021-06-05 05:10:42,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:42,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:42,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:42,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:42,909 INFO L87 Difference]: Start difference. First operand 275266 states and 601515 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:44,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:44,457 INFO L93 Difference]: Finished difference Result 284381 states and 619091 transitions. [2021-06-05 05:10:44,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:10:44,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:10:44,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:44,813 INFO L225 Difference]: With dead ends: 284381 [2021-06-05 05:10:44,813 INFO L226 Difference]: Without dead ends: 284315 [2021-06-05 05:10:44,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:45,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284315 states. [2021-06-05 05:10:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284315 to 279242. [2021-06-05 05:10:48,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279242 states, 279241 states have (on average 2.1870821261920708) internal successors, (610723), 279241 states have internal predecessors, (610723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279242 states to 279242 states and 610723 transitions. [2021-06-05 05:10:49,725 INFO L78 Accepts]: Start accepts. Automaton has 279242 states and 610723 transitions. Word has length 96 [2021-06-05 05:10:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:49,725 INFO L482 AbstractCegarLoop]: Abstraction has 279242 states and 610723 transitions. [2021-06-05 05:10:49,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 279242 states and 610723 transitions. [2021-06-05 05:10:49,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:10:49,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:49,907 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:50,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 05:10:50,107 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:50,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:50,107 INFO L82 PathProgramCache]: Analyzing trace with hash 194774565, now seen corresponding path program 145 times [2021-06-05 05:10:50,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:50,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209386924] [2021-06-05 05:10:50,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 188 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:10:50,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:50,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209386924] [2021-06-05 05:10:50,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209386924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:50,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449938423] [2021-06-05 05:10:50,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:50,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:50,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 188 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:10:50,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449938423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:50,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:50,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:10:50,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039704444] [2021-06-05 05:10:50,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:50,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:50,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:50,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:50,304 INFO L87 Difference]: Start difference. First operand 279242 states and 610723 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:51,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:51,841 INFO L93 Difference]: Finished difference Result 298839 states and 651898 transitions. [2021-06-05 05:10:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:10:51,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:10:51,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:52,206 INFO L225 Difference]: With dead ends: 298839 [2021-06-05 05:10:52,206 INFO L226 Difference]: Without dead ends: 298803 [2021-06-05 05:10:52,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:52,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298803 states. [2021-06-05 05:10:55,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298803 to 280042. [2021-06-05 05:10:56,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280042 states, 280041 states have (on average 2.1865476840891156) internal successors, (612323), 280041 states have internal predecessors, (612323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280042 states to 280042 states and 612323 transitions. [2021-06-05 05:10:56,939 INFO L78 Accepts]: Start accepts. Automaton has 280042 states and 612323 transitions. Word has length 96 [2021-06-05 05:10:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:56,939 INFO L482 AbstractCegarLoop]: Abstraction has 280042 states and 612323 transitions. [2021-06-05 05:10:56,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 280042 states and 612323 transitions. [2021-06-05 05:10:57,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:10:57,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:57,140 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:57,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 05:10:57,340 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:57,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:57,340 INFO L82 PathProgramCache]: Analyzing trace with hash -794721701, now seen corresponding path program 146 times [2021-06-05 05:10:57,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:57,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249409301] [2021-06-05 05:10:57,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 223 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:10:57,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:57,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249409301] [2021-06-05 05:10:57,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249409301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:57,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914369951] [2021-06-05 05:10:57,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:57,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:57,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:57,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:57,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 223 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:10:57,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914369951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:57,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:57,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:10:57,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165072975] [2021-06-05 05:10:57,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:57,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:57,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:57,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:57,547 INFO L87 Difference]: Start difference. First operand 280042 states and 612323 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:59,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:59,308 INFO L93 Difference]: Finished difference Result 294586 states and 641708 transitions. [2021-06-05 05:10:59,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:10:59,308 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:10:59,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:59,864 INFO L225 Difference]: With dead ends: 294586 [2021-06-05 05:10:59,864 INFO L226 Difference]: Without dead ends: 294544 [2021-06-05 05:10:59,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:00,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294544 states. [2021-06-05 05:11:03,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294544 to 284094. [2021-06-05 05:11:03,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284094 states, 284093 states have (on average 2.187280221617569) internal successors, (621391), 284093 states have internal predecessors, (621391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:04,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284094 states to 284094 states and 621391 transitions. [2021-06-05 05:11:04,992 INFO L78 Accepts]: Start accepts. Automaton has 284094 states and 621391 transitions. Word has length 96 [2021-06-05 05:11:04,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:04,992 INFO L482 AbstractCegarLoop]: Abstraction has 284094 states and 621391 transitions. [2021-06-05 05:11:04,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:04,992 INFO L276 IsEmpty]: Start isEmpty. Operand 284094 states and 621391 transitions. [2021-06-05 05:11:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:11:05,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:05,179 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:05,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 05:11:05,380 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:05,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:05,380 INFO L82 PathProgramCache]: Analyzing trace with hash -489996081, now seen corresponding path program 147 times [2021-06-05 05:11:05,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:05,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537023724] [2021-06-05 05:11:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 195 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:11:05,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:05,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537023724] [2021-06-05 05:11:05,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537023724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:05,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592985776] [2021-06-05 05:11:05,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:05,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 05:11:05,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:05,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:11:05,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 195 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:11:05,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592985776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:05,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:05,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:11:05,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138156152] [2021-06-05 05:11:05,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:11:05,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:05,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:11:05,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:11:05,616 INFO L87 Difference]: Start difference. First operand 284094 states and 621391 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:07,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:07,135 INFO L93 Difference]: Finished difference Result 301944 states and 656167 transitions. [2021-06-05 05:11:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:11:07,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:11:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:07,515 INFO L225 Difference]: With dead ends: 301944 [2021-06-05 05:11:07,515 INFO L226 Difference]: Without dead ends: 301944 [2021-06-05 05:11:07,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:07,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301944 states. [2021-06-05 05:11:10,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301944 to 284134. [2021-06-05 05:11:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284134 states, 284133 states have (on average 2.186831519042139) internal successors, (621351), 284133 states have internal predecessors, (621351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:12,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284134 states to 284134 states and 621351 transitions. [2021-06-05 05:11:12,472 INFO L78 Accepts]: Start accepts. Automaton has 284134 states and 621351 transitions. Word has length 96 [2021-06-05 05:11:12,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:12,472 INFO L482 AbstractCegarLoop]: Abstraction has 284134 states and 621351 transitions. [2021-06-05 05:11:12,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 284134 states and 621351 transitions. [2021-06-05 05:11:12,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:11:12,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:12,672 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:12,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 05:11:12,873 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:12,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:12,873 