/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 22:57:07,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 22:57:07,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 22:57:07,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 22:57:07,128 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 [2021-03-10 22:57:07,150 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 22:57:07,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 22:57:07,153 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 22:57:07,153 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 22:57:07,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 22:57:07,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 22:57:07,155 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 22:57:07,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 22:57:07,156 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 22:57:07,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 22:57:07,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 22:57:07,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 22:57:07,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 22:57:07,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 22:57:07,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 22:57:07,157 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 22:57:07,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 22:57:07,157 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 22:57:07,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 22:57:07,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 22:57:07,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 22:57:07,157 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 22:57:07,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 22:57:07,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:57:07,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 22:57:07,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 22:57:07,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 22:57:07,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 22:57:07,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 22:57:07,158 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 22:57:07,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 22:57:07,158 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 22:57:07,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 22:57:07,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 22:57:07,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 22:57:07,438 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 22:57:07,439 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 22:57:07,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl [2021-03-10 22:57:07,440 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl' [2021-03-10 22:57:07,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 22:57:07,470 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 22:57:07,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 22:57:07,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 22:57:07,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 22:57:07,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:57:07" (1/1) ... [2021-03-10 22:57:07,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:57:07" (1/1) ... [2021-03-10 22:57:07,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 22:57:07,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 22:57:07,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 22:57:07,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 22:57:07,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:57:07" (1/1) ... [2021-03-10 22:57:07,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:57:07" (1/1) ... [2021-03-10 22:57:07,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:57:07" (1/1) ... [2021-03-10 22:57:07,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:57:07" (1/1) ... [2021-03-10 22:57:07,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:57:07" (1/1) ... [2021-03-10 22:57:07,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:57:07" (1/1) ... [2021-03-10 22:57:07,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:57:07" (1/1) ... [2021-03-10 22:57:07,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 22:57:07,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 22:57:07,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 22:57:07,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 22:57:07,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:57:07" (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 [2021-03-10 22:57:07,568 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 22:57:07,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 22:57:07,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 22:57:07,569 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 22:57:07,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 22:57:07,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 22:57:07,569 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 22:57:07,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 22:57:07,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 22:57:07,570 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 22:57:07,758 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 22:57:07,759 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 22:57:07,760 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:57:07 BoogieIcfgContainer [2021-03-10 22:57:07,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 22:57:07,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 22:57:07,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 22:57:07,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 22:57:07,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:57:07" (1/2) ... [2021-03-10 22:57:07,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8cc77c and model type nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 10:57:07, skipping insertion in model container [2021-03-10 22:57:07,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:57:07" (2/2) ... [2021-03-10 22:57:07,766 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr-alt.wvr.bpl [2021-03-10 22:57:07,770 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 22:57:07,770 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 22:57:07,773 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 22:57:07,773 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 22:57:07,795 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 22:57:07,808 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 22:57:07,821 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 22:57:07,821 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 22:57:07,822 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 22:57:07,822 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 22:57:07,822 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 22:57:07,822 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 22:57:07,822 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 22:57:07,822 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 22:57:07,828 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-03-10 22:57:07,836 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:07,838 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:07,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:57:07,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:07,843 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:07,843 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:07,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:07,847 INFO L82 PathProgramCache]: Analyzing trace with hash 754791855, now seen corresponding path program 1 times [2021-03-10 22:57:07,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:07,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896168224] [2021-03-10 22:57:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:08,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896168224] [2021-03-10 22:57:08,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:57:08,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:57:08,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838272680] [2021-03-10 22:57:08,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:57:08,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:08,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:57:08,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:57:08,033 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:08,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:08,086 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-03-10 22:57:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:57:08,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:57:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:08,098 INFO L225 Difference]: With dead ends: 43 [2021-03-10 22:57:08,098 INFO L226 Difference]: Without dead ends: 43 [2021-03-10 22:57:08,099 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:57:08,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-03-10 22:57:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-03-10 22:57:08,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 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) [2021-03-10 22:57:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-03-10 22:57:08,135 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-03-10 22:57:08,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:08,135 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-03-10 22:57:08,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-03-10 22:57:08,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:57:08,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:08,137 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:08,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 22:57:08,137 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:08,138 INFO L82 PathProgramCache]: Analyzing trace with hash 759896365, now seen corresponding path program 1 times [2021-03-10 22:57:08,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:08,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529739905] [2021-03-10 22:57:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:57:08,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529739905] [2021-03-10 22:57:08,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:57:08,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:57:08,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204632869] [2021-03-10 22:57:08,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:57:08,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:08,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:57:08,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:57:08,169 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:08,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:08,192 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-03-10 22:57:08,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:57:08,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:57:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:08,193 INFO L225 Difference]: With dead ends: 50 [2021-03-10 22:57:08,193 INFO L226 Difference]: Without dead ends: 50 [2021-03-10 22:57:08,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:57:08,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-03-10 22:57:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-03-10 22:57:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:08,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-03-10 22:57:08,198 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-03-10 22:57:08,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:08,199 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-03-10 22:57:08,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:08,199 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-03-10 22:57:08,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:57:08,199 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:08,200 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:08,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 22:57:08,200 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:08,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:08,200 INFO L82 PathProgramCache]: Analyzing trace with hash -806719381, now seen corresponding path program 1 times [2021-03-10 22:57:08,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:08,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390173290] [2021-03-10 22:57:08,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:08,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390173290] [2021-03-10 22:57:08,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656007514] [2021-03-10 22:57:08,477 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 [2021-03-10 22:57:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:08,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:57:08,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:08,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:08,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:57:08,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107700070] [2021-03-10 22:57:08,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:57:08,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:08,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:57:08,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:57:08,791 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:09,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:09,003 INFO L93 Difference]: Finished difference Result 108 states and 201 transitions. [2021-03-10 22:57:09,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:57:09,003 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:57:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:09,008 INFO L225 Difference]: With dead ends: 108 [2021-03-10 22:57:09,011 INFO L226 Difference]: Without dead ends: 77 [2021-03-10 22:57:09,012 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 330.4ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:57:09,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-03-10 22:57:09,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2021-03-10 22:57:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.8867924528301887) internal successors, (100), 53 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) [2021-03-10 22:57:09,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2021-03-10 22:57:09,026 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 19 [2021-03-10 22:57:09,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:09,026 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2021-03-10 22:57:09,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:09,026 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2021-03-10 22:57:09,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:57:09,027 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:09,027 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:09,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-10 22:57:09,239 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:09,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:09,239 INFO L82 PathProgramCache]: Analyzing trace with hash 242654451, now seen corresponding path program 2 times [2021-03-10 22:57:09,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:09,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445014510] [2021-03-10 22:57:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:09,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445014510] [2021-03-10 22:57:09,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241422423] [2021-03-10 22:57:09,445 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:57:09,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:57:09,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:09,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:57:09,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:09,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:09,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:57:09,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890009669] [2021-03-10 22:57:09,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:57:09,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:09,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:57:09,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:57:09,677 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:09,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:09,957 INFO L93 Difference]: Finished difference Result 130 states and 236 transitions. [2021-03-10 22:57:09,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:57:09,958 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:57:09,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:09,961 INFO L225 Difference]: With dead ends: 130 [2021-03-10 22:57:09,961 INFO L226 Difference]: Without dead ends: 117 [2021-03-10 22:57:09,961 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 338.5ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:57:09,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-03-10 22:57:09,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 57. [2021-03-10 22:57:09,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 56 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:09,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 108 transitions. [2021-03-10 22:57:09,970 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 108 transitions. Word has length 19 [2021-03-10 22:57:09,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:09,970 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 108 transitions. [2021-03-10 22:57:09,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 108 transitions. [2021-03-10 22:57:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:57:09,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:09,971 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:10,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:10,175 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:10,176 INFO L82 PathProgramCache]: Analyzing trace with hash 892723421, now seen corresponding path program 3 times [2021-03-10 22:57:10,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:10,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508931477] [2021-03-10 22:57:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:10,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508931477] [2021-03-10 22:57:10,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582738058] [2021-03-10 22:57:10,360 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 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 [2021-03-10 22:57:10,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:57:10,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:10,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:57:10,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:10,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:10,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:57:10,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371151573] [2021-03-10 22:57:10,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:57:10,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:10,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:57:10,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:57:10,629 INFO L87 Difference]: Start difference. First operand 57 states and 108 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:10,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:10,864 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-03-10 22:57:10,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:57:10,864 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:57:10,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:10,865 INFO L225 Difference]: With dead ends: 90 [2021-03-10 22:57:10,865 INFO L226 Difference]: Without dead ends: 83 [2021-03-10 22:57:10,865 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 306.0ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:57:10,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-03-10 22:57:10,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2021-03-10 22:57:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:10,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-03-10 22:57:10,868 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-03-10 22:57:10,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:10,868 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-03-10 22:57:10,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:10,868 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-03-10 22:57:10,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:57:10,869 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:10,869 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:11,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:11,084 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:11,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:11,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1736336617, now seen corresponding path program 4 times [2021-03-10 22:57:11,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:11,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407725375] [2021-03-10 22:57:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:11,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407725375] [2021-03-10 22:57:11,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816981816] [2021-03-10 22:57:11,342 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 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 [2021-03-10 22:57:11,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:57:11,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:11,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:57:11,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:11,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:11,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:57:11,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907384436] [2021-03-10 22:57:11,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:57:11,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:11,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:57:11,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:57:11,624 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:11,917 INFO L93 Difference]: Finished difference Result 117 states and 220 transitions. [2021-03-10 22:57:11,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:57:11,918 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:57:11,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:11,919 INFO L225 Difference]: With dead ends: 117 [2021-03-10 22:57:11,923 INFO L226 Difference]: Without dead ends: 103 [2021-03-10 22:57:11,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 468.3ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:57:11,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-03-10 22:57:11,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2021-03-10 22:57:11,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:11,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2021-03-10 22:57:11,935 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2021-03-10 22:57:11,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:11,935 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2021-03-10 22:57:11,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:11,935 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2021-03-10 22:57:11,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:57:11,936 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:11,936 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:12,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:12,137 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:12,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:12,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1509256847, now seen corresponding path program 5 times [2021-03-10 22:57:12,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:12,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126087199] [2021-03-10 22:57:12,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:12,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126087199] [2021-03-10 22:57:12,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806143458] [2021-03-10 22:57:12,304 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:57:12,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:57:12,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:12,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:57:12,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:12,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:12,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:57:12,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147368309] [2021-03-10 22:57:12,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:57:12,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:12,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:57:12,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:57:12,538 INFO L87 Difference]: Start difference. First operand 72 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:12,913 INFO L93 Difference]: Finished difference Result 133 states and 248 transitions. [2021-03-10 22:57:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:57:12,913 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:57:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:12,914 INFO L225 Difference]: With dead ends: 133 [2021-03-10 22:57:12,914 INFO L226 Difference]: Without dead ends: 126 [2021-03-10 22:57:12,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 416.0ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:57:12,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-03-10 22:57:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 73. [2021-03-10 22:57:12,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:12,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2021-03-10 22:57:12,918 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 21 [2021-03-10 22:57:12,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:12,919 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2021-03-10 22:57:12,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:12,919 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2021-03-10 22:57:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:57:12,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:12,919 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:13,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-03-10 22:57:13,138 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:13,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:13,138 INFO L82 PathProgramCache]: Analyzing trace with hash -859187877, now seen corresponding path program 6 times [2021-03-10 22:57:13,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:13,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774811643] [2021-03-10 22:57:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:13,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774811643] [2021-03-10 22:57:13,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646271032] [2021-03-10 22:57:13,325 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 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 [2021-03-10 22:57:13,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:57:13,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:13,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:57:13,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:13,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:13,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:57:13,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258261168] [2021-03-10 22:57:13,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:57:13,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:13,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:57:13,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:57:13,573 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:13,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:13,969 INFO L93 Difference]: Finished difference Result 113 states and 215 transitions. [2021-03-10 22:57:13,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:57:13,970 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:57:13,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:13,971 INFO L225 Difference]: With dead ends: 113 [2021-03-10 22:57:13,971 INFO L226 Difference]: Without dead ends: 106 [2021-03-10 22:57:13,971 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 449.4ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:57:13,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-03-10 22:57:13,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-03-10 22:57:13,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2021-03-10 22:57:13,974 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2021-03-10 22:57:13,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:13,974 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2021-03-10 22:57:13,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:13,974 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2021-03-10 22:57:13,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:57:13,974 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:13,975 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:14,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:14,192 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:14,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:14,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1888068795, now seen corresponding path program 7 times [2021-03-10 22:57:14,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:14,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893562291] [2021-03-10 22:57:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:14,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893562291] [2021-03-10 22:57:14,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32129900] [2021-03-10 22:57:14,299 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 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 [2021-03-10 22:57:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:14,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:57:14,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:14,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:14,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:57:14,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559991588] [2021-03-10 22:57:14,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:57:14,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:14,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:57:14,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:57:14,521 INFO L87 Difference]: Start difference. First operand 72 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:14,845 INFO L93 Difference]: Finished difference Result 176 states and 320 transitions. [2021-03-10 22:57:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:57:14,845 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:57:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:14,846 INFO L225 Difference]: With dead ends: 176 [2021-03-10 22:57:14,846 INFO L226 Difference]: Without dead ends: 162 [2021-03-10 22:57:14,846 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 341.6ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:57:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-03-10 22:57:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 72. [2021-03-10 22:57:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-03-10 22:57:14,849 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 21 [2021-03-10 22:57:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:14,850 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-03-10 22:57:14,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-03-10 22:57:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:57:14,850 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:14,850 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:15,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:15,059 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:15,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:15,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1756829531, now seen corresponding path program 8 times [2021-03-10 22:57:15,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:15,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863439077] [2021-03-10 22:57:15,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:15,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863439077] [2021-03-10 22:57:15,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359204015] [2021-03-10 22:57:15,170 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 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 [2021-03-10 22:57:15,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:57:15,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:15,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:57:15,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:15,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:15,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:57:15,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8613302] [2021-03-10 22:57:15,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:57:15,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:15,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:57:15,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:57:15,422 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:15,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:15,768 INFO L93 Difference]: Finished difference Result 163 states and 289 transitions. [2021-03-10 22:57:15,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:57:15,769 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:57:15,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:15,770 INFO L225 Difference]: With dead ends: 163 [2021-03-10 22:57:15,770 INFO L226 Difference]: Without dead ends: 149 [2021-03-10 22:57:15,770 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 353.7ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:57:15,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-03-10 22:57:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 71. [2021-03-10 22:57:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 70 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 138 transitions. [2021-03-10 22:57:15,773 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 138 transitions. Word has length 21 [2021-03-10 22:57:15,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:15,773 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 138 transitions. [2021-03-10 22:57:15,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:15,773 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 138 transitions. [2021-03-10 22:57:15,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:57:15,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:15,774 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:15,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 22:57:15,987 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:15,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:15,988 INFO L82 PathProgramCache]: Analyzing trace with hash 477277963, now seen corresponding path program 9 times [2021-03-10 22:57:15,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:15,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036373993] [2021-03-10 22:57:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:16,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036373993] [2021-03-10 22:57:16,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979369382] [2021-03-10 22:57:16,098 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 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 [2021-03-10 22:57:16,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:57:16,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:16,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:57:16,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:16,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:16,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:57:16,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227711167] [2021-03-10 22:57:16,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:57:16,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:16,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:57:16,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:57:16,332 INFO L87 Difference]: Start difference. First operand 71 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:16,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:16,563 INFO L93 Difference]: Finished difference Result 104 states and 188 transitions. [2021-03-10 22:57:16,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:57:16,564 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:57:16,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:16,565 INFO L225 Difference]: With dead ends: 104 [2021-03-10 22:57:16,565 INFO L226 Difference]: Without dead ends: 90 [2021-03-10 22:57:16,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:57:16,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-03-10 22:57:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2021-03-10 22:57:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:16,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 141 transitions. [2021-03-10 22:57:16,567 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 141 transitions. Word has length 21 [2021-03-10 22:57:16,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:16,567 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 141 transitions. [2021-03-10 22:57:16,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:16,567 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 141 transitions. [2021-03-10 22:57:16,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:57:16,568 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:16,568 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:16,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:16,775 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:16,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:16,776 INFO L82 PathProgramCache]: Analyzing trace with hash -362797707, now seen corresponding path program 10 times [2021-03-10 22:57:16,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:16,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025045585] [2021-03-10 22:57:16,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:16,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025045585] [2021-03-10 22:57:16,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312386331] [2021-03-10 22:57:16,893 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 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 [2021-03-10 22:57:16,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:57:16,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:16,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:57:16,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:17,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:17,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:57:17,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028114694] [2021-03-10 22:57:17,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:57:17,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:17,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:57:17,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:57:17,128 INFO L87 Difference]: Start difference. First operand 73 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:17,609 INFO L93 Difference]: Finished difference Result 171 states and 307 transitions. [2021-03-10 22:57:17,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:57:17,609 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:57:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:17,610 INFO L225 Difference]: With dead ends: 171 [2021-03-10 22:57:17,610 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 22:57:17,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 522.4ms TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:57:17,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 22:57:17,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 77. [2021-03-10 22:57:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.013157894736842) internal successors, (153), 76 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 153 transitions. [2021-03-10 22:57:17,613 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 153 transitions. Word has length 21 [2021-03-10 22:57:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:17,614 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 153 transitions. [2021-03-10 22:57:17,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:17,614 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 153 transitions. [2021-03-10 22:57:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:57:17,616 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:17,616 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:17,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:17,817 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:17,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:17,817 INFO L82 PathProgramCache]: Analyzing trace with hash 287271263, now seen corresponding path program 11 times [2021-03-10 22:57:17,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:17,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340227907] [2021-03-10 22:57:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:17,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340227907] [2021-03-10 22:57:17,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323616596] [2021-03-10 22:57:17,923 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 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 [2021-03-10 22:57:17,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:57:17,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:17,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:57:17,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:18,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:18,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:57:18,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156975457] [2021-03-10 22:57:18,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:57:18,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:18,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:57:18,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:57:18,153 INFO L87 Difference]: Start difference. First operand 77 states and 153 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:18,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:18,708 INFO L93 Difference]: Finished difference Result 171 states and 303 transitions. [2021-03-10 22:57:18,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:57:18,709 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:57:18,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:18,710 INFO L225 Difference]: With dead ends: 171 [2021-03-10 22:57:18,710 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 22:57:18,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 579.4ms TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:57:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 22:57:18,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 76. [2021-03-10 22:57:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:18,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 149 transitions. [2021-03-10 22:57:18,713 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 149 transitions. Word has length 21 [2021-03-10 22:57:18,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:18,713 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 149 transitions. [2021-03-10 22:57:18,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 149 transitions. [2021-03-10 22:57:18,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:57:18,713 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:18,714 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:18,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 22:57:18,930 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:18,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1773588539, now seen corresponding path program 12 times [2021-03-10 22:57:18,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:18,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996668924] [2021-03-10 22:57:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:19,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996668924] [2021-03-10 22:57:19,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815201328] [2021-03-10 22:57:19,020 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 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 [2021-03-10 22:57:19,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:57:19,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:19,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:57:19,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:19,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:19,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:57:19,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726990601] [2021-03-10 22:57:19,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:57:19,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:19,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:57:19,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:57:19,234 INFO L87 Difference]: Start difference. First operand 76 states and 149 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:19,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:19,666 INFO L93 Difference]: Finished difference Result 139 states and 248 transitions. [2021-03-10 22:57:19,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:57:19,667 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:57:19,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:19,668 INFO L225 Difference]: With dead ends: 139 [2021-03-10 22:57:19,668 INFO L226 Difference]: Without dead ends: 125 [2021-03-10 22:57:19,668 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 433.2ms TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:57:19,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-03-10 22:57:19,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 73. [2021-03-10 22:57:19,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 141 transitions. [2021-03-10 22:57:19,671 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 141 transitions. Word has length 21 [2021-03-10 22:57:19,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:19,671 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 141 transitions. [2021-03-10 22:57:19,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:19,671 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 141 transitions. [2021-03-10 22:57:19,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:57:19,671 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:19,671 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:19,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 22:57:19,879 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:19,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:19,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1986148955, now seen corresponding path program 13 times [2021-03-10 22:57:19,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:19,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478128508] [2021-03-10 22:57:19,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:19,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478128508] [2021-03-10 22:57:19,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084319701] [2021-03-10 22:57:19,979 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 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 [2021-03-10 22:57:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:19,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:57:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:20,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:20,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:57:20,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137956475] [2021-03-10 22:57:20,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:57:20,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:20,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:57:20,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:57:20,230 INFO L87 Difference]: Start difference. First operand 73 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:20,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:20,563 INFO L93 Difference]: Finished difference Result 124 states and 220 transitions. [2021-03-10 22:57:20,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:57:20,564 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:57:20,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:20,564 INFO L225 Difference]: With dead ends: 124 [2021-03-10 22:57:20,564 INFO L226 Difference]: Without dead ends: 92 [2021-03-10 22:57:20,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:57:20,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-03-10 22:57:20,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2021-03-10 22:57:20,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 68 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:20,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 131 transitions. [2021-03-10 22:57:20,567 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 131 transitions. Word has length 21 [2021-03-10 22:57:20,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:20,567 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 131 transitions. [2021-03-10 22:57:20,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:20,567 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 131 transitions. [2021-03-10 22:57:20,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:57:20,567 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:20,567 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:20,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 22:57:20,776 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:20,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1776759271, now seen corresponding path program 14 times [2021-03-10 22:57:20,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:20,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351864024] [2021-03-10 22:57:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:20,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351864024] [2021-03-10 22:57:20,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641288565] [2021-03-10 22:57:20,911 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 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 [2021-03-10 22:57:20,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:57:20,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:20,929 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:57:20,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:21,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:21,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:57:21,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274333998] [2021-03-10 22:57:21,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:57:21,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:21,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:57:21,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:57:21,143 INFO L87 Difference]: Start difference. First operand 69 states and 131 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:21,422 INFO L93 Difference]: Finished difference Result 120 states and 222 transitions. [2021-03-10 22:57:21,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:57:21,422 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-03-10 22:57:21,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:21,423 INFO L225 Difference]: With dead ends: 120 [2021-03-10 22:57:21,423 INFO L226 Difference]: Without dead ends: 106 [2021-03-10 22:57:21,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 420.8ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:57:21,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-03-10 22:57:21,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2021-03-10 22:57:21,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:21,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2021-03-10 22:57:21,425 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 23 [2021-03-10 22:57:21,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:21,425 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2021-03-10 22:57:21,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:21,425 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2021-03-10 22:57:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:57:21,426 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:21,426 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:21,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:21,631 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:21,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1249492263, now seen corresponding path program 15 times [2021-03-10 22:57:21,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:21,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588649785] [2021-03-10 22:57:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:21,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588649785] [2021-03-10 22:57:21,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625403659] [2021-03-10 22:57:21,774 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 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 [2021-03-10 22:57:21,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:57:21,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:21,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:57:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:22,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:22,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:57:22,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496304587] [2021-03-10 22:57:22,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:57:22,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:22,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:57:22,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:57:22,032 INFO L87 Difference]: Start difference. First operand 64 states and 119 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:22,974 INFO L93 Difference]: Finished difference Result 225 states and 407 transitions. [2021-03-10 22:57:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 22:57:22,974 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-03-10 22:57:22,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:22,975 INFO L225 Difference]: With dead ends: 225 [2021-03-10 22:57:22,975 INFO L226 Difference]: Without dead ends: 175 [2021-03-10 22:57:22,976 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1003.6ms TimeCoverageRelationStatistics Valid=425, Invalid=2655, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 22:57:22,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-03-10 22:57:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 92. [2021-03-10 22:57:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.032967032967033) internal successors, (185), 91 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) [2021-03-10 22:57:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 185 transitions. [2021-03-10 22:57:22,979 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 185 transitions. Word has length 23 [2021-03-10 22:57:22,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:22,979 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 185 transitions. [2021-03-10 22:57:22,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:22,979 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 185 transitions. [2021-03-10 22:57:22,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:57:22,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:22,980 