/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/figure1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:48:32,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:48:32,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:48:32,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:48:32,404 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 22:48:32,437 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:48:32,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:48:32,438 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:48:32,438 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:48:32,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:48:32,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:48:32,441 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:48:32,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:48:32,441 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:48:32,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:48:32,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:48:32,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:48:32,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:48:32,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:48:32,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:48:32,443 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:48:32,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:48:32,443 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:48:32,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:48:32,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:48:32,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:48:32,444 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:48:32,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:48:32,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:48:32,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:48:32,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:48:32,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:48:32,445 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:48:32,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:48:32,445 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:48:32,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:48:32,445 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:48:32,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:48:32,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:48:32,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:48:32,767 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:48:32,768 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:48:32,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl [2021-06-05 22:48:32,769 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl' [2021-06-05 22:48:32,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:48:32,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:48:32,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:48:32,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:48:32,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:48:32,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:48:32" (1/1) ... [2021-06-05 22:48:32,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:48:32" (1/1) ... [2021-06-05 22:48:32,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:48:32,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:48:32,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:48:32,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:48:32,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:48:32" (1/1) ... [2021-06-05 22:48:32,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:48:32" (1/1) ... [2021-06-05 22:48:32,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:48:32" (1/1) ... [2021-06-05 22:48:32,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:48:32" (1/1) ... [2021-06-05 22:48:32,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:48:32" (1/1) ... [2021-06-05 22:48:32,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:48:32" (1/1) ... [2021-06-05 22:48:32,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:48:32" (1/1) ... [2021-06-05 22:48:32,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:48:32,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:48:32,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:48:32,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:48:32,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:48:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:48:32,934 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:48:32,934 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:48:32,934 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:48:32,934 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:48:32,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:48:32,935 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:48:32,935 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:48:32,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:48:32,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:48:32,936 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 22:48:33,164 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:48:33,164 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 22:48:33,166 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:48:33 BoogieIcfgContainer [2021-06-05 22:48:33,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:48:33,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:48:33,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:48:33,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:48:33,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:48:32" (1/2) ... [2021-06-05 22:48:33,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d751bca and model type figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:48:33, skipping insertion in model container [2021-06-05 22:48:33,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:48:33" (2/2) ... [2021-06-05 22:48:33,172 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1.wvr.bpl [2021-06-05 22:48:33,176 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:48:33,177 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:48:33,177 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:48:33,177 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:48:33,239 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 22:48:33,266 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 22:48:33,283 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:48:33,283 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:48:33,283 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:48:33,283 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:48:33,283 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:48:33,283 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:48:33,283 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:48:33,283 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:48:33,291 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-06-05 22:48:33,299 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-06-05 22:48:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-06-05 22:48:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:48:33,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:33,306 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:33,307 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:33,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:33,311 INFO L82 PathProgramCache]: Analyzing trace with hash -155133599, now seen corresponding path program 1 times [2021-06-05 22:48:33,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:33,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919431540] [2021-06-05 22:48:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:33,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:33,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919431540] [2021-06-05 22:48:33,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919431540] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:48:33,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:48:33,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:48:33,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109388610] [2021-06-05 22:48:33,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:48:33,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:33,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:48:33,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:48:33,477 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:33,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:33,512 INFO L93 Difference]: Finished difference Result 57 states and 100 transitions. [2021-06-05 22:48:33,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:48:33,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:48:33,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:33,528 INFO L225 Difference]: With dead ends: 57 [2021-06-05 22:48:33,529 INFO L226 Difference]: Without dead ends: 42 [2021-06-05 22:48:33,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:48:33,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-06-05 22:48:33,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-06-05 22:48:33,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 71 transitions. [2021-06-05 22:48:33,565 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 71 transitions. Word has length 14 [2021-06-05 22:48:33,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:33,566 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 71 transitions. [2021-06-05 22:48:33,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:33,567 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 71 transitions. [2021-06-05 22:48:33,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:48:33,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:33,568 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:33,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:48:33,569 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:33,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1800134561, now seen corresponding path program 1 times [2021-06-05 22:48:33,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:33,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68902780] [2021-06-05 22:48:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:33,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:33,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68902780] [2021-06-05 22:48:33,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68902780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:33,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332787597] [2021-06-05 22:48:33,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:33,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 22:48:33,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:33,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332787597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:33,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:33,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 22:48:33,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889489735] [2021-06-05 22:48:33,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:48:33,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:33,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:48:33,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:48:33,811 INFO L87 Difference]: Start difference. First operand 40 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:33,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:33,924 INFO L93 Difference]: Finished difference Result 63 states and 108 transitions. [2021-06-05 22:48:33,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:48:33,924 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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 16 [2021-06-05 22:48:33,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:33,925 INFO L225 Difference]: With dead ends: 63 [2021-06-05 22:48:33,926 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 22:48:33,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:48:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 22:48:33,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-06-05 22:48:33,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:33,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 80 transitions. [2021-06-05 22:48:33,933 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 80 transitions. Word has length 16 [2021-06-05 22:48:33,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:33,933 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 80 transitions. [2021-06-05 22:48:33,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:33,934 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 80 transitions. [2021-06-05 22:48:33,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:48:33,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:33,935 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:34,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 22:48:34,159 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:34,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:34,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1152959347, now seen corresponding path program 2 times [2021-06-05 22:48:34,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:34,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688717476] [2021-06-05 22:48:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:34,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:34,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688717476] [2021-06-05 22:48:34,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688717476] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:48:34,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:48:34,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:48:34,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171653418] [2021-06-05 22:48:34,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:48:34,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:34,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:48:34,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:48:34,220 INFO L87 Difference]: Start difference. First operand 45 states and 80 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:34,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:34,301 INFO L93 Difference]: Finished difference Result 50 states and 88 transitions. [2021-06-05 22:48:34,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:48:34,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:48:34,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:34,306 INFO L225 Difference]: With dead ends: 50 [2021-06-05 22:48:34,312 INFO L226 Difference]: Without dead ends: 48 [2021-06-05 22:48:34,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:48:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-05 22:48:34,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2021-06-05 22:48:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:34,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 76 transitions. [2021-06-05 22:48:34,320 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 76 transitions. Word has length 16 [2021-06-05 22:48:34,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:34,320 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 76 transitions. [2021-06-05 22:48:34,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:34,321 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 76 transitions. [2021-06-05 22:48:34,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:48:34,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:34,322 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:34,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 22:48:34,322 