INFO L82 PathProgramCache]: Analyzing trace with hash -99792155, now seen corresponding path program 148 times [2021-06-05 05:11:12,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:12,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501739275] [2021-06-05 05:11:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 191 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:11:12,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:12,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501739275] [2021-06-05 05:11:12,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501739275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:12,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316535575] [2021-06-05 05:11:12,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:12,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:12,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:12,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:11:12,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 191 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:11:13,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316535575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:13,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:13,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 05:11:13,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941064259] [2021-06-05 05:11:13,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:11:13,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:13,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:11:13,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:11:13,119 INFO L87 Difference]: Start difference. First operand 284134 states and 621351 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:14,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:14,722 INFO L93 Difference]: Finished difference Result 329236 states and 714209 transitions. [2021-06-05 05:11:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:11:14,723 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:11:14,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:15,122 INFO L225 Difference]: With dead ends: 329236 [2021-06-05 05:11:15,122 INFO L226 Difference]: Without dead ends: 329236 [2021-06-05 05:11:15,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=231, Invalid=369, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:11:15,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329236 states. [2021-06-05 05:11:19,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329236 to 284210. [2021-06-05 05:11:19,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284210 states, 284209 states have (on average 2.1864367419750956) internal successors, (621405), 284209 states have internal predecessors, (621405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:20,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284210 states to 284210 states and 621405 transitions. [2021-06-05 05:11:20,110 INFO L78 Accepts]: Start accepts. Automaton has 284210 states and 621405 transitions. Word has length 96 [2021-06-05 05:11:20,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:20,110 INFO L482 AbstractCegarLoop]: Abstraction has 284210 states and 621405 transitions. [2021-06-05 05:11:20,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:20,110 INFO L276 IsEmpty]: Start isEmpty. Operand 284210 states and 621405 transitions. [2021-06-05 05:11:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:11:20,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:20,301 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:20,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:20,501 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:20,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:20,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1353072775, now seen corresponding path program 149 times [2021-06-05 05:11:20,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:20,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891594008] [2021-06-05 05:11:20,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 166 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:11:20,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:20,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891594008] [2021-06-05 05:11:20,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891594008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:20,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265346464] [2021-06-05 05:11:20,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:20,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 05:11:20,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:20,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:11:20,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 166 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:11:20,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265346464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:20,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:20,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 05:11:20,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545225558] [2021-06-05 05:11:20,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:11:20,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:20,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:11:20,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:11:20,721 INFO L87 Difference]: Start difference. First operand 284210 states and 621405 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:22,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:22,313 INFO L93 Difference]: Finished difference Result 319340 states and 693417 transitions. [2021-06-05 05:11:22,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:11:22,313 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:11:22,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:22,704 INFO L225 Difference]: With dead ends: 319340 [2021-06-05 05:11:22,704 INFO L226 Difference]: Without dead ends: 319340 [2021-06-05 05:11:22,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:11:23,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319340 states. [2021-06-05 05:11:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319340 to 284530. [2021-06-05 05:11:27,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284530 states, 284529 states have (on average 2.186227062970734) internal successors, (622045), 284529 states have internal predecessors, (622045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:27,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284530 states to 284530 states and 622045 transitions. [2021-06-05 05:11:27,787 INFO L78 Accepts]: Start accepts. Automaton has 284530 states and 622045 transitions. Word has length 96 [2021-06-05 05:11:27,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:27,787 INFO L482 AbstractCegarLoop]: Abstraction has 284530 states and 622045 transitions. [2021-06-05 05:11:27,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:27,788 INFO L276 IsEmpty]: Start isEmpty. Operand 284530 states and 622045 transitions. [2021-06-05 05:11:27,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:11:27,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:27,975 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:28,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:28,176 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:28,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:28,176 INFO L82 PathProgramCache]: Analyzing trace with hash -508398491, now seen corresponding path program 150 times [2021-06-05 05:11:28,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:28,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362377581] [2021-06-05 05:11:28,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:28,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:28,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362377581] [2021-06-05 05:11:28,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362377581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:28,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854177818] [2021-06-05 05:11:28,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:28,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 05:11:28,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:28,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:11:28,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:28,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854177818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:28,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:28,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 05:11:28,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878210045] [2021-06-05 05:11:28,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:11:28,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:28,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:11:28,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:11:28,399 INFO L87 Difference]: Start difference. First operand 284530 states and 622045 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:30,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:30,004 INFO L93 Difference]: Finished difference Result 297354 states and 649674 transitions. [2021-06-05 05:11:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:11:30,004 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:11:30,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:30,363 INFO L225 Difference]: With dead ends: 297354 [2021-06-05 05:11:30,363 INFO L226 Difference]: Without dead ends: 297354 [2021-06-05 05:11:30,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=249, Invalid=453, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:11:30,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297354 states. [2021-06-05 05:11:34,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297354 to 282646. [2021-06-05 05:11:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282646 states, 282645 states have (on average 2.186350368837234) internal successors, (617961), 282645 states have internal predecessors, (617961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:35,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282646 states to 282646 states and 617961 transitions. [2021-06-05 05:11:35,379 INFO L78 Accepts]: Start accepts. Automaton has 282646 states and 617961 transitions. Word has length 96 [2021-06-05 05:11:35,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:35,379 INFO L482 AbstractCegarLoop]: Abstraction has 282646 states and 617961 transitions. [2021-06-05 05:11:35,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:35,379 INFO L276 IsEmpty]: Start isEmpty. Operand 282646 states and 617961 transitions. [2021-06-05 05:11:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:11:35,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:35,600 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:35,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:35,801 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:35,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:35,801 INFO L82 PathProgramCache]: Analyzing trace with hash 343907052, now seen corresponding path program 151 times [2021-06-05 05:11:35,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:35,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59534947] [2021-06-05 05:11:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 141 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:35,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:35,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59534947] [2021-06-05 05:11:35,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59534947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:35,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232622031] [2021-06-05 05:11:35,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:35,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:11:35,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 201 proven. 83 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-06-05 05:11:36,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232622031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:36,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:36,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 14 [2021-06-05 05:11:36,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767542457] [2021-06-05 05:11:36,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:11:36,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:36,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:11:36,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:11:36,014 INFO L87 Difference]: Start difference. First operand 282646 states and 617961 transitions. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:37,744 INFO L93 Difference]: Finished difference Result 296638 states and 645293 transitions. [2021-06-05 05:11:37,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:11:37,744 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:11:37,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:38,141 INFO L225 Difference]: With dead ends: 296638 [2021-06-05 05:11:38,141 INFO L226 Difference]: Without dead ends: 296566 [2021-06-05 05:11:38,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:11:38,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296566 states. [2021-06-05 05:11:42,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296566 to 282646. [2021-06-05 05:11:42,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282646 states, 282645 states have (on average 2.1860107201613332) internal successors, (617865), 282645 states have internal predecessors, (617865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:43,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282646 states to 282646 states and 617865 transitions. [2021-06-05 05:11:43,087 INFO L78 Accepts]: Start accepts. Automaton has 282646 states and 617865 transitions. Word has length 96 [2021-06-05 05:11:43,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:43,087 INFO L482 AbstractCegarLoop]: Abstraction has 282646 states and 617865 transitions. [2021-06-05 05:11:43,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:43,087 INFO L276 IsEmpty]: Start isEmpty. Operand 282646 states and 617865 transitions. [2021-06-05 05:11:43,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:11:43,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:43,320 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:43,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:43,520 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:43,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1564912452, now seen corresponding path program 152 times [2021-06-05 05:11:43,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:43,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525130847] [2021-06-05 05:11:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:44,285 WARN L205 SmtUtils]: Spent 733.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 05:11:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 145 proven. 164 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-06-05 05:11:44,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:44,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525130847] [2021-06-05 05:11:44,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525130847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:44,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54502312] [2021-06-05 05:11:44,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:44,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:44,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:44,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:11:44,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 145 proven. 164 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-06-05 05:11:44,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54502312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:44,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:44,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 05:11:44,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015657767] [2021-06-05 05:11:44,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:11:44,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:44,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:11:44,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:11:44,597 INFO L87 Difference]: Start difference. First operand 282646 states and 617865 transitions. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:45,874 INFO L93 Difference]: Finished difference Result 298171 states and 649070 transitions. [2021-06-05 05:11:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:11:45,874 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:11:45,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:46,407 INFO L225 Difference]: With dead ends: 298171 [2021-06-05 05:11:46,407 INFO L226 Difference]: Without dead ends: 298171 [2021-06-05 05:11:46,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 791.1ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:11:46,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298171 states. [2021-06-05 05:11:50,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298171 to 282022. [2021-06-05 05:11:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282022 states, 282021 states have (on average 2.1855925622560024) internal successors, (616383), 282021 states have internal predecessors, (616383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282022 states to 282022 states and 616383 transitions. [2021-06-05 05:11:51,502 INFO L78 Accepts]: Start accepts. Automaton has 282022 states and 616383 transitions. Word has length 96 [2021-06-05 05:11:51,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:51,502 INFO L482 AbstractCegarLoop]: Abstraction has 282022 states and 616383 transitions. [2021-06-05 05:11:51,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 282022 states and 616383 transitions. [2021-06-05 05:11:51,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:11:51,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:51,697 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:51,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:51,897 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:51,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:51,898 INFO L82 PathProgramCache]: Analyzing trace with hash -64413626, now seen corresponding path program 153 times [2021-06-05 05:11:51,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:51,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623867178] [2021-06-05 05:11:51,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 124 proven. 183 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-06-05 05:11:51,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:51,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623867178] [2021-06-05 05:11:51,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623867178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:51,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222854093] [2021-06-05 05:11:51,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:51,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 05:11:51,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:51,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:11:51,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 6 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-06-05 05:11:52,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222854093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:52,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:52,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 22 [2021-06-05 05:11:52,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930538382] [2021-06-05 05:11:52,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:52,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:52,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:52,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:52,207 INFO L87 Difference]: Start difference. First operand 282022 states and 616383 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:56,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:56,103 INFO L93 Difference]: Finished difference Result 527818 states and 1143066 transitions. [2021-06-05 05:11:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-06-05 05:11:56,104 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:11:56,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:56,768 INFO L225 Difference]: With dead ends: 527818 [2021-06-05 05:11:56,769 INFO L226 Difference]: Without dead ends: 527644 [2021-06-05 05:11:56,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4599 ImplicationChecksByTransitivity, 1106.8ms TimeCoverageRelationStatistics Valid=1106, Invalid=12004, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 05:11:57,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527644 states. [2021-06-05 05:12:03,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527644 to 396232. [2021-06-05 05:12:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396232 states, 396231 states have (on average 2.1780552253609637) internal successors, (863013), 396231 states have internal predecessors, (863013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396232 states to 396232 states and 863013 transitions. [2021-06-05 05:12:04,598 INFO L78 Accepts]: Start accepts. Automaton has 396232 states and 863013 transitions. Word has length 96 [2021-06-05 05:12:04,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:04,598 INFO L482 AbstractCegarLoop]: Abstraction has 396232 states and 863013 transitions. [2021-06-05 05:12:04,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,598 INFO L276 IsEmpty]: Start isEmpty. Operand 396232 states and 863013 transitions. [2021-06-05 05:12:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:12:05,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:05,697 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:05,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:05,909 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:05,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:05,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1559341669, now seen corresponding path program 154 times [2021-06-05 05:12:05,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:05,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375643385] [2021-06-05 05:12:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 165 proven. 125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 05:12:05,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:05,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375643385] [2021-06-05 05:12:05,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375643385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:05,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349779742] [2021-06-05 05:12:05,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:05,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:05,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:05,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:12:05,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 165 proven. 125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 05:12:06,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349779742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:06,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:06,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:12:06,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075793575] [2021-06-05 05:12:06,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:06,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:06,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:06,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:06,108 INFO L87 Difference]: Start difference. First operand 396232 states and 863013 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:07,930 INFO L93 Difference]: Finished difference Result 407321 states and 884626 transitions. [2021-06-05 05:12:07,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:12:07,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:12:07,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:08,460 INFO L225 Difference]: With dead ends: 407321 [2021-06-05 05:12:08,460 INFO L226 Difference]: Without dead ends: 407255 [2021-06-05 05:12:08,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:12:08,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407255 states. [2021-06-05 05:12:13,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407255 to 401628. [2021-06-05 05:12:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401628 states, 401627 states have (on average 2.1796965841439944) internal successors, (875425), 401627 states have internal predecessors, (875425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:15,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401628 states to 401628 states and 875425 transitions. [2021-06-05 05:12:15,029 INFO L78 Accepts]: Start accepts. Automaton has 401628 states and 875425 transitions. Word has length 96 [2021-06-05 05:12:15,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:15,029 INFO L482 AbstractCegarLoop]: Abstraction has 401628 states and 875425 transitions. [2021-06-05 05:12:15,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:15,029 INFO L276 IsEmpty]: Start isEmpty. Operand 401628 states and 875425 transitions. [2021-06-05 05:12:16,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:12:16,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:16,121 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:16,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:16,325 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:16,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:16,325 