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:23,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 22:57:23,191 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:23,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:23,192 INFO L82 PathProgramCache]: Analyzing trace with hash 380430255, now seen corresponding path program 16 times [2021-03-10 22:57:23,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:23,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665240284] [2021-03-10 22:57:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:23,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665240284] [2021-03-10 22:57:23,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812268052] [2021-03-10 22:57:23,398 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 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 [2021-03-10 22:57:23,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:57:23,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:23,421 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:57:23,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:23,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:23,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:57:23,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158449900] [2021-03-10 22:57:23,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:57:23,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:23,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:57:23,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:57:23,668 INFO L87 Difference]: Start difference. First operand 92 states and 185 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:25,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:25,088 INFO L93 Difference]: Finished difference Result 293 states and 527 transitions. [2021-03-10 22:57:25,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 22:57:25,089 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-03-10 22:57:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:25,089 INFO L225 Difference]: With dead ends: 293 [2021-03-10 22:57:25,089 INFO L226 Difference]: Without dead ends: 254 [2021-03-10 22:57:25,090 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1333.1ms TimeCoverageRelationStatistics Valid=557, Invalid=3225, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 22:57:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-03-10 22:57:25,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 107. [2021-03-10 22:57:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:25,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-03-10 22:57:25,094 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 23 [2021-03-10 22:57:25,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:25,094 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-03-10 22:57:25,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:25,094 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-03-10 22:57:25,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:57:25,095 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:25,095 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:25,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 22:57:25,311 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:25,311 INFO L82 PathProgramCache]: Analyzing trace with hash -884497605, now seen corresponding path program 17 times [2021-03-10 22:57:25,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:25,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162230396] [2021-03-10 22:57:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:25,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162230396] [2021-03-10 22:57:25,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45290971] [2021-03-10 22:57:25,521 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 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 [2021-03-10 22:57:25,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:57:25,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:25,540 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:57:25,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:25,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:25,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:57:25,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458257728] [2021-03-10 22:57:25,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:57:25,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:25,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:57:25,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:57:25,775 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:26,993 INFO L93 Difference]: Finished difference Result 263 states and 468 transitions. [2021-03-10 22:57:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 22:57:26,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-03-10 22:57:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:26,994 INFO L225 Difference]: With dead ends: 263 [2021-03-10 22:57:26,994 INFO L226 Difference]: Without dead ends: 236 [2021-03-10 22:57:26,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1190.9ms TimeCoverageRelationStatistics Valid=512, Invalid=2794, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 22:57:26,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-03-10 22:57:26,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 109. [2021-03-10 22:57:26,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:26,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-03-10 22:57:26,998 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 23 [2021-03-10 22:57:26,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:26,999 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-03-10 22:57:26,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:26,999 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-03-10 22:57:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:57:26,999 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:26,999 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:27,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:27,208 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:27,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:27,209 INFO L82 PathProgramCache]: Analyzing trace with hash 251687667, now seen corresponding path program 18 times [2021-03-10 22:57:27,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:27,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283558257] [2021-03-10 22:57:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:27,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283558257] [2021-03-10 22:57:27,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989327240] [2021-03-10 22:57:27,388 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:57:27,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:57:27,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:27,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:57:27,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:27,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:27,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:57:27,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163692042] [2021-03-10 22:57:27,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:57:27,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:27,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:57:27,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:57:27,657 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:28,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:28,949 INFO L93 Difference]: Finished difference Result 280 states and 496 transitions. [2021-03-10 22:57:28,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 22:57:28,949 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-03-10 22:57:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:28,950 INFO L225 Difference]: With dead ends: 280 [2021-03-10 22:57:28,950 INFO L226 Difference]: Without dead ends: 256 [2021-03-10 22:57:28,951 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 1222.5ms TimeCoverageRelationStatistics Valid=551, Invalid=2871, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 22:57:28,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-03-10 22:57:28,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 108. [2021-03-10 22:57:28,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:28,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-03-10 22:57:28,955 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 23 [2021-03-10 22:57:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:28,955 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-03-10 22:57:28,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:28,955 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-03-10 22:57:28,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:57:28,955 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:28,955 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:29,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:29,157 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:29,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:29,157 INFO L82 PathProgramCache]: Analyzing trace with hash 901756637, now seen corresponding path program 19 times [2021-03-10 22:57:29,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:29,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62832778] [2021-03-10 22:57:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:29,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62832778] [2021-03-10 22:57:29,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254483373] [2021-03-10 22:57:29,343 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 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 [2021-03-10 22:57:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:29,360 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:57:29,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:29,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:29,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:57:29,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250015516] [2021-03-10 22:57:29,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:57:29,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:29,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:57:29,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:57:29,587 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:30,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:30,795 INFO L93 Difference]: Finished difference Result 241 states and 458 transitions. [2021-03-10 22:57:30,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 22:57:30,796 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-03-10 22:57:30,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:30,797 INFO L225 Difference]: With dead ends: 241 [2021-03-10 22:57:30,797 INFO L226 Difference]: Without dead ends: 220 [2021-03-10 22:57:30,798 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1180.7ms TimeCoverageRelationStatistics Valid=544, Invalid=2762, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 22:57:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-03-10 22:57:30,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 122. [2021-03-10 22:57:30,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.190082644628099) internal successors, (265), 121 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:30,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 265 transitions. [2021-03-10 22:57:30,801 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 265 transitions. Word has length 23 [2021-03-10 22:57:30,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:30,801 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 265 transitions. [2021-03-10 22:57:30,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:30,802 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 265 transitions. [2021-03-10 22:57:30,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:57:30,802 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:30,802 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:31,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:31,018 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:31,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:31,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1035227257, now seen corresponding path program 20 times [2021-03-10 22:57:31,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:31,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297524191] [2021-03-10 22:57:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:31,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297524191] [2021-03-10 22:57:31,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942529266] [2021-03-10 22:57:31,191 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 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 [2021-03-10 22:57:31,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:57:31,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:31,218 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:57:31,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:31,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:31,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:57:31,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37748531] [2021-03-10 22:57:31,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:57:31,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:31,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:57:31,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:57:31,440 INFO L87 Difference]: Start difference. First operand 122 states and 265 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:32,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:32,993 INFO L93 Difference]: Finished difference Result 342 states and 656 transitions. [2021-03-10 22:57:32,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 22:57:32,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-03-10 22:57:32,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:32,995 INFO L225 Difference]: With dead ends: 342 [2021-03-10 22:57:32,995 INFO L226 Difference]: Without dead ends: 300 [2021-03-10 22:57:32,996 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1447.3ms TimeCoverageRelationStatistics Valid=562, Invalid=3220, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 22:57:32,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-03-10 22:57:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 150. [2021-03-10 22:57:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.248322147651007) internal successors, (335), 149 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:33,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 335 transitions. [2021-03-10 22:57:33,000 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 335 transitions. Word has length 23 [2021-03-10 22:57:33,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:33,000 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 335 transitions. [2021-03-10 22:57:33,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:33,000 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 335 transitions. [2021-03-10 22:57:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:57:33,001 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:33,001 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:33,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 22:57:33,211 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:33,212 INFO L82 PathProgramCache]: Analyzing trace with hash -229700603, now seen corresponding path program 21 times [2021-03-10 22:57:33,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:33,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703433924] [2021-03-10 22:57:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:33,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703433924] [2021-03-10 22:57:33,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035324080] [2021-03-10 22:57:33,400 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:57:33,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:57:33,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:33,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:57:33,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:33,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:33,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:57:33,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971759334] [2021-03-10 22:57:33,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:57:33,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:33,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:57:33,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:57:33,697 INFO L87 Difference]: Start difference. First operand 150 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:35,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:35,333 INFO L93 Difference]: Finished difference Result 342 states and 659 transitions. [2021-03-10 22:57:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 22:57:35,334 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-03-10 22:57:35,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:35,335 INFO L225 Difference]: With dead ends: 342 [2021-03-10 22:57:35,335 INFO L226 Difference]: Without dead ends: 312 [2021-03-10 22:57:35,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1547.1ms TimeCoverageRelationStatistics Valid=593, Invalid=2947, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 22:57:35,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-03-10 22:57:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 150. [2021-03-10 22:57:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.2550335570469797) internal successors, (336), 149 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:35,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 336 transitions. [2021-03-10 22:57:35,340 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 336 transitions. Word has length 23 [2021-03-10 22:57:35,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:35,340 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 336 transitions. [2021-03-10 22:57:35,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 336 transitions. [2021-03-10 22:57:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:57:35,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:35,341 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:35,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 22:57:35,556 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:35,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:35,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1644322069, now seen corresponding path program 22 times [2021-03-10 22:57:35,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:35,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690162148] [2021-03-10 22:57:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:35,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690162148] [2021-03-10 22:57:35,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031802685] [2021-03-10 22:57:35,710 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 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 [2021-03-10 22:57:35,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:57:35,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:35,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:57:35,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:35,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:35,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:57:35,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982323970] [2021-03-10 22:57:35,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:57:35,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:35,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:57:35,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:57:35,958 INFO L87 Difference]: Start difference. First operand 150 states and 336 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:37,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:37,124 INFO L93 Difference]: Finished difference Result 338 states and 691 transitions. [2021-03-10 22:57:37,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 22:57:37,124 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-03-10 22:57:37,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:37,125 INFO L225 Difference]: With dead ends: 338 [2021-03-10 22:57:37,126 INFO L226 Difference]: Without dead ends: 324 [2021-03-10 22:57:37,126 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1129.5ms TimeCoverageRelationStatistics Valid=503, Invalid=2253, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 22:57:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-03-10 22:57:37,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 178. [2021-03-10 22:57:37,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2937853107344632) internal successors, (406), 177 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 406 transitions. [2021-03-10 22:57:37,131 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 406 transitions. Word has length 23 [2021-03-10 22:57:37,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:37,131 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 406 transitions. [2021-03-10 22:57:37,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 406 transitions. [2021-03-10 22:57:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:57:37,132 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:37,132 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:37,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:37,347 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:37,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:37,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1807673865, now seen corresponding path program 23 times [2021-03-10 22:57:37,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:37,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401934041] [2021-03-10 22:57:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:37,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401934041] [2021-03-10 22:57:37,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694470249] [2021-03-10 22:57:37,496 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 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 [2021-03-10 22:57:37,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:57:37,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:37,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:57:37,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:37,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:37,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:57:37,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364133028] [2021-03-10 22:57:37,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:57:37,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:37,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:57:37,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:57:37,756 INFO L87 Difference]: Start difference. First operand 178 states and 406 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:39,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:39,012 INFO L93 Difference]: Finished difference Result 448 states and 939 transitions. [2021-03-10 22:57:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 22:57:39,013 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-03-10 22:57:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:39,014 INFO L225 Difference]: With dead ends: 448 [2021-03-10 22:57:39,014 INFO L226 Difference]: Without dead ends: 410 [2021-03-10 22:57:39,015 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1219.6ms TimeCoverageRelationStatistics Valid=517, Invalid=2453, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 22:57:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-03-10 22:57:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 209. [2021-03-10 22:57:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.3461538461538463) internal successors, (488), 208 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 488 transitions. [2021-03-10 22:57:39,020 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 488 transitions. Word has length 23 [2021-03-10 22:57:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:39,020 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 488 transitions. [2021-03-10 22:57:39,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 488 transitions. [2021-03-10 22:57:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:57:39,021 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:39,021 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:39,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 22:57:39,222 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:39,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:39,222 INFO L82 PathProgramCache]: Analyzing trace with hash -949311587, now seen corresponding path program 24 times [2021-03-10 22:57:39,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:39,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248644401] [2021-03-10 22:57:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:39,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248644401] [2021-03-10 22:57:39,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413648726] [2021-03-10 22:57:39,369 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 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 [2021-03-10 22:57:39,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:57:39,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:39,387 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:57:39,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:39,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:39,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:57:39,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984786981] [2021-03-10 22:57:39,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:57:39,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:39,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:57:39,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:57:39,664 INFO L87 Difference]: Start difference. First operand 209 states and 488 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:40,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:40,804 INFO L93 Difference]: Finished difference Result 425 states and 927 transitions. [2021-03-10 22:57:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 22:57:40,805 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-03-10 22:57:40,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:40,806 INFO L225 Difference]: With dead ends: 425 [2021-03-10 22:57:40,806 INFO L226 Difference]: Without dead ends: 411 [2021-03-10 22:57:40,807 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1147.2ms TimeCoverageRelationStatistics Valid=498, Invalid=2258, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 22:57:40,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-03-10 22:57:40,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 225. [2021-03-10 22:57:40,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.375) internal successors, (532), 224 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 532 transitions. [2021-03-10 22:57:40,812 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 532 transitions. Word has length 23 [2021-03-10 22:57:40,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:40,813 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 532 transitions. [2021-03-10 22:57:40,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-03-10 22:57:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 532 transitions. [2021-03-10 22:57:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:57:40,814 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:40,814 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:41,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:41,027 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:41,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:41,028 INFO L82 PathProgramCache]: Analyzing trace with hash 45870327, now seen corresponding path program 25 times [2021-03-10 22:57:41,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:41,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580478883] [2021-03-10 22:57:41,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:41,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580478883] [2021-03-10 22:57:41,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91764838] [2021-03-10 22:57:41,159 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 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 [2021-03-10 22:57:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:41,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:57:41,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:41,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:41,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 22:57:41,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967263904] [2021-03-10 22:57:41,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:57:41,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:41,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:57:41,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:57:41,434 INFO L87 Difference]: Start difference. First operand 225 states and 532 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:42,276 INFO L93 Difference]: Finished difference Result 478 states and 1023 transitions. [2021-03-10 22:57:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 22:57:42,276 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:57:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:42,278 INFO L225 Difference]: With dead ends: 478 [2021-03-10 22:57:42,278 INFO L226 Difference]: Without dead ends: 457 [2021-03-10 22:57:42,278 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 813.0ms TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 22:57:42,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-03-10 22:57:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 260. [2021-03-10 22:57:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.4208494208494207) internal successors, (627), 259 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 627 transitions. [2021-03-10 22:57:42,284 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 627 transitions. Word has length 25 [2021-03-10 22:57:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:42,284 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 627 transitions. [2021-03-10 22:57:42,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:42,285 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 627 transitions. [2021-03-10 22:57:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:57:42,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:42,285 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:42,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 22:57:42,502 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:42,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:42,503 INFO L82 PathProgramCache]: Analyzing trace with hash 695939297, now seen corresponding path program 26 times [2021-03-10 22:57:42,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:42,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563127012] [2021-03-10 22:57:42,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:42,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563127012] [2021-03-10 22:57:42,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701628364] [2021-03-10 22:57:42,631 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 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 [2021-03-10 22:57:42,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:57:42,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:42,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:57:42,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:42,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:42,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 22:57:42,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446168853] [2021-03-10 22:57:42,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:57:42,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:42,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:57:42,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:57:42,936 INFO L87 Difference]: Start difference. First operand 260 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:44,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:44,006 INFO L93 Difference]: Finished difference Result 487 states and 1030 transitions. [2021-03-10 22:57:44,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 22:57:44,007 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:57:44,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:44,008 INFO L225 Difference]: With dead ends: 487 [2021-03-10 22:57:44,009 INFO L226 Difference]: Without dead ends: 466 [2021-03-10 22:57:44,009 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 998.4ms TimeCoverageRelationStatistics Valid=486, Invalid=2820, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 22:57:44,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-03-10 22:57:44,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 260. [2021-03-10 22:57:44,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.4208494208494207) internal successors, (627), 259 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:44,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 627 transitions. [2021-03-10 22:57:44,015 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 627 transitions. Word has length 25 [2021-03-10 22:57:44,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:44,016 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 627 transitions. [2021-03-10 22:57:44,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:44,016 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 627 transitions. [2021-03-10 22:57:44,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:57:44,016 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:44,016 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:44,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:44,223 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:44,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:44,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1364920505, now seen corresponding path program 27 times [2021-03-10 22:57:44,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:44,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096797664] [2021-03-10 22:57:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:44,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096797664] [2021-03-10 22:57:44,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070499026] [2021-03-10 22:57:44,338 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 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 [2021-03-10 22:57:44,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:57:44,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:44,355 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:57:44,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:44,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:44,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 22:57:44,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98053901] [2021-03-10 22:57:44,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:57:44,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:44,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:57:44,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:57:44,622 INFO L87 Difference]: Start difference. First operand 260 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:45,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:45,431 INFO L93 Difference]: Finished difference Result 352 states and 772 transitions. [2021-03-10 22:57:45,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 22:57:45,431 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:57:45,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:45,432 INFO L225 Difference]: With dead ends: 352 [2021-03-10 22:57:45,432 INFO L226 Difference]: Without dead ends: 331 [2021-03-10 22:57:45,433 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 787.5ms TimeCoverageRelationStatistics Valid=334, Invalid=2116, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 22:57:45,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-03-10 22:57:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 262. [2021-03-10 22:57:45,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.413793103448276) internal successors, (630), 261 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:45,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 630 transitions. [2021-03-10 22:57:45,438 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 630 transitions. Word has length 25 [2021-03-10 22:57:45,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:45,438 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 630 transitions. [2021-03-10 22:57:45,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:45,438 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 630 transitions. [2021-03-10 22:57:45,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:57:45,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:45,439 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:45,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 22:57:45,656 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:45,656 INFO L82 PathProgramCache]: Analyzing trace with hash 740880809, now seen corresponding path program 28 times [2021-03-10 22:57:45,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:45,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440049953] [2021-03-10 22:57:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:45,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440049953] [2021-03-10 22:57:45,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047533733] [2021-03-10 22:57:45,781 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 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 [2021-03-10 22:57:45,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:57:45,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:45,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:57:45,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:46,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:46,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 22:57:46,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910192042] [2021-03-10 22:57:46,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:57:46,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:46,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:57:46,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:57:46,041 INFO L87 Difference]: Start difference. First operand 262 states and 630 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:47,434 INFO L93 Difference]: Finished difference Result 717 states and 1516 transitions. [2021-03-10 22:57:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 22:57:47,434 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:57:47,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:47,436 INFO L225 Difference]: With dead ends: 717 [2021-03-10 22:57:47,436 INFO L226 Difference]: Without dead ends: 676 [2021-03-10 22:57:47,437 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 1146.8ms TimeCoverageRelationStatistics Valid=575, Invalid=3585, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 22:57:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-03-10 22:57:47,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 377. [2021-03-10 22:57:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.5) internal successors, (940), 376 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 940 transitions. [2021-03-10 22:57:47,445 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 940 transitions. Word has length 25 [2021-03-10 22:57:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:47,445 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 940 transitions. [2021-03-10 22:57:47,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 940 transitions. [2021-03-10 22:57:47,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:57:47,446 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:47,446 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:47,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:47,651 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:47,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:47,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1390949779, now seen corresponding path program 29 times [2021-03-10 22:57:47,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:47,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358704003] [2021-03-10 22:57:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:47,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358704003] [2021-03-10 22:57:47,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458935384] [2021-03-10 22:57:47,768 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 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 [2021-03-10 22:57:47,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:57:47,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:47,788 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:57:47,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:48,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:48,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 22:57:48,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226483273] [2021-03-10 22:57:48,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:57:48,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:48,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:57:48,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:57:48,049 INFO L87 Difference]: Start difference. First operand 377 states and 940 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:49,446 INFO L93 Difference]: Finished difference Result 681 states and 1442 transitions. [2021-03-10 22:57:49,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 22:57:49,446 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:57:49,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:49,448 INFO L225 Difference]: With dead ends: 681 [2021-03-10 22:57:49,449 INFO L226 Difference]: Without dead ends: 646 [2021-03-10 22:57:49,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1233.0ms TimeCoverageRelationStatistics Valid=619, Invalid=3937, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 22:57:49,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-03-10 22:57:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 338. [2021-03-10 22:57:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.4391691394658754) internal successors, (822), 337 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:49,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 822 transitions. [2021-03-10 22:57:49,457 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 822 transitions. Word has length 25 [2021-03-10 22:57:49,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:49,457 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 822 transitions. [2021-03-10 22:57:49,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:49,457 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 822 transitions. [2021-03-10 22:57:49,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:57:49,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:49,458 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:49,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 22:57:49,671 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:49,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:49,672 INFO L82 PathProgramCache]: Analyzing trace with hash -669910023, now seen corresponding path program 30 times [2021-03-10 22:57:49,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:49,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717404092] [2021-03-10 22:57:49,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:49,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717404092] [2021-03-10 22:57:49,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150393965] [2021-03-10 22:57:49,786 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 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 [2021-03-10 22:57:49,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:57:49,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:49,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:57:49,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:50,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:50,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 22:57:50,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354538587] [2021-03-10 22:57:50,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:57:50,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:50,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:57:50,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:57:50,053 INFO L87 Difference]: Start difference. First operand 338 states and 822 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:50,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:50,920 INFO L93 Difference]: Finished difference Result 462 states and 1027 transitions. [2021-03-10 22:57:50,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 22:57:50,921 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:57:50,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:50,922 INFO L225 Difference]: With dead ends: 462 [2021-03-10 22:57:50,922 INFO L226 Difference]: Without dead ends: 441 [2021-03-10 22:57:50,923 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 792.4ms TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 22:57:50,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-03-10 22:57:50,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 325. [2021-03-10 22:57:50,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.4382716049382718) internal successors, (790), 324 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:50,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 790 transitions. [2021-03-10 22:57:50,928 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 790 transitions. Word has length 25 [2021-03-10 22:57:50,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:50,928 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 790 transitions. [2021-03-10 22:57:50,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:50,928 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 790 transitions. [2021-03-10 22:57:50,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:57:50,929 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:50,929 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:51,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:51,139 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:51,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:51,139 INFO L82 PathProgramCache]: Analyzing trace with hash -271811723, now seen corresponding path program 31 times [2021-03-10 22:57:51,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:51,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048852123] [2021-03-10 22:57:51,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:51,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048852123] [2021-03-10 22:57:51,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977299957] [2021-03-10 22:57:51,247 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 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 [2021-03-10 22:57:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:51,265 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:57:51,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:51,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:51,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 22:57:51,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308626991] [2021-03-10 22:57:51,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:57:51,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:51,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:57:51,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:57:51,501 INFO L87 Difference]: Start difference. First operand 325 states and 790 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:53,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:53,168 INFO L93 Difference]: Finished difference Result 880 states and 1876 transitions. [2021-03-10 22:57:53,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 22:57:53,169 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:57:53,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:53,172 INFO L225 Difference]: With dead ends: 880 [2021-03-10 22:57:53,172 INFO L226 Difference]: Without dead ends: 836 [2021-03-10 22:57:53,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 1444.4ms TimeCoverageRelationStatistics Valid=839, Invalid=5013, Unknown=0, NotChecked=0, Total=5852 [2021-03-10 22:57:53,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-03-10 22:57:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 447. [2021-03-10 22:57:53,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.5515695067264574) internal successors, (1138), 446 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:53,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1138 transitions. [2021-03-10 22:57:53,182 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1138 transitions. Word has length 25 [2021-03-10 22:57:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:53,182 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1138 transitions. [2021-03-10 22:57:53,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:53,182 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1138 transitions. [2021-03-10 22:57:53,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:57:53,183 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:53,183 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:53,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 22:57:53,400 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:53,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:53,400 INFO L82 PathProgramCache]: Analyzing trace with hash 378257247, now seen corresponding path program 32 times [2021-03-10 22:57:53,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:53,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747803112] [2021-03-10 22:57:53,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:53,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747803112] [2021-03-10 22:57:53,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705850429] [2021-03-10 22:57:53,517 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 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 [2021-03-10 22:57:53,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:57:53,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:53,536 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:57:53,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:53,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:53,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 22:57:53,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974833074] [2021-03-10 22:57:53,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:57:53,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:53,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:57:53,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:57:53,804 INFO L87 Difference]: Start difference. First operand 447 states and 1138 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:55,567 INFO L93 Difference]: Finished difference Result 844 states and 1797 transitions. [2021-03-10 22:57:55,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-10 22:57:55,567 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:57:55,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:55,570 INFO L225 Difference]: With dead ends: 844 [2021-03-10 22:57:55,570 INFO L226 Difference]: Without dead ends: 809 [2021-03-10 22:57:55,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 1615.2ms TimeCoverageRelationStatistics Valid=912, Invalid=5568, Unknown=0, NotChecked=0, Total=6480 [2021-03-10 22:57:55,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-03-10 22:57:55,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 337. [2021-03-10 22:57:55,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.5) internal successors, (840), 336 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 840 transitions. [2021-03-10 22:57:55,578 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 840 transitions. Word has length 25 [2021-03-10 22:57:55,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:55,578 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 840 transitions. [2021-03-10 22:57:55,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:55,578 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 840 transitions. [2021-03-10 22:57:55,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:57:55,579 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:55,579 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:55,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 22:57:55,785 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:55,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:55,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1682602555, now seen corresponding path program 33 times [2021-03-10 22:57:55,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:55,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708359116] [2021-03-10 22:57:55,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:55,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708359116] [2021-03-10 22:57:55,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528753247] [2021-03-10 22:57:55,900 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 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 [2021-03-10 22:57:55,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:57:55,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:55,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:57:55,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:56,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:56,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 22:57:56,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755281613] [2021-03-10 22:57:56,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:57:56,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:56,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:57:56,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:57:56,165 INFO L87 Difference]: Start difference. First operand 337 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:57,327 INFO L93 Difference]: Finished difference Result 539 states and 1176 transitions. [2021-03-10 22:57:57,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 22:57:57,328 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:57:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:57,330 INFO L225 Difference]: With dead ends: 539 [2021-03-10 22:57:57,330 INFO L226 Difference]: Without dead ends: 518 [2021-03-10 22:57:57,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1086.1ms TimeCoverageRelationStatistics Valid=567, Invalid=3593, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 22:57:57,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-03-10 22:57:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 336. [2021-03-10 22:57:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.5194029850746267) internal successors, (844), 335 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 844 transitions. [2021-03-10 22:57:57,335 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 844 transitions. Word has length 25 [2021-03-10 22:57:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:57,335 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 844 transitions. [2021-03-10 22:57:57,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:57,335 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 844 transitions. [2021-03-10 22:57:57,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:57:57,336 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:57,336 