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:34,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:34,322 INFO L82 PathProgramCache]: Analyzing trace with hash 19790621, now seen corresponding path program 1 times [2021-06-05 22:48:34,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:34,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087073589] [2021-06-05 22:48:34,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:34,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:34,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087073589] [2021-06-05 22:48:34,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087073589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:34,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610805227] [2021-06-05 22:48:34,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:34,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:48:34,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:34,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610805227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:34,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:34,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 22:48:34,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798716845] [2021-06-05 22:48:34,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:48:34,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:34,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:48:34,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:48:34,535 INFO L87 Difference]: Start difference. First operand 43 states and 76 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:34,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:34,556 INFO L93 Difference]: Finished difference Result 96 states and 173 transitions. [2021-06-05 22:48:34,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:48:34,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:48:34,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:34,558 INFO L225 Difference]: With dead ends: 96 [2021-06-05 22:48:34,558 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 22:48:34,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:48:34,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 22:48:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2021-06-05 22:48:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 109 transitions. [2021-06-05 22:48:34,564 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 109 transitions. Word has length 18 [2021-06-05 22:48:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:34,565 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 109 transitions. [2021-06-05 22:48:34,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:34,565 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 109 transitions. [2021-06-05 22:48:34,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:48:34,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:34,566 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:34,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:34,787 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:34,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:34,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1443468059, now seen corresponding path program 2 times [2021-06-05 22:48:34,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:34,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837474035] [2021-06-05 22:48:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:34,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:34,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837474035] [2021-06-05 22:48:34,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837474035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:34,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306476227] [2021-06-05 22:48:34,874 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:34,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:48:34,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:34,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:48:34,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:35,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306476227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:35,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:35,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 22:48:35,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40898717] [2021-06-05 22:48:35,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:48:35,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:35,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:48:35,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:48:35,134 INFO L87 Difference]: Start difference. First operand 58 states and 109 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:35,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:35,516 INFO L93 Difference]: Finished difference Result 173 states and 308 transitions. [2021-06-05 22:48:35,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:48:35,517 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 20 [2021-06-05 22:48:35,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:35,519 INFO L225 Difference]: With dead ends: 173 [2021-06-05 22:48:35,519 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 22:48:35,520 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 308.0ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:48:35,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 22:48:35,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 67. [2021-06-05 22:48:35,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:35,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 129 transitions. [2021-06-05 22:48:35,538 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 129 transitions. Word has length 20 [2021-06-05 22:48:35,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:35,538 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 129 transitions. [2021-06-05 22:48:35,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 129 transitions. [2021-06-05 22:48:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:48:35,539 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:35,539 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:35,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:35,764 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:35,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:35,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1693280397, now seen corresponding path program 3 times [2021-06-05 22:48:35,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:35,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812305314] [2021-06-05 22:48:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:35,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:35,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812305314] [2021-06-05 22:48:35,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812305314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:35,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186622038] [2021-06-05 22:48:35,821 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:35,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:48:35,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:35,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:48:35,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:35,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186622038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:35,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:35,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 22:48:35,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221684607] [2021-06-05 22:48:35,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:48:35,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:35,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:48:35,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:48:35,959 INFO L87 Difference]: Start difference. First operand 67 states and 129 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:36,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:36,273 INFO L93 Difference]: Finished difference Result 145 states and 267 transitions. [2021-06-05 22:48:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:48:36,274 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:48:36,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:36,275 INFO L225 Difference]: With dead ends: 145 [2021-06-05 22:48:36,275 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 22:48:36,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 270.3ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:48:36,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 22:48:36,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 66. [2021-06-05 22:48:36,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2021-06-05 22:48:36,281 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 20 [2021-06-05 22:48:36,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:36,281 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2021-06-05 22:48:36,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:36,281 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2021-06-05 22:48:36,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:48:36,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:36,282 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:36,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:36,497 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:36,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:36,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1024348455, now seen corresponding path program 4 times [2021-06-05 22:48:36,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:36,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508643988] [2021-06-05 22:48:36,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:36,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:36,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508643988] [2021-06-05 22:48:36,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508643988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:36,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897914424] [2021-06-05 22:48:36,545 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:36,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:48:36,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:36,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:48:36,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:36,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897914424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:36,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:36,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:48:36,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95993331] [2021-06-05 22:48:36,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:48:36,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:36,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:48:36,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:48:36,627 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:36,646 INFO L93 Difference]: Finished difference Result 162 states and 309 transitions. [2021-06-05 22:48:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:48:36,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:48:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:36,647 INFO L225 Difference]: With dead ends: 162 [2021-06-05 22:48:36,647 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 22:48:36,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:48:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 22:48:36,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-06-05 22:48:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2021-06-05 22:48:36,653 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 22 [2021-06-05 22:48:36,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:36,653 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2021-06-05 22:48:36,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:36,654 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2021-06-05 22:48:36,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:48:36,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:36,655 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:36,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 22:48:36,877 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:36,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:36,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1876617257, now seen corresponding path program 5 times [2021-06-05 22:48:36,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:36,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086524180] [2021-06-05 22:48:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:36,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:36,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086524180] [2021-06-05 22:48:36,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086524180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:36,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872992915] [2021-06-05 22:48:36,966 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:36,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:48:36,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:36,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:48:37,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:37,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872992915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:37,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:37,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 22:48:37,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518726186] [2021-06-05 22:48:37,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:48:37,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:37,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:48:37,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:48:37,180 INFO L87 Difference]: Start difference. First operand 105 states and 213 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:37,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:37,751 INFO L93 Difference]: Finished difference Result 364 states and 691 transitions. [2021-06-05 22:48:37,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:48:37,752 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:48:37,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:37,753 INFO L225 Difference]: With dead ends: 364 [2021-06-05 22:48:37,754 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 22:48:37,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 484.4ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:48:37,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 22:48:37,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 92. [2021-06-05 22:48:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 179 transitions. [2021-06-05 22:48:37,760 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 179 transitions. Word has length 24 [2021-06-05 22:48:37,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:37,761 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 179 transitions. [2021-06-05 22:48:37,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 179 transitions. [2021-06-05 22:48:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:48:37,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:37,762 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:37,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:37,977 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:37,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:37,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1240439411, now seen corresponding path program 6 times [2021-06-05 