INFO L82 PathProgramCache]: Analyzing trace with hash 408916935, now seen corresponding path program 155 times [2021-06-05 05:12:16,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:16,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966328058] [2021-06-05 05:12:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 198 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:12:16,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:16,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966328058] [2021-06-05 05:12:16,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966328058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:16,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962763612] [2021-06-05 05:12:16,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:16,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 05:12:16,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:16,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:12:16,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 198 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:12:16,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962763612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:16,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:16,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:12:16,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295577436] [2021-06-05 05:12:16,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:16,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:16,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:16,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:16,523 INFO L87 Difference]: Start difference. First operand 401628 states and 875425 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:18,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:18,343 INFO L93 Difference]: Finished difference Result 427365 states and 929947 transitions. [2021-06-05 05:12:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:12:18,343 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:12:18,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:18,897 INFO L225 Difference]: With dead ends: 427365 [2021-06-05 05:12:18,897 INFO L226 Difference]: Without dead ends: 427293 [2021-06-05 05:12:18,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:12:19,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427293 states. [2021-06-05 05:12:24,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427293 to 403688. [2021-06-05 05:12:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403688 states, 403687 states have (on average 2.1797308310646617) internal successors, (879929), 403687 states have internal predecessors, (879929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403688 states to 403688 states and 879929 transitions. [2021-06-05 05:12:26,377 INFO L78 Accepts]: Start accepts. Automaton has 403688 states and 879929 transitions. Word has length 96 [2021-06-05 05:12:26,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:26,378 INFO L482 AbstractCegarLoop]: Abstraction has 403688 states and 879929 transitions. [2021-06-05 05:12:26,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 403688 states and 879929 transitions. [2021-06-05 05:12:26,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:12:26,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:26,614 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:26,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 05:12:26,817 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:26,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:26,817 INFO L82 PathProgramCache]: Analyzing trace with hash -7602597, now seen corresponding path program 156 times [2021-06-05 05:12:26,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:26,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535556051] [2021-06-05 05:12:26,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 233 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:12:26,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:26,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535556051] [2021-06-05 05:12:26,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535556051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:26,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36660384] [2021-06-05 05:12:26,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:26,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 05:12:26,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:26,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:12:26,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 233 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:12:27,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36660384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:27,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:27,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:12:27,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546107007] [2021-06-05 05:12:27,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:27,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:27,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:27,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:27,015 INFO L87 Difference]: Start difference. First operand 403688 states and 879929 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:28,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:28,896 INFO L93 Difference]: Finished difference Result 425634 states and 925391 transitions. [2021-06-05 05:12:28,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:12:28,896 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:12:28,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:29,459 INFO L225 Difference]: With dead ends: 425634 [2021-06-05 05:12:29,460 INFO L226 Difference]: Without dead ends: 425592 [2021-06-05 05:12:29,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:12:29,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425592 states. [2021-06-05 05:12:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425592 to 412428. [2021-06-05 05:12:37,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412428 states, 412427 states have (on average 2.1807131928801944) internal successors, (899385), 412427 states have internal predecessors, (899385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412428 states to 412428 states and 899385 transitions. [2021-06-05 05:12:38,193 INFO L78 Accepts]: Start accepts. Automaton has 412428 states and 899385 transitions. Word has length 96 [2021-06-05 05:12:38,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:38,193 INFO L482 AbstractCegarLoop]: Abstraction has 412428 states and 899385 transitions. [2021-06-05 05:12:38,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,193 INFO L276 IsEmpty]: Start isEmpty. Operand 412428 states and 899385 transitions. [2021-06-05 05:12:38,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:12:38,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:38,463 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:38,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 05:12:38,676 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:38,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:38,677 INFO L82 PathProgramCache]: Analyzing trace with hash 297123023, now seen corresponding path program 157 times [2021-06-05 05:12:38,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:38,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107746732] [2021-06-05 05:12:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:12:38,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:38,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107746732] [2021-06-05 05:12:38,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107746732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:38,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399151494] [2021-06-05 05:12:38,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:38,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:12:38,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:12:38,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399151494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:38,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:38,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:12:38,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131605481] [2021-06-05 05:12:38,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:38,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:38,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:38,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:38,938 INFO L87 Difference]: Start difference. First operand 412428 states and 899385 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:40,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:40,895 INFO L93 Difference]: Finished difference Result 439240 states and 953108 transitions. [2021-06-05 05:12:40,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:12:40,895 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:12:40,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:41,510 INFO L225 Difference]: With dead ends: 439240 [2021-06-05 05:12:41,510 INFO L226 Difference]: Without dead ends: 439240 [2021-06-05 05:12:41,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:12:42,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439240 states. [2021-06-05 05:12:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439240 to 412684. [2021-06-05 05:12:48,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412684 states, 412683 states have (on average 2.1804266228557996) internal successors, (899825), 412683 states have internal predecessors, (899825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412684 states to 412684 states and 899825 transitions. [2021-06-05 05:12:49,909 INFO L78 Accepts]: Start accepts. Automaton has 412684 states and 899825 transitions. Word has length 96 [2021-06-05 05:12:49,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:49,909 INFO L482 AbstractCegarLoop]: Abstraction has 412684 states and 899825 transitions. [2021-06-05 05:12:49,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,909 INFO L276 IsEmpty]: Start isEmpty. Operand 412684 states and 899825 transitions. [2021-06-05 05:12:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:12:50,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:50,251 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:50,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 05:12:50,451 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:50,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:50,452 INFO L82 PathProgramCache]: Analyzing trace with hash 687326949, now seen corresponding path program 158 times [2021-06-05 05:12:50,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:50,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86432364] [2021-06-05 05:12:50,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 202 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:12:50,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:50,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86432364] [2021-06-05 05:12:50,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86432364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:50,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766886692] [2021-06-05 05:12:50,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:50,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:50,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:50,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:12:50,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 202 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:12:50,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766886692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:50,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:50,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 05:12:50,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205340430] [2021-06-05 05:12:50,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:50,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:50,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:50,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:50,698 INFO L87 Difference]: Start difference. First operand 412684 states and 899825 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:52,594 INFO L93 Difference]: Finished difference Result 495432 states and 1073586 transitions. [2021-06-05 05:12:52,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:12:52,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:12:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:53,228 INFO L225 Difference]: With dead ends: 495432 [2021-06-05 05:12:53,228 INFO L226 Difference]: Without dead ends: 495432 [2021-06-05 