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:57,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 22:57:57,548 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:57,548 INFO L82 PathProgramCache]: Analyzing trace with hash 2077134939, now seen corresponding path program 34 times [2021-03-10 22:57:57,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:57,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273239045] [2021-03-10 22:57:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:57,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273239045] [2021-03-10 22:57:57,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654716831] [2021-03-10 22:57:57,669 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:57:57,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:57:57,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:57,690 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:57:57,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:57,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:57,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 22:57:57,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370048796] [2021-03-10 22:57:57,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:57:57,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:57,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:57:57,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:57:57,953 INFO L87 Difference]: Start difference. First operand 336 states and 844 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:58,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:58,882 INFO L93 Difference]: Finished difference Result 477 states and 1063 transitions. [2021-03-10 22:57:58,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 22:57:58,882 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:57:58,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:58,884 INFO L225 Difference]: With dead ends: 477 [2021-03-10 22:57:58,884 INFO L226 Difference]: Without dead ends: 424 [2021-03-10 22:57:58,884 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 869.9ms TimeCoverageRelationStatistics Valid=406, Invalid=2350, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 22:57:58,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-03-10 22:57:58,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 329. [2021-03-10 22:57:58,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.3780487804878048) internal successors, (780), 328 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:58,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 780 transitions. [2021-03-10 22:57:58,889 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 780 transitions. Word has length 25 [2021-03-10 22:57:58,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:58,889 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 780 transitions. [2021-03-10 22:57:58,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:58,889 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 780 transitions. [2021-03-10 22:57:58,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:57:58,890 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:58,890 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:59,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 22:57:59,099 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:59,100 INFO L82 PathProgramCache]: Analyzing trace with hash -58193473, now seen corresponding path program 35 times [2021-03-10 22:57:59,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:59,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672509340] [2021-03-10 22:57:59,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:59,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672509340] [2021-03-10 22:57:59,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999529648] [2021-03-10 22:57:59,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:59,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:57:59,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:59,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:57:59,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:59,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:59,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-10 22:57:59,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782043630] [2021-03-10 22:57:59,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:57:59,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:59,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:57:59,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:57:59,662 INFO L87 Difference]: Start difference. First operand 329 states and 780 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-03-10 22:58:02,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:02,301 INFO L93 Difference]: Finished difference Result 585 states and 1283 transitions. [2021-03-10 22:58:02,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 22:58:02,302 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 25 [2021-03-10 22:58:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:02,303 INFO L225 Difference]: With dead ends: 585 [2021-03-10 22:58:02,303 INFO L226 Difference]: Without dead ends: 571 [2021-03-10 22:58:02,304 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 2558.7ms TimeCoverageRelationStatistics Valid=763, Invalid=3793, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 22:58:02,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-03-10 22:58:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 357. [2021-03-10 22:58:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.3820224719101124) internal successors, (848), 356 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:02,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 848 transitions. [2021-03-10 22:58:02,309 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 848 transitions. Word has length 25 [2021-03-10 22:58:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:02,310 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 848 transitions. [2021-03-10 22:58:02,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-03-10 22:58:02,310 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 848 transitions. [2021-03-10 22:58:02,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:58:02,310 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:02,310 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:02,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 22:58:02,524 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:02,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:02,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2090603063, now seen corresponding path program 36 times [2021-03-10 22:58:02,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:02,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543840639] [2021-03-10 22:58:02,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:02,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543840639] [2021-03-10 22:58:02,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875923488] [2021-03-10 22:58:02,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:02,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:58:02,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:02,687 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:58:02,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:02,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:02,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 22:58:02,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162297892] [2021-03-10 22:58:02,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:58:02,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:02,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:58:02,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:58:02,925 INFO L87 Difference]: Start difference. First operand 357 states and 848 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:03,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:03,927 INFO L93 Difference]: Finished difference Result 661 states and 1415 transitions. [2021-03-10 22:58:03,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 22:58:03,927 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:58:03,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:03,929 INFO L225 Difference]: With dead ends: 661 [2021-03-10 22:58:03,929 INFO L226 Difference]: Without dead ends: 588 [2021-03-10 22:58:03,929 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 909.7ms TimeCoverageRelationStatistics Valid=460, Invalid=2296, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 22:58:03,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-03-10 22:58:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 415. [2021-03-10 22:58:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.314009661835749) internal successors, (958), 414 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 958 transitions. [2021-03-10 22:58:03,936 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 958 transitions. Word has length 25 [2021-03-10 22:58:03,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:03,936 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 958 transitions. [2021-03-10 22:58:03,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:03,936 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 958 transitions. [2021-03-10 22:58:03,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:58:03,937 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:03,937 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:04,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 22:58:04,154 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:04,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:04,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1554295263, now seen corresponding path program 37 times [2021-03-10 22:58:04,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:04,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868067923] [2021-03-10 22:58:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:04,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868067923] [2021-03-10 22:58:04,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115807896] [2021-03-10 22:58:04,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:04,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:58:04,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:04,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:04,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 22:58:04,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011014096] [2021-03-10 22:58:04,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:58:04,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:04,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:58:04,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:58:04,573 INFO L87 Difference]: Start difference. First operand 415 states and 958 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:05,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:05,672 INFO L93 Difference]: Finished difference Result 646 states and 1353 transitions. [2021-03-10 22:58:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 22:58:05,672 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:58:05,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:05,674 INFO L225 Difference]: With dead ends: 646 [2021-03-10 22:58:05,674 INFO L226 Difference]: Without dead ends: 625 [2021-03-10 22:58:05,675 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 985.2ms TimeCoverageRelationStatistics Valid=425, Invalid=2437, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 22:58:05,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-03-10 22:58:05,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 416. [2021-03-10 22:58:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.3180722891566266) internal successors, (962), 415 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 962 transitions. [2021-03-10 22:58:05,681 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 962 transitions. Word has length 25 [2021-03-10 22:58:05,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:05,681 INFO L480 AbstractCegarLoop]: Abstraction has 416 states and 962 transitions. [2021-03-10 22:58:05,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 962 transitions. [2021-03-10 22:58:05,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:58:05,682 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:05,682 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:05,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-03-10 22:58:05,895 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:05,896 INFO L82 PathProgramCache]: Analyzing trace with hash 679812231, now seen corresponding path program 38 times [2021-03-10 22:58:05,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:05,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920235473] [2021-03-10 22:58:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:06,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920235473] [2021-03-10 22:58:06,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394705490] [2021-03-10 22:58:06,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:06,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:58:06,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:06,058 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:58:06,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:06,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:06,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 22:58:06,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219972459] [2021-03-10 22:58:06,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:58:06,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:06,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:58:06,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:58:06,337 INFO L87 Difference]: Start difference. First operand 416 states and 962 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:07,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:07,112 INFO L93 Difference]: Finished difference Result 531 states and 1157 transitions. [2021-03-10 22:58:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:58:07,112 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:58:07,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:07,114 INFO L225 Difference]: With dead ends: 531 [2021-03-10 22:58:07,114 INFO L226 Difference]: Without dead ends: 517 [2021-03-10 22:58:07,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 819.4ms TimeCoverageRelationStatistics Valid=285, Invalid=1785, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:58:07,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-03-10 22:58:07,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 418. [2021-03-10 22:58:07,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.3141486810551557) internal successors, (965), 417 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 965 transitions. [2021-03-10 22:58:07,120 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 965 transitions. Word has length 25 [2021-03-10 22:58:07,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:07,120 INFO L480 AbstractCegarLoop]: Abstraction has 418 states and 965 transitions. [2021-03-10 22:58:07,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:07,120 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 965 transitions. [2021-03-10 22:58:07,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:58:07,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:07,121 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:07,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:07,322 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:07,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:07,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1077910531, now seen corresponding path program 39 times [2021-03-10 22:58:07,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:07,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762556960] [2021-03-10 22:58:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:07,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762556960] [2021-03-10 22:58:07,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187725231] [2021-03-10 22:58:07,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:07,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:58:07,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:07,474 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:58:07,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:07,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:07,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 22:58:07,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923590343] [2021-03-10 22:58:07,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:58:07,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:07,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:58:07,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:58:07,723 INFO L87 Difference]: Start difference. First operand 418 states and 965 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:08,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:08,986 INFO L93 Difference]: Finished difference Result 579 states and 1222 transitions. [2021-03-10 22:58:08,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 22:58:08,986 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:58:08,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:08,988 INFO L225 Difference]: With dead ends: 579 [2021-03-10 22:58:08,988 INFO L226 Difference]: Without dead ends: 542 [2021-03-10 22:58:08,989 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 1207.0ms TimeCoverageRelationStatistics Valid=536, Invalid=3370, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 22:58:08,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-03-10 22:58:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 384. [2021-03-10 22:58:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.3159268929503916) internal successors, (887), 383 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:08,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 887 transitions. [2021-03-10 22:58:08,995 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 887 transitions. Word has length 25 [2021-03-10 22:58:08,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:08,995 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 887 transitions. [2021-03-10 22:58:08,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 887 transitions. [2021-03-10 22:58:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:58:08,996 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:08,996 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:09,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:09,213 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:09,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:09,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1727979501, now seen corresponding path program 40 times [2021-03-10 22:58:09,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:09,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816177963] [2021-03-10 22:58:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:09,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816177963] [2021-03-10 22:58:09,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839418407] [2021-03-10 22:58:09,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:09,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:58:09,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:09,347 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:58:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:09,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:09,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 22:58:09,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818199680] [2021-03-10 22:58:09,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:58:09,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:09,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:58:09,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:58:09,594 INFO L87 Difference]: Start difference. First operand 384 states and 887 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:10,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:10,924 INFO L93 Difference]: Finished difference Result 535 states and 1127 transitions. [2021-03-10 22:58:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 22:58:10,925 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:58:10,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:10,927 INFO L225 Difference]: With dead ends: 535 [2021-03-10 22:58:10,927 INFO L226 Difference]: Without dead ends: 505 [2021-03-10 22:58:10,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1296.7ms TimeCoverageRelationStatistics Valid=585, Invalid=3705, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 22:58:10,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-03-10 22:58:10,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 323. [2021-03-10 22:58:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.329192546583851) internal successors, (750), 322 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 750 transitions. [2021-03-10 22:58:10,932 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 750 transitions. Word has length 25 [2021-03-10 22:58:10,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:10,932 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 750 transitions. [2021-03-10 22:58:10,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 750 transitions. [2021-03-10 22:58:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:58:10,933 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:10,933 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:11,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:11,149 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:11,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:11,150 INFO L82 PathProgramCache]: Analyzing trace with hash -332880301, now seen corresponding path program 41 times [2021-03-10 22:58:11,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:11,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538980148] [2021-03-10 22:58:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:11,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538980148] [2021-03-10 22:58:11,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613906214] [2021-03-10 22:58:11,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:11,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:58:11,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:11,307 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 22:58:11,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:11,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:11,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 22:58:11,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563239527] [2021-03-10 22:58:11,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:58:11,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:11,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:58:11,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:58:11,598 INFO L87 Difference]: Start difference. First operand 323 states and 750 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:12,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:12,734 INFO L93 Difference]: Finished difference Result 466 states and 985 transitions. [2021-03-10 22:58:12,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 22:58:12,734 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:58:12,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:12,736 INFO L225 Difference]: With dead ends: 466 [2021-03-10 22:58:12,736 INFO L226 Difference]: Without dead ends: 445 [2021-03-10 22:58:12,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 1124.0ms TimeCoverageRelationStatistics Valid=431, Invalid=3109, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 22:58:12,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-03-10 22:58:12,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 322. [2021-03-10 22:58:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.3302180685358254) internal successors, (748), 321 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 748 transitions. [2021-03-10 22:58:12,741 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 748 transitions. Word has length 25 [2021-03-10 22:58:12,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:12,741 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 748 transitions. [2021-03-10 22:58:12,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:12,741 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 748 transitions. [2021-03-10 22:58:12,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:58:12,742 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:12,742 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:12,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 22:58:12,959 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:12,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:12,959 INFO L82 PathProgramCache]: Analyzing trace with hash -868110103, now seen corresponding path program 42 times [2021-03-10 22:58:12,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:12,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992964254] [2021-03-10 22:58:12,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:13,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992964254] [2021-03-10 22:58:13,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913656215] [2021-03-10 22:58:13,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:13,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:58:13,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:13,085 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:58:13,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:13,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:13,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 22:58:13,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105416172] [2021-03-10 22:58:13,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:58:13,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:13,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:58:13,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:58:13,329 INFO L87 Difference]: Start difference. First operand 322 states and 748 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:14,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:14,059 INFO L93 Difference]: Finished difference Result 429 states and 928 transitions. [2021-03-10 22:58:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:58:14,060 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:58:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:14,061 INFO L225 Difference]: With dead ends: 429 [2021-03-10 22:58:14,061 INFO L226 Difference]: Without dead ends: 376 [2021-03-10 22:58:14,062 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 721.8ms TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 22:58:14,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-03-10 22:58:14,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 314. [2021-03-10 22:58:14,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.306709265175719) internal successors, (722), 313 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:14,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 722 transitions. [2021-03-10 22:58:14,066 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 722 transitions. Word has length 25 [2021-03-10 22:58:14,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:14,066 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 722 transitions. [2021-03-10 22:58:14,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:14,066 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 722 transitions. [2021-03-10 22:58:14,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:58:14,066 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:14,066 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:14,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:14,282 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:14,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:14,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1839386049, now seen corresponding path program 43 times [2021-03-10 22:58:14,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:14,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713865215] [2021-03-10 22:58:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:14,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713865215] [2021-03-10 22:58:14,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599999110] [2021-03-10 22:58:14,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:14,503 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:58:14,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:14,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:14,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-10 22:58:14,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540823786] [2021-03-10 22:58:14,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:58:14,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:14,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:58:14,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:58:14,837 INFO L87 Difference]: Start difference. First operand 314 states and 722 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-03-10 22:58:17,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:17,279 INFO L93 Difference]: Finished difference Result 480 states and 1038 transitions. [2021-03-10 22:58:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-10 22:58:17,279 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 25 [2021-03-10 22:58:17,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:17,281 INFO L225 Difference]: With dead ends: 480 [2021-03-10 22:58:17,281 INFO L226 Difference]: Without dead ends: 466 [2021-03-10 22:58:17,282 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 2416.5ms TimeCoverageRelationStatistics Valid=612, Invalid=3294, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 22:58:17,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-03-10 22:58:17,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 316. [2021-03-10 22:58:17,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.3079365079365077) internal successors, (727), 315 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:17,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 727 transitions. [2021-03-10 22:58:17,286 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 727 transitions. Word has length 25 [2021-03-10 22:58:17,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:17,286 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 727 transitions. [2021-03-10 22:58:17,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-03-10 22:58:17,286 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 727 transitions. [2021-03-10 22:58:17,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:17,290 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:17,290 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:17,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 22:58:17,507 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:17,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:17,508 INFO L82 PathProgramCache]: Analyzing trace with hash 857611235, now seen corresponding path program 44 times [2021-03-10 22:58:17,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:17,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107691487] [2021-03-10 22:58:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:17,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107691487] [2021-03-10 22:58:17,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751180102] [2021-03-10 22:58:17,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:17,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:58:17,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:17,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:58:17,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:18,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:18,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 22:58:18,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101966591] [2021-03-10 22:58:18,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 22:58:18,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:18,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 22:58:18,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:58:18,032 INFO L87 Difference]: Start difference. First operand 316 states and 727 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:19,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:19,355 INFO L93 Difference]: Finished difference Result 578 states and 1234 transitions. [2021-03-10 22:58:19,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 22:58:19,355 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-03-10 22:58:19,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:19,357 INFO L225 Difference]: With dead ends: 578 [2021-03-10 22:58:19,357 INFO L226 Difference]: Without dead ends: 529 [2021-03-10 22:58:19,357 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1379.8ms TimeCoverageRelationStatistics Valid=557, Invalid=3603, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 22:58:19,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-03-10 22:58:19,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 389. [2021-03-10 22:58:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.36340206185567) internal successors, (917), 388 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 917 transitions. [2021-03-10 22:58:19,363 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 917 transitions. Word has length 27 [2021-03-10 22:58:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:19,363 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 917 transitions. [2021-03-10 22:58:19,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:19,363 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 917 transitions. [2021-03-10 22:58:19,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:19,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:19,364 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:19,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 22:58:19,579 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:19,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1087323029, now seen corresponding path program 45 times [2021-03-10 22:58:19,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:19,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008050882] [2021-03-10 22:58:19,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:19,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008050882] [2021-03-10 22:58:19,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749237935] [2021-03-10 22:58:19,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:19,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:58:19,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:19,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:58:19,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:20,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:20,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 22:58:20,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327582792] [2021-03-10 22:58:20,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 22:58:20,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:20,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 22:58:20,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:58:20,103 INFO L87 Difference]: Start difference. First operand 389 states and 917 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:21,613 INFO L93 Difference]: Finished difference Result 602 states and 1279 transitions. [2021-03-10 22:58:21,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 22:58:21,614 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-03-10 22:58:21,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:21,616 INFO L225 Difference]: With dead ends: 602 [2021-03-10 22:58:21,616 INFO L226 Difference]: Without dead ends: 564 [2021-03-10 22:58:21,616 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1485.1ms TimeCoverageRelationStatistics Valid=641, Invalid=4189, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 22:58:21,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-03-10 22:58:21,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 392. [2021-03-10 22:58:21,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.360613810741688) internal successors, (923), 391 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 923 transitions. [2021-03-10 22:58:21,622 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 923 transitions. Word has length 27 [2021-03-10 22:58:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:21,622 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 923 transitions. [2021-03-10 22:58:21,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 923 transitions. [2021-03-10 22:58:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:21,623 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:21,623 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:21,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:21,835 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:21,836 INFO L82 PathProgramCache]: Analyzing trace with hash -254898513, now seen corresponding path program 46 times [2021-03-10 22:58:21,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:21,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790893057] [2021-03-10 22:58:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:22,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790893057] [2021-03-10 22:58:22,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050621766] [2021-03-10 22:58:22,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:22,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:58:22,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:22,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:58:22,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:22,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:22,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 22:58:22,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81306701] [2021-03-10 22:58:22,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 22:58:22,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:22,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 22:58:22,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:58:22,409 INFO L87 Difference]: Start difference. First operand 392 states and 923 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:24,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:24,216 INFO L93 Difference]: Finished difference Result 695 states and 1437 transitions. [2021-03-10 22:58:24,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 22:58:24,216 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-03-10 22:58:24,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:24,218 INFO L225 Difference]: With dead ends: 695 [2021-03-10 22:58:24,218 INFO L226 Difference]: Without dead ends: 656 [2021-03-10 22:58:24,218 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 1763.1ms TimeCoverageRelationStatistics Valid=744, Invalid=4806, Unknown=0, NotChecked=0, Total=5550 [2021-03-10 22:58:24,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-03-10 22:58:24,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 398. [2021-03-10 22:58:24,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.367758186397985) internal successors, (940), 397 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 940 transitions. [2021-03-10 22:58:24,224 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 940 transitions. Word has length 27 [2021-03-10 22:58:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:24,224 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 940 transitions. [2021-03-10 22:58:24,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:24,224 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 940 transitions. [2021-03-10 22:58:24,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:24,225 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:24,225 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:24,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-03-10 22:58:24,425 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:24,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:24,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1519826373, now seen corresponding path program 47 times [2021-03-10 22:58:24,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:24,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836403175] [2021-03-10 22:58:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:24,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836403175] [2021-03-10 22:58:24,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664942511] [2021-03-10 22:58:24,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:58:24,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:58:24,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:24,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:58:24,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:24,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:24,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 22:58:24,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400174272] [2021-03-10 22:58:24,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 22:58:24,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:24,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 22:58:24,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:58:24,960 INFO L87 Difference]: Start difference. First operand 398 states and 940 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:26,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:26,581 INFO L93 Difference]: Finished difference Result 650 states and 1350 transitions. [2021-03-10 22:58:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 22:58:26,582 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-03-10 22:58:26,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:26,584 INFO L225 Difference]: With dead ends: 650 [2021-03-10 22:58:26,584 INFO L226 Difference]: Without dead ends: 623 [2021-03-10 22:58:26,584 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1566.0ms TimeCoverageRelationStatistics Valid=692, Invalid=4138, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 22:58:26,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-03-10 22:58:26,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 399. [2021-03-10 22:58:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.3668341708542715) internal successors, (942), 398 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 942 transitions. [2021-03-10 22:58:26,590 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 942 transitions. Word has length 27 [2021-03-10 22:58:26,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:26,590 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 942 transitions. [2021-03-10 22:58:26,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:26,590 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 942 transitions. [2021-03-10 22:58:26,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:26,590 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:26,591 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:26,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:26,791 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:26,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:26,791 INFO L82 PathProgramCache]: Analyzing trace with hash -383641101, now seen corresponding path program 48 times [2021-03-10 22:58:26,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:26,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40489781] [2021-03-10 22:58:26,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:26,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40489781] [2021-03-10 22:58:26,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488224569] [2021-03-10 22:58:26,986 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:58:27,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:58:27,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:27,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:58:27,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:27,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:27,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 22:58:27,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691762097] [2021-03-10 22:58:27,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 22:58:27,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:27,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 22:58:27,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:58:27,327 INFO L87 Difference]: Start difference. First operand 399 states and 942 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:29,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:29,036 INFO L93 Difference]: Finished difference Result 671 states and 1386 transitions. [2021-03-10 22:58:29,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 22:58:29,037 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-03-10 22:58:29,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:29,039 INFO L225 Difference]: With dead ends: 671 [2021-03-10 22:58:29,039 INFO L226 Difference]: Without dead ends: 647 [2021-03-10 22:58:29,040 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 1581.6ms TimeCoverageRelationStatistics Valid=763, Invalid=4349, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 22:58:29,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-03-10 22:58:29,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 402. [2021-03-10 22:58:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.369077306733167) internal successors, (950), 401 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 950 transitions. [2021-03-10 22:58:29,046 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 950 transitions. Word has length 27 [2021-03-10 22:58:29,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:29,046 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 950 transitions. [2021-03-10 22:58:29,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:29,046 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 950 transitions. [2021-03-10 22:58:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:29,047 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:29,047 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:29,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:29,254 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:29,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:29,254 INFO L82 PathProgramCache]: Analyzing trace with hash 266427869, now seen corresponding path program 49 times [2021-03-10 22:58:29,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:29,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305313712] [2021-03-10 22:58:29,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:29,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305313712] [2021-03-10 22:58:29,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710797592] [2021-03-10 22:58:29,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:29,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:58:29,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:29,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:29,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 22:58:29,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526828741] [2021-03-10 22:58:29,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 22:58:29,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:29,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 22:58:29,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:58:29,730 INFO L87 Difference]: Start difference. First operand 402 states and 950 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:31,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:31,618 INFO L93 Difference]: Finished difference Result 699 states and 1488 transitions. [2021-03-10 22:58:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 22:58:31,619 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-03-10 22:58:31,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:31,621 INFO L225 Difference]: With dead ends: 699 [2021-03-10 22:58:31,621 INFO L226 Difference]: Without dead ends: 676 [2021-03-10 22:58:31,622 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1732.7ms TimeCoverageRelationStatistics Valid=873, Invalid=4827, Unknown=0, NotChecked=0, Total=5700 [2021-03-10 22:58:31,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-03-10 22:58:31,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 422. [2021-03-10 22:58:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.36104513064133) internal successors, (994), 421 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:31,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 994 transitions. [2021-03-10 22:58:31,628 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 994 transitions. Word has length 27 [2021-03-10 22:58:31,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:31,628 INFO L480 AbstractCegarLoop]: Abstraction has 422 states and 994 transitions. [2021-03-10 22:58:31,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:31,628 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 994 transitions. [2021-03-10 22:58:31,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:31,629 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:31,629 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:31,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-10 22:58:31,830 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:31,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:31,830 INFO L82 PathProgramCache]: Analyzing trace with hash 209025461, now seen corresponding path program 50 times [2021-03-10 22:58:31,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:31,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888932374] [2021-03-10 22:58:31,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:32,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888932374] [2021-03-10 22:58:32,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584901990] [2021-03-10 22:58:32,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:58:32,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:58:32,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:32,029 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:58:32,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:32,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:32,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 22:58:32,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169186358] [2021-03-10 22:58:32,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 22:58:32,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:32,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 22:58:32,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:58:32,342 INFO L87 Difference]: Start difference. First operand 422 states and 994 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:34,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:34,748 INFO L93 Difference]: Finished difference Result 792 states and 1672 transitions. [2021-03-10 22:58:34,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-10 22:58:34,748 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-03-10 22:58:34,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:34,751 INFO L225 Difference]: With dead ends: 792 [2021-03-10 22:58:34,751 INFO L226 Difference]: Without dead ends: 750 [2021-03-10 22:58:34,751 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 2159.9ms TimeCoverageRelationStatistics Valid=838, Invalid=5642, Unknown=0, NotChecked=0, Total=6480 [2021-03-10 22:58:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-03-10 22:58:34,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 482. [2021-03-10 22:58:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.3866943866943866) internal successors, (1148), 481 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1148 transitions. [2021-03-10 22:58:34,758 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1148 transitions. Word has length 27 [2021-03-10 22:58:34,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:34,758 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 1148 transitions. [2021-03-10 22:58:34,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1148 transitions. [2021-03-10 22:58:34,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:34,759 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:34,759 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:34,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:34,975 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:34,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:34,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1055902399, now seen corresponding path program 51 times [2021-03-10 22:58:34,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:34,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853296335] [2021-03-10 22:58:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:35,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853296335] [2021-03-10 22:58:35,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725772143] [2021-03-10 22:58:35,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:35,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:58:35,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:35,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:58:35,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:35,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:35,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 22:58:35,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391019569] [2021-03-10 22:58:35,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 22:58:35,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:35,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 22:58:35,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:58:35,502 INFO L87 Difference]: Start difference. First operand 482 states and 1148 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:37,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:37,515 INFO L93 Difference]: Finished difference Result 763 states and 1624 transitions. [2021-03-10 22:58:37,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-10 22:58:37,515 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-03-10 22:58:37,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:37,517 INFO L225 Difference]: With dead ends: 763 [2021-03-10 22:58:37,517 INFO L226 Difference]: Without dead ends: 736 [2021-03-10 22:58:37,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 1890.3ms TimeCoverageRelationStatistics Valid=794, Invalid=4906, Unknown=0, NotChecked=0, Total=5700 [2021-03-10 22:58:37,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-03-10 22:58:37,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 480. [2021-03-10 22:58:37,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.363256784968685) internal successors, (1132), 479 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1132 transitions. [2021-03-10 22:58:37,525 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1132 transitions. Word has length 27 [2021-03-10 22:58:37,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:37,525 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 1132 transitions. [2021-03-10 22:58:37,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:37,525 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1132 transitions. [2021-03-10 22:58:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:37,526 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:37,526 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:37,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-10 22:58:37,741 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:37,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:37,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1174374461, now