22:48:37,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:37,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532729810] [2021-06-05 22:48:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:38,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:38,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532729810] [2021-06-05 22:48:38,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532729810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:38,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802360332] [2021-06-05 22:48:38,043 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:38,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:48:38,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:38,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:48:38,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:38,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802360332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:38,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:38,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 22:48:38,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059631560] [2021-06-05 22:48:38,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:48:38,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:38,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:48:38,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:48:38,233 INFO L87 Difference]: Start difference. First operand 92 states and 179 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:38,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:38,698 INFO L93 Difference]: Finished difference Result 239 states and 453 transitions. [2021-06-05 22:48:38,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:48:38,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:48:38,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:38,700 INFO L225 Difference]: With dead ends: 239 [2021-06-05 22:48:38,700 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 22:48:38,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 434.7ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:48:38,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 22:48:38,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 84. [2021-06-05 22:48:38,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 83 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 164 transitions. [2021-06-05 22:48:38,705 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 164 transitions. Word has length 24 [2021-06-05 22:48:38,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:38,705 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 164 transitions. [2021-06-05 22:48:38,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:38,706 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 164 transitions. [2021-06-05 22:48:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:48:38,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:38,706 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:38,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:38,921 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:38,921 INFO L82 PathProgramCache]: Analyzing trace with hash -465636203, now seen corresponding path program 7 times [2021-06-05 22:48:38,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:38,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760737567] [2021-06-05 22:48:38,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:39,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:39,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760737567] [2021-06-05 22:48:39,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760737567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:39,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302615811] [2021-06-05 22:48:39,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:39,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:48:39,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:39,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302615811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:39,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:39,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:48:39,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144079526] [2021-06-05 22:48:39,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:48:39,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:39,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:48:39,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:48:39,101 INFO L87 Difference]: Start difference. First operand 84 states and 164 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:39,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:39,130 INFO L93 Difference]: Finished difference Result 221 states and 426 transitions. [2021-06-05 22:48:39,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:48:39,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:48:39,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:39,132 INFO L225 Difference]: With dead ends: 221 [2021-06-05 22:48:39,132 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 22:48:39,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:48:39,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 22:48:39,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2021-06-05 22:48:39,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.0833333333333335) internal successors, (300), 144 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 300 transitions. [2021-06-05 22:48:39,138 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 300 transitions. Word has length 26 [2021-06-05 22:48:39,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:39,138 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 300 transitions. [2021-06-05 22:48:39,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 300 transitions. [2021-06-05 22:48:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:48:39,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:39,140 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:39,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 22:48:39,353 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:39,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:39,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1485197677, now seen corresponding path program 8 times [2021-06-05 22:48:39,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:39,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212474505] [2021-06-05 22:48:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:39,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:39,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212474505] [2021-06-05 22:48:39,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212474505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:39,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271744824] [2021-06-05 22:48:39,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:39,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:48:39,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:39,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:48:39,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:39,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271744824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:39,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:39,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 22:48:39,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626678614] [2021-06-05 22:48:39,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:48:39,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:39,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:48:39,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:48:39,706 INFO L87 Difference]: Start difference. First operand 145 states and 300 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:40,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:40,507 INFO L93 Difference]: Finished difference Result 561 states and 1077 transitions. [2021-06-05 22:48:40,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:48:40,507 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:48:40,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:40,510 INFO L225 Difference]: With dead ends: 561 [2021-06-05 22:48:40,510 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 22:48:40,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 673.9ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:48:40,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 22:48:40,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 114. [2021-06-05 22:48:40,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.991150442477876) internal successors, (225), 113 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:40,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 225 transitions. [2021-06-05 22:48:40,517 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 225 transitions. Word has length 28 [2021-06-05 22:48:40,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:40,517 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 225 transitions. [2021-06-05 22:48:40,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:40,517 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 225 transitions. [2021-06-05 22:48:40,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:48:40,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:40,518 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:40,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:40,736 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:40,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1081045901, now seen corresponding path program 9 times [2021-06-05 22:48:40,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:40,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206425896] [2021-06-05 22:48:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:40,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:40,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206425896] [2021-06-05 22:48:40,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206425896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:40,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460447080] [2021-06-05 22:48:40,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:40,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:48:40,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:40,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:48:40,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:41,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460447080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:41,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:41,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 22:48:41,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167639870] [2021-06-05 22:48:41,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:48:41,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:41,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:48:41,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:48:41,029 INFO L87 Difference]: Start difference. First operand 114 states and 225 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:41,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:41,685 INFO L93 Difference]: Finished difference Result 351 states and 677 transitions. [2021-06-05 22:48:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:48:41,685 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:48:41,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:41,687 INFO L225 Difference]: With dead ends: 351 [2021-06-05 22:48:41,687 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 22:48:41,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 613.4ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:48:41,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 22:48:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 102. [2021-06-05 22:48:41,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:41,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-06-05 22:48:41,693 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 28 [2021-06-05 22:48:41,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:41,693 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-06-05 22:48:41,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:41,693 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-06-05 22:48:41,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:48:41,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:41,694 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:41,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:41,901 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:41,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:41,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2026425425, now seen corresponding path program 10 times [2021-06-05 22:48:41,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:41,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727230221] [2021-06-05 22:48:41,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:41,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:41,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727230221] [2021-06-05 22:48:41,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727230221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:41,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754545614] [2021-06-05 22:48:41,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:41,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:48:41,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:41,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:48:41,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:42,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754545614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:42,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:42,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:48:42,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703723054] [2021-06-05 22:48:42,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:48:42,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:42,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:48:42,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:48:42,047 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-06-05 22:48:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:42,085 INFO L93 Difference]: Finished difference Result 280 states and 543 transitions. [2021-06-05 22:48:42,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:48:42,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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 30 [2021-06-05 22:48:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:42,087 INFO L225 Difference]: With dead ends: 280 [2021-06-05 22:48:42,087 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 22:48:42,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:48:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 22:48:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 185. [2021-06-05 22:48:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1032608695652173) internal successors, (387), 184 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 387 transitions. [2021-06-05 22:48:42,093 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 387 transitions. Word has length 30 [2021-06-05 22:48:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:42,093 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 387 transitions. [2021-06-05 22:48:42,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-06-05 22:48:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 387 transitions. [2021-06-05 22:48:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:48:42,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:42,094 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:42,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 