05:12:53,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=250, Invalid=400, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:12:53,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495432 states. [2021-06-05 05:12:59,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495432 to 413220. [2021-06-05 05:12:59,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413220 states, 413219 states have (on average 2.1798634622318915) internal successors, (900761), 413219 states have internal predecessors, (900761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413220 states to 413220 states and 900761 transitions. [2021-06-05 05:13:00,718 INFO L78 Accepts]: Start accepts. Automaton has 413220 states and 900761 transitions. Word has length 96 [2021-06-05 05:13:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:00,718 INFO L482 AbstractCegarLoop]: Abstraction has 413220 states and 900761 transitions. [2021-06-05 05:13:00,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:00,718 INFO L276 IsEmpty]: Start isEmpty. Operand 413220 states and 900761 transitions. [2021-06-05 05:13:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:13:01,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:01,796 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:01,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:01,997 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:01,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:01,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2140191879, now seen corresponding path program 159 times [2021-06-05 05:13:01,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:01,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323552546] [2021-06-05 05:13:01,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 182 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:13:02,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:02,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323552546] [2021-06-05 05:13:02,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323552546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:02,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524923526] [2021-06-05 05:13:02,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:02,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 05:13:02,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:02,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:13:02,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 182 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:13:02,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524923526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:02,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:02,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 05:13:02,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472862121] [2021-06-05 05:13:02,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:13:02,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:02,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:13:02,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:13:02,228 INFO L87 Difference]: Start difference. First operand 413220 states and 900761 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:04,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:04,331 INFO L93 Difference]: Finished difference Result 497004 states and 1077768 transitions. [2021-06-05 05:13:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:13:04,331 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:13:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:04,958 INFO L225 Difference]: With dead ends: 497004 [2021-06-05 05:13:04,958 INFO L226 Difference]: Without dead ends: 497004 [2021-06-05 05:13:04,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=307, Invalid=505, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:13:05,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497004 states. [2021-06-05 05:13:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497004 to 413420. [2021-06-05 05:13:11,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413420 states, 413419 states have (on average 2.179457160894879) internal successors, (901029), 413419 states have internal predecessors, (901029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:12,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413420 states to 413420 states and 901029 transitions. [2021-06-05 05:13:12,582 INFO L78 Accepts]: Start accepts. Automaton has 413420 states and 901029 transitions. Word has length 96 [2021-06-05 05:13:12,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:12,582 INFO L482 AbstractCegarLoop]: Abstraction has 413420 states and 901029 transitions. [2021-06-05 05:13:12,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:12,582 INFO L276 IsEmpty]: Start isEmpty. Operand 413420 states and 901029 transitions. [2021-06-05 05:13:13,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:13:13,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:13,874 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:14,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 05:13:14,095 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:14,096 INFO L82 PathProgramCache]: Analyzing trace with hash 278720613, now seen corresponding path program 160 times [2021-06-05 05:13:14,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:14,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006408938] [2021-06-05 05:13:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 161 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:13:14,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:14,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006408938] [2021-06-05 05:13:14,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006408938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:14,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354346575] [2021-06-05 05:13:14,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:14,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:14,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:14,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:13:14,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 161 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:13:14,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354346575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:14,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:14,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 05:13:14,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223695194] [2021-06-05 05:13:14,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:13:14,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:14,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:13:14,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:13:14,362 INFO L87 Difference]: Start difference. First operand 413420 states and 901029 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:16,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:16,293 INFO L93 Difference]: Finished difference Result 465380 states and 1009820 transitions. [2021-06-05 05:13:16,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:13:16,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:13:16,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:17,633 INFO L225 Difference]: With dead ends: 465380 [2021-06-05 05:13:17,633 INFO L226 Difference]: Without dead ends: 465380 [2021-06-05 05:13:17,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 226.5ms TimeCoverageRelationStatistics Valid=321, Invalid=549, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:13:18,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465380 states. [2021-06-05 05:13:23,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465380 to 414060. [2021-06-05 05:13:24,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414060 states, 414059 states have (on average 2.1791797787271863) internal successors, (902309), 414059 states have internal predecessors, (902309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414060 states to 414060 states and 902309 transitions. [2021-06-05 05:13:25,827 INFO L78 Accepts]: Start accepts. Automaton has 414060 states and 902309 transitions. Word has length 96 [2021-06-05 05:13:25,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:25,828 INFO L482 AbstractCegarLoop]: Abstraction has 414060 states and 902309 transitions. [2021-06-05 05:13:25,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:25,828 INFO L276 IsEmpty]: Start isEmpty. Operand 414060 states and 902309 transitions. [2021-06-05 05:13:26,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:13:26,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:26,083 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:26,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:26,284 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:26,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:26,284 INFO L82 PathProgramCache]: Analyzing trace with hash 553698183, now seen corresponding path program 161 times [2021-06-05 05:13:26,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:26,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366719747] [2021-06-05 05:13:26,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:26,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:26,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366719747] [2021-06-05 05:13:26,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366719747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:26,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614713215] [2021-06-05 05:13:26,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:26,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 05:13:26,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:26,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:13:26,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:26,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614713215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:26,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:26,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 05:13:26,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96119272] [2021-06-05 05:13:26,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:13:26,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:26,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:13:26,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:13:26,520 INFO L87 Difference]: Start difference. First operand 414060 states and 902309 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:28,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:28,501 INFO L93 Difference]: Finished difference Result 430906 states and 940689 transitions. [2021-06-05 05:13:28,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:13:28,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:13:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:29,128 INFO L225 Difference]: With dead ends: 430906 [2021-06-05 05:13:29,129 INFO L226 Difference]: Without dead ends: 430906 [2021-06-05 05:13:29,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=283, Invalid=529, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:13:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430906 states. [2021-06-05 05:13:35,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430906 to 401228. [2021-06-05 05:13:35,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401228 states, 401227 states have (on average 2.1776525508004196) internal successors, (873733), 401227 states have internal predecessors, (873733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401228 states to 401228 states and 873733 transitions. [2021-06-05 05:13:36,536 INFO L78 Accepts]: Start accepts. Automaton has 401228 states and 873733 transitions. Word has length 96 [2021-06-05 05:13:36,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:36,536 INFO L482 AbstractCegarLoop]: Abstraction has 401228 states and 873733 transitions. [2021-06-05 05:13:36,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:36,536 INFO L276 IsEmpty]: Start isEmpty. Operand 401228 states and 873733 transitions. [2021-06-05 05:13:36,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:13:36,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:36,771 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:36,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:36,971 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:36,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:36,972 INFO L82 PathProgramCache]: Analyzing trace with hash 449615781, now seen corresponding path program 162 times [2021-06-05 05:13:36,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:36,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588440162] [2021-06-05 05:13:36,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 200 proven. 