seen corresponding path program 52 times [2021-03-10 22:58:37,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:37,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170541008] [2021-03-10 22:58:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:37,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170541008] [2021-03-10 22:58:37,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539645632] [2021-03-10 22:58:37,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:37,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:58:37,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:37,935 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:58:37,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:38,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:38,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 22:58:38,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585948726] [2021-03-10 22:58:38,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 22:58:38,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:38,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 22:58:38,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:58:38,219 INFO L87 Difference]: Start difference. First operand 480 states and 1132 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:39,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:39,990 INFO L93 Difference]: Finished difference Result 760 states and 1660 transitions. [2021-03-10 22:58:39,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 22:58:39,991 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-03-10 22:58:39,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:39,992 INFO L225 Difference]: With dead ends: 760 [2021-03-10 22:58:39,993 INFO L226 Difference]: Without dead ends: 736 [2021-03-10 22:58:39,993 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 1674.5ms TimeCoverageRelationStatistics Valid=730, Invalid=3826, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 22:58:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-03-10 22:58:39,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 506. [2021-03-10 22:58:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.37029702970297) internal successors, (1197), 505 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1197 transitions. [2021-03-10 22:58:39,999 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1197 transitions. Word has length 27 [2021-03-10 22:58:39,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:39,999 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1197 transitions. [2021-03-10 22:58:40,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:40,000 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1197 transitions. [2021-03-10 22:58:40,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:40,000 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:40,000 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:40,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-10 22:58:40,201 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:40,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:40,201 INFO L82 PathProgramCache]: Analyzing trace with hash -52082337, now seen corresponding path program 53 times [2021-03-10 22:58:40,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:40,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370106011] [2021-03-10 22:58:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:40,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370106011] [2021-03-10 22:58:40,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157078633] [2021-03-10 22:58:40,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:40,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:58:40,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:40,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:58:40,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:40,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:40,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 22:58:40,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27278052] [2021-03-10 22:58:40,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 22:58:40,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:40,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 22:58:40,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:58:40,646 INFO L87 Difference]: Start difference. First operand 506 states and 1197 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-03-10 22:58:42,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:42,093 INFO L93 Difference]: Finished difference Result 717 states and 1578 transitions. [2021-03-10 22:58:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 22:58:42,093 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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 27 [2021-03-10 22:58:42,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:42,095 INFO L225 Difference]: With dead ends: 717 [2021-03-10 22:58:42,095 INFO L226 Difference]: Without dead ends: 692 [2021-03-10 22:58:42,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1320.5ms TimeCoverageRelationStatistics Valid=617, Invalid=3805, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 22:58:42,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-03-10 22:58:42,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 441. [2021-03-10 22:58:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.3136363636363635) internal successors, (1018), 440 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1018 transitions. [2021-03-10 22:58:42,102 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1018 transitions. Word has length 27 [2021-03-10 22:58:42,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:42,102 INFO L480 AbstractCegarLoop]: Abstraction has 441 states and 1018 transitions. [2021-03-10 22:58:42,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-03-10 22:58:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1018 transitions. [2021-03-10 22:58:42,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:42,102 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:42,103 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:42,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-03-10 22:58:42,303 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:42,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:42,303 INFO L82 PathProgramCache]: Analyzing trace with hash -2112942139, now seen corresponding path program 54 times [2021-03-10 22:58:42,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:42,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513378461] [2021-03-10 22:58:42,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:42,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513378461] [2021-03-10 22:58:42,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090488457] [2021-03-10 22:58:42,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:42,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:58:42,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:42,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:58:42,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:42,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:42,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 22:58:42,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592112072] [2021-03-10 22:58:42,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 22:58:42,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:42,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 22:58:42,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:58:42,748 INFO L87 Difference]: Start difference. First operand 441 states and 1018 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-03-10 22:58:43,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:43,759 INFO L93 Difference]: Finished difference Result 652 states and 1423 transitions. [2021-03-10 22:58:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 22:58:43,759 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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 27 [2021-03-10 22:58:43,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:43,761 INFO L225 Difference]: With dead ends: 652 [2021-03-10 22:58:43,761 INFO L226 Difference]: Without dead ends: 638 [2021-03-10 22:58:43,761 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 968.0ms TimeCoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 22:58:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-03-10 22:58:43,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 519. [2021-03-10 22:58:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 2.2915057915057915) internal successors, (1187), 518 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:43,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1187 transitions. [2021-03-10 22:58:43,767 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1187 transitions. Word has length 27 [2021-03-10 22:58:43,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:43,767 INFO L480 AbstractCegarLoop]: Abstraction has 519 states and 1187 transitions. [2021-03-10 22:58:43,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-03-10 22:58:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1187 transitions. [2021-03-10 22:58:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:43,767 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:43,768 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:43,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:43,968 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:43,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:43,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1169332625, now seen corresponding path program 55 times [2021-03-10 22:58:43,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:43,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178529972] [2021-03-10 22:58:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:44,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178529972] [2021-03-10 22:58:44,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890842905] [2021-03-10 22:58:44,123 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 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 [2021-03-10 22:58:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:44,140 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:58:44,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:44,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:44,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 22:58:44,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948631947] [2021-03-10 22:58:44,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 22:58:44,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:44,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 22:58:44,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:58:44,422 INFO L87 Difference]: Start difference. First operand 519 states and 1187 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-03-10 22:58:45,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:45,550 INFO L93 Difference]: Finished difference Result 692 states and 1496 transitions. [2021-03-10 22:58:45,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 22:58:45,550 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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 27 [2021-03-10 22:58:45,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:45,551 INFO L225 Difference]: With dead ends: 692 [2021-03-10 22:58:45,552 INFO L226 Difference]: Without dead ends: 653 [2021-03-10 22:58:45,552 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1120.7ms TimeCoverageRelationStatistics Valid=547, Invalid=3235, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 22:58:45,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-03-10 22:58:45,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 445. [2021-03-10 22:58:45,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.2995495495495497) internal successors, (1021), 444 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1021 transitions. [2021-03-10 22:58:45,561 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1021 transitions. Word has length 27 [2021-03-10 22:58:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:45,561 INFO L480 AbstractCegarLoop]: Abstraction has 445 states and 1021 transitions. [2021-03-10 22:58:45,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-03-10 22:58:45,562 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1021 transitions. [2021-03-10 22:58:45,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:45,562 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:45,562 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:45,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:45,777 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:45,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:45,778 INFO L82 PathProgramCache]: Analyzing trace with hash 634102823, now seen corresponding path program 56 times [2021-03-10 22:58:45,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:45,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852032883] [2021-03-10 22:58:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:45,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852032883] [2021-03-10 22:58:45,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245698397] [2021-03-10 22:58:45,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:58:45,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:58:45,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:45,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:58:45,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:46,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:46,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-03-10 22:58:46,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350661536] [2021-03-10 22:58:46,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 22:58:46,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:46,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 22:58:46,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:58:46,222 INFO L87 Difference]: Start difference. First operand 445 states and 1021 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-03-10 22:58:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:46,945 INFO L93 Difference]: Finished difference Result 571 states and 1246 transitions. [2021-03-10 22:58:46,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:58:46,946 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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 27 [2021-03-10 22:58:46,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:46,947 INFO L225 Difference]: With dead ends: 571 [2021-03-10 22:58:46,947 INFO L226 Difference]: Without dead ends: 533 [2021-03-10 22:58:46,947 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 812.7ms TimeCoverageRelationStatistics Valid=356, Invalid=1996, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 22:58:46,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-03-10 22:58:46,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 415. [2021-03-10 22:58:46,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.1449275362318843) internal successors, (888), 414 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:46,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 888 transitions. [2021-03-10 22:58:46,952 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 888 transitions. Word has length 27 [2021-03-10 22:58:46,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:46,952 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 888 transitions. [2021-03-10 22:58:46,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-03-10 22:58:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 888 transitions. [2021-03-10 22:58:46,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:46,952 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:46,953 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:47,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:47,153 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:47,153 INFO L82 PathProgramCache]: Analyzing trace with hash 177512313, now seen corresponding path program 57 times [2021-03-10 22:58:47,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:47,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844338891] [2021-03-10 22:58:47,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:47,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844338891] [2021-03-10 22:58:47,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052631435] [2021-03-10 22:58:47,335 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 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 [2021-03-10 22:58:47,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:58:47,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:47,354 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:58:47,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:47,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:47,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 22:58:47,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993154669] [2021-03-10 22:58:47,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 22:58:47,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:47,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 22:58:47,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:58:47,628 INFO L87 Difference]: Start difference. First operand 415 states and 888 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:49,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:49,510 INFO L93 Difference]: Finished difference Result 582 states and 1181 transitions. [2021-03-10 22:58:49,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 22:58:49,510 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-03-10 22:58:49,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:49,511 INFO L225 Difference]: With dead ends: 582 [2021-03-10 22:58:49,511 INFO L226 Difference]: Without dead ends: 565 [2021-03-10 22:58:49,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 1778.2ms TimeCoverageRelationStatistics Valid=761, Invalid=4209, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 22:58:49,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-03-10 22:58:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 328. [2021-03-10 22:58:49,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.1376146788990824) internal successors, (699), 327 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:49,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 699 transitions. [2021-03-10 22:58:49,517 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 699 transitions. Word has length 27 [2021-03-10 22:58:49,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:49,517 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 699 transitions. [2021-03-10 22:58:49,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 22:58:49,518 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 699 transitions. [2021-03-10 22:58:49,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:58:49,518 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:49,518 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:49,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:49,727 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:49,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:49,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1680806143, now seen corresponding path program 58 times [2021-03-10 22:58:49,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:49,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281355336] [2021-03-10 22:58:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:58:49,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281355336] [2021-03-10 22:58:49,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802258456] [2021-03-10 22:58:49,774 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 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 [2021-03-10 22:58:49,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:58:49,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:49,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:58:49,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:58:49,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:49,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:58:49,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815377471] [2021-03-10 22:58:49,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:58:49,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:49,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:58:49,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:58:49,859 INFO L87 Difference]: Start difference. First operand 328 states and 699 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) [2021-03-10 22:58:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:49,933 INFO L93 Difference]: Finished difference Result 486 states and 1004 transitions. [2021-03-10 22:58:49,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:58:49,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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 27 [2021-03-10 22:58:49,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:49,934 INFO L225 Difference]: With dead ends: 486 [2021-03-10 22:58:49,934 INFO L226 Difference]: Without dead ends: 453 [2021-03-10 22:58:49,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:58:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-03-10 22:58:49,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 301. [2021-03-10 22:58:49,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.1333333333333333) internal successors, (640), 300 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 640 transitions. [2021-03-10 22:58:49,938 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 640 transitions. Word has length 27 [2021-03-10 22:58:49,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:49,939 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 640 transitions. [2021-03-10 22:58:49,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) [2021-03-10 22:58:49,939 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 640 transitions. [2021-03-10 22:58:49,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:58:49,939 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:49,939 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:50,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-10 22:58:50,143 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:50,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:50,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1310861107, now seen corresponding path program 59 times [2021-03-10 22:58:50,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:50,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734127431] [2021-03-10 22:58:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:50,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734127431] [2021-03-10 22:58:50,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244712151] [2021-03-10 22:58:50,327 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 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 [2021-03-10 22:58:50,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:58:50,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:50,347 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:58:50,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:50,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:50,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-03-10 22:58:50,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21958624] [2021-03-10 22:58:50,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 22:58:50,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:50,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 22:58:50,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:58:50,687 INFO L87 Difference]: Start difference. First operand 301 states and 640 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2021-03-10 22:58:52,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:52,011 INFO L93 Difference]: Finished difference Result 603 states and 1209 transitions. [2021-03-10 22:58:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 22:58:52,012 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 29 [2021-03-10 22:58:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:52,013 INFO L225 Difference]: With dead ends: 603 [2021-03-10 22:58:52,013 INFO L226 Difference]: Without dead ends: 575 [2021-03-10 22:58:52,013 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 1300.5ms TimeCoverageRelationStatistics Valid=632, Invalid=3924, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 22:58:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-03-10 22:58:52,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 320. [2021-03-10 22:58:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.1316614420062696) internal successors, (680), 319 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 680 transitions. [2021-03-10 22:58:52,018 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 680 transitions. Word has length 29 [2021-03-10 22:58:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:52,018 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 680 transitions. [2021-03-10 22:58:52,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2021-03-10 22:58:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 680 transitions. [2021-03-10 22:58:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:58:52,019 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:52,019 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:52,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:52,219 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:52,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:52,219 INFO L82 PathProgramCache]: Analyzing trace with hash 75290793, now seen corresponding path program 60 times [2021-03-10 22:58:52,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:52,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901693727] [2021-03-10 22:58:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:52,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901693727] [2021-03-10 22:58:52,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165693064] [2021-03-10 22:58:52,368 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:58:52,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:58:52,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:52,388 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:58:52,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:52,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:52,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-03-10 22:58:52,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348778291] [2021-03-10 22:58:52,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 22:58:52,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:52,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 22:58:52,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:58:52,715 INFO L87 Difference]: Start difference. First operand 320 states and 680 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-03-10 22:58:54,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:54,822 INFO L93 Difference]: Finished difference Result 793 states and 1575 transitions. [2021-03-10 22:58:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-03-10 22:58:54,823 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 29 [2021-03-10 22:58:54,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:54,824 INFO L225 Difference]: With dead ends: 793 [2021-03-10 22:58:54,824 INFO L226 Difference]: Without dead ends: 745 [2021-03-10 22:58:54,825 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 1774.0ms TimeCoverageRelationStatistics Valid=866, Invalid=6106, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 22:58:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-03-10 22:58:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 424. [2021-03-10 22:58:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.1465721040189125) internal successors, (908), 423 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:54,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 908 transitions. [2021-03-10 22:58:54,830 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 908 transitions. Word has length 29 [2021-03-10 22:58:54,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:54,830 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 908 transitions. [2021-03-10 22:58:54,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-03-10 22:58:54,830 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 908 transitions. [2021-03-10 22:58:54,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:58:54,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:54,831 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:55,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-10 22:58:55,042 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:55,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:55,042 INFO L82 PathProgramCache]: Analyzing trace with hash -937401739, now seen corresponding path program 61 times [2021-03-10 22:58:55,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:55,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101127450] [2021-03-10 22:58:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:55,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101127450] [2021-03-10 22:58:55,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535560764] [2021-03-10 22:58:55,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:55,195 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:58:55,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:55,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:55,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-03-10 22:58:55,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352867512] [2021-03-10 22:58:55,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 22:58:55,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:55,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 22:58:55,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:58:55,506 INFO L87 Difference]: Start difference. First operand 424 states and 908 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-03-10 22:58:58,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:58:58,058 INFO L93 Difference]: Finished difference Result 978 states and 1947 transitions. [2021-03-10 22:58:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-10 22:58:58,059 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 29 [2021-03-10 22:58:58,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:58:58,060 INFO L225 Difference]: With dead ends: 978 [2021-03-10 22:58:58,060 INFO L226 Difference]: Without dead ends: 927 [2021-03-10 22:58:58,061 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3389 ImplicationChecksByTransitivity, 2151.7ms TimeCoverageRelationStatistics Valid=1250, Invalid=8452, Unknown=0, NotChecked=0, Total=9702 [2021-03-10 22:58:58,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-03-10 22:58:58,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 410. [2021-03-10 22:58:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.1491442542787285) internal successors, (879), 409 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:58,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 879 transitions. [2021-03-10 22:58:58,067 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 879 transitions. Word has length 29 [2021-03-10 22:58:58,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:58,067 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 879 transitions. [2021-03-10 22:58:58,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-03-10 22:58:58,067 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 879 transitions. [2021-03-10 22:58:58,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:58:58,067 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:58,067 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:58:58,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:58,268 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:58,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:58,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1615340429, now seen corresponding path program 62 times [2021-03-10 22:58:58,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:58,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63548134] [2021-03-10 22:58:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:58,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63548134] [2021-03-10 22:58:58,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362491857] [2021-03-10 22:58:58,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:58,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:58:58,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:58,433 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:58:58,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:58:58,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:58,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-03-10 22:58:58,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391598216] [2021-03-10 22:58:58,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 22:58:58,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:58,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 22:58:58,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:58:58,774 INFO L87 Difference]: Start difference. First operand 410 states and 879 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-03-10 22:59:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:00,453 INFO L93 Difference]: Finished difference Result 668 states and 1344 transitions. [2021-03-10 22:59:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 22:59:00,454 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 29 [2021-03-10 22:59:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:00,455 INFO L225 Difference]: With dead ends: 668 [2021-03-10 22:59:00,455 INFO L226 Difference]: Without dead ends: 621 [2021-03-10 22:59:00,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1314.3ms TimeCoverageRelationStatistics Valid=467, Invalid=3955, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 22:59:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-03-10 22:59:00,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 425. [2021-03-10 22:59:00,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.1485849056603774) internal successors, (911), 424 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:00,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 911 transitions. [2021-03-10 22:59:00,460 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 911 transitions. Word has length 29 [2021-03-10 22:59:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:00,460 INFO L480 AbstractCegarLoop]: Abstraction has 425 states and 911 transitions. [2021-03-10 22:59:00,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-03-10 22:59:00,460 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 911 transitions. [2021-03-10 22:59:00,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:59:00,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:00,461 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:00,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 22:59:00,667 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:00,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:00,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1666934335, now seen corresponding path program 63 times [2021-03-10 22:59:00,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:00,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946536726] [2021-03-10 22:59:00,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:00,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946536726] [2021-03-10 22:59:00,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463210237] [2021-03-10 22:59:00,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:59:00,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:59:00,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:00,870 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 22:59:00,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:01,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:01,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-03-10 22:59:01,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153464324] [2021-03-10 22:59:01,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 22:59:01,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:01,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 22:59:01,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:59:01,273 INFO L87 Difference]: Start difference. First operand 425 states and 911 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-03-10 22:59:03,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:03,306 INFO L93 Difference]: Finished difference Result 699 states and 1402 transitions. [2021-03-10 22:59:03,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 22:59:03,307 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 29 [2021-03-10 22:59:03,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:03,308 INFO L225 Difference]: With dead ends: 699 [2021-03-10 22:59:03,308 INFO L226 Difference]: Without dead ends: 652 [2021-03-10 22:59:03,308 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 1907.7ms TimeCoverageRelationStatistics Valid=702, Invalid=4410, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 22:59:03,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-03-10 22:59:03,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 410. [2021-03-10 22:59:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.1589242053789732) internal successors, (883), 409 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 883 transitions. [2021-03-10 22:59:03,313 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 883 transitions. Word has length 29 [2021-03-10 22:59:03,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:03,313 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 883 transitions. [2021-03-10 22:59:03,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-03-10 22:59:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 883 transitions. [2021-03-10 22:59:03,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:59:03,313 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:03,313 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:03,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:03,529 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:03,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1440181891, now seen corresponding path program 64 times [2021-03-10 22:59:03,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:03,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196017937] [2021-03-10 22:59:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:03,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196017937] [2021-03-10 22:59:03,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323861524] [2021-03-10 22:59:03,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:03,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:59:03,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:03,821 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:59:03,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:04,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:04,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-03-10 22:59:04,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13863517] [2021-03-10 22:59:04,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 22:59:04,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:04,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 22:59:04,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:59:04,262 INFO L87 Difference]: Start difference. First operand 410 states and 883 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:07,148 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-03-10 22:59:07,573 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-03-10 22:59:07,741 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-03-10 22:59:08,005 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-10 22:59:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:08,979 INFO L93 Difference]: Finished difference Result 911 states and 1858 transitions. [2021-03-10 22:59:08,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-03-10 22:59:08,980 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:59:08,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:08,981 INFO L225 Difference]: With dead ends: 911 [2021-03-10 22:59:08,981 INFO L226 Difference]: Without dead ends: 862 [2021-03-10 22:59:08,981 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2740 ImplicationChecksByTransitivity, 4409.1ms TimeCoverageRelationStatistics Valid=1216, Invalid=6974, Unknown=0, NotChecked=0, Total=8190 [2021-03-10 22:59:08,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-03-10 22:59:08,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 479. [2021-03-10 22:59:08,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.1527196652719667) internal successors, (1029), 478 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1029 transitions. [2021-03-10 22:59:08,987 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1029 transitions. Word has length 29 [2021-03-10 22:59:08,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:08,988 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1029 transitions. [2021-03-10 22:59:08,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:08,988 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1029 transitions. [2021-03-10 22:59:08,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:59:08,988 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:08,988 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:09,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:09,189 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:09,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:09,189 INFO L82 PathProgramCache]: Analyzing trace with hash -303996619, now seen corresponding path program 65 times [2021-03-10 22:59:09,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:09,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875799867] [2021-03-10 22:59:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:09,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875799867] [2021-03-10 22:59:09,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422425480] [2021-03-10 22:59:09,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:09,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 22:59:09,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:09,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:59:09,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:09,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:09,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-03-10 22:59:09,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012702982] [2021-03-10 22:59:09,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 22:59:09,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:09,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 22:59:09,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:59:09,917 INFO L87 Difference]: Start difference. First operand 479 states and 1029 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:13,005 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-03-10 22:59:13,132 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-03-10 22:59:13,453 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-03-10 22:59:14,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:14,946 INFO L93 Difference]: Finished difference Result 910 states and 1863 transitions. [2021-03-10 22:59:14,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-03-10 22:59:14,947 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:59:14,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:14,948 INFO L225 Difference]: With dead ends: 910 [2021-03-10 22:59:14,948 INFO L226 Difference]: Without dead ends: 863 [2021-03-10 22:59:14,949 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 4767.8ms TimeCoverageRelationStatistics Valid=1530, Invalid=7782, Unknown=0, NotChecked=0, Total=9312 [2021-03-10 22:59:14,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-03-10 22:59:14,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 457. [2021-03-10 22:59:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 2.1578947368421053) internal successors, (984), 456 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 984 transitions. [2021-03-10 22:59:14,955 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 984 transitions. Word has length 29 [2021-03-10 22:59:14,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:14,955 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 984 transitions. [2021-03-10 22:59:14,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:14,955 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 984 transitions. [2021-03-10 22:59:14,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:59:14,956 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:14,956 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:15,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-03-10 22:59:15,170 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:15,171 INFO L82 PathProgramCache]: Analyzing trace with hash 649114413, now seen corresponding path program 66 times [2021-03-10 22:59:15,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:15,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876993230] [2021-03-10 22:59:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:15,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876993230] [2021-03-10 22:59:15,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128791416] [2021-03-10 22:59:15,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:15,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:59:15,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:15,459 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:59:15,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:15,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:15,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-03-10 22:59:15,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218619257] [2021-03-10 22:59:15,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 22:59:15,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:15,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 22:59:15,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:59:15,840 INFO L87 Difference]: Start difference. First operand 457 states and 984 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-03-10 22:59:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:18,302 INFO L93 Difference]: Finished difference Result 633 states and 1292 transitions. [2021-03-10 22:59:18,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 22:59:18,302 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 29 [2021-03-10 22:59:18,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:18,303 INFO L225 Difference]: With dead ends: 633 [2021-03-10 22:59:18,303 INFO L226 Difference]: Without dead ends: 598 [2021-03-10 22:59:18,304 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 2096.3ms TimeCoverageRelationStatistics Valid=509, Invalid=4183, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 22:59:18,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-03-10 22:59:18,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 429. [2021-03-10 22:59:18,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.135514018691589) internal successors, (914), 428 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:18,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 914 transitions. [2021-03-10 22:59:18,308 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 914 transitions. Word has length 29 [2021-03-10 22:59:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:18,308 INFO L480 AbstractCegarLoop]: Abstraction has 429 states and 914 transitions. [2021-03-10 22:59:18,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-03-10 22:59:18,308 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 914 transitions. [2021-03-10 22:59:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:59:18,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:18,309 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:18,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-03-10 22:59:18,509 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:18,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1614463413, now seen corresponding path program 67 times [2021-03-10 22:59:18,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:18,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089709264] [2021-03-10 22:59:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:18,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089709264] [2021-03-10 22:59:18,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337367953] [2021-03-10 22:59:18,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:59:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:18,843 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:59:18,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:19,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:19,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-03-10 22:59:19,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418144252] [2021-03-10 22:59:19,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 22:59:19,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:19,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 22:59:19,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:59:19,301 INFO L87 Difference]: Start difference. First operand 429 states and 914 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2021-03-10 22:59:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:20,946 INFO L93 Difference]: Finished difference Result 592 states and 1203 transitions. [2021-03-10 22:59:20,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 22:59:20,946 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 29 [2021-03-10 22:59:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:20,947 INFO L225 Difference]: With dead ends: 592 [2021-03-10 22:59:20,947 INFO L226 Difference]: Without dead ends: 572 [2021-03-10 22:59:20,948 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1780.9ms TimeCoverageRelationStatistics Valid=478, Invalid=3304, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 22:59:20,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-03-10 22:59:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 360. [2021-03-10 22:59:20,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.1559888579387185) internal successors, (774), 359 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 774 transitions. [2021-03-10 22:59:20,952 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 774 transitions. Word has length 29 [2021-03-10 22:59:20,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:20,952 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 774 transitions. [2021-03-10 22:59:20,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2021-03-10 22:59:20,952 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 774 transitions. [2021-03-10 22:59:20,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:59:20,952 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:20,952 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:21,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:21,153 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:21,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:21,153 INFO L82 PathProgramCache]: Analyzing trace with hash -184540877, now seen corresponding path program 68 times [2021-03-10 22:59:21,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:21,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474709411] [2021-03-10 22:59:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:21,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474709411] [2021-03-10 22:59:21,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103637627] [2021-03-10 22:59:21,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:21,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:59:21,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:21,353 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:59:21,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:21,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:21,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-03-10 22:59:21,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703143125] [2021-03-10 22:59:21,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 22:59:21,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:21,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 22:59:21,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:59:21,740 INFO L87 Difference]: Start difference. First operand 360 states and 774 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-03-10 22:59:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:23,639 INFO L93 Difference]: Finished difference Result 586 states and 1199 transitions. [2021-03-10 22:59:23,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 22:59:23,639 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 29 [2021-03-10 22:59:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:23,640 INFO L225 Difference]: With dead ends: 586 [2021-03-10 22:59:23,640 INFO L226 Difference]: Without dead ends: 559 [2021-03-10 22:59:23,641 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 1808.1ms TimeCoverageRelationStatistics Valid=767, Invalid=4783, Unknown=0, NotChecked=0, Total=5550 [2021-03-10 22:59:23,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-03-10 22:59:23,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 240. [2021-03-10 22:59:23,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.062761506276151) internal successors, (493), 239 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:23,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 493 transitions. [2021-03-10 22:59:23,644 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 493 transitions. Word has length 29 [2021-03-10 22:59:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:23,644 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 493 transitions. [2021-03-10 22:59:23,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-03-10 22:59:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 493 transitions. [2021-03-10 22:59:23,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:59:23,645 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:23,645 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:23,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:23,845 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:23,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:23,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1808436383, now seen corresponding path program 69 times [2021-03-10 22:59:23,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:23,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276176496] [2021-03-10 22:59:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:24,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276176496] [2021-03-10 22:59:24,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375606098] [2021-03-10 22:59:24,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:24,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:59:24,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:24,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 22:59:24,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:24,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:24,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 22:59:24,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404474352] [2021-03-10 22:59:24,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 22:59:24,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:24,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 22:59:24,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:59:24,617 INFO L87 Difference]: Start difference. First operand 240 states and 493 