22:48:42,309 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:42,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:42,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1274697551, now seen corresponding path program 11 times [2021-06-05 22:48:42,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:42,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785241120] [2021-06-05 22:48:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:42,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:42,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785241120] [2021-06-05 22:48:42,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785241120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:42,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282576488] [2021-06-05 22:48:42,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:42,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:48:42,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:42,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:48:42,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:42,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282576488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:42,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:42,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 22:48:42,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171898123] [2021-06-05 22:48:42,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:48:42,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:42,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:48:42,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:48:42,721 INFO L87 Difference]: Start difference. First operand 185 states and 387 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-06-05 22:48:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:43,938 INFO L93 Difference]: Finished difference Result 786 states and 1519 transitions. [2021-06-05 22:48:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 22:48:43,939 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 32 [2021-06-05 22:48:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:43,941 INFO L225 Difference]: With dead ends: 786 [2021-06-05 22:48:43,941 INFO L226 Difference]: Without dead ends: 678 [2021-06-05 22:48:43,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 1041.6ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 22:48:43,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-05 22:48:43,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 136. [2021-06-05 22:48:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 135 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 271 transitions. [2021-06-05 22:48:43,950 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 271 transitions. Word has length 32 [2021-06-05 22:48:43,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:43,950 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 271 transitions. [2021-06-05 22:48:43,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-06-05 22:48:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 271 transitions. [2021-06-05 22:48:43,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:48:43,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:43,951 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:44,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 22:48:44,175 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:44,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:44,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1086729587, now seen corresponding path program 12 times [2021-06-05 22:48:44,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:44,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137087968] [2021-06-05 22:48:44,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:44,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:44,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137087968] [2021-06-05 22:48:44,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137087968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:44,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902579065] [2021-06-05 22:48:44,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:44,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 22:48:44,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:44,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:48:44,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:44,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902579065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:44,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:44,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-05 22:48:44,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070431016] [2021-06-05 22:48:44,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:48:44,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:44,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:48:44,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:48:44,534 INFO L87 Difference]: Start difference. First operand 136 states and 271 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:45,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:45,524 INFO L93 Difference]: Finished difference Result 485 states and 945 transitions. [2021-06-05 22:48:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:48:45,524 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 32 [2021-06-05 22:48:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:45,526 INFO L225 Difference]: With dead ends: 485 [2021-06-05 22:48:45,526 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 22:48:45,527 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 930.8ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 22:48:45,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 22:48:45,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 120. [2021-06-05 22:48:45,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0168067226890756) internal successors, (240), 119 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 240 transitions. [2021-06-05 22:48:45,532 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 240 transitions. Word has length 32 [2021-06-05 22:48:45,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:45,533 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 240 transitions. [2021-06-05 22:48:45,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:45,533 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 240 transitions. [2021-06-05 22:48:45,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 22:48:45,533 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:45,533 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:45,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 22:48:45,749 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:45,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:45,749 INFO L82 PathProgramCache]: Analyzing trace with hash -4049395, now seen corresponding path program 13 times [2021-06-05 22:48:45,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:45,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167050391] [2021-06-05 22:48:45,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:45,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:45,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167050391] [2021-06-05 22:48:45,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167050391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:45,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155348044] [2021-06-05 22:48:45,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:45,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 22:48:45,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:45,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155348044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:45,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:45,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:48:45,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6305753] [2021-06-05 22:48:45,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:48:45,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:45,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:48:45,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:48:45,928 INFO L87 Difference]: Start difference. First operand 120 states and 240 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:45,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:45,990 INFO L93 Difference]: Finished difference Result 339 states and 660 transitions. [2021-06-05 22:48:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:48:45,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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 34 [2021-06-05 22:48:45,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:45,993 INFO L225 Difference]: With dead ends: 339 [2021-06-05 22:48:45,993 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 22:48:45,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:48:45,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 22:48:46,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 225. [2021-06-05 22:48:46,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.1160714285714284) internal successors, (474), 224 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:46,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 474 transitions. [2021-06-05 22:48:46,002 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 474 transitions. Word has length 34 [2021-06-05 22:48:46,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:46,002 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 474 transitions. [2021-06-05 22:48:46,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 474 transitions. [2021-06-05 22:48:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:48:46,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:46,004 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:46,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:46,217 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:46,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:46,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2031751691, now seen corresponding path program 14 times [2021-06-05 22:48:46,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:46,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29411436] [2021-06-05 22:48:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:46,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:46,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29411436] [2021-06-05 22:48:46,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29411436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:46,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849061547] [2021-06-05 22:48:46,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:46,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:48:46,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:46,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:48:46,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:46,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849061547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:46,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:46,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 22:48:46,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635683720] [2021-06-05 22:48:46,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:48:46,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:46,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:48:46,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:48:46,689 INFO L87 Difference]: Start difference. First operand 225 states and 474 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:48,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:48,302 INFO L93 Difference]: Finished difference Result 1039 states and 2017 transitions. [2021-06-05 22:48:48,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:48:48,303 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:48:48,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:48,306 INFO L225 Difference]: With dead ends: 1039 [2021-06-05 22:48:48,306 INFO L226 Difference]: Without dead ends: 883 [2021-06-05 22:48:48,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 1421.4ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 22:48:48,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-06-05 22:48:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 158. [2021-06-05 22:48:48,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.0191082802547773) internal successors, (317), 157 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:48,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 317 transitions. [2021-06-05 22:48:48,318 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 317 transitions. Word has length 36 [2021-06-05 22:48:48,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:48,319 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 317 transitions. [2021-06-05 22:48:48,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:48,319 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 317 transitions. [2021-06-05 22:48:48,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:48:48,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:48,319 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:48,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 22:48:48,533 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:48,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:48,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1527693965, now seen corresponding path program 15 times [2021-06-05 22:48:48,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:48,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234133028] [2021-06-05 22:48:48,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:48,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:48,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234133028] [2021-06-05 22:48:48,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234133028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:48,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910830351] [2021-06-05 22:48:48,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:48,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 22:48:48,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:48,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:48:48,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:48,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910830351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:48,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:48,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-06-05 22:48:48,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584762767] [2021-06-05 22:48:48,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:48:48,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:48,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:48:48,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:48:48,949 INFO L87 Difference]: Start difference. First operand 158 states and 317 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:50,279 INFO L93 Difference]: Finished difference Result 641 states and 1257 transitions. [2021-06-05 22:48:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 22:48:50,280 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:48:50,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:50,282 INFO L225 Difference]: With dead ends: 641 [2021-06-05 22:48:50,282 INFO L226 Difference]: Without dead ends: 637 [2021-06-05 22:48:50,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 1284.4ms TimeCoverageRelationStatistics Valid=1724, Invalid=5416, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 22:48:50,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-06-05 