96 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:13:37,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:37,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588440162] [2021-06-05 05:13:37,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588440162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:37,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284345656] [2021-06-05 05:13:37,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:37,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 05:13:37,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:37,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:13:37,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 200 proven. 96 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:13:38,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284345656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:38,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:38,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:13:38,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246649279] [2021-06-05 05:13:38,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:13:38,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:38,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:13:38,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:13:38,012 INFO L87 Difference]: Start difference. First operand 401228 states and 873733 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:39,270 INFO L93 Difference]: Finished difference Result 424850 states and 924011 transitions. [2021-06-05 05:13:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:13:39,270 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:13:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:40,358 INFO L225 Difference]: With dead ends: 424850 [2021-06-05 05:13:40,358 INFO L226 Difference]: Without dead ends: 424778 [2021-06-05 05:13:40,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:13:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424778 states. [2021-06-05 05:13:45,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424778 to 401892. [2021-06-05 05:13:46,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401892 states, 401891 states have (on average 2.1778666354807648) internal successors, (875265), 401891 states have internal predecessors, (875265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:46,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401892 states to 401892 states and 875265 transitions. [2021-06-05 05:13:46,952 INFO L78 Accepts]: Start accepts. Automaton has 401892 states and 875265 transitions. Word has length 96 [2021-06-05 05:13:46,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:46,952 INFO L482 AbstractCegarLoop]: Abstraction has 401892 states and 875265 transitions. [2021-06-05 05:13:46,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:46,953 INFO L276 IsEmpty]: Start isEmpty. Operand 401892 states and 875265 transitions. [2021-06-05 05:13:48,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:13:48,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:48,005 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:48,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:48,205 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:48,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:48,205 INFO L82 PathProgramCache]: Analyzing trace with hash -198417829, now seen corresponding path program 163 times [2021-06-05 05:13:48,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:48,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817263285] [2021-06-05 05:13:48,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 235 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:13:48,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:48,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817263285] [2021-06-05 05:13:48,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817263285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:48,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355164057] [2021-06-05 05:13:48,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:48,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:13:48,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 235 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:13:48,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355164057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:48,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:48,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:13:48,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538206504] [2021-06-05 05:13:48,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:13:48,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:48,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:13:48,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:13:48,406 INFO L87 Difference]: Start difference. First operand 401892 states and 875265 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:50,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:50,421 INFO L93 Difference]: Finished difference Result 419176 states and 910606 transitions. [2021-06-05 05:13:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:13:50,422 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:13:50,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:51,336 INFO L225 Difference]: With dead ends: 419176 [2021-06-05 05:13:51,336 INFO L226 Difference]: Without dead ends: 419134 [2021-06-05 05:13:51,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:13:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419134 states. [2021-06-05 05:13:57,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419134 to 407336. [2021-06-05 05:13:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407336 states, 407335 states have (on average 2.1785532792419016) internal successors, (887401), 407335 states have internal predecessors, (887401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407336 states to 407336 states and 887401 transitions. [2021-06-05 05:13:58,526 INFO L78 Accepts]: Start accepts. Automaton has 407336 states and 887401 transitions. Word has length 96 [2021-06-05 05:13:58,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:58,527 INFO L482 AbstractCegarLoop]: Abstraction has 407336 states and 887401 transitions. [2021-06-05 05:13:58,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:58,527 INFO L276 IsEmpty]: Start isEmpty. Operand 407336 states and 887401 transitions. [2021-06-05 05:13:59,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:13:59,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:59,558 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:59,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-05 05:13:59,758 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:59,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:59,759 INFO L82 PathProgramCache]: Analyzing trace with hash 106307791, now seen corresponding path program 164 times [2021-06-05 05:13:59,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:59,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567466359] [2021-06-05 05:13:59,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 207 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:13:59,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:59,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567466359] [2021-06-05 05:13:59,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567466359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:59,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057698442] [2021-06-05 05:13:59,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:59,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:59,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:59,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:13:59,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 207 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:13:59,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057698442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:59,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:59,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 05:13:59,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079306524] [2021-06-05 05:13:59,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:13:59,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:59,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:13:59,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:13:59,988 INFO L87 Difference]: Start difference. First operand 407336 states and 887401 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:01,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:01,758 INFO L93 Difference]: Finished difference Result 432146 states and 937019 transitions. [2021-06-05 05:14:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:14:01,758 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:14:01,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:02,307 INFO L225 Difference]: With dead ends: 432146 [2021-06-05 05:14:02,307 INFO L226 Difference]: Without dead ends: 432146 [2021-06-05 05:14:02,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:14:02,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432146 states. [2021-06-05 05:14:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432146 to 407536. [2021-06-05 05:14:08,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407536 states, 407535 states have (on average 2.178485283472585) internal successors, (887809), 407535 states have internal predecessors, (887809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:09,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407536 states to 407536 states and 887809 transitions. [2021-06-05 05:14:09,673 INFO L78 Accepts]: Start accepts. Automaton has 407536 states and 887809 transitions. Word has length 96 [2021-06-05 05:14:09,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:09,673 INFO L482 AbstractCegarLoop]: Abstraction has 407536 states and 887809 transitions. [2021-06-05 05:14:09,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:09,673 INFO L276 IsEmpty]: Start isEmpty. Operand 407536 states and 887809 transitions. [2021-06-05 05:14:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:14:09,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:09,898 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:10,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:10,098 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:10,098 INFO L82 PathProgramCache]: Analyzing trace with hash 496511717, now seen corresponding path program 165 times [2021-06-05 05:14:10,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:10,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308074096] [2021-06-05 05:14:10,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:14:10,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:10,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308074096] [2021-06-05 05:14:10,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308074096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:10,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559432681] [2021-06-05 05:14:10,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:10,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 05:14:10,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:10,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:14:10,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:14:10,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559432681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:10,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:10,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 05:14:10,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352081574] [2021-06-05 05:14:10,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:14:10,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:10,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:14:10,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:14:10,311 INFO L87 Difference]: Start difference. First operand 407536 states and 887809 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:12,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:12,303 INFO L93 Difference]: Finished difference Result 488982 states and 1058761 transitions. [2021-06-05 05:14:12,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:14:12,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:14:12,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:12,937 INFO L225 Difference]: With dead ends: 488982 [2021-06-05 05:14:12,937 INFO L226 Difference]: Without dead ends: 488982 [2021-06-05 05:14:12,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=268, Invalid=434, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:14:13,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488982 states. [2021-06-05 05:14:19,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488982 to 408416. [2021-06-05 05:14:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408416 states, 408415 states have (on average 2.178090912429759) internal successors, (889565), 408415 states have internal