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:26,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:26,690 INFO L93 Difference]: Finished difference Result 513 states and 999 transitions. [2021-03-10 22:59:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 22:59:26,692 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2021-03-10 22:59:26,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:26,692 INFO L225 Difference]: With dead ends: 513 [2021-03-10 22:59:26,692 INFO L226 Difference]: Without dead ends: 458 [2021-03-10 22:59:26,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 2116.6ms TimeCoverageRelationStatistics Valid=722, Invalid=4828, Unknown=0, NotChecked=0, Total=5550 [2021-03-10 22:59:26,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-03-10 22:59:26,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 297. [2021-03-10 22:59:26,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.125) internal successors, (629), 296 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 629 transitions. [2021-03-10 22:59:26,696 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 629 transitions. Word has length 31 [2021-03-10 22:59:26,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:26,696 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 629 transitions. [2021-03-10 22:59:26,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 629 transitions. [2021-03-10 22:59:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:59:26,697 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:26,697 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:26,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:26,897 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:26,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1037382439, now seen corresponding path program 70 times [2021-03-10 22:59:26,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:26,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897945166] [2021-03-10 22:59:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:27,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897945166] [2021-03-10 22:59:27,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376935753] [2021-03-10 22:59:27,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:27,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:59:27,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:27,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 22:59:27,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:27,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:27,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 22:59:27,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171611344] [2021-03-10 22:59:27,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 22:59:27,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:27,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 22:59:27,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:59:27,640 INFO L87 Difference]: Start difference. First operand 297 states and 629 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:30,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:30,070 INFO L93 Difference]: Finished difference Result 533 states and 1032 transitions. [2021-03-10 22:59:30,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 22:59:30,071 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2021-03-10 22:59:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:30,071 INFO L225 Difference]: With dead ends: 533 [2021-03-10 22:59:30,071 INFO L226 Difference]: Without dead ends: 489 [2021-03-10 22:59:30,072 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 2268.5ms TimeCoverageRelationStatistics Valid=806, Invalid=5514, Unknown=0, NotChecked=0, Total=6320 [2021-03-10 22:59:30,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-03-10 22:59:30,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 299. [2021-03-10 22:59:30,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.1241610738255035) internal successors, (633), 298 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:30,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 633 transitions. [2021-03-10 22:59:30,075 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 633 transitions. Word has length 31 [2021-03-10 22:59:30,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:30,075 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 633 transitions. [2021-03-10 22:59:30,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:30,076 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 633 transitions. [2021-03-10 22:59:30,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:59:30,076 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:30,076 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:30,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-03-10 22:59:30,277 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:30,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:30,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2133425259, now seen corresponding path program 71 times [2021-03-10 22:59:30,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:30,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522350367] [2021-03-10 22:59:30,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:30,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522350367] [2021-03-10 22:59:30,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684038113] [2021-03-10 22:59:30,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:30,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:59:30,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:30,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 22:59:30,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:31,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:31,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 22:59:31,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280482049] [2021-03-10 22:59:31,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 22:59:31,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:31,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 22:59:31,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:59:31,039 INFO L87 Difference]: Start difference. First operand 299 states and 633 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:33,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:33,645 INFO L93 Difference]: Finished difference Result 531 states and 1030 transitions. [2021-03-10 22:59:33,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-10 22:59:33,646 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2021-03-10 22:59:33,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:33,647 INFO L225 Difference]: With dead ends: 531 [2021-03-10 22:59:33,647 INFO L226 Difference]: Without dead ends: 493 [2021-03-10 22:59:33,648 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 2466.6ms TimeCoverageRelationStatistics Valid=903, Invalid=6237, Unknown=0, NotChecked=0, Total=7140 [2021-03-10 22:59:33,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-03-10 22:59:33,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 301. [2021-03-10 22:59:33,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.1233333333333335) internal successors, (637), 300 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:33,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 637 transitions. [2021-03-10 22:59:33,651 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 637 transitions. Word has length 31 [2021-03-10 22:59:33,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:33,651 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 637 transitions. [2021-03-10 22:59:33,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:33,652 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 637 transitions. [2021-03-10 22:59:33,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:59:33,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:33,652 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:33,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:33,868 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:33,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:33,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1329117521, now seen corresponding path program 72 times [2021-03-10 22:59:33,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:33,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681893859] [2021-03-10 22:59:33,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:34,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681893859] [2021-03-10 22:59:34,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047380775] [2021-03-10 22:59:34,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:59:34,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:59:34,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:34,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 22:59:34,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:34,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:34,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 22:59:34,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089108123] [2021-03-10 22:59:34,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 22:59:34,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:34,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 22:59:34,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:59:34,797 INFO L87 Difference]: Start difference. First operand 301 states and 637 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:37,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:37,842 INFO L93 Difference]: Finished difference Result 576 states and 1113 transitions. [2021-03-10 22:59:37,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-03-10 22:59:37,843 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2021-03-10 22:59:37,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:37,844 INFO L225 Difference]: With dead ends: 576 [2021-03-10 22:59:37,844 INFO L226 Difference]: Without dead ends: 531 [2021-03-10 22:59:37,844 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 3012.5ms TimeCoverageRelationStatistics Valid=1015, Invalid=6817, Unknown=0, NotChecked=0, Total=7832 [2021-03-10 22:59:37,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-03-10 22:59:37,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 304. [2021-03-10 22:59:37,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.128712871287129) internal successors, (645), 303 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 645 transitions. [2021-03-10 22:59:37,848 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 645 transitions. Word has length 31 [2021-03-10 22:59:37,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:37,848 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 645 transitions. [2021-03-10 22:59:37,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:37,848 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 645 transitions. [2021-03-10 22:59:37,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:59:37,849 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:37,849 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:38,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:38,071 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:38,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:38,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1700921915, now seen corresponding path program 73 times [2021-03-10 22:59:38,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:38,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586471878] [2021-03-10 22:59:38,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:38,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586471878] [2021-03-10 22:59:38,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942123707] [2021-03-10 22:59:38,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:38,467 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 22:59:38,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:38,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:38,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 22:59:38,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042483988] [2021-03-10 22:59:38,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 22:59:38,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:38,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 22:59:38,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:59:38,940 INFO L87 Difference]: Start difference. First operand 304 states and 645 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:41,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:41,727 INFO L93 Difference]: Finished difference Result 506 states and 985 transitions. [2021-03-10 22:59:41,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-10 22:59:41,728 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2021-03-10 22:59:41,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:41,728 INFO L225 Difference]: With dead ends: 506 [2021-03-10 22:59:41,728 INFO L226 Difference]: Without dead ends: 479 [2021-03-10 22:59:41,729 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 2689.1ms TimeCoverageRelationStatistics Valid=936, Invalid=5706, Unknown=0, NotChecked=0, Total=6642 [2021-03-10 22:59:41,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-03-10 22:59:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 304. [2021-03-10 22:59:41,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.128712871287129) internal successors, (645), 303 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:41,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 645 transitions. [2021-03-10 22:59:41,732 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 645 transitions. Word has length 31 [2021-03-10 22:59:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:41,732 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 645 transitions. [2021-03-10 22:59:41,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 645 transitions. [2021-03-10 22:59:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:59:41,733 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:41,733 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:41,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:41,933 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:41,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1287765489, now seen corresponding path program 74 times [2021-03-10 22:59:41,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:41,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841500064] [2021-03-10 22:59:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:42,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841500064] [2021-03-10 22:59:42,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290349078] [2021-03-10 22:59:42,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:42,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:59:42,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:42,281 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 22:59:42,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:42,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:42,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 22:59:42,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583533122] [2021-03-10 22:59:42,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 22:59:42,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:42,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 22:59:42,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:59:42,760 INFO L87 Difference]: Start difference. First operand 304 states and 645 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:45,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:45,268 INFO L93 Difference]: Finished difference Result 503 states and 981 transitions. [2021-03-10 22:59:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-10 22:59:45,269 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2021-03-10 22:59:45,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:45,270 INFO L225 Difference]: With dead ends: 503 [2021-03-10 22:59:45,270 INFO L226 Difference]: Without dead ends: 465 [2021-03-10 22:59:45,270 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 2491.7ms TimeCoverageRelationStatistics Valid=752, Invalid=5568, Unknown=0, NotChecked=0, Total=6320 [2021-03-10 22:59:45,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-03-10 22:59:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 314. [2021-03-10 22:59:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.1246006389776357) internal successors, (665), 313 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:45,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 665 transitions. [2021-03-10 22:59:45,273 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 665 transitions. Word has length 31 [2021-03-10 22:59:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:45,273 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 665 transitions. [2021-03-10 22:59:45,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 665 transitions. [2021-03-10 22:59:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:59:45,274 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:45,274 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:45,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-03-10 22:59:45,474 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:45,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2120190005, now seen corresponding path program 75 times [2021-03-10 22:59:45,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:45,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673064015] [2021-03-10 22:59:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:45,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673064015] [2021-03-10 22:59:45,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890828271] [2021-03-10 22:59:45,863 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 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 [2021-03-10 22:59:45,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:59:45,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:45,882 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 22:59:45,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:46,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:46,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 22:59:46,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39739437] [2021-03-10 22:59:46,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 22:59:46,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:46,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 22:59:46,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:59:46,395 INFO L87 Difference]: Start difference. First operand 314 states and 665 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:49,380 INFO L93 Difference]: Finished difference Result 558 states and 1083 transitions. [2021-03-10 22:59:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-10 22:59:49,381 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2021-03-10 22:59:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:49,382 INFO L225 Difference]: With dead ends: 558 [2021-03-10 22:59:49,382 INFO L226 Difference]: Without dead ends: 513 [2021-03-10 22:59:49,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2091 ImplicationChecksByTransitivity, 2909.9ms TimeCoverageRelationStatistics Valid=876, Invalid=6096, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 22:59:49,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-03-10 22:59:49,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 316. [2021-03-10 22:59:49,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.126984126984127) internal successors, (670), 315 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:49,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 670 transitions. [2021-03-10 22:59:49,386 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 670 transitions. Word has length 31 [2021-03-10 22:59:49,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:49,386 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 670 transitions. [2021-03-10 22:59:49,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 670 transitions. [2021-03-10 22:59:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:59:49,387 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:49,387 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:49,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:49,587 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:49,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:49,587 INFO L82 PathProgramCache]: Analyzing trace with hash 855262145, now seen corresponding path program 76 times [2021-03-10 22:59:49,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:49,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142843490] [2021-03-10 22:59:49,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:49,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142843490] [2021-03-10 22:59:49,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482573428] [2021-03-10 22:59:49,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:59:50,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:59:50,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:50,016 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 22:59:50,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:50,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:50,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 22:59:50,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492128164] [2021-03-10 22:59:50,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 22:59:50,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:50,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 22:59:50,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:59:50,549 INFO L87 Difference]: Start difference. First operand 316 states and 670 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:53,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:53,266 INFO L93 Difference]: Finished difference Result 488 states and 962 transitions. [2021-03-10 22:59:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 22:59:53,267 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2021-03-10 22:59:53,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:53,267 INFO L225 Difference]: With dead ends: 488 [2021-03-10 22:59:53,267 INFO L226 Difference]: Without dead ends: 468 [2021-03-10 22:59:53,268 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 2721.5ms TimeCoverageRelationStatistics Valid=808, Invalid=5044, Unknown=0, NotChecked=0, Total=5852 [2021-03-10 22:59:53,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-03-10 22:59:53,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 312. [2021-03-10 22:59:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.112540192926045) internal successors, (657), 311 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 657 transitions. [2021-03-10 22:59:53,271 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 657 transitions. Word has length 31 [2021-03-10 22:59:53,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:53,271 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 657 transitions. [2021-03-10 22:59:53,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:53,271 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 657 transitions. [2021-03-10 22:59:53,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:59:53,272 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:53,272 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:53,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:53,472 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:53,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:53,473 INFO L82 PathProgramCache]: Analyzing trace with hash 389420273, now seen corresponding path program 77 times [2021-03-10 22:59:53,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:53,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687094444] [2021-03-10 22:59:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:53,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687094444] [2021-03-10 22:59:53,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583379033] [2021-03-10 22:59:53,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:59:53,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:59:53,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:53,854 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 22:59:53,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:54,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:54,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 22:59:54,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113896886] [2021-03-10 22:59:54,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 22:59:54,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:54,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 22:59:54,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:59:54,381 INFO L87 Difference]: Start difference. First operand 312 states and 657 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:58,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:59:58,034 INFO L93 Difference]: Finished difference Result 577 states and 1140 transitions. [2021-03-10 22:59:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-03-10 22:59:58,035 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2021-03-10 22:59:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:59:58,036 INFO L225 Difference]: With dead ends: 577 [2021-03-10 22:59:58,036 INFO L226 Difference]: Without dead ends: 529 [2021-03-10 22:59:58,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 3515.3ms TimeCoverageRelationStatistics Valid=963, Invalid=7047, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 22:59:58,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-03-10 22:59:58,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 325. [2021-03-10 22:59:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.1203703703703702) internal successors, (687), 324 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 687 transitions. [2021-03-10 22:59:58,040 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 687 transitions. Word has length 31 [2021-03-10 22:59:58,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:59:58,040 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 687 transitions. [2021-03-10 22:59:58,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:59:58,040 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 687 transitions. [2021-03-10 22:59:58,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:59:58,041 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:59:58,041 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:59:58,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:59:58,256 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:59:58,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:59:58,256 INFO L82 PathProgramCache]: Analyzing trace with hash -875507587, now seen corresponding path program 78 times [2021-03-10 22:59:58,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:59:58,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687911099] [2021-03-10 22:59:58,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:59:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:59:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:58,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687911099] [2021-03-10 22:59:58,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918509659] [2021-03-10 22:59:58,502 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 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 [2021-03-10 22:59:58,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:59:58,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:59:58,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:59:58,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:59:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:59:59,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:59:59,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 22:59:59,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386681430] [2021-03-10 22:59:59,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 22:59:59,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:59:59,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 22:59:59,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:59:59,069 INFO L87 Difference]: Start difference. First operand 325 states and 687 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:02,840 INFO L93 Difference]: Finished difference Result 560 states and 1106 transitions. [2021-03-10 23:00:02,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-10 23:00:02,841 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:00:02,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:02,842 INFO L225 Difference]: With dead ends: 560 [2021-03-10 23:00:02,842 INFO L226 Difference]: Without dead ends: 526 [2021-03-10 23:00:02,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 3411.6ms TimeCoverageRelationStatistics Valid=909, Invalid=6063, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 23:00:02,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-03-10 23:00:02,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 296. [2021-03-10 23:00:02,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.08135593220339) internal successors, (614), 295 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 614 transitions. [2021-03-10 23:00:02,846 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 614 transitions. Word has length 31 [2021-03-10 23:00:02,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:02,846 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 614 transitions. [2021-03-10 23:00:02,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:02,846 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 614 transitions. [2021-03-10 23:00:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:00:02,847 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:02,847 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:03,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:03,059 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:03,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:03,059 INFO L82 PathProgramCache]: Analyzing trace with hash 232357381, now seen corresponding path program 79 times [2021-03-10 23:00:03,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:03,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593855848] [2021-03-10 23:00:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:03,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593855848] [2021-03-10 23:00:03,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993665444] [2021-03-10 23:00:03,605 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 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 [2021-03-10 23:00:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:03,622 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:00:03,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:04,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:04,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-03-10 23:00:04,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947985159] [2021-03-10 23:00:04,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:00:04,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:04,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:00:04,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:00:04,424 INFO L87 Difference]: Start difference. First operand 296 states and 614 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:05,157 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-10 23:00:05,819 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-03-10 23:00:09,136 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-03-10 23:00:09,475 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-03-10 23:00:10,238 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2021-03-10 23:00:10,416 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-03-10 23:00:11,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:11,962 INFO L93 Difference]: Finished difference Result 797 states and 1604 transitions. [2021-03-10 23:00:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-03-10 23:00:11,962 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 23:00:11,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:11,963 INFO L225 Difference]: With dead ends: 797 [2021-03-10 23:00:11,963 INFO L226 Difference]: Without dead ends: 783 [2021-03-10 23:00:11,964 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3033 ImplicationChecksByTransitivity, 6622.9ms TimeCoverageRelationStatistics Valid=1062, Invalid=8058, Unknown=0, NotChecked=0, Total=9120 [2021-03-10 23:00:11,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-03-10 23:00:11,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 340. [2021-03-10 23:00:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.0855457227138645) internal successors, (707), 339 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 707 transitions. [2021-03-10 23:00:11,968 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 707 transitions. Word has length 31 [2021-03-10 23:00:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:11,968 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 707 transitions. [2021-03-10 23:00:11,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 707 transitions. [2021-03-10 23:00:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:00:11,969 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:11,969 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:12,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:12,183 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:12,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:12,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1331478149, now seen corresponding path program 80 times [2021-03-10 23:00:12,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:12,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308257188] [2021-03-10 23:00:12,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:12,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308257188] [2021-03-10 23:00:12,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024807873] [2021-03-10 23:00:12,641 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 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 [2021-03-10 23:00:12,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:00:12,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:00:12,664 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:00:12,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:13,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:13,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 27 [2021-03-10 23:00:13,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120047791] [2021-03-10 23:00:13,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:00:13,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:13,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:00:13,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:00:13,464 INFO L87 Difference]: Start difference. First operand 340 states and 707 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 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) [2021-03-10 23:00:17,292 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-03-10 23:00:18,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:18,616 INFO L93 Difference]: Finished difference Result 552 states and 1113 transitions. [2021-03-10 23:00:18,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-10 23:00:18,617 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 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 31 [2021-03-10 23:00:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:18,618 INFO L225 Difference]: With dead ends: 552 [2021-03-10 23:00:18,618 INFO L226 Difference]: Without dead ends: 526 [2021-03-10 23:00:18,619 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 4648.9ms TimeCoverageRelationStatistics Valid=629, Invalid=4627, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:00:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-03-10 23:00:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 354. [2021-03-10 23:00:18,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.0793201133144477) internal successors, (734), 353 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 734 transitions. [2021-03-10 23:00:18,622 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 734 transitions. Word has length 31 [2021-03-10 23:00:18,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:18,622 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 734 transitions. [2021-03-10 23:00:18,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 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) [2021-03-10 23:00:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 734 transitions. [2021-03-10 23:00:18,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:00:18,623 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:18,623 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:18,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:18,823 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:18,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:18,824 INFO L82 PathProgramCache]: Analyzing trace with hash 802540923, now seen corresponding path program 81 times [2021-03-10 23:00:18,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:18,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186437367] [2021-03-10 23:00:18,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:00:19,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186437367] [2021-03-10 23:00:19,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786857144] [2021-03-10 23:00:19,248 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 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 [2021-03-10 23:00:19,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:00:19,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:00:19,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:00:19,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:19,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:19,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-03-10 23:00:19,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554213887] [2021-03-10 23:00:19,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:00:19,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:19,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:00:19,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:00:19,931 INFO L87 Difference]: Start difference. First operand 354 states and 734 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:21,904 INFO L93 Difference]: Finished difference Result 580 states and 1168 transitions. [2021-03-10 23:00:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:00:21,906 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 23:00:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:21,907 INFO L225 Difference]: With dead ends: 580 [2021-03-10 23:00:21,907 INFO L226 Difference]: Without dead ends: 566 [2021-03-10 23:00:21,907 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1850.7ms TimeCoverageRelationStatistics Valid=438, Invalid=2112, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:00:21,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-03-10 23:00:21,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 321. [2021-03-10 23:00:21,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.065625) internal successors, (661), 320 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:21,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 661 transitions. [2021-03-10 23:00:21,910 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 661 transitions. Word has length 31 [2021-03-10 23:00:21,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:21,911 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 661 transitions. [2021-03-10 23:00:21,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:21,911 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 661 transitions. [2021-03-10 23:00:21,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:00:21,911 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:21,911 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:22,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:22,127 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:22,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:22,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1311105745, now seen corresponding path program 82 times [2021-03-10 23:00:22,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:22,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069832693] [2021-03-10 23:00:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:00:22,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069832693] [2021-03-10 23:00:22,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999547627] [2021-03-10 23:00:22,216 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 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 [2021-03-10 23:00:22,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:00:22,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:00:22,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:00:22,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:00:22,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:22,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 23:00:22,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186301627] [2021-03-10 23:00:22,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:00:22,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:22,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:00:22,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:00:22,366 INFO L87 Difference]: Start difference. First operand 321 states and 661 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:22,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:22,493 INFO L93 Difference]: Finished difference Result 494 states and 989 transitions. [2021-03-10 23:00:22,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:00:22,494 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-03-10 23:00:22,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:22,494 INFO L225 Difference]: With dead ends: 494 [2021-03-10 23:00:22,494 INFO L226 Difference]: Without dead ends: 455 [2021-03-10 23:00:22,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:00:22,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-03-10 23:00:22,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 320. [2021-03-10 23:00:22,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.0658307210031346) internal successors, (659), 319 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:22,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 659 transitions. [2021-03-10 23:00:22,497 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 659 transitions. Word has length 33 [2021-03-10 23:00:22,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:22,497 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 659 transitions. [2021-03-10 23:00:22,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:22,497 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 659 transitions. [2021-03-10 23:00:22,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:00:22,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:22,498 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:22,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-03-10 23:00:22,698 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:22,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:22,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1845552953, now seen corresponding path program 83 times [2021-03-10 23:00:22,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:22,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32982055] [2021-03-10 23:00:22,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:23,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32982055] [2021-03-10 23:00:23,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243407617] [2021-03-10 23:00:23,247 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 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 [2021-03-10 23:00:23,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 23:00:23,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:00:23,266 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 23:00:23,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:24,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:24,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-03-10 23:00:24,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477875696] [2021-03-10 23:00:24,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:00:24,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:24,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:00:24,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:00:24,094 INFO L87 Difference]: Start difference. First operand 320 states and 659 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:26,588 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-10 23:00:27,363 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 23:00:27,618 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-10 23:00:28,595 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-10 23:00:29,328 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-03-10 23:00:29,756 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 23:00:30,032 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-10 23:00:30,981 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:00:31,136 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:00:31,322 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 23:00:31,590 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-10 23:00:31,776 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-03-10 23:00:31,953 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-10 23:00:32,132 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-03-10 23:00:32,419 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-03-10 23:00:33,289 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-03-10 23:00:33,561 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-03-10 23:00:33,884 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-03-10 23:00:34,143 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-03-10 23:00:35,460 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-03-10 23:00:35,865 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-03-10 23:00:36,122 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-03-10 23:00:36,467 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-03-10 23:00:36,875 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2021-03-10 23:00:37,381 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-03-10 23:00:39,068 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-03-10 23:00:39,870 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 23:00:40,119 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-10 23:00:40,494 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 23:00:40,847 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-10 23:00:41,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:41,631 INFO L93 Difference]: Finished difference Result 1017 states and 2007 transitions. [2021-03-10 23:00:41,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-03-10 23:00:41,633 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-03-10 23:00:41,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:41,634 INFO L225 Difference]: With dead ends: 1017 [2021-03-10 23:00:41,634 INFO L226 Difference]: Without dead ends: 955 [2021-03-10 23:00:41,635 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7650 ImplicationChecksByTransitivity, 14525.4ms TimeCoverageRelationStatistics Valid=2584, Invalid=18008, Unknown=0, NotChecked=0, Total=20592 [2021-03-10 23:00:41,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-03-10 23:00:41,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 421. [2021-03-10 23:00:41,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.1023809523809525) internal successors, (883), 420 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:41,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 883 transitions. [2021-03-10 23:00:41,640 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 883 transitions. Word has length 33 [2021-03-10 23:00:41,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:41,640 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 883 transitions. [2021-03-10 23:00:41,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:41,641 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 883 transitions. [2021-03-10 23:00:41,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:00:41,642 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:41,642 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:41,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:00:41,842 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:41,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:41,842 INFO L82 PathProgramCache]: Analyzing trace with hash -360118039, now seen corresponding path program 84 times [2021-03-10 23:00:41,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:41,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455086714] [2021-03-10 23:00:41,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:00:42,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455086714] [2021-03-10 23:00:42,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728017918] [2021-03-10 23:00:42,426 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 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 [2021-03-10 23:00:42,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:00:42,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:00:42,445 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 42 conjunts are in the unsatisfiable core [2021-03-10 23:00:42,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:43,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:43,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-03-10 23:00:43,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913642148] [2021-03-10 23:00:43,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:00:43,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:43,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:00:43,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:00:43,258 INFO L87 Difference]: Start difference. First operand 421 states and 883 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 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) [2021-03-10 23:00:47,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:00:47,051 INFO L93 Difference]: Finished difference Result 637 states and 1280 transitions. [2021-03-10 23:00:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 23:00:47,052 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 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 33 [2021-03-10 23:00:47,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:00:47,053 INFO L225 Difference]: With dead ends: 637 [2021-03-10 23:00:47,053 INFO L226 Difference]: Without dead ends: 592 [2021-03-10 23:00:47,054 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 3597.7ms TimeCoverageRelationStatistics Valid=500, Invalid=4470, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 23:00:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-03-10 23:00:47,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 327. [2021-03-10 23:00:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.107361963190184) internal successors, (687), 326 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 687 transitions. [2021-03-10 23:00:47,057 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 687 transitions. Word has length 33 [2021-03-10 23:00:47,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:00:47,057 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 687 transitions. [2021-03-10 23:00:47,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 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) [2021-03-10 23:00:47,057 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 687 transitions. [2021-03-10 23:00:47,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:00:47,058 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:00:47,058 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:00:47,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-10 23:00:47,258 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:00:47,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:00:47,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1180351111, now seen corresponding path program 85 times [2021-03-10 23:00:47,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:00:47,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457861042] [2021-03-10 23:00:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:00:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:47,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457861042] [2021-03-10 23:00:47,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896223067] [2021-03-10 23:00:47,825 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 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 [2021-03-10 23:00:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:00:47,843 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 23:00:47,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:00:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:00:48,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:00:48,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-03-10 23:00:48,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052367977] [2021-03-10 23:00:48,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:00:48,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:00:48,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:00:48,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:00:48,782 INFO L87 Difference]: Start difference. First operand 327 states and 687 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:00:49,231 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 23:00:49,402 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-03-10 23:00:49,654 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 23:00:49,971 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 23:00:50,524 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-03-10 23:00:51,001 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-03-10 23:00:51,530 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:00:51,712 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 23:00:52,026 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-10 23:00:52,521 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 23:00:52,788 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:00:52,929 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 23:00:53,191 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-10 23:00:53,367 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-10 23:00:55,127 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 23:00:56,107 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 23:00:56,280 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-10 23:00:57,082 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 23:00:58,009 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-03-10 23:00:58,241 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 24 [2021-03-10 23:00:58,752 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-10 23:00:58,951 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 23:00:59,337 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2021-03-10 23:00:59,903 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-10 23:01:00,166 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-03-10 23:01:00,532 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-03-10 23:01:00,823 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-03-10 23:01:01,434 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-03-10 23:01:01,705 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-03-10 23:01:02,089 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-03-10 23:01:02,540 