22:48:50,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 138. [2021-06-05 22:48:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 137 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:50,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 278 transitions. [2021-06-05 22:48:50,290 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 278 transitions. Word has length 36 [2021-06-05 22:48:50,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:50,290 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 278 transitions. [2021-06-05 22:48:50,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 278 transitions. [2021-06-05 22:48:50,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 22:48:50,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:50,291 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:50,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 22:48:50,506 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:50,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:50,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1675506121, now seen corresponding path program 16 times [2021-06-05 22:48:50,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:50,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093097154] [2021-06-05 22:48:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:50,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:50,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093097154] [2021-06-05 22:48:50,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093097154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:50,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959621185] [2021-06-05 22:48:50,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:50,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:48:50,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:50,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:48:50,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:50,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959621185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:50,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:50,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 22:48:50,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568842006] [2021-06-05 22:48:50,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:48:50,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:50,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:48:50,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:48:50,663 INFO L87 Difference]: Start difference. First operand 138 states and 278 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:50,730 INFO L93 Difference]: Finished difference Result 398 states and 777 transitions. [2021-06-05 22:48:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:48:50,730 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 22:48:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:50,731 INFO L225 Difference]: With dead ends: 398 [2021-06-05 22:48:50,731 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 22:48:50,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:48:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 22:48:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2021-06-05 22:48:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.125) internal successors, (561), 264 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 561 transitions. [2021-06-05 22:48:50,737 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 561 transitions. Word has length 38 [2021-06-05 22:48:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:50,737 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 561 transitions. [2021-06-05 22:48:50,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:50,738 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 561 transitions. [2021-06-05 22:48:50,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 22:48:50,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:50,739 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:50,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:50,949 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:50,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:50,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1976295111, now seen corresponding path program 17 times [2021-06-05 22:48:50,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:50,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573220716] [2021-06-05 22:48:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:51,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:51,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573220716] [2021-06-05 22:48:51,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573220716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:51,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922000493] [2021-06-05 22:48:51,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:51,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 22:48:51,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:51,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:48:51,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:51,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922000493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:51,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:51,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 22:48:51,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649366419] [2021-06-05 22:48:51,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 22:48:51,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:51,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 22:48:51,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:48:51,483 INFO L87 Difference]: Start difference. First operand 265 states and 561 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:53,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:53,438 INFO L93 Difference]: Finished difference Result 1320 states and 2571 transitions. [2021-06-05 22:48:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 22:48:53,439 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 22:48:53,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:53,442 INFO L225 Difference]: With dead ends: 1320 [2021-06-05 22:48:53,442 INFO L226 Difference]: Without dead ends: 1110 [2021-06-05 22:48:53,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3798 ImplicationChecksByTransitivity, 1737.3ms TimeCoverageRelationStatistics Valid=3180, Invalid=9030, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 22:48:53,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-05 22:48:53,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 180. [2021-06-05 22:48:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.0279329608938546) internal successors, (363), 179 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:53,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 363 transitions. [2021-06-05 22:48:53,453 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 363 transitions. Word has length 40 [2021-06-05 22:48:53,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:53,454 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 363 transitions. [2021-06-05 22:48:53,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:53,454 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 363 transitions. [2021-06-05 22:48:53,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 22:48:53,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:53,454 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:53,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:53,669 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:53,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:53,669 INFO L82 PathProgramCache]: Analyzing trace with hash -302152819, now seen corresponding path program 18 times [2021-06-05 22:48:53,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:53,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535619934] [2021-06-05 22:48:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:53,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:53,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535619934] [2021-06-05 22:48:53,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535619934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:53,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657140222] [2021-06-05 22:48:53,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:53,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 22:48:53,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:53,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:48:53,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:54,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657140222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:54,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:54,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-06-05 22:48:54,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190168588] [2021-06-05 22:48:54,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:48:54,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:54,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:48:54,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:48:54,122 INFO L87 Difference]: Start difference. First operand 180 states and 363 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:55,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:55,979 INFO L93 Difference]: Finished difference Result 819 states and 1613 transitions. [2021-06-05 22:48:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 22:48:55,980 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 22:48:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:55,982 INFO L225 Difference]: With dead ends: 819 [2021-06-05 22:48:55,982 INFO L226 Difference]: Without dead ends: 815 [2021-06-05 22:48:55,984 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 1721.2ms TimeCoverageRelationStatistics Valid=2606, Invalid=8314, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 22:48:55,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-06-05 22:48:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 156. [2021-06-05 22:48:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.0387096774193547) internal successors, (316), 155 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:55,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 316 transitions. [2021-06-05 22:48:55,990 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 316 transitions. Word has length 40 [2021-06-05 22:48:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:55,991 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 316 transitions. [2021-06-05 22:48:55,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:55,991 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 316 transitions. [2021-06-05 22:48:55,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 22:48:55,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:55,991 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:56,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:56,205 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:56,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:56,205 INFO L82 PathProgramCache]: Analyzing trace with hash -78659707, now seen corresponding path program 19 times [2021-06-05 22:48:56,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:56,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875042157] [2021-06-05 22:48:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:56,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:56,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875042157] [2021-06-05 22:48:56,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875042157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:56,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730061650] [2021-06-05 22:48:56,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:56,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:48:56,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:56,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730061650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:56,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:56,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:48:56,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723951352] [2021-06-05 22:48:56,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:48:56,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:56,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:48:56,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:48:56,425 INFO L87 Difference]: Start difference. First operand 156 states and 316 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:56,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:56,523 INFO L93 Difference]: Finished difference Result 457 states and 894 transitions. [2021-06-05 22:48:56,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:48:56,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 22:48:56,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:56,525 INFO L225 Difference]: With dead ends: 457 [2021-06-05 22:48:56,525 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 22:48:56,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:48:56,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 22:48:56,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 305. [2021-06-05 22:48:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.1315789473684212) internal successors, (648), 304 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 648 transitions. [2021-06-05 22:48:56,532 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 648 transitions. Word has length 42 [2021-06-05 22:48:56,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:56,532 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 648 transitions. [2021-06-05 22:48:56,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:56,533 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 648 transitions. [2021-06-05 22:48:56,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 22:48:56,533 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:56,533 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:56,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 22:48:56,757 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:56,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:56,757 INFO L82 PathProgramCache]: Analyzing trace with hash -729629309, now seen corresponding path program 20 times [2021-06-05 22:48:56,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:56,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768467964] [2021-06-05 22:48:56,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:56,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:56,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768467964] [2021-06-05 22:48:56,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768467964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:56,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710114106] [2021-06-05 22:48:56,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:57,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:48:57,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:57,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:48:57,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:57,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710114106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:57,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:57,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 22:48:57,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651430285] [2021-06-05 22:48:57,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 22:48:57,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:57,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 