predecessors, (889565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:20,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408416 states to 408416 states and 889565 transitions. [2021-06-05 05:14:20,701 INFO L78 Accepts]: Start accepts. Automaton has 408416 states and 889565 transitions. Word has length 96 [2021-06-05 05:14:20,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:20,702 INFO L482 AbstractCegarLoop]: Abstraction has 408416 states and 889565 transitions. [2021-06-05 05:14:20,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 408416 states and 889565 transitions. [2021-06-05 05:14:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:14:20,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:20,921 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:21,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 05:14:21,122 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:21,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:21,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1949376647, now seen corresponding path program 166 times [2021-06-05 05:14:21,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:21,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799707688] [2021-06-05 05:14:21,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 189 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:14:21,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:21,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799707688] [2021-06-05 05:14:21,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799707688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:21,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715793228] [2021-06-05 05:14:21,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:21,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:21,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:21,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:14:21,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 189 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:14:22,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715793228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:22,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:22,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 05:14:22,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420484628] [2021-06-05 05:14:22,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:14:22,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:22,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:14:22,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:14:22,142 INFO L87 Difference]: Start difference. First operand 408416 states and 889565 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:24,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:24,223 INFO L93 Difference]: Finished difference Result 500230 states and 1083955 transitions. [2021-06-05 05:14:24,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:14:24,223 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:14:24,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:24,981 INFO L225 Difference]: With dead ends: 500230 [2021-06-05 05:14:24,981 INFO L226 Difference]: Without dead ends: 500230 [2021-06-05 05:14:24,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=350, Invalid=580, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:14:25,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500230 states. [2021-06-05 05:14:30,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500230 to 409316. [2021-06-05 05:14:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409316 states, 409315 states have (on average 2.177748189047555) internal successors, (891385), 409315 states have internal predecessors, (891385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409316 states to 409316 states and 891385 transitions. [2021-06-05 05:14:33,397 INFO L78 Accepts]: Start accepts. Automaton has 409316 states and 891385 transitions. Word has length 96 [2021-06-05 05:14:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:33,397 INFO L482 AbstractCegarLoop]: Abstraction has 409316 states and 891385 transitions. [2021-06-05 05:14:33,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:33,398 INFO L276 IsEmpty]: Start isEmpty. Operand 409316 states and 891385 transitions. [2021-06-05 05:14:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:14:33,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:33,710 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:33,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 05:14:33,929 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:33,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:33,929 INFO L82 PathProgramCache]: Analyzing trace with hash 87905381, now seen corresponding path program 167 times [2021-06-05 05:14:33,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:33,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94360084] [2021-06-05 05:14:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 173 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:14:34,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:34,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94360084] [2021-06-05 05:14:34,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94360084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:34,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154794438] [2021-06-05 05:14:34,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:34,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 05:14:34,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:34,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:14:34,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 173 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:14:34,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154794438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:34,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:34,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 05:14:34,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366208802] [2021-06-05 05:14:34,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:14:34,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:34,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:14:34,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:14:34,206 INFO L87 Difference]: Start difference. First operand 409316 states and 891385 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:37,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:37,170 INFO L93 Difference]: Finished difference Result 484574 states and 1051121 transitions. [2021-06-05 05:14:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:14:37,170 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:14:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:38,261 INFO L225 Difference]: With dead ends: 484574 [2021-06-05 05:14:38,261 INFO L226 Difference]: Without dead ends: 484574 [2021-06-05 05:14:38,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:14:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484574 states. [2021-06-05 05:14:45,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484574 to 409896. [2021-06-05 05:14:45,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409896 states, 409895 states have (on average 2.1773405384305735) internal successors, (892481), 409895 states have internal predecessors, (892481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:46,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409896 states to 409896 states and 892481 transitions. [2021-06-05 05:14:46,802 INFO L78 Accepts]: Start accepts. Automaton has 409896 states and 892481 transitions. Word has length 96 [2021-06-05 05:14:46,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:46,802 INFO L482 AbstractCegarLoop]: Abstraction has 409896 states and 892481 transitions. [2021-06-05 05:14:46,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:46,802 INFO L276 IsEmpty]: Start isEmpty. Operand 409896 states and 892481 transitions. [2021-06-05 05:14:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:14:47,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:47,043 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:47,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 05:14:47,243 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:47,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:47,244 INFO L82 PathProgramCache]: Analyzing trace with hash 362882951, now seen corresponding path program 168 times [2021-06-05 05:14:47,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:47,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546209716] [2021-06-05 05:14:47,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 157 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:14:47,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:47,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546209716] [2021-06-05 05:14:47,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546209716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:47,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946508931] [2021-06-05 05:14:47,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:47,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 05:14:47,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:47,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:14:47,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 157 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:14:47,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946508931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:47,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:47,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 05:14:47,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239854372] [2021-06-05 05:14:47,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:14:47,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:47,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:14:47,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:14:47,474 INFO L87 Difference]: Start difference. First operand 409896 states and 892481 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:49,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:49,536 INFO L93 Difference]: Finished difference Result 452934 states and 982423 transitions. [2021-06-05 05:14:49,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:14:49,536 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:14:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:50,727 INFO L225 Difference]: With dead ends: 452934 [2021-06-05 05:14:50,728 INFO L226 Difference]: Without dead ends: 452934 [2021-06-05 05:14:50,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=385, Invalid=671, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:14:51,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452934 states. [2021-06-05 05:14:56,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452934 to 410776. [2021-06-05 05:14:56,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410776 states, 410775 states have (on average 2.1769606232122207) internal successors, (894241), 410775 states have internal predecessors, (894241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410776 states to 410776 states and 894241 transitions. [2021-06-05 05:14:57,648 INFO L78 Accepts]: Start accepts. Automaton has 410776 states and 894241 transitions. Word has length 96 [2021-06-05 05:14:57,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:57,648 INFO L482 AbstractCegarLoop]: Abstraction has 410776 states and 894241 transitions. [2021-06-05 05:14:57,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:57,648 INFO L276 IsEmpty]: Start isEmpty. Operand 410776 states and 894241 transitions. [2021-06-05 05:14:58,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:14:58,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:58,694 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:58,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 05:14:58,894 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:58,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:58,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1973198309, now seen corresponding path program 169 times [2021-06-05 05:14:58,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:58,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393357139] [2021-06-05 05:14:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:58,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:58,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393357139] [2021-06-05 05:14:58,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393357139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:58,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043854537] [2021-06-05 