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 23:01:02,739 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-10 23:01:03,583 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-10 23:01:03,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:01:03,621 INFO L93 Difference]: Finished difference Result 914 states and 1871 transitions. [2021-03-10 23:01:03,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-03-10 23:01:03,623 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-03-10 23:01:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:01:03,624 INFO L225 Difference]: With dead ends: 914 [2021-03-10 23:01:03,624 INFO L226 Difference]: Without dead ends: 888 [2021-03-10 23:01:03,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5056 ImplicationChecksByTransitivity, 12482.0ms TimeCoverageRelationStatistics Valid=1875, Invalid=12167, Unknown=0, NotChecked=0, Total=14042 [2021-03-10 23:01:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-03-10 23:01:03,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 371. [2021-03-10 23:01:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.0945945945945947) internal successors, (775), 370 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:03,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 775 transitions. [2021-03-10 23:01:03,629 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 775 transitions. Word has length 33 [2021-03-10 23:01:03,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:01:03,630 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 775 transitions. [2021-03-10 23:01:03,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:03,630 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 775 transitions. [2021-03-10 23:01:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:01:03,634 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:01:03,634 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:01:03,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-10 23:01:03,835 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:01:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:01:03,835 INFO L82 PathProgramCache]: Analyzing trace with hash 569511771, now seen corresponding path program 86 times [2021-03-10 23:01:03,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:01:03,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553673396] [2021-03-10 23:01:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:01:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:04,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553673396] [2021-03-10 23:01:04,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097477686] [2021-03-10 23:01:04,489 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 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 [2021-03-10 23:01:04,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:01:04,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:01:04,508 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:01:04,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:01:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:05,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:01:05,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:01:05,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853270801] [2021-03-10 23:01:05,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:01:05,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:01:05,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:01:05,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:01:05,469 INFO L87 Difference]: Start difference. First operand 371 states and 775 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:10,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:01:10,104 INFO L93 Difference]: Finished difference Result 795 states and 1605 transitions. [2021-03-10 23:01:10,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-10 23:01:10,105 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:01:10,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:01:10,106 INFO L225 Difference]: With dead ends: 795 [2021-03-10 23:01:10,106 INFO L226 Difference]: Without dead ends: 734 [2021-03-10 23:01:10,107 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 4594.9ms TimeCoverageRelationStatistics Valid=913, Invalid=6227, Unknown=0, NotChecked=0, Total=7140 [2021-03-10 23:01:10,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-03-10 23:01:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 476. [2021-03-10 23:01:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.1789473684210527) internal successors, (1035), 475 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1035 transitions. [2021-03-10 23:01:10,112 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1035 transitions. Word has length 35 [2021-03-10 23:01:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:01:10,112 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1035 transitions. [2021-03-10 23:01:10,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1035 transitions. [2021-03-10 23:01:10,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:01:10,113 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:01:10,113 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:01:10,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-03-10 23:01:10,319 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:01:10,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:01:10,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1678953501, now seen corresponding path program 87 times [2021-03-10 23:01:10,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:01:10,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139610695] [2021-03-10 23:01:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:01:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:11,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139610695] [2021-03-10 23:01:11,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37088701] [2021-03-10 23:01:11,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:01:11,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:01:11,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:01:11,037 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:01:11,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:01:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:12,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:01:12,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:01:12,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684386375] [2021-03-10 23:01:12,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:01:12,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:01:12,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:01:12,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:01:12,062 INFO L87 Difference]: Start difference. First operand 476 states and 1035 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:01:17,462 INFO L93 Difference]: Finished difference Result 821 states and 1648 transitions. [2021-03-10 23:01:17,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-03-10 23:01:17,464 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:01:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:01:17,465 INFO L225 Difference]: With dead ends: 821 [2021-03-10 23:01:17,465 INFO L226 Difference]: Without dead ends: 771 [2021-03-10 23:01:17,466 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 5063.6ms TimeCoverageRelationStatistics Valid=997, Invalid=7013, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 23:01:17,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-03-10 23:01:17,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 478. [2021-03-10 23:01:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.1781970649895177) internal successors, (1039), 477 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:17,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1039 transitions. [2021-03-10 23:01:17,471 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1039 transitions. Word has length 35 [2021-03-10 23:01:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:01:17,471 INFO L480 AbstractCegarLoop]: Abstraction has 478 states and 1039 transitions. [2021-03-10 23:01:17,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1039 transitions. [2021-03-10 23:01:17,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:01:17,472 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:01:17,472 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:01:17,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-03-10 23:01:17,676 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:01:17,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:01:17,676 INFO L82 PathProgramCache]: Analyzing trace with hash -648791001, now seen corresponding path program 88 times [2021-03-10 23:01:17,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:01:17,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504053774] [2021-03-10 23:01:17,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:01:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:18,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504053774] [2021-03-10 23:01:18,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640079591] [2021-03-10 23:01:18,369 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 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 [2021-03-10 23:01:18,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:01:18,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:01:18,396 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:01:18,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:01:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:19,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:01:19,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:01:19,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112398125] [2021-03-10 23:01:19,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:01:19,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:01:19,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:01:19,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:01:19,433 INFO L87 Difference]: Start difference. First operand 478 states and 1039 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:25,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:01:25,430 INFO L93 Difference]: Finished difference Result 819 states and 1646 transitions. [2021-03-10 23:01:25,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-03-10 23:01:25,432 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:01:25,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:01:25,433 INFO L225 Difference]: With dead ends: 819 [2021-03-10 23:01:25,433 INFO L226 Difference]: Without dead ends: 775 [2021-03-10 23:01:25,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 5431.5ms TimeCoverageRelationStatistics Valid=1094, Invalid=7836, Unknown=0, NotChecked=0, Total=8930 [2021-03-10 23:01:25,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-03-10 23:01:25,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 480. [2021-03-10 23:01:25,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.1774530271398747) internal successors, (1043), 479 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:25,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1043 transitions. [2021-03-10 23:01:25,439 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1043 transitions. Word has length 35 [2021-03-10 23:01:25,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:01:25,439 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 1043 transitions. [2021-03-10 23:01:25,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1043 transitions. [2021-03-10 23:01:25,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:01:25,440 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:01:25,440 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:01:25,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:01:25,641 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:01:25,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:01:25,641 INFO L82 PathProgramCache]: Analyzing trace with hash 447251819, now seen corresponding path program 89 times [2021-03-10 23:01:25,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:01:25,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425669838] [2021-03-10 23:01:25,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:01:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:26,130 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:01:26,270 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:01:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:26,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425669838] [2021-03-10 23:01:26,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37333585] [2021-03-10 23:01:26,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:01:26,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:01:26,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:01:26,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:01:26,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:01:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:27,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:01:27,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:01:27,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888982157] [2021-03-10 23:01:27,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:01:27,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:01:27,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:01:27,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:01:27,439 INFO L87 Difference]: Start difference. First operand 480 states and 1043 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:34,122 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:01:34,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:01:34,812 INFO L93 Difference]: Finished difference Result 817 states and 1644 transitions. [2021-03-10 23:01:34,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-03-10 23:01:34,815 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:01:34,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:01:34,816 INFO L225 Difference]: With dead ends: 817 [2021-03-10 23:01:34,816 INFO L226 Difference]: Without dead ends: 779 [2021-03-10 23:01:34,817 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3034 ImplicationChecksByTransitivity, 6187.1ms TimeCoverageRelationStatistics Valid=1216, Invalid=8684, Unknown=0, NotChecked=0, Total=9900 [2021-03-10 23:01:34,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-03-10 23:01:34,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 482. [2021-03-10 23:01:34,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.176715176715177) internal successors, (1047), 481 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:34,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1047 transitions. [2021-03-10 23:01:34,822 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1047 transitions. Word has length 35 [2021-03-10 23:01:34,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:01:34,822 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 1047 transitions. [2021-03-10 23:01:34,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1047 transitions. [2021-03-10 23:01:34,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:01:34,823 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:01:34,823 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:01:35,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:01:35,024 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:01:35,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:01:35,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1279676335, now seen corresponding path program 90 times [2021-03-10 23:01:35,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:01:35,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202821186] [2021-03-10 23:01:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:01:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:35,514 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:01:35,666 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:01:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:35,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202821186] [2021-03-10 23:01:35,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870031922] [2021-03-10 23:01:35,890 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 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 [2021-03-10 23:01:35,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 23:01:35,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:01:35,911 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 23:01:35,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:01:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:37,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:01:37,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:01:37,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022847022] [2021-03-10 23:01:37,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:01:37,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:01:37,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:01:37,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:01:37,487 INFO L87 Difference]: Start difference. First operand 482 states and 1047 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:44,131 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-03-10 23:01:44,552 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 22 [2021-03-10 23:01:45,169 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 23:01:45,971 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-10 23:01:46,326 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 17 [2021-03-10 23:01:46,517 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 21 [2021-03-10 23:01:47,341 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 23 [2021-03-10 23:01:47,547 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-10 23:01:47,824 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 23:01:48,184 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-10 23:01:48,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:01:48,949 INFO L93 Difference]: Finished difference Result 876 states and 1753 transitions. [2021-03-10 23:01:48,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-03-10 23:01:48,952 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:01:48,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:01:48,953 INFO L225 Difference]: With dead ends: 876 [2021-03-10 23:01:48,953 INFO L226 Difference]: Without dead ends: 831 [2021-03-10 23:01:48,954 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 9782.4ms TimeCoverageRelationStatistics Valid=1448, Invalid=10984, Unknown=0, NotChecked=0, Total=12432 [2021-03-10 23:01:48,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-03-10 23:01:48,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 485. [2021-03-10 23:01:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.1797520661157024) internal successors, (1055), 484 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1055 transitions. [2021-03-10 23:01:48,959 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1055 transitions. Word has length 35 [2021-03-10 23:01:48,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:01:48,959 INFO L480 AbstractCegarLoop]: Abstraction has 485 states and 1055 transitions. [2021-03-10 23:01:48,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:48,959 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1055 transitions. [2021-03-10 23:01:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:01:48,960 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:01:48,960 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:01:49,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:01:49,160 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:01:49,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:01:49,161 INFO L82 PathProgramCache]: Analyzing trace with hash 14748475, now seen corresponding path program 91 times [2021-03-10 23:01:49,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:01:49,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238295447] [2021-03-10 23:01:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:01:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:49,683 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:01:49,848 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-10 23:01:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:50,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238295447] [2021-03-10 23:01:50,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208213260] [2021-03-10 23:01:50,087 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 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 [2021-03-10 23:01:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:50,106 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:01:50,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:01:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:51,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:01:51,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:01:51,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205644670] [2021-03-10 23:01:51,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:01:51,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:01:51,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:01:51,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:01:51,119 INFO L87 Difference]: Start difference. First operand 485 states and 1055 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:52,791 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 14 [2021-03-10 23:01:57,378 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 23:01:58,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:01:58,005 INFO L93 Difference]: Finished difference Result 740 states and 1493 transitions. [2021-03-10 23:01:58,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-03-10 23:01:58,006 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:01:58,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:01:58,006 INFO L225 Difference]: With dead ends: 740 [2021-03-10 23:01:58,006 INFO L226 Difference]: Without dead ends: 713 [2021-03-10 23:01:58,007 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 6691.7ms TimeCoverageRelationStatistics Valid=1253, Invalid=7867, Unknown=0, NotChecked=0, Total=9120 [2021-03-10 23:01:58,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-03-10 23:01:58,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 478. [2021-03-10 23:01:58,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.1781970649895177) internal successors, (1039), 477 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:58,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1039 transitions. [2021-03-10 23:01:58,012 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1039 transitions. Word has length 35 [2021-03-10 23:01:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:01:58,012 INFO L480 AbstractCegarLoop]: Abstraction has 478 states and 1039 transitions. [2021-03-10 23:01:58,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:01:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1039 transitions. [2021-03-10 23:01:58,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:01:58,013 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:01:58,013 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:01:58,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-03-10 23:01:58,213 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:01:58,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:01:58,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1579011027, now seen corresponding path program 92 times [2021-03-10 23:01:58,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:01:58,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530267652] [2021-03-10 23:01:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:01:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:01:58,815 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:01:58,959 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:01:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:01:59,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530267652] [2021-03-10 23:01:59,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537984287] [2021-03-10 23:01:59,059 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 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 [2021-03-10 23:01:59,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:01:59,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:01:59,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:01:59,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:02:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:00,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:02:00,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:02:00,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890211559] [2021-03-10 23:02:00,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:02:00,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:02:00,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:02:00,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:02:00,403 INFO L87 Difference]: Start difference. First operand 478 states and 1039 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:06,922 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:02:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:02:07,941 INFO L93 Difference]: Finished difference Result 782 states and 1573 transitions. [2021-03-10 23:02:07,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-10 23:02:07,944 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:02:07,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:02:07,945 INFO L225 Difference]: With dead ends: 782 [2021-03-10 23:02:07,945 INFO L226 Difference]: Without dead ends: 738 [2021-03-10 23:02:07,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 6602.4ms TimeCoverageRelationStatistics Valid=930, Invalid=7080, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 23:02:07,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-03-10 23:02:07,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 484. [2021-03-10 23:02:07,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.175983436853002) internal successors, (1051), 483 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:07,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1051 transitions. [2021-03-10 23:02:07,950 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1051 transitions. Word has length 35 [2021-03-10 23:02:07,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:02:07,950 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 1051 transitions. [2021-03-10 23:02:07,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:07,950 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1051 transitions. [2021-03-10 23:02:07,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:02:07,951 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:02:07,951 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:02:08,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:02:08,151 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:02:08,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:02:08,152 INFO L82 PathProgramCache]: Analyzing trace with hash -482968207, now seen corresponding path program 93 times [2021-03-10 23:02:08,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:02:08,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266712593] [2021-03-10 23:02:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:02:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:02:08,750 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:02:08,905 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:02:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:09,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266712593] [2021-03-10 23:02:09,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465855190] [2021-03-10 23:02:09,009 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 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 [2021-03-10 23:02:09,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:02:09,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:02:09,030 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 23:02:09,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:02:10,098 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 23:02:10,937 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:02:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:11,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:02:11,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:02:11,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143788178] [2021-03-10 23:02:11,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:02:11,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:02:11,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:02:11,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:02:11,101 INFO L87 Difference]: Start difference. First operand 484 states and 1051 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:18,619 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-03-10 23:02:19,370 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-03-10 23:02:20,033 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 21 [2021-03-10 23:02:20,291 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2021-03-10 23:02:20,554 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:02:20,713 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 23:02:21,055 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 23 [2021-03-10 23:02:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:02:22,231 INFO L93 Difference]: Finished difference Result 783 states and 1585 transitions. [2021-03-10 23:02:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-03-10 23:02:22,234 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:02:22,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:02:22,235 INFO L225 Difference]: With dead ends: 783 [2021-03-10 23:02:22,235 INFO L226 Difference]: Without dead ends: 745 [2021-03-10 23:02:22,236 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 10264.6ms TimeCoverageRelationStatistics Valid=1102, Invalid=9404, Unknown=0, NotChecked=0, Total=10506 [2021-03-10 23:02:22,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-03-10 23:02:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 490. [2021-03-10 23:02:22,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.18200408997955) internal successors, (1067), 489 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1067 transitions. [2021-03-10 23:02:22,241 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1067 transitions. Word has length 35 [2021-03-10 23:02:22,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:02:22,241 INFO L480 AbstractCegarLoop]: Abstraction has 490 states and 1067 transitions. [2021-03-10 23:02:22,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:22,241 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1067 transitions. [2021-03-10 23:02:22,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:02:22,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:02:22,242 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:02:22,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-03-10 23:02:22,455 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:02:22,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:02:22,455 INFO L82 PathProgramCache]: Analyzing trace with hash 349456309, now seen corresponding path program 94 times [2021-03-10 23:02:22,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:02:22,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886523585] [2021-03-10 23:02:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:02:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:02:23,046 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:02:23,226 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:02:23,393 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:02:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:23,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886523585] [2021-03-10 23:02:23,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251223351] [2021-03-10 23:02:23,503 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 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 [2021-03-10 23:02:23,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:02:23,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:02:23,522 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:02:23,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:02:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:24,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:02:24,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:02:24,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667444235] [2021-03-10 23:02:24,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:02:24,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:02:24,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:02:24,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:02:24,916 INFO L87 Difference]: Start difference. First operand 490 states and 1067 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:25,739 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-03-10 23:02:27,508 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 23:02:29,949 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-03-10 23:02:31,103 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-03-10 23:02:32,303 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-10 23:02:32,851 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-10 23:02:33,596 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-10 23:02:34,677 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 16 [2021-03-10 23:02:34,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:02:34,974 INFO L93 Difference]: Finished difference Result 853 states and 1717 transitions. [2021-03-10 23:02:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-03-10 23:02:34,977 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:02:34,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:02:34,978 INFO L225 Difference]: With dead ends: 853 [2021-03-10 23:02:34,978 INFO L226 Difference]: Without dead ends: 808 [2021-03-10 23:02:34,979 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2952 ImplicationChecksByTransitivity, 8824.2ms TimeCoverageRelationStatistics Valid=1198, Invalid=8504, Unknown=0, NotChecked=0, Total=9702 [2021-03-10 23:02:34,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-03-10 23:02:34,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 494. [2021-03-10 23:02:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 2.186612576064909) internal successors, (1078), 493 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1078 transitions. [2021-03-10 23:02:34,984 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1078 transitions. Word has length 35 [2021-03-10 23:02:34,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:02:34,984 INFO L480 AbstractCegarLoop]: Abstraction has 494 states and 1078 transitions. [2021-03-10 23:02:34,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:34,985 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1078 transitions. [2021-03-10 23:02:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:02:34,985 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:02:34,985 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:02:35,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:02:35,199 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:02:35,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:02:35,200 INFO L82 PathProgramCache]: Analyzing trace with hash -915471551, now seen corresponding path program 95 times [2021-03-10 23:02:35,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:02:35,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544378520] [2021-03-10 23:02:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:02:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:02:35,796 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:02:35,987 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-10 23:02:36,165 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:02:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:36,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544378520] [2021-03-10 23:02:36,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113435548] [2021-03-10 23:02:36,281 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 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 [2021-03-10 23:02:36,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:02:36,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:02:36,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:02:36,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:02:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:37,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:02:37,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:02:37,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902438345] [2021-03-10 23:02:37,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:02:37,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:02:37,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:02:37,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:02:37,760 INFO L87 Difference]: Start difference. First operand 494 states and 1078 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:38,649 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 16 [2021-03-10 23:02:40,313 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 14 [2021-03-10 23:02:40,609 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 17 [2021-03-10 23:02:43,600 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 18 [2021-03-10 23:02:44,086 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 20 [2021-03-10 23:02:44,687 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2021-03-10 23:02:45,046 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 19 [2021-03-10 23:02:45,367 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 23:02:46,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:02:46,682 INFO L93 Difference]: Finished difference Result 746 states and 1513 transitions. [2021-03-10 23:02:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-03-10 23:02:46,685 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:02:46,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:02:46,686 INFO L225 Difference]: With dead ends: 746 [2021-03-10 23:02:46,686 INFO L226 Difference]: Without dead ends: 719 [2021-03-10 23:02:46,687 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 8219.0ms TimeCoverageRelationStatistics Valid=1132, Invalid=7240, Unknown=0, NotChecked=0, Total=8372 [2021-03-10 23:02:46,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-03-10 23:02:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 388. [2021-03-10 23:02:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.111111111111111) internal successors, (817), 387 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 817 transitions. [2021-03-10 23:02:46,692 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 817 transitions. Word has length 35 [2021-03-10 23:02:46,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:02:46,692 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 817 transitions. [2021-03-10 23:02:46,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 817 transitions. [2021-03-10 23:02:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:02:46,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:02:46,692 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:02:46,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:02:46,893 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:02:46,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:02:46,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1600337107, now seen corresponding path program 96 times [2021-03-10 23:02:46,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:02:46,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316919019] [2021-03-10 23:02:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:02:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:02:47,599 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:02:47,783 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:02:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:47,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316919019] [2021-03-10 23:02:47,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481176972] [2021-03-10 23:02:47,901 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 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 [2021-03-10 23:02:47,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 23:02:47,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:02:47,921 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 23:02:47,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:02:49,514 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 23:02:49,923 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:02:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:02:50,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:02:50,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:02:50,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909603307] [2021-03-10 23:02:50,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:02:50,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:02:50,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:02:50,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:02:50,094 INFO L87 Difference]: Start difference. First operand 388 states and 817 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:02:57,139 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-03-10 23:02:58,038 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-03-10 23:02:58,236 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2021-03-10 23:02:58,523 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-03-10 23:02:58,798 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:02:58,970 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 23:02:59,328 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-03-10 23:02:59,885 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2021-03-10 23:03:00,216 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 23:03:00,515 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 18 [2021-03-10 23:03:00,717 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-03-10 23:03:01,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:01,075 INFO L93 Difference]: Finished difference Result 628 states and 1221 transitions. [2021-03-10 23:03:01,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-03-10 23:03:01,079 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:03:01,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:01,080 INFO L225 Difference]: With dead ends: 628 [2021-03-10 23:03:01,080 INFO L226 Difference]: Without dead ends: 590 [2021-03-10 23:03:01,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 10221.4ms TimeCoverageRelationStatistics Valid=1045, Invalid=8461, Unknown=0, NotChecked=0, Total=9506 [2021-03-10 23:03:01,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-03-10 23:03:01,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 392. [2021-03-10 23:03:01,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.1099744245524295) internal successors, (825), 391 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:01,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 825 transitions. [2021-03-10 23:03:01,086 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 825 transitions. Word has length 35 [2021-03-10 23:03:01,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:01,086 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 825 transitions. [2021-03-10 23:03:01,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 825 transitions. [2021-03-10 23:03:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:03:01,086 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:01,086 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:01,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:01,287 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:01,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:01,287 INFO L82 PathProgramCache]: Analyzing trace with hash -767912591, now seen corresponding path program 97 times [2021-03-10 23:03:01,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:01,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804835029] [2021-03-10 23:03:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:02,037 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:03:02,267 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:03:02,463 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:03:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:02,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804835029] [2021-03-10 23:03:02,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492972051] [2021-03-10 23:03:02,590 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 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 [2021-03-10 23:03:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:02,611 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:03:02,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:04,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:04,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:03:04,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000205632] [2021-03-10 23:03:04,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:03:04,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:04,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:03:04,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:03:04,210 INFO L87 Difference]: Start difference. First operand 392 states and 825 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:06,803 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 23:03:09,015 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-10 23:03:09,947 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2021-03-10 23:03:10,330 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-10 23:03:10,809 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2021-03-10 23:03:11,226 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2021-03-10 23:03:11,968 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-10 23:03:12,582 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-10 23:03:13,098 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:03:13,349 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-10 23:03:13,801 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:03:14,534 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 16 [2021-03-10 23:03:14,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:14,891 INFO L93 Difference]: Finished difference Result 697 states and 1347 transitions. [2021-03-10 23:03:14,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-03-10 23:03:14,895 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:03:14,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:14,896 INFO L225 Difference]: With dead ends: 697 [2021-03-10 23:03:14,896 INFO L226 Difference]: Without dead ends: 652 [2021-03-10 23:03:14,896 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 9829.4ms TimeCoverageRelationStatistics Valid=1195, Invalid=8705, Unknown=0, NotChecked=0, Total=9900 [2021-03-10 23:03:14,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-03-10 23:03:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 394. [2021-03-10 23:03:14,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.1119592875318065) internal successors, (830), 393 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 830 transitions. [2021-03-10 23:03:14,901 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 830 transitions. Word has length 35 [2021-03-10 23:03:14,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:14,901 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 830 transitions. [2021-03-10 23:03:14,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 830 transitions. [2021-03-10 23:03:14,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:03:14,902 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:14,902 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:15,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:15,119 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:15,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:15,120 INFO L82 PathProgramCache]: Analyzing trace with hash -2032840451, now seen corresponding path program 98 times [2021-03-10 23:03:15,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:15,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692697259] [2021-03-10 23:03:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:15,859 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:03:16,108 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-10 23:03:16,316 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:03:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:16,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692697259] [2021-03-10 23:03:16,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390329499] [2021-03-10 23:03:16,443 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 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 [2021-03-10 23:03:16,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:03:16,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:16,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:03:16,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:18,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:18,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:03:18,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122124998] [2021-03-10 23:03:18,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:03:18,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:18,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:03:18,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:03:18,150 INFO L87 Difference]: Start difference. First operand 394 states and 830 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:19,166 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2021-03-10 23:03:19,646 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2021-03-10 23:03:20,163 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2021-03-10 23:03:20,733 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2021-03-10 23:03:21,115 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 14 [2021-03-10 23:03:22,062 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2021-03-10 23:03:22,396 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 15 [2021-03-10 23:03:22,755 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2021-03-10 23:03:23,276 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 15 [2021-03-10 23:03:23,614 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 15 [2021-03-10 23:03:24,064 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2021-03-10 23:03:24,545 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2021-03-10 23:03:24,778 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2021-03-10 23:03:25,953 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2021-03-10 23:03:26,428 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 19 [2021-03-10 23:03:26,778 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 23:03:28,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:28,335 INFO L93 Difference]: Finished difference Result 615 states and 1206 transitions. [2021-03-10 23:03:28,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 23:03:28,337 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:03:28,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:28,338 INFO L225 Difference]: With dead ends: 615 [2021-03-10 23:03:28,338 INFO L226 Difference]: Without dead ends: 595 [2021-03-10 23:03:28,339 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 9429.7ms TimeCoverageRelationStatistics Valid=1118, Invalid=7254, Unknown=0, NotChecked=0, Total=8372 [2021-03-10 23:03:28,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-03-10 23:03:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 382. [2021-03-10 23:03:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.0918635170603674) internal successors, (797), 381 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:28,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 797 transitions. [2021-03-10 23:03:28,343 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 797 transitions. Word has length 35 [2021-03-10 23:03:28,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:28,343 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 797 transitions. [2021-03-10 23:03:28,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:28,343 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 797 transitions. [2021-03-10 23:03:28,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:03:28,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:28,344 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:28,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:03:28,544 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:28,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1796284973, now seen corresponding path program 99 times [2021-03-10 23:03:28,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:28,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151242689] [2021-03-10 23:03:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:29,083 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-03-10 23:03:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:29,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151242689] [2021-03-10 23:03:29,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615619289] [2021-03-10 23:03:29,524 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 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 [2021-03-10 23:03:29,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:03:29,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:29,544 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 23:03:29,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:31,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:31,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:03:31,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530587335] [2021-03-10 23:03:31,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:03:31,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:31,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:03:31,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:03:31,303 INFO L87 Difference]: Start difference. First operand 382 states and 797 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:31,731 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 23:03:32,205 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-10 23:03:32,622 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 23:03:32,969 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-10 23:03:33,474 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 23:03:34,405 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:03:34,788 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 23:03:35,030 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 23:03:35,817 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 23:03:36,187 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 23:03:36,563 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 23:03:37,557 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 23:03:37,957 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 23:03:38,182 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 23:03:39,096 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 23:03:39,594 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 23:03:40,152 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 23:03:40,509 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:03:41,161 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:03:41,391 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-10 23:03:42,226 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 23:03:42,398 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:03:42,647 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-03-10 23:03:43,072 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-03-10 