22:48:57,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:48:57,415 INFO L87 Difference]: Start difference. First operand 305 states and 648 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:00,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:00,030 INFO L93 Difference]: Finished difference Result 1629 states and 3181 transitions. [2021-06-05 22:49:00,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 22:49:00,030 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 22:49:00,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:00,034 INFO L225 Difference]: With dead ends: 1629 [2021-06-05 22:49:00,034 INFO L226 Difference]: Without dead ends: 1359 [2021-06-05 22:49:00,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5875 ImplicationChecksByTransitivity, 2408.1ms TimeCoverageRelationStatistics Valid=4657, Invalid=13165, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 22:49:00,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-05 22:49:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 202. [2021-06-05 22:49:00,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0348258706467663) internal successors, (409), 201 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 409 transitions. [2021-06-05 22:49:00,046 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 409 transitions. Word has length 44 [2021-06-05 22:49:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:00,046 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 409 transitions. [2021-06-05 22:49:00,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 409 transitions. [2021-06-05 22:49:00,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 22:49:00,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:00,047 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:00,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 22:49:00,270 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:00,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:00,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1199920525, now seen corresponding path program 21 times [2021-06-05 22:49:00,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:00,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229303758] [2021-06-05 22:49:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:00,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:00,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229303758] [2021-06-05 22:49:00,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229303758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:00,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186668668] [2021-06-05 22:49:00,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:00,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 22:49:00,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:49:00,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:49:00,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:00,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186668668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:00,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:00,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-06-05 22:49:00,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066577288] [2021-06-05 22:49:00,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 22:49:00,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:00,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 22:49:00,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:49:00,794 INFO L87 Difference]: Start difference. First operand 202 states and 409 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:03,184 INFO L93 Difference]: Finished difference Result 1019 states and 2013 transitions. [2021-06-05 22:49:03,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 22:49:03,185 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 22:49:03,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:03,188 INFO L225 Difference]: With dead ends: 1019 [2021-06-05 22:49:03,188 INFO L226 Difference]: Without dead ends: 1015 [2021-06-05 22:49:03,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5830 ImplicationChecksByTransitivity, 2253.3ms TimeCoverageRelationStatistics Valid=3791, Invalid=12211, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 22:49:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2021-06-05 22:49:03,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 174. [2021-06-05 22:49:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.046242774566474) internal successors, (354), 173 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 354 transitions. [2021-06-05 22:49:03,196 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 354 transitions. Word has length 44 [2021-06-05 22:49:03,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:03,196 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 354 transitions. [2021-06-05 22:49:03,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 354 transitions. [2021-06-05 22:49:03,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 22:49:03,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:03,197 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:03,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:03,413 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:03,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2016813247, now seen corresponding path program 22 times [2021-06-05 22:49:03,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:03,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361450166] [2021-06-05 22:49:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:03,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:03,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361450166] [2021-06-05 22:49:03,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361450166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:03,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601847928] [2021-06-05 22:49:03,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:03,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:49:03,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:49:03,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:49:03,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:03,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601847928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:03,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:03,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 22:49:03,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019145750] [2021-06-05 22:49:03,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:49:03,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:03,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:49:03,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:49:03,640 INFO L87 Difference]: Start difference. First operand 174 states and 354 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:03,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:03,745 INFO L93 Difference]: Finished difference Result 516 states and 1011 transitions. [2021-06-05 22:49:03,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:49:03,746 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 22:49:03,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:03,747 INFO L225 Difference]: With dead ends: 516 [2021-06-05 22:49:03,747 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 22:49:03,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:49:03,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 22:49:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 345. [2021-06-05 22:49:03,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.136627906976744) internal successors, (735), 344 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 735 transitions. [2021-06-05 22:49:03,753 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 735 transitions. Word has length 46 [2021-06-05 22:49:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:03,753 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 735 transitions. [2021-06-05 22:49:03,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:03,753 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 735 transitions. [2021-06-05 22:49:03,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 22:49:03,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:03,754 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:03,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 22:49:03,969 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:03,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:03,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1932635711, now seen corresponding path program 23 times [2021-06-05 22:49:03,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:03,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709752005] [2021-06-05 22:49:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:04,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:04,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709752005] [2021-06-05 22:49:04,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709752005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:04,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699368364] [2021-06-05 22:49:04,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:04,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 22:49:04,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:49:04,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:49:04,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:04,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699368364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:04,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:04,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-06-05 22:49:04,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428033902] [2021-06-05 22:49:04,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 22:49:04,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:04,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 22:49:04,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:49:04,728 INFO L87 Difference]: Start difference. First operand 345 states and 735 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:08,075 INFO L93 Difference]: Finished difference Result 1966 states and 3847 transitions. [2021-06-05 22:49:08,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-06-05 22:49:08,076 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 22:49:08,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:08,080 INFO L225 Difference]: With dead ends: 1966 [2021-06-05 22:49:08,080 INFO L226 Difference]: Without dead ends: 1630 [2021-06-05 22:49:08,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8718 ImplicationChecksByTransitivity, 2994.4ms TimeCoverageRelationStatistics Valid=6597, Invalid=18525, Unknown=0, NotChecked=0, Total=25122 [2021-06-05 22:49:08,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-06-05 22:49:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 224. [2021-06-05 22:49:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0403587443946187) internal successors, (455), 223 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 455 transitions. [2021-06-05 22:49:08,103 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 455 transitions. Word has length 48 [2021-06-05 22:49:08,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:08,103 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 455 transitions. [2021-06-05 22:49:08,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:08,104 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 455 transitions. [2021-06-05 22:49:08,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 22:49:08,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:08,104 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:08,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:08,321 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:08,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:08,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1888843917, now seen corresponding path program 24 times [2021-06-05 22:49:08,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:08,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848123971] [2021-06-05 22:49:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:08,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:08,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848123971] [2021-06-05 22:49:08,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848123971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:08,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267747905] [2021-06-05 22:49:08,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:08,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 22:49:08,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:49:08,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:49:08,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:08,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267747905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:08,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:08,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-06-05 22:49:08,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919632774] [2021-06-05 22:49:08,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 22:49:08,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:08,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 22:49:08,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:49:08,886 INFO L87 Difference]: Start difference. First operand 224 states and 455 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:11,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:11,831 INFO L93 Difference]: Finished difference Result 1241 states and 2457 transitions. [2021-06-05 22:49:11,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-06-05 22:49:11,832 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 22:49:11,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:11,834 INFO L225 Difference]: With dead ends: 1241 [2021-06-05 22:49:11,834 INFO L226 Difference]: Without dead ends: 1237 [2021-06-05 22:49:11,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8653 ImplicationChecksByTransitivity, 2731.8ms TimeCoverageRelationStatistics Valid=5342, Invalid=17308, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 22:49:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-06-05 22:49:11,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 192. [2021-06-05 22:49:11,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.0523560209424083) internal successors, (392), 191 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:11,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 392 transitions. [2021-06-05 22:49:11,843 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 392 transitions. Word has length 48 [2021-06-05 22:49:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:11,843 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 392 transitions. [2021-06-05 22:49:11,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:11,843 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 392 transitions. [2021-06-05 22:49:11,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 22:49:11,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:11,844 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:12,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 22:49:12,057 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:12,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:12,057 INFO L82 PathProgramCache]: Analyzing trace with hash 914329853, now seen corresponding path program 25 times [2021-06-05 22:49:12,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:12,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793363759] [2021-06-05 