05:14:58,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:59,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:14:59,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:59,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043854537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:59,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:59,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 05:14:59,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84591643] [2021-06-05 05:14:59,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:14:59,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:59,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:14:59,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:14:59,138 INFO L87 Difference]: Start difference. First operand 410776 states and 894241 transitions. Second operand has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:01,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:01,092 INFO L93 Difference]: Finished difference Result 425560 states and 927070 transitions. [2021-06-05 05:15:01,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:15:01,092 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:15:01,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:01,919 INFO L225 Difference]: With dead ends: 425560 [2021-06-05 05:15:01,920 INFO L226 Difference]: Without dead ends: 425560 [2021-06-05 05:15:01,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:15:02,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425560 states. [2021-06-05 05:15:07,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425560 to 404836. [2021-06-05 05:15:08,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404836 states, 404835 states have (on average 2.178163943334939) internal successors, (881797), 404835 states have internal predecessors, (881797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:10,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404836 states to 404836 states and 881797 transitions. [2021-06-05 05:15:10,184 INFO L78 Accepts]: Start accepts. Automaton has 404836 states and 881797 transitions. Word has length 96 [2021-06-05 05:15:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:10,184 INFO L482 AbstractCegarLoop]: Abstraction has 404836 states and 881797 transitions. [2021-06-05 05:15:10,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 404836 states and 881797 transitions. [2021-06-05 05:15:10,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:15:10,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:10,469 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:10,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:10,685 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:10,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2072034489, now seen corresponding path program 170 times [2021-06-05 05:15:10,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:10,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664244618] [2021-06-05 05:15:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 113 proven. 177 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 05:15:10,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:10,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664244618] [2021-06-05 05:15:10,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664244618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:10,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055924541] [2021-06-05 05:15:10,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:10,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:10,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:10,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:15:10,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 113 proven. 177 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 05:15:10,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055924541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:10,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:10,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 05:15:10,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717773562] [2021-06-05 05:15:10,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:15:10,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:10,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:15:10,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:15:10,961 INFO L87 Difference]: Start difference. First operand 404836 states and 881797 transitions. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:13,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:13,207 INFO L93 Difference]: Finished difference Result 422860 states and 919321 transitions. [2021-06-05 05:15:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:15:13,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 05:15:13,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:14,247 INFO L225 Difference]: With dead ends: 422860 [2021-06-05 05:15:14,248 INFO L226 Difference]: Without dead ends: 422704 [2021-06-05 05:15:14,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:15:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422704 states. [2021-06-05 05:15:20,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422704 to 408288. [2021-06-05 05:15:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408288 states, 408287 states have (on average 2.179890616159711) internal successors, (890021), 408287 states have internal predecessors, (890021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:21,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408288 states to 408288 states and 890021 transitions. [2021-06-05 05:15:21,822 INFO L78 Accepts]: Start accepts. Automaton has 408288 states and 890021 transitions. Word has length 96 [2021-06-05 05:15:21,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:21,822 INFO L482 AbstractCegarLoop]: Abstraction has 408288 states and 890021 transitions. [2021-06-05 05:15:21,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:21,822 INFO L276 IsEmpty]: Start isEmpty. Operand 408288 states and 890021 transitions. [2021-06-05 05:15:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 05:15:22,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:22,875 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:23,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 05:15:23,075 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:23,076 INFO L82 PathProgramCache]: Analyzing trace with hash 304123099, now seen corresponding path program 171 times [2021-06-05 05:15:23,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:23,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41256013] [2021-06-05 05:15:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 118 proven. 169 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 05:15:23,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:23,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41256013] [2021-06-05 05:15:23,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41256013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:23,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426114292] [2021-06-05 05:15:23,145 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 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 [2021-06-05 05:15:23,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 05:15:23,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:23,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:15:23,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 118 proven. 169 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 05:15:23,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426114292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:23,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:23,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 05:15:23,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028745535] [2021-06-05 05:15:23,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:15:23,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:23,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:15:23,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:15:23,293 INFO L87 Difference]: Start difference. First operand 408288 states and 890021 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 05:15:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:15:23,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:23,667 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 05:15:23,669 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:15:23,671 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 05:15:23,671 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:15:23 BasicIcfg [2021-06-05 05:15:23,671 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:15:23,672 INFO L168 Benchmark]: Toolchain (without parser) took 646518.65 ms. Allocated memory was 325.1 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 305.1 MB in the beginning and 11.4 GB in the end (delta: -11.1 GB). Peak memory consumption was 4.6 GB. Max. memory is 16.0 GB. [2021-06-05 05:15:23,672 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 325.1 MB. Free memory was 306.3 MB in the beginning and 306.2 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:15:23,672 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.13 ms. Allocated memory is still 325.1 MB. Free memory was 305.1 MB in the beginning and 303.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:15:23,672 INFO L168 Benchmark]: Boogie Preprocessor took 12.12 ms. Allocated memory is still 325.1 MB. Free memory was 303.6 MB in the beginning and 302.7 MB in the end (delta: 986.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:15:23,672 INFO L168 Benchmark]: RCFGBuilder took 268.72 ms. Allocated memory is still 325.1 MB. Free memory was 302.7 MB in the beginning and 291.6 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 05:15:23,672 INFO L168 Benchmark]: TraceAbstraction took 646211.29 ms. Allocated memory was 325.1 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 291.2 MB in the beginning and 11.4 GB in the end (delta: -11.1 GB). Peak memory consumption was 4.6 GB. Max. memory is 16.0 GB. [2021-06-05 05:15:23,673 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 325.1 MB. Free memory was 306.3 MB in the beginning and 306.2 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.13 ms. Allocated memory is still 325.1 MB. Free memory was 305.1 MB in the beginning and 303.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.12 ms. Allocated memory is still 325.1 MB. Free memory was 303.6 MB in the beginning and 302.7 MB in the end (delta: 986.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 268.72 ms. Allocated memory is still 325.1 MB. Free memory was 302.7 MB in the beginning and 291.6 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 646211.29 ms. Allocated memory was 325.1 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 291.2 MB in the beginning and 11.4 GB in the end (delta: -11.1 GB). Peak memory consumption was 4.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (408288states) and FLOYD_HOARE automaton (currently 15 states, 14 states before enhancement),while ReachableStatesComputation was computing reachable states (38389 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (408288states) and FLOYD_HOARE automaton (currently 15 states, 14 states before enhancement),while ReachableStatesComputation was computing reachable states (38389 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (408288states) and FLOYD_HOARE automaton (currently 15 states, 14 states before enhancement),while ReachableStatesComputation was computing reachable states (38389 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 44 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 646126.6ms, OverallIterations: 184, TraceHistogramMax: 11, EmptinessCheckTime: 23074.4ms, AutomataDifference: 160256.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 36.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14121 SDtfs, 47098 SDslu, 60979 SDs, 0 SdLazy, 28332 SolverSat, 4912 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17423.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15724 GetRequests, 12338 SyntacticMatches, 100 SemanticMatches, 3286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27753 ImplicationChecksByTransitivity, 21705.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=414060occurred in iteration=173, InterpolantAutomatonStates: 3222, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 388718.3ms AutomataMinimizationTime, 183 MinimizatonAttempts, 2031560 StatesRemovedByMinimization, 183 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 870.6ms SsaConstructionTime, 3523.4ms SatisfiabilityAnalysisTime, 28881.2ms InterpolantComputationTime, 23752 NumberOfCodeBlocks, 23686 NumberOfCodeBlocksAsserted, 991 NumberOfCheckSat, 23390 ConstructedInterpolants, 0 QuantifiedInterpolants, 104165 SizeOfPredicates, 358 NumberOfNonLiveVariables, 18337 ConjunctsInSsa, 2543 ConjunctsInUnsatCore, 362 InterpolantComputations, 6 PerfectInterpolantSequences, 27882/51848 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