23:03:43,690 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2021-03-10 23:03:44,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:44,292 INFO L93 Difference]: Finished difference Result 719 states and 1416 transitions. [2021-03-10 23:03:44,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-03-10 23:03:44,296 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:03:44,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:44,297 INFO L225 Difference]: With dead ends: 719 [2021-03-10 23:03:44,297 INFO L226 Difference]: Without dead ends: 671 [2021-03-10 23:03:44,297 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3822 ImplicationChecksByTransitivity, 11784.4ms TimeCoverageRelationStatistics Valid=1338, Invalid=10434, Unknown=0, NotChecked=0, Total=11772 [2021-03-10 23:03:44,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-03-10 23:03:44,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 398. [2021-03-10 23:03:44,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.0957178841309823) internal successors, (832), 397 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:44,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 832 transitions. [2021-03-10 23:03:44,302 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 832 transitions. Word has length 35 [2021-03-10 23:03:44,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:44,302 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 832 transitions. [2021-03-10 23:03:44,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:44,302 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 832 transitions. [2021-03-10 23:03:44,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:03:44,302 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:44,302 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:44,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-03-10 23:03:44,504 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:44,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:44,504 INFO L82 PathProgramCache]: Analyzing trace with hash 531357113, now seen corresponding path program 100 times [2021-03-10 23:03:44,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:44,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940963466] [2021-03-10 23:03:44,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:44,998 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-03-10 23:03:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:45,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940963466] [2021-03-10 23:03:45,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214535073] [2021-03-10 23:03:45,440 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 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 [2021-03-10 23:03:45,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:03:45,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:45,460 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:03:45,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:03:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:47,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:03:47,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:03:47,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026991333] [2021-03-10 23:03:47,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:03:47,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:03:47,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:03:47,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:03:47,107 INFO L87 Difference]: Start difference. First operand 398 states and 832 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:47,524 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 23:03:47,981 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 13 [2021-03-10 23:03:48,399 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-10 23:03:48,741 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 16 [2021-03-10 23:03:49,254 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-10 23:03:50,198 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:03:50,614 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-10 23:03:50,878 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 12 [2021-03-10 23:03:51,116 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 23:03:51,837 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 15 [2021-03-10 23:03:52,237 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-10 23:03:52,639 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 23:03:53,649 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-10 23:03:54,083 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-10 23:03:56,328 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2021-03-10 23:03:56,800 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 17 [2021-03-10 23:03:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:03:58,422 INFO L93 Difference]: Finished difference Result 719 states and 1410 transitions. [2021-03-10 23:03:58,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-03-10 23:03:58,426 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:03:58,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:03:58,427 INFO L225 Difference]: With dead ends: 719 [2021-03-10 23:03:58,427 INFO L226 Difference]: Without dead ends: 678 [2021-03-10 23:03:58,428 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3086 ImplicationChecksByTransitivity, 9959.5ms TimeCoverageRelationStatistics Valid=1245, Invalid=8457, Unknown=0, NotChecked=0, Total=9702 [2021-03-10 23:03:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-03-10 23:03:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 363. [2021-03-10 23:03:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.0552486187845305) internal successors, (744), 362 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 744 transitions. [2021-03-10 23:03:58,433 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 744 transitions. Word has length 35 [2021-03-10 23:03:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:03:58,433 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 744 transitions. [2021-03-10 23:03:58,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:03:58,433 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 744 transitions. [2021-03-10 23:03:58,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:03:58,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:03:58,433 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:03:58,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-03-10 23:03:58,647 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:03:58,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:03:58,647 INFO L82 PathProgramCache]: Analyzing trace with hash 850528961, now seen corresponding path program 101 times [2021-03-10 23:03:58,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:03:58,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40850566] [2021-03-10 23:03:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:03:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:03:58,991 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 23:03:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:03:59,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40850566] [2021-03-10 23:03:59,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893430015] [2021-03-10 23:03:59,962 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 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 [2021-03-10 23:03:59,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 23:03:59,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:03:59,983 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 23:03:59,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:02,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:02,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-03-10 23:04:02,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298382963] [2021-03-10 23:04:02,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:04:02,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:02,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:04:02,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:04:02,065 INFO L87 Difference]: Start difference. First operand 363 states and 744 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:02,374 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-10 23:04:02,620 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2021-03-10 23:04:02,971 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-03-10 23:04:03,251 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-03-10 23:04:03,613 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-03-10 23:04:03,983 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-03-10 23:04:04,402 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-03-10 23:04:04,682 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-10 23:04:05,074 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 23:04:05,464 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-03-10 23:04:05,799 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 23:04:06,126 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:04:06,382 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-03-10 23:04:06,805 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:04:07,159 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2021-03-10 23:04:07,498 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 24 [2021-03-10 23:04:07,737 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 23:04:08,024 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:04:08,241 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-10 23:04:08,420 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 17 [2021-03-10 23:04:08,835 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-03-10 23:04:09,283 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:04:09,723 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-03-10 23:04:10,178 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 23:04:10,508 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:04:10,706 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 18 [2021-03-10 23:04:11,128 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-03-10 23:04:11,484 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2021-03-10 23:04:11,739 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:04:12,218 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 23:04:12,516 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 23:04:12,963 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-03-10 23:04:13,484 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 23:04:13,747 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 23:04:14,119 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 23:04:14,435 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:04:14,714 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 23:04:14,953 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 23:04:15,437 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 23:04:15,850 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 23:04:16,233 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-10 23:04:16,985 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 23:04:17,512 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 23:04:18,139 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 23:04:18,606 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-10 23:04:18,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:18,658 INFO L93 Difference]: Finished difference Result 667 states and 1337 transitions. [2021-03-10 23:04:18,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-03-10 23:04:18,663 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:04:18,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:18,663 INFO L225 Difference]: With dead ends: 667 [2021-03-10 23:04:18,664 INFO L226 Difference]: Without dead ends: 641 [2021-03-10 23:04:18,664 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2194 ImplicationChecksByTransitivity, 15374.8ms TimeCoverageRelationStatistics Valid=874, Invalid=6098, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 23:04:18,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-03-10 23:04:18,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 403. [2021-03-10 23:04:18,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0497512437810945) internal successors, (824), 402 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:18,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 824 transitions. [2021-03-10 23:04:18,668 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 824 transitions. Word has length 35 [2021-03-10 23:04:18,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:18,668 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 824 transitions. [2021-03-10 23:04:18,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:18,668 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 824 transitions. [2021-03-10 23:04:18,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:04:18,669 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:18,669 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:18,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-03-10 23:04:18,875 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:18,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:18,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2098271295, now seen corresponding path program 102 times [2021-03-10 23:04:18,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:18,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509247457] [2021-03-10 23:04:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:19,263 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 23:04:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:04:20,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509247457] [2021-03-10 23:04:20,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156589258] [2021-03-10 23:04:20,053 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 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 [2021-03-10 23:04:20,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 23:04:20,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:20,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:04:20,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:21,450 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2021-03-10 23:04:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:21,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:21,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 29 [2021-03-10 23:04:21,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588034354] [2021-03-10 23:04:21,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:04:21,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:21,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:04:21,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:04:21,993 INFO L87 Difference]: Start difference. First operand 403 states and 824 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:22,343 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-03-10 23:04:22,617 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-10 23:04:22,947 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 23:04:23,302 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-10 23:04:23,702 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-10 23:04:24,009 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2021-03-10 23:04:24,318 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 23:04:24,688 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2021-03-10 23:04:25,111 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 26 [2021-03-10 23:04:25,635 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 23 [2021-03-10 23:04:26,321 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-10 23:04:26,725 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2021-03-10 23:04:27,072 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:04:27,301 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:04:27,597 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-10 23:04:27,968 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-03-10 23:04:28,283 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2021-03-10 23:04:28,553 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:04:28,895 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-10 23:04:29,166 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:04:29,355 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:04:29,575 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 23:04:29,864 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 23:04:30,260 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2021-03-10 23:04:30,450 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-10 23:04:30,619 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 23:04:30,890 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 23:04:31,172 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-03-10 23:04:31,601 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 22 [2021-03-10 23:04:31,862 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 23:04:32,193 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:04:32,667 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-03-10 23:04:33,017 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-03-10 23:04:33,322 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 23:04:34,559 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 23:04:34,898 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 23:04:35,197 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:04:35,486 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 23:04:35,878 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 23:04:36,196 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 23:04:36,636 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 23:04:37,221 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 23:04:37,843 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-10 23:04:37,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:37,885 INFO L93 Difference]: Finished difference Result 682 states and 1367 transitions. [2021-03-10 23:04:37,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 23:04:37,890 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 23:04:37,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:37,891 INFO L225 Difference]: With dead ends: 682 [2021-03-10 23:04:37,891 INFO L226 Difference]: Without dead ends: 656 [2021-03-10 23:04:37,891 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 13812.2ms TimeCoverageRelationStatistics Valid=800, Invalid=5842, Unknown=0, NotChecked=0, Total=6642 [2021-03-10 23:04:37,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-03-10 23:04:37,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 407. [2021-03-10 23:04:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0492610837438425) internal successors, (832), 406 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 832 transitions. [2021-03-10 23:04:37,895 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 832 transitions. Word has length 35 [2021-03-10 23:04:37,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:37,895 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 832 transitions. [2021-03-10 23:04:37,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 832 transitions. [2021-03-10 23:04:37,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 23:04:37,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:37,896 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:38,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-10 23:04:38,097 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:38,097 INFO L82 PathProgramCache]: Analyzing trace with hash 428848235, now seen corresponding path program 103 times [2021-03-10 23:04:38,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:38,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422234245] [2021-03-10 23:04:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:04:38,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422234245] [2021-03-10 23:04:38,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514637606] [2021-03-10 23:04:38,351 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 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 [2021-03-10 23:04:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:38,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:04:38,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:04:38,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:38,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 23:04:38,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828991910] [2021-03-10 23:04:38,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:04:38,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:38,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:04:38,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:04:38,751 INFO L87 Difference]: Start difference. First operand 407 states and 832 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:39,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:04:39,323 INFO L93 Difference]: Finished difference Result 628 states and 1249 transitions. [2021-03-10 23:04:39,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:04:39,327 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-10 23:04:39,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:04:39,328 INFO L225 Difference]: With dead ends: 628 [2021-03-10 23:04:39,328 INFO L226 Difference]: Without dead ends: 580 [2021-03-10 23:04:39,328 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 396.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:04:39,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-03-10 23:04:39,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 433. [2021-03-10 23:04:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.060185185185185) internal successors, (890), 432 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 890 transitions. [2021-03-10 23:04:39,332 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 890 transitions. Word has length 37 [2021-03-10 23:04:39,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:04:39,332 INFO L480 AbstractCegarLoop]: Abstraction has 433 states and 890 transitions. [2021-03-10 23:04:39,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:04:39,332 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 890 transitions. [2021-03-10 23:04:39,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 23:04:39,333 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:04:39,333 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:04:39,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-03-10 23:04:39,533 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:04:39,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:04:39,534 INFO L82 PathProgramCache]: Analyzing trace with hash 807325429, now seen corresponding path program 104 times [2021-03-10 23:04:39,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:04:39,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699884904] [2021-03-10 23:04:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:04:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:04:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:40,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699884904] [2021-03-10 23:04:40,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455946481] [2021-03-10 23:04:40,880 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 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 [2021-03-10 23:04:40,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:04:40,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:04:40,900 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 23:04:40,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:04:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:04:43,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:04:43,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-03-10 23:04:43,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701598586] [2021-03-10 23:04:43,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:04:43,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:04:43,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:04:43,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:04:43,411 INFO L87 Difference]: Start difference. First operand 433 states and 890 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 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) [2021-03-10 23:04:43,752 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 23:04:44,061 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-03-10 23:04:44,507 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 23:04:44,921 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-03-10 23:04:45,334 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-10 23:04:45,634 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-03-10 23:04:45,914 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 23:04:46,193 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2021-03-10 23:04:46,587 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 23:04:46,895 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-03-10 23:04:47,212 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:04:47,388 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-10 23:04:47,712 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2021-03-10 23:04:48,194 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 23:04:48,575 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-03-10 23:04:48,972 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-03-10 23:04:49,238 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 19 [2021-03-10 23:04:49,521 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 23:04:49,782 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 24 [2021-03-10 23:04:50,448 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 24 [2021-03-10 23:04:50,756 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 21 [2021-03-10 23:04:51,192 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-03-10 23:04:51,605 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 23:04:51,818 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2021-03-10 23:04:52,182 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-03-10 23:04:52,503 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-03-10 23:04:52,747 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 20 [2021-03-10 23:04:53,061 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 23:04:53,525 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2021-03-10 23:04:54,007 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-03-10 23:04:54,320 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2021-03-10 23:04:55,122 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2021-03-10 23:04:55,419 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-10 23:04:55,750 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-03-10 23:04:56,152 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-10 23:04:56,607 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-03-10 23:04:57,253 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-10 23:04:57,502 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:04:57,685 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2021-03-10 23:04:57,877 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2021-03-10 23:04:58,085 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 22 [2021-03-10 23:04:58,409 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-10 23:04:58,846 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 26 [2021-03-10 23:04:59,233 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-10 23:04:59,643 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-10 23:04:59,944 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-03-10 23:05:00,311 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-10 23:05:00,987 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-10 23:05:01,527 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 23:05:02,104 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-03-10 23:05:02,532 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2021-03-10 23:05:02,988 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 23 [2021-03-10 23:05:03,533 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-03-10 23:05:03,758 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 23:05:04,354 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-03-10 23:05:04,824 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-10 23:05:05,149 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-03-10 23:05:05,362 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 23:05:05,714 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-10 23:05:06,106 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 23:05:06,587 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 23:05:06,949 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-10 23:05:07,408 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 23:05:07,641 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-10 23:05:07,863 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2021-03-10 23:05:08,184 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 23:05:08,676 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-03-10 23:05:09,003 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 23:05:09,256 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 19 [2021-03-10 23:05:09,525 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2021-03-10 23:05:09,767 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2021-03-10 23:05:10,069 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 23:05:10,364 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-10 23:05:10,653 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 23:05:10,974 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:05:11,382 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 23:05:11,694 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-10 23:05:12,176 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-10 23:05:12,429 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-10 23:05:13,030 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 23:05:13,934 WARN L205 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-03-10 23:05:14,610 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-10 23:05:15,039 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-10 23:05:15,510 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-03-10 23:05:15,831 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2021-03-10 23:05:16,244 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-10 23:05:16,931 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2021-03-10 23:05:17,268 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 21 [2021-03-10 23:05:17,713 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 24 [2021-03-10 23:05:18,052 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 21 [2021-03-10 23:05:18,370 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-03-10 23:05:18,781 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:05:19,160 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:05:19,582 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 23:05:19,851 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-03-10 23:05:20,703 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-03-10 23:05:21,518 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-03-10 23:05:22,395 WARN L205 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-03-10 23:05:23,175 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-03-10 23:05:23,491 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-03-10 23:05:23,780 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 21 [2021-03-10 23:05:24,132 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-03-10 23:05:24,679 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 26 [2021-03-10 23:05:25,002 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:05:25,252 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 21 [2021-03-10 23:05:25,516 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-10 23:05:25,856 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 23:05:26,142 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-10 23:05:27,099 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-03-10 23:05:28,328 WARN L205 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-03-10 23:05:29,079 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-03-10 23:05:30,194 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-03-10 23:05:30,769 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 23 [2021-03-10 23:05:31,292 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2021-03-10 23:05:32,019 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2021-03-10 23:05:32,406 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 23 [2021-03-10 23:05:33,197 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-03-10 23:05:34,346 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 23:05:34,907 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:05:35,426 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 23:05:35,728 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 23:05:36,037 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 23:05:36,709 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-10 23:05:37,122 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-03-10 23:05:37,759 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-03-10 23:05:38,218 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-10 23:05:38,620 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-10 23:05:38,870 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:05:39,497 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-10 23:05:39,892 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-10 23:05:40,269 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:05:40,570 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 23:05:41,069 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2021-03-10 23:05:41,352 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2021-03-10 23:05:41,997 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 23:05:42,273 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:05:43,225 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-10 23:05:43,735 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:05:44,120 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 23:05:44,297 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-10 23:05:45,155 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 23:05:45,791 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-03-10 23:05:46,676 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-10 23:05:46,980 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-03-10 23:05:47,482 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 24 [2021-03-10 23:05:47,754 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2021-03-10 23:05:48,573 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-03-10 23:05:48,940 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-10 23:05:49,164 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 23:05:49,937 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2021-03-10 23:05:50,519 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 24 [2021-03-10 23:05:50,714 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 16 [2021-03-10 23:05:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:05:50,876 INFO L93 Difference]: Finished difference Result 1610 states and 3193 transitions. [2021-03-10 23:05:50,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-03-10 23:05:50,881 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 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 37 [2021-03-10 23:05:50,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:05:50,883 INFO L225 Difference]: With dead ends: 1610 [2021-03-10 23:05:50,883 INFO L226 Difference]: Without dead ends: 1542 [2021-03-10 23:05:50,885 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15558 ImplicationChecksByTransitivity, 57757.8ms TimeCoverageRelationStatistics Valid=4687, Invalid=33533, Unknown=0, NotChecked=0, Total=38220 [2021-03-10 23:05:50,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-03-10 23:05:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 593. [2021-03-10 23:05:50,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.097972972972973) internal successors, (1242), 592 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:50,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1242 transitions. [2021-03-10 23:05:50,894 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1242 transitions. Word has length 37 [2021-03-10 23:05:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:05:50,894 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1242 transitions. [2021-03-10 23:05:50,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 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) [2021-03-10 23:05:50,894 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1242 transitions. [2021-03-10 23:05:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 23:05:50,894 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:05:50,894 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:05:51,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-03-10 23:05:51,095 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:05:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:05:51,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1398345563, now seen corresponding path program 105 times [2021-03-10 23:05:51,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:05:51,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909949435] [2021-03-10 23:05:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:05:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:05:51,826 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 23:05:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:05:52,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909949435] [2021-03-10 23:05:52,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953640457] [2021-03-10 23:05:52,639 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 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 [2021-03-10 23:05:52,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:05:52,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:05:52,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 50 conjunts are in the unsatisfiable core [2021-03-10 23:05:52,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:05:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:05:55,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:05:55,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-03-10 23:05:55,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770249922] [2021-03-10 23:05:55,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:05:55,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:05:55,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:05:55,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:05:55,750 INFO L87 Difference]: Start difference. First operand 593 states and 1242 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:05:56,076 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 23:05:56,440 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-10 23:05:56,738 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 23:05:57,087 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-03-10 23:05:57,399 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 23:05:57,674 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 23:05:58,186 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 23:05:58,554 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:05:58,834 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 23:05:59,380 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2021-03-10 23:05:59,763 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-03-10 23:06:00,091 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 23:06:00,401 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-10 23:06:00,668 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:06:00,970 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 23:06:01,363 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 23:06:01,778 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 23:06:02,073 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 23:06:02,305 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-03-10 23:06:02,661 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 23:06:02,985 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:06:03,374 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 23:06:03,959 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 23:06:04,297 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-10 23:06:04,619 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:06:05,625 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:06:06,037 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:06:06,229 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:06:06,727 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-03-10 23:06:07,166 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:06:07,614 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-10 23:06:08,106 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-03-10 23:06:08,594 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-10 23:06:08,866 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:06:09,131 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:06:09,715 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2021-03-10 23:06:10,337 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2021-03-10 23:06:10,781 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-03-10 23:06:11,156 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:06:11,533 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 23:06:11,887 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:06:12,295 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:06:12,698 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-10 23:06:13,121 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 23:06:13,668 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-03-10 23:06:14,109 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:06:14,371 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:06:14,907 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-10 23:06:15,482 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:06:15,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:15,546 INFO L93 Difference]: Finished difference Result 957 states and 1930 transitions. [2021-03-10 23:06:15,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-10 23:06:15,552 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-10 23:06:15,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:15,553 INFO L225 Difference]: With dead ends: 957 [2021-03-10 23:06:15,553 INFO L226 Difference]: Without dead ends: 925 [2021-03-10 23:06:15,554 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3442 ImplicationChecksByTransitivity, 17753.5ms TimeCoverageRelationStatistics Valid=839, Invalid=9463, Unknown=0, NotChecked=0, Total=10302 [2021-03-10 23:06:15,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-03-10 23:06:15,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 612. [2021-03-10 23:06:15,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.0916530278232406) internal successors, (1278), 611 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:15,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1278 transitions. [2021-03-10 23:06:15,561 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1278 transitions. Word has length 37 [2021-03-10 23:06:15,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:15,561 INFO L480 AbstractCegarLoop]: Abstraction has 612 states and 1278 transitions. [2021-03-10 23:06:15,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:15,561 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1278 transitions. [2021-03-10 23:06:15,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 23:06:15,562 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:15,562 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:15,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:15,763 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:15,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:15,763 INFO L82 PathProgramCache]: Analyzing trace with hash -5079947, now seen corresponding path program 106 times [2021-03-10 23:06:15,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:15,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444094182] [2021-03-10 23:06:15,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:16,412 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 23:06:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:06:17,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444094182] [2021-03-10 23:06:17,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023110606] [2021-03-10 23:06:17,238 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 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 [2021-03-10 23:06:17,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:06:17,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:17,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 50 conjunts are in the unsatisfiable core [2021-03-10 23:06:17,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:20,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:20,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-03-10 23:06:20,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278023950] [2021-03-10 23:06:20,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:06:20,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:20,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:06:20,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:06:20,269 INFO L87 Difference]: Start difference. First operand 612 states and 1278 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:20,682 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-10 23:06:20,979 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 23:06:21,371 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:06:21,729 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-03-10 23:06:22,790 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 23:06:23,869 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 23:06:24,258 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:06:24,551 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 23:06:24,904 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-03-10 23:06:26,378 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:06:26,792 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:06:27,647 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:06:28,847 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:06:30,031 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:06:30,694 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-03-10 23:06:30,917 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:06:31,394 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 23:06:31,826 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-03-10 23:06:32,453 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 23:06:32,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:32,894 INFO L93 Difference]: Finished difference Result 904 states and 1819 transitions. [2021-03-10 23:06:32,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 23:06:32,895 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-10 23:06:32,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:32,896 INFO L225 Difference]: With dead ends: 904 [2021-03-10 23:06:32,896 INFO L226 Difference]: Without dead ends: 865 [2021-03-10 23:06:32,896 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 10759.2ms TimeCoverageRelationStatistics Valid=465, Invalid=5235, Unknown=0, NotChecked=0, Total=5700 [2021-03-10 23:06:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-03-10 23:06:32,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 532. [2021-03-10 23:06:32,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.096045197740113) internal successors, (1113), 531 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1113 transitions. [2021-03-10 23:06:32,902 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1113 transitions. Word has length 37 [2021-03-10 23:06:32,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:32,902 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 1113 transitions. [2021-03-10 23:06:32,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:32,902 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1113 transitions. [2021-03-10 23:06:32,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 23:06:32,903 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:32,903 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:33,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:06:33,117 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:33,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:33,117 INFO L82 PathProgramCache]: Analyzing trace with hash 278667387, now seen corresponding path program 107 times [2021-03-10 23:06:33,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:33,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243397353] [2021-03-10 23:06:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:33,786 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 23:06:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:06:34,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243397353] [2021-03-10 23:06:34,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76643143] [2021-03-10 23:06:34,688 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 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 [2021-03-10 23:06:34,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:06:34,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:34,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 50 conjunts are in the unsatisfiable core [2021-03-10 23:06:34,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:37,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:37,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-03-10 23:06:37,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228681563] [2021-03-10 23:06:37,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:06:37,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:37,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:06:37,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:06:37,729 INFO L87 Difference]: Start difference. First operand 532 states and 1113 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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) [2021-03-10 23:06:38,077 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-10 23:06:38,360 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 23:06:38,729 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:06:39,071 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-03-10 23:06:39,671 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-10 23:06:40,162 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 23:06:40,909 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-03-10 23:06:41,744 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 23:06:42,170 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:06:42,647 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-03-10 23:06:44,528 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:06:45,062 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:06:45,417 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2021-03-10 23:06:46,436 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2021-03-10 23:06:47,150 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:06:48,246 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:06:48,911 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-03-10 23:06:49,131 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:06:49,513 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 23:06:49,944 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-03-10 23:06:50,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:06:50,234 INFO L93 Difference]: Finished difference Result 801 states and 1628 transitions. [2021-03-10 23:06:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 23:06:50,240 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 37 [2021-03-10 23:06:50,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:06:50,241 INFO L225 Difference]: With dead ends: 801 [2021-03-10 23:06:50,241 INFO L226 Difference]: Without dead ends: 762 [2021-03-10 23:06:50,242 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 11150.0ms TimeCoverageRelationStatistics Valid=484, Invalid=5216, Unknown=0, NotChecked=0, Total=5700 [2021-03-10 23:06:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-03-10 23:06:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 549. [2021-03-10 23:06:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.0948905109489053) internal successors, (1148), 548 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:06:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1148 transitions. [2021-03-10 23:06:50,248 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1148 transitions. Word has length 37 [2021-03-10 23:06:50,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:06:50,248 INFO L480 AbstractCegarLoop]: Abstraction has 549 states and 1148 transitions. [2021-03-10 23:06:50,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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) [2021-03-10 23:06:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1148 transitions. [2021-03-10 23:06:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 23:06:50,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:06:50,249 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:06:50,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-03-10 23:06:50,467 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:06:50,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:06:50,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1136264889, now seen corresponding path program 108 times [2021-03-10 23:06:50,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:06:50,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757246482] [2021-03-10 23:06:50,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:06:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:06:50,921 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 23:06:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:52,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757246482] [2021-03-10 23:06:52,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415855567] [2021-03-10 23:06:52,330 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 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 [2021-03-10 23:06:52,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 23:06:52,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:06:52,354 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 23:06:52,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:06:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:06:55,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:06:55,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2021-03-10 23:06:55,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016887701] [2021-03-10 23:06:55,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:06:55,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:06:55,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:06:55,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:06:55,384 INFO L87 Difference]: Start difference. First operand 549 states and 1148 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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) [2021-03-10 23:06:55,765 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 23:06:56,147 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-03-10 23:06:56,668 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 23:06:57,137 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-03-10 23:06:57,823 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 23:06:58,211 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-03-10 23:06:58,658 