22:49:12,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:12,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:12,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793363759] [2021-06-05 22:49:12,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793363759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:12,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304104691] [2021-06-05 22:49:12,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:12,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:49:12,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:12,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304104691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:12,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:12,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 22:49:12,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253323468] [2021-06-05 22:49:12,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:49:12,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:12,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:49:12,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:49:12,285 INFO L87 Difference]: Start difference. First operand 192 states and 392 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:12,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:12,408 INFO L93 Difference]: Finished difference Result 575 states and 1128 transitions. [2021-06-05 22:49:12,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:49:12,409 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 22:49:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:12,410 INFO L225 Difference]: With dead ends: 575 [2021-06-05 22:49:12,410 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 22:49:12,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:49:12,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 22:49:12,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 385. [2021-06-05 22:49:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.140625) internal successors, (822), 384 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) [2021-06-05 22:49:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 822 transitions. [2021-06-05 22:49:12,416 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 822 transitions. Word has length 50 [2021-06-05 22:49:12,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:12,416 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 822 transitions. [2021-06-05 22:49:12,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:12,416 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 822 transitions. [2021-06-05 22:49:12,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 22:49:12,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:12,417 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:12,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 22:49:12,640 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:12,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:12,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2068558075, now seen corresponding path program 26 times [2021-06-05 22:49:12,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:12,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167732833] [2021-06-05 22:49:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:12,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:12,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167732833] [2021-06-05 22:49:12,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167732833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:12,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607645530] [2021-06-05 22:49:12,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:12,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:49:12,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:49:12,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 22:49:12,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:13,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607645530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:13,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:13,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-06-05 22:49:13,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169941485] [2021-06-05 22:49:13,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 22:49:13,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:13,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 22:49:13,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:49:13,453 INFO L87 Difference]: Start difference. First operand 385 states and 822 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:17,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:17,578 INFO L93 Difference]: Finished difference Result 2331 states and 4569 transitions. [2021-06-05 22:49:17,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-06-05 22:49:17,578 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 22:49:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:17,583 INFO L225 Difference]: With dead ends: 2331 [2021-06-05 22:49:17,583 INFO L226 Difference]: Without dead ends: 1923 [2021-06-05 22:49:17,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12499 ImplicationChecksByTransitivity, 3791.4ms TimeCoverageRelationStatistics Valid=9089, Invalid=25321, Unknown=0, NotChecked=0, Total=34410 [2021-06-05 22:49:17,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-06-05 22:49:17,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 246. [2021-06-05 22:49:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0448979591836736) internal successors, (501), 245 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 501 transitions. [2021-06-05 22:49:17,594 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 501 transitions. Word has length 52 [2021-06-05 22:49:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:17,594 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 501 transitions. [2021-06-05 22:49:17,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:17,594 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 501 transitions. [2021-06-05 22:49:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 22:49:17,595 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:17,595 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:17,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 22:49:17,808 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:17,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:17,808 INFO L82 PathProgramCache]: Analyzing trace with hash -275960691, now seen corresponding path program 27 times [2021-06-05 22:49:17,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:17,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110554658] [2021-06-05 22:49:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:17,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:17,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110554658] [2021-06-05 22:49:17,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110554658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:17,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063676415] [2021-06-05 22:49:17,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:17,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 22:49:17,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:49:18,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 22:49:18,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:18,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063676415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:18,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:18,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-06-05 22:49:18,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616016982] [2021-06-05 22:49:18,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 22:49:18,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:18,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 22:49:18,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:49:18,501 INFO L87 Difference]: Start difference. First operand 246 states and 501 transitions. Second operand has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:22,221 INFO L93 Difference]: Finished difference Result 1485 states and 2945 transitions. [2021-06-05 22:49:22,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-05 22:49:22,221 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 22:49:22,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:22,225 INFO L225 Difference]: With dead ends: 1485 [2021-06-05 22:49:22,225 INFO L226 Difference]: Without dead ends: 1481 [2021-06-05 22:49:22,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12396 ImplicationChecksByTransitivity, 3513.2ms TimeCoverageRelationStatistics Valid=7328, Invalid=23824, Unknown=0, NotChecked=0, Total=31152 [2021-06-05 22:49:22,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-06-05 22:49:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 210. [2021-06-05 22:49:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0574162679425836) internal successors, (430), 209 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 430 transitions. [2021-06-05 22:49:22,232 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 430 transitions. Word has length 52 [2021-06-05 22:49:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:22,233 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 430 transitions. [2021-06-05 22:49:22,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 430 transitions. [2021-06-05 22:49:22,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 22:49:22,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:22,234 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:22,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:22,439 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:22,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:22,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1608264519, now seen corresponding path program 28 times [2021-06-05 22:49:22,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:22,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604993050] [2021-06-05 22:49:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:22,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:22,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604993050] [2021-06-05 22:49:22,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604993050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:22,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496329496] [2021-06-05 22:49:22,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:22,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:49:22,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:49:22,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:49:22,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:22,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496329496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:22,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:22,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 22:49:22,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69698305] [2021-06-05 22:49:22,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:49:22,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:22,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:49:22,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:49:22,694 INFO L87 Difference]: Start difference. First operand 210 states and 430 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:22,835 INFO L93 Difference]: Finished difference Result 634 states and 1245 transitions. [2021-06-05 22:49:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:49:22,835 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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 54 [2021-06-05 22:49:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:22,836 INFO L225 Difference]: With dead ends: 634 [2021-06-05 22:49:22,836 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 22:49:22,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:49:22,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 22:49:22,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 425. [2021-06-05 22:49:22,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.143867924528302) internal successors, (909), 424 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:22,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 909 transitions. [2021-06-05 22:49:22,843 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 909 transitions. Word has length 54 [2021-06-05 22:49:22,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:22,843 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 909 transitions. [2021-06-05 22:49:22,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:22,843 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 909 transitions. [2021-06-05 22:49:22,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:49:22,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:22,844 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:23,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 22:49:23,057 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:23,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:23,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1640220087, now seen corresponding path program 29 times [2021-06-05 22:49:23,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:23,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142891849] [2021-06-05 22:49:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:23,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:23,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142891849] [2021-06-05 22:49:23,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142891849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:23,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035017273] [2021-06-05 22:49:23,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:23,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 22:49:23,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:49:23,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:49:23,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:24,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035017273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:24,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:24,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-06-05 22:49:24,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838014462] [2021-06-05 22:49:24,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 22:49:24,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:24,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 22:49:24,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:49:24,032 INFO L87 Difference]: Start difference. First operand 425 states and 909 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:29,238 INFO L93 Difference]: Finished difference Result 2724 states and 5347 transitions. [2021-06-05 22:49:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-06-05 22:49:29,238 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 22:49:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:29,245 INFO L225 Difference]: With dead ends: 2724 [2021-06-05 22:49:29,245 INFO L226 Difference]: Without dead ends: 2238 [2021-06-05 22:49:29,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17409 ImplicationChecksByTransitivity, 4725.3ms TimeCoverageRelationStatistics Valid=12230, Invalid=33780, Unknown=0, NotChecked=0, Total=46010 [2021-06-05 22:49:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-06-05 22:49:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 268. [2021-06-05 22:49:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.048689138576779) internal successors, (547), 267 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 547 transitions. [2021-06-05 22:49:29,258 