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 23:06:58,823 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2021-03-10 23:06:59,437 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-10 23:07:00,091 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-03-10 23:07:00,563 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 23:07:00,833 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-03-10 23:07:01,606 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-03-10 23:07:02,015 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:07:02,515 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-03-10 23:07:02,925 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 23:07:03,404 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-10 23:07:03,944 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 23:07:04,412 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-10 23:07:04,894 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-10 23:07:05,194 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 23:07:05,477 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 19 [2021-03-10 23:07:05,852 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 23:07:06,267 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 23:07:06,646 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-10 23:07:07,108 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-10 23:07:07,444 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 23:07:07,867 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 23:07:08,112 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 23:07:08,691 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-10 23:07:09,259 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-10 23:07:09,767 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2021-03-10 23:07:10,137 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 21 [2021-03-10 23:07:10,614 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:07:11,157 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-03-10 23:07:11,813 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 23:07:12,357 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-10 23:07:12,713 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-10 23:07:13,047 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 23:07:13,410 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:07:13,880 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 23:07:14,081 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:07:14,420 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 23:07:14,734 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:07:15,025 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 20 [2021-03-10 23:07:15,619 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2021-03-10 23:07:16,048 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-10 23:07:16,450 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-10 23:07:16,888 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 23:07:17,249 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-10 23:07:17,709 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:07:18,120 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:07:18,579 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 23:07:19,119 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 23:07:19,647 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 22 [2021-03-10 23:07:20,147 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-03-10 23:07:20,877 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-10 23:07:21,370 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 23:07:21,693 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 23:07:21,989 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:07:22,310 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 23:07:22,677 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:07:22,982 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2021-03-10 23:07:23,511 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-03-10 23:07:24,085 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 23:07:24,460 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 23:07:24,825 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-10 23:07:25,253 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 23:07:25,483 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:07:26,015 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 23:07:26,484 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2021-03-10 23:07:27,088 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:07:27,822 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 23:07:28,481 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 23:07:29,416 WARN L205 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-10 23:07:29,801 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 23:07:30,109 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 19 [2021-03-10 23:07:30,544 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 23:07:31,452 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-10 23:07:32,178 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-03-10 23:07:32,707 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2021-03-10 23:07:33,140 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 21 [2021-03-10 23:07:34,290 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-03-10 23:07:35,237 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-03-10 23:07:36,201 WARN L205 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-03-10 23:07:37,508 WARN L205 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-03-10 23:07:37,895 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:07:38,199 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 21 [2021-03-10 23:07:38,593 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 23:07:39,404 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-03-10 23:07:40,703 WARN L205 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-03-10 23:07:41,889 WARN L205 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-03-10 23:07:42,666 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2021-03-10 23:07:43,083 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 23 [2021-03-10 23:07:43,431 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:07:44,439 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 23:07:44,991 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:07:45,417 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 23:07:45,679 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-03-10 23:07:46,008 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-10 23:07:46,867 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-03-10 23:07:47,348 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-10 23:07:48,028 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-10 23:07:49,018 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-10 23:07:49,860 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-10 23:07:50,625 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 23:07:51,258 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-03-10 23:07:52,116 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-10 23:07:52,636 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-10 23:07:53,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:07:53,091 INFO L93 Difference]: Finished difference Result 1528 states and 3121 transitions. [2021-03-10 23:07:53,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-03-10 23:07:53,098 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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 37 [2021-03-10 23:07:53,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:07:53,100 INFO L225 Difference]: With dead ends: 1528 [2021-03-10 23:07:53,100 INFO L226 Difference]: Without dead ends: 1502 [2021-03-10 23:07:53,101 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8027 ImplicationChecksByTransitivity, 50885.1ms TimeCoverageRelationStatistics Valid=2579, Invalid=18591, Unknown=0, NotChecked=0, Total=21170 [2021-03-10 23:07:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-03-10 23:07:53,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 569. [2021-03-10 23:07:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 2.091549295774648) internal successors, (1188), 568 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:07:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1188 transitions. [2021-03-10 23:07:53,111 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1188 transitions. Word has length 37 [2021-03-10 23:07:53,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:07:53,111 INFO L480 AbstractCegarLoop]: Abstraction has 569 states and 1188 transitions. [2021-03-10 23:07:53,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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) [2021-03-10 23:07:53,111 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1188 transitions. [2021-03-10 23:07:53,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:07:53,112 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:07:53,112 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:07:53,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:07:53,313 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:07:53,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:07:53,313 INFO L82 PathProgramCache]: Analyzing trace with hash -829971433, now seen corresponding path program 109 times [2021-03-10 23:07:53,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:07:53,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334034709] [2021-03-10 23:07:53,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:07:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:54,862 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:07:55,213 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:07:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:55,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334034709] [2021-03-10 23:07:55,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975408640] [2021-03-10 23:07:55,465 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 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 [2021-03-10 23:07:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:07:55,487 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:07:55,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:07:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:07:58,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:07:58,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-03-10 23:07:58,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517301516] [2021-03-10 23:07:58,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-03-10 23:07:58,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:07:58,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-03-10 23:07:58,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:07:58,587 INFO L87 Difference]: Start difference. First operand 569 states and 1188 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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) [2021-03-10 23:08:00,353 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 23:08:02,675 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2021-03-10 23:08:03,368 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2021-03-10 23:08:03,577 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-03-10 23:08:03,840 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:08:04,566 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:08:05,466 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-03-10 23:08:05,793 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-03-10 23:08:06,188 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 23:08:06,538 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 23:08:07,143 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 23:08:07,308 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-03-10 23:08:07,719 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-03-10 23:08:08,004 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-03-10 23:08:08,294 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:08:08,502 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:08:08,843 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2021-03-10 23:08:09,594 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:08:09,896 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-03-10 23:08:10,272 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-03-10 23:08:10,838 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 23:08:11,123 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-03-10 23:08:11,457 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-03-10 23:08:12,001 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:08:12,286 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-03-10 23:08:12,657 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-03-10 23:08:13,203 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 23:08:13,477 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-10 23:08:13,713 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-03-10 23:08:14,124 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:08:14,361 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:08:14,634 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2021-03-10 23:08:14,981 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-10 23:08:15,454 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-03-10 23:08:15,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:08:15,879 INFO L93 Difference]: Finished difference Result 1117 states and 2277 transitions. [2021-03-10 23:08:15,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-03-10 23:08:15,885 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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 39 [2021-03-10 23:08:15,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:08:15,886 INFO L225 Difference]: With dead ends: 1117 [2021-03-10 23:08:15,886 INFO L226 Difference]: Without dead ends: 1050 [2021-03-10 23:08:15,887 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 16508.2ms TimeCoverageRelationStatistics Valid=1130, Invalid=7800, Unknown=0, NotChecked=0, Total=8930 [2021-03-10 23:08:15,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-03-10 23:08:15,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 697. [2021-03-10 23:08:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.1695402298850577) internal successors, (1510), 696 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1510 transitions. [2021-03-10 23:08:15,896 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1510 transitions. Word has length 39 [2021-03-10 23:08:15,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:08:15,896 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 1510 transitions. [2021-03-10 23:08:15,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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) [2021-03-10 23:08:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1510 transitions. [2021-03-10 23:08:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:08:15,897 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:08:15,897 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:08:16,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:16,097 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:08:16,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:08:16,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1236547937, now seen corresponding path program 110 times [2021-03-10 23:08:16,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:08:16,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935395645] [2021-03-10 23:08:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:08:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:17,682 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:08:18,045 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:08:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:18,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935395645] [2021-03-10 23:08:18,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106098462] [2021-03-10 23:08:18,286 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 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 [2021-03-10 23:08:18,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:08:18,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:08:18,309 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:08:18,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:21,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:21,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-03-10 23:08:21,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817751783] [2021-03-10 23:08:21,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-03-10 23:08:21,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:21,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-03-10 23:08:21,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:08:21,971 INFO L87 Difference]: Start difference. First operand 697 states and 1510 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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) [2021-03-10 23:08:24,065 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 23:08:27,260 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:08:28,027 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:08:29,046 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-03-10 23:08:29,686 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 23:08:30,295 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-03-10 23:08:30,586 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:08:31,127 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-03-10 23:08:31,496 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-03-10 23:08:31,887 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:08:32,389 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-03-10 23:08:32,774 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-03-10 23:08:33,257 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:08:33,616 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:08:34,845 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:08:35,396 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-03-10 23:08:35,774 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-03-10 23:08:36,488 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 23:08:36,769 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-03-10 23:08:37,103 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-03-10 23:08:37,686 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:08:37,969 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-03-10 23:08:38,366 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-03-10 23:08:38,928 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 23:08:39,227 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-10 23:08:39,498 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-03-10 23:08:39,923 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:08:40,196 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:08:40,475 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2021-03-10 23:08:40,877 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-10 23:08:41,390 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-03-10 23:08:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:08:41,937 INFO L93 Difference]: Finished difference Result 1149 states and 2330 transitions. [2021-03-10 23:08:41,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-03-10 23:08:41,943 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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 39 [2021-03-10 23:08:41,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:08:41,944 INFO L225 Difference]: With dead ends: 1149 [2021-03-10 23:08:41,945 INFO L226 Difference]: Without dead ends: 1093 [2021-03-10 23:08:41,946 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2946 ImplicationChecksByTransitivity, 17794.0ms TimeCoverageRelationStatistics Valid=1214, Invalid=8686, Unknown=0, NotChecked=0, Total=9900 [2021-03-10 23:08:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-03-10 23:08:41,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 699. [2021-03-10 23:08:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.169054441260745) internal successors, (1514), 698 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:08:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1514 transitions. [2021-03-10 23:08:41,961 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1514 transitions. Word has length 39 [2021-03-10 23:08:41,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:08:41,961 INFO L480 AbstractCegarLoop]: Abstraction has 699 states and 1514 transitions. [2021-03-10 23:08:41,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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) [2021-03-10 23:08:41,961 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1514 transitions. [2021-03-10 23:08:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:08:41,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:08:41,962 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:08:42,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:08:42,163 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:08:42,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:08:42,163 INFO L82 PathProgramCache]: Analyzing trace with hash 907136483, now seen corresponding path program 111 times [2021-03-10 23:08:42,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:08:42,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720779548] [2021-03-10 23:08:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:08:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:08:43,710 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:08:44,107 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:08:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:44,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720779548] [2021-03-10 23:08:44,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857554052] [2021-03-10 23:08:44,407 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 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 [2021-03-10 23:08:44,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 23:08:44,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:08:44,435 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:08:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:08:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:08:47,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:08:47,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-03-10 23:08:47,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748585687] [2021-03-10 23:08:47,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-03-10 23:08:47,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:08:47,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-03-10 23:08:47,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:08:47,937 INFO L87 Difference]: Start difference. First operand 699 states and 1514 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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) [2021-03-10 23:08:49,711 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 23:08:51,903 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:08:52,883 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:08:53,641 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:08:54,690 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-03-10 23:08:55,374 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 23:08:56,086 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:08:56,636 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-03-10 23:08:57,013 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2021-03-10 23:08:57,408 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-10 23:08:57,903 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-03-10 23:08:58,245 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-03-10 23:08:58,487 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:08:58,947 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:08:59,804 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-03-10 23:09:00,164 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 23:09:00,616 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-03-10 23:09:01,149 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-03-10 23:09:01,755 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:09:02,713 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 23:09:02,887 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-03-10 23:09:03,235 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-03-10 23:09:03,580 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-03-10 23:09:04,289 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:09:04,579 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-03-10 23:09:04,964 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-03-10 23:09:05,545 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 23:09:05,831 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-10 23:09:06,062 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-03-10 23:09:06,501 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:09:06,724 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:09:07,000 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2021-03-10 23:09:07,350 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-10 23:09:07,830 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-03-10 23:09:08,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:09:08,263 INFO L93 Difference]: Finished difference Result 1147 states and 2328 transitions. [2021-03-10 23:09:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-10 23:09:08,270 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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 39 [2021-03-10 23:09:08,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:09:08,272 INFO L225 Difference]: With dead ends: 1147 [2021-03-10 23:09:08,272 INFO L226 Difference]: Without dead ends: 1097 [2021-03-10 23:09:08,273 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 18824.8ms TimeCoverageRelationStatistics Valid=1311, Invalid=9609, Unknown=0, NotChecked=0, Total=10920 [2021-03-10 23:09:08,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-03-10 23:09:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 701. [2021-03-10 23:09:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.1685714285714286) internal successors, (1518), 700 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1518 transitions. [2021-03-10 23:09:08,283 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1518 transitions. Word has length 39 [2021-03-10 23:09:08,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:09:08,283 INFO L480 AbstractCegarLoop]: Abstraction has 701 states and 1518 transitions. [2021-03-10 23:09:08,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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) [2021-03-10 23:09:08,283 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1518 transitions. [2021-03-10 23:09:08,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:09:08,284 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:09:08,284 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:09:08,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-03-10 23:09:08,485 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:09:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:09:08,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1937298983, now seen corresponding path program 112 times [2021-03-10 23:09:08,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:09:08,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875684119] [2021-03-10 23:09:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:09:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:09:10,118 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:09:10,510 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:09:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:10,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875684119] [2021-03-10 23:09:10,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533499340] [2021-03-10 23:09:10,785 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 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 [2021-03-10 23:09:10,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:09:10,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:09:10,813 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:09:10,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:09:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:14,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:09:14,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-03-10 23:09:14,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430723736] [2021-03-10 23:09:14,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-03-10 23:09:14,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:09:14,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-03-10 23:09:14,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:09:14,260 INFO L87 Difference]: Start difference. First operand 701 states and 1518 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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) [2021-03-10 23:09:15,830 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 23:09:16,029 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-03-10 23:09:17,244 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:09:18,572 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:09:19,863 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2021-03-10 23:09:20,136 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:09:21,096 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:09:22,339 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-03-10 23:09:22,683 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2021-03-10 23:09:22,920 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-03-10 23:09:23,256 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 23:09:23,589 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-03-10 23:09:23,990 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:09:24,571 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-03-10 23:09:24,958 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2021-03-10 23:09:25,357 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-10 23:09:25,857 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-03-10 23:09:26,178 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-03-10 23:09:26,437 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:09:26,940 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:09:27,876 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 23:09:28,303 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-03-10 23:09:29,018 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:09:29,609 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-03-10 23:09:29,973 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:09:30,302 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-03-10 23:09:30,759 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2021-03-10 23:09:31,236 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 23:09:32,225 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:09:32,417 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-03-10 23:09:32,746 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-03-10 23:09:33,154 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-03-10 23:09:33,886 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 23:09:34,200 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-10 23:09:34,450 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-03-10 23:09:34,900 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:09:35,141 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:09:35,436 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2021-03-10 23:09:35,754 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-10 23:09:36,228 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-03-10 23:09:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:09:36,644 INFO L93 Difference]: Finished difference Result 1145 states and 2326 transitions. [2021-03-10 23:09:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-03-10 23:09:36,652 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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 39 [2021-03-10 23:09:36,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:09:36,654 INFO L225 Difference]: With dead ends: 1145 [2021-03-10 23:09:36,654 INFO L226 Difference]: Without dead ends: 1101 [2021-03-10 23:09:36,655 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3673 ImplicationChecksByTransitivity, 20765.5ms TimeCoverageRelationStatistics Valid=1433, Invalid=10557, Unknown=0, NotChecked=0, Total=11990 [2021-03-10 23:09:36,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-03-10 23:09:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 703. [2021-03-10 23:09:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.168091168091168) internal successors, (1522), 702 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:09:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1522 transitions. [2021-03-10 23:09:36,665 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1522 transitions. Word has length 39 [2021-03-10 23:09:36,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:09:36,665 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1522 transitions. [2021-03-10 23:09:36,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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) [2021-03-10 23:09:36,665 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1522 transitions. [2021-03-10 23:09:36,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:09:36,666 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:09:36,666 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:09:36,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-03-10 23:09:36,867 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:09:36,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:09:36,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1261625493, now seen corresponding path program 113 times [2021-03-10 23:09:36,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:09:36,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775868098] [2021-03-10 23:09:36,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:09:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:09:38,526 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:09:38,927 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:09:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:39,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775868098] [2021-03-10 23:09:39,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707021657] [2021-03-10 23:09:39,214 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 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 [2021-03-10 23:09:39,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 23:09:39,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:09:39,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:09:39,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:09:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:09:43,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:09:43,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-03-10 23:09:43,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075616358] [2021-03-10 23:09:43,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-03-10 23:09:43,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:09:43,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-03-10 23:09:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:09:43,002 INFO L87 Difference]: Start difference. First operand 703 states and 1522 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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) [2021-03-10 23:09:44,796 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 23:09:45,352 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:09:46,647 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-03-10 23:09:47,001 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:09:48,738 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:09:49,444 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2021-03-10 23:09:50,542 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2021-03-10 23:09:50,852 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:09:51,785 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:09:52,954 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-03-10 23:09:53,803 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 23:09:54,195 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-03-10 23:09:54,620 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:09:55,225 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-03-10 23:09:55,605 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2021-03-10 23:09:55,946 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-10 23:09:56,384 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-03-10 23:09:56,933 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:09:57,429 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:09:58,485 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 23:09:58,915 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2021-03-10 23:09:59,398 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2021-03-10 23:09:59,733 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:10:00,449 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:10:00,762 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2021-03-10 23:10:01,556 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 23:10:02,173 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-03-10 23:10:02,604 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 23:10:03,019 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2021-03-10 23:10:03,594 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-03-10 23:10:04,061 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:10:04,401 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-03-10 23:10:05,183 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 23:10:05,370 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-03-10 23:10:05,726 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-10 23:10:06,029 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-03-10 23:10:06,507 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:10:06,901 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 23:10:07,208 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 23:10:07,518 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2021-03-10 23:10:07,978 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-10 23:10:08,540 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-03-10 23:10:09,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:10:09,236 INFO L93 Difference]: Finished difference Result 1143 states and 2324 transitions. [2021-03-10 23:10:09,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-03-10 23:10:09,246 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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 39 [2021-03-10 23:10:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:10:09,248 INFO L225 Difference]: With dead ends: 1143 [2021-03-10 23:10:09,248 INFO L226 Difference]: Without dead ends: 1105 [2021-03-10 23:10:09,249 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4061 ImplicationChecksByTransitivity, 22039.6ms TimeCoverageRelationStatistics Valid=1580, Invalid=11530, Unknown=0, NotChecked=0, Total=13110 [2021-03-10 23:10:09,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-03-10 23:10:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 705. [2021-03-10 23:10:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.1676136363636362) internal successors, (1526), 704 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1526 transitions. [2021-03-10 23:10:09,259 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1526 transitions. Word has length 39 [2021-03-10 23:10:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:10:09,259 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 1526 transitions. [2021-03-10 23:10:09,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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) [2021-03-10 23:10:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1526 transitions. [2021-03-10 23:10:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:10:09,260 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:10:09,260 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:10:09,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-03-10 23:10:09,479 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:10:09,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:10:09,479 INFO L82 PathProgramCache]: Analyzing trace with hash -429200977, now seen corresponding path program 114 times [2021-03-10 23:10:09,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:10:09,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771165766] [2021-03-10 23:10:09,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:10:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:10:11,195 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:10:11,656 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:10:12,121 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:10:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:12,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771165766] [2021-03-10 23:10:12,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771158289] [2021-03-10 23:10:12,440 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 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 [2021-03-10 23:10:12,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 23:10:12,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:10:12,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-03-10 23:10:12,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:10:15,301 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-10 23:10:15,730 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-03-10 23:10:16,183 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-03-10 23:10:16,676 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 23:10:17,093 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:10:17,599 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:10:18,235 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:10:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:10:18,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:10:18,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-03-10 23:10:18,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106843021] [2021-03-10 23:10:18,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-03-10 23:10:18,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:10:18,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-03-10 23:10:18,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:10:18,645 INFO L87 Difference]: Start difference. First operand 705 states and 1526 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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) [2021-03-10 23:10:19,770 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-03-10 23:10:20,501 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-03-10 23:10:21,004 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-03-10 23:10:22,313 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 23:10:22,539 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-03-10 23:10:22,934 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:10:24,095 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-03-10 23:10:24,515 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:10:25,158 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 23:10:26,733 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:10:27,521 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2021-03-10 23:10:28,650 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2021-03-10 23:10:28,960 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:10:30,115 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:10:30,521 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-03-10 23:10:31,502 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-03-10 23:10:31,831 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-03-10 23:10:32,273 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2021-03-10 23:10:32,876 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 23:10:33,543 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 23:10:33,965 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-03-10 23:10:34,494 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 23:10:35,402 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2021-03-10 23:10:35,684 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-03-10 23:10:36,104 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 17 [2021-03-10 23:10:36,650 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-03-10 23:10:37,263 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-03-10 23:10:37,720 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 15 [2021-03-10 23:10:38,014 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:10:38,624 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-03-10 23:10:39,360 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-10 23:10:40,173 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-10 23:10:40,764 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2021-03-10 23:10:41,238 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2021-03-10 23:10:41,723 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-03-10 23:10:42,316 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 14 [2021-03-10 23:10:42,956 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:10:43,376 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-10 23:10:44,141 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2021-03-10 23:10:44,729 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2021-03-10 23:10:45,124 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2021-03-10 23:10:45,686 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-03-10 23:10:46,337 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 15 [2021-03-10 23:10:46,960 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 22 [2021-03-10 23:10:47,320 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-10 23:10:47,972 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-03-10 23:10:48,740 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 23:10:49,089 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2021-03-10 23:10:49,582 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-03-10 23:10:50,232 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 14 [2021-03-10 23:10:51,184 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 23:10:51,550 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2021-03-10 23:10:52,248 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 15 [2021-03-10 23:10:52,787 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 20 [2021-03-10 23:10:53,285 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2021-03-10 23:10:53,684 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-10 23:10:54,214 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 19 [2021-03-10 23:10:54,983 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 21 [2021-03-10 23:10:55,588 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-10 23:10:56,507 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-03-10 23:10:56,959 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2021-03-10 23:10:57,559 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-10 23:10:58,153 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 18 [2021-03-10 23:10:58,874 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 16 [2021-03-10 23:10:59,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:10:59,753 INFO L93 Difference]: Finished difference Result 1210 states and 2447 transitions. [2021-03-10 23:10:59,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-03-10 23:10:59,762 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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 39 [2021-03-10 23:10:59,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:10:59,764 INFO L225 Difference]: With dead ends: 1210 [2021-03-10 23:10:59,764 INFO L226 Difference]: Without dead ends: 1165 [2021-03-10 23:10:59,766 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4965 ImplicationChecksByTransitivity, 36318.0ms TimeCoverageRelationStatistics Valid=1875, Invalid=14637, Unknown=0, NotChecked=0, Total=16512 [2021-03-10 23:10:59,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-03-10 23:10:59,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 708. [2021-03-10 23:10:59,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 2.16973125884017) internal successors, (1534), 707 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:10:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1534 transitions. [2021-03-10 23:10:59,776 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1534 transitions. Word has length 39 [2021-03-10 23:10:59,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:10:59,776 INFO L480 AbstractCegarLoop]: Abstraction has 708 states and 1534 transitions. [2021-03-10 23:10:59,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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) [2021-03-10 23:10:59,777 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1534 transitions. [2021-03-10 23:10:59,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:10:59,777 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:10:59,777 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:10:59,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:10:59,998 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:10:59,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:10:59,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1694128837, now seen corresponding path program 115 times [2021-03-10 23:10:59,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:10:59,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149868367] [2021-03-10 23:10:59,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:01,931 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:11:02,497 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-10 23:11:02,945 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:11:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:03,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149868367] [2021-03-10 23:11:03,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220395033] [2021-03-10 23:11:03,262 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 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 [2021-03-10 23:11:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:03,287 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:11:03,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:06,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:06,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-03-10 23:11:06,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643073446] [2021-03-10 23:11:06,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-03-10 23:11:06,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:06,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-03-10 23:11:06,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:11:06,765 INFO L87 Difference]: Start difference. First operand 708 states and 1534 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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) [2021-03-10 23:11:07,868 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-03-10 23:11:08,521 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-03-10 23:11:09,075 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 16 [2021-03-10 23:11:10,323 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 23:11:10,564 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-03-10 23:11:10,958 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 Received shutdown request... [2021-03-10 23:11:11,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:11:11,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:11,383 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 23:11:11,389 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 23:11:11,389 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 11:11:11 BasicIcfg [2021-03-10 23:11:11,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 23:11:11,390 INFO L168 Benchmark]: Toolchain (without parser) took 843923.15 ms. Allocated memory was 255.9 MB in the beginning and 557.8 MB in the end (delta: 302.0 MB). Free memory was 237.2 MB in the beginning and 426.3 MB in the end (delta: -189.1 MB). Peak memory consumption was 113.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:11:11,390 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 238.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:11:11,390 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.78 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 235.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:11:11,390 INFO L168 Benchmark]: Boogie Preprocessor took 11.60 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.3 MB in the end (delta: 961.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:11:11,390 INFO L168 Benchmark]: RCFGBuilder took 246.06 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 236.8 MB in the end (delta: -2.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.0 GB. [2021-03-10 23:11:11,391 INFO L168 Benchmark]: TraceAbstraction took 843628.23 ms. Allocated memory was 255.9 MB in the beginning and 557.8 MB in the end (delta: 302.0 MB). Free memory was 236.8 MB in the beginning and 426.3 MB in the end (delta: -189.5 MB). Peak memory consumption was 112.4 MB. Max. memory is 16.0 GB. [2021-03-10 23:11:11,391 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 238.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.78 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 235.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.60 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.3 MB in the end (delta: 961.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 246.06 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 236.8 MB in the end (delta: -2.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 843628.23 ms. Allocated memory was 255.9 MB in the beginning and 557.8 MB in the end (delta: 302.0 MB). Free memory was 236.8 MB in the beginning and 426.3 MB in the end (delta: -189.5 MB). Peak memory consumption was 112.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 50). Cancelled while BasicCegarLoop was constructing difference of abstraction (708states) and FLOYD_HOARE automaton (currently 19 states, 39 states before enhancement),while ReachableStatesComputation was computing reachable states (33 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 843564.1ms, OverallIterations: 117, TraceHistogramMax: 6, EmptinessCheckTime: 75.6ms, AutomataDifference: 660174.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4510 SDtfs, 24642 SDslu, 58021 SDs, 0 SdLazy, 122454 SolverSat, 7291 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 68337.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9935 GetRequests, 1813 SyntacticMatches, 136 SemanticMatches, 7986 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210337 ImplicationChecksByTransitivity, 598372.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=708occurred in iteration=116, InterpolantAutomatonStates: 6403, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 620.8ms AutomataMinimizationTime, 116 MinimizatonAttempts, 26108 StatesRemovedByMinimization, 116 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 329.3ms SsaConstructionTime, 1194.7ms SatisfiabilityAnalysisTime, 155486.0ms InterpolantComputationTime, 6662 NumberOfCodeBlocks, 6662 NumberOfCodeBlocksAsserted, 485 NumberOfCheckSat, 6430 ConstructedInterpolants, 0 QuantifiedInterpolants, 97004 SizeOfPredicates, 560 NumberOfNonLiveVariables, 7195 ConjunctsInSsa, 4069 ConjunctsInUnsatCore, 232 InterpolantComputations, 2 PerfectInterpolantSequences, 660/6471 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