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 547 transitions. Word has length 56 [2021-06-05 22:49:29,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:29,258 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 547 transitions. [2021-06-05 22:49:29,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:29,258 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 547 transitions. [2021-06-05 22:49:29,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 22:49:29,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:29,259 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:29,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:29,482 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:29,482 INFO L82 PathProgramCache]: Analyzing trace with hash 205238669, now seen corresponding path program 30 times [2021-06-05 22:49:29,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:29,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519472960] [2021-06-05 22:49:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:29,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:29,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519472960] [2021-06-05 22:49:29,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519472960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:29,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648061956] [2021-06-05 22:49:29,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:29,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 22:49:29,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:49:29,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:49:29,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:30,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648061956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:30,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:30,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 38 [2021-06-05 22:49:30,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826574604] [2021-06-05 22:49:30,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:49:30,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:30,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:49:30,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:49:30,260 INFO L87 Difference]: Start difference. First operand 268 states and 547 transitions. Second operand has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:34,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:34,767 INFO L93 Difference]: Finished difference Result 1751 states and 3477 transitions. [2021-06-05 22:49:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-06-05 22:49:34,768 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 22:49:34,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:34,771 INFO L225 Difference]: With dead ends: 1751 [2021-06-05 22:49:34,772 INFO L226 Difference]: Without dead ends: 1747 [2021-06-05 22:49:34,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17241 ImplicationChecksByTransitivity, 4309.0ms TimeCoverageRelationStatistics Valid=9824, Invalid=31996, Unknown=0, NotChecked=0, Total=41820 [2021-06-05 22:49:34,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-06-05 22:49:34,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 228. [2021-06-05 22:49:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0616740088105727) internal successors, (468), 227 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 468 transitions. [2021-06-05 22:49:34,783 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 468 transitions. Word has length 56 [2021-06-05 22:49:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:34,784 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 468 transitions. [2021-06-05 22:49:34,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 468 transitions. [2021-06-05 22:49:34,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 22:49:34,785 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:34,785 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:35,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 22:49:35,009 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:35,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:35,009 INFO L82 PathProgramCache]: Analyzing trace with hash -924210571, now seen corresponding path program 31 times [2021-06-05 22:49:35,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:35,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172756385] [2021-06-05 22:49:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:35,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:35,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172756385] [2021-06-05 22:49:35,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172756385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:35,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857608994] [2021-06-05 22:49:35,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:35,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:49:35,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:35,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857608994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:35,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:35,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 22:49:35,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89154199] [2021-06-05 22:49:35,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:49:35,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:35,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:49:35,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:49:35,271 INFO L87 Difference]: Start difference. First operand 228 states and 468 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 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) [2021-06-05 22:49:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:35,459 INFO L93 Difference]: Finished difference Result 693 states and 1362 transitions. [2021-06-05 22:49:35,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:49:35,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 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 58 [2021-06-05 22:49:35,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:35,461 INFO L225 Difference]: With dead ends: 693 [2021-06-05 22:49:35,461 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 22:49:35,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:49:35,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 22:49:35,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 465. [2021-06-05 22:49:35,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.146551724137931) internal successors, (996), 464 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 996 transitions. [2021-06-05 22:49:35,468 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 996 transitions. Word has length 58 [2021-06-05 22:49:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:35,468 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 996 transitions. [2021-06-05 22:49:35,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 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) [2021-06-05 22:49:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 996 transitions. [2021-06-05 22:49:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 22:49:35,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:35,469 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:35,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 22:49:35,685 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:35,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:35,685 INFO L82 PathProgramCache]: Analyzing trace with hash -418583437, now seen corresponding path program 32 times [2021-06-05 22:49:35,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:35,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552596555] [2021-06-05 22:49:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:35,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:35,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552596555] [2021-06-05 22:49:35,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552596555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:35,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610771951] [2021-06-05 22:49:35,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:36,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:49:36,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:49:36,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:49:36,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:36,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610771951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:36,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:36,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-06-05 22:49:36,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653809787] [2021-06-05 22:49:36,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 22:49:36,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:36,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 22:49:36,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:49:36,747 INFO L87 Difference]: Start difference. First operand 465 states and 996 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:43,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:43,131 INFO L93 Difference]: Finished difference Result 3145 states and 6181 transitions. [2021-06-05 22:49:43,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-06-05 22:49:43,131 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 22:49:43,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:43,134 INFO L225 Difference]: With dead ends: 3145 [2021-06-05 22:49:43,134 INFO L226 Difference]: Without dead ends: 2575 [2021-06-05 22:49:43,136 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23656 ImplicationChecksByTransitivity, 5793.2ms TimeCoverageRelationStatistics Valid=16125, Invalid=44145, Unknown=0, NotChecked=0, Total=60270 [2021-06-05 22:49:43,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2021-06-05 22:49:43,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 290. [2021-06-05 22:49:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.0519031141868513) internal successors, (593), 289 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:43,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 593 transitions. [2021-06-05 22:49:43,145 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 593 transitions. Word has length 60 [2021-06-05 22:49:43,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:43,146 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 593 transitions. [2021-06-05 22:49:43,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:43,146 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 593 transitions. [2021-06-05 22:49:43,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 22:49:43,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:43,146 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:43,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 22:49:43,361 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:43,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:43,361 INFO L82 PathProgramCache]: Analyzing trace with hash 333465485, now seen corresponding path program 33 times [2021-06-05 22:49:43,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:43,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215001092] [2021-06-05 22:49:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:43,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:43,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215001092] [2021-06-05 22:49:43,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215001092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:43,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047515594] [2021-06-05 22:49:43,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:43,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 22:49:43,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:49:43,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:49:43,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:44,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047515594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:44,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:44,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 41 [2021-06-05 22:49:44,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070605204] [2021-06-05 22:49:44,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 22:49:44,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:44,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 22:49:44,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:49:44,212 INFO L87 Difference]: Start difference. First operand 290 states and 593 transitions. Second operand has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:49,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:49,742 INFO L93 Difference]: Finished difference Result 2039 states and 4053 transitions. [2021-06-05 22:49:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-06-05 22:49:49,743 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 22:49:49,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:49,746 INFO L225 Difference]: With dead ends: 2039 [2021-06-05 22:49:49,746 INFO L226 Difference]: Without dead ends: 2035 [2021-06-05 22:49:49,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23386 ImplicationChecksByTransitivity, 5239.5ms TimeCoverageRelationStatistics Valid=12911, Invalid=42079, Unknown=0, NotChecked=0, Total=54990 [2021-06-05 22:49:49,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-06-05 22:49:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 246. [2021-06-05 22:49:49,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0653061224489795) internal successors, (506), 245 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:49,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 506 transitions. [2021-06-05 22:49:49,755 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 506 transitions. Word has length 60 [2021-06-05 22:49:49,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:49,755 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 506 transitions. [2021-06-05 22:49:49,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:49,755 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 506 transitions. [2021-06-05 22:49:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 22:49:49,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:49,756 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:49,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 22:49:49,956 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:49,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:49,957 INFO L82 PathProgramCache]: Analyzing trace with hash 545526321, now seen corresponding path program 34 times [2021-06-05 22:49:49,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:49,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737066374] [2021-06-05 22:49:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:50,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:50,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737066374] [2021-06-05 22:49:50,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737066374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:50,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643968564] [2021-06-05 22:49:50,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:50,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:49:50,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:49:50,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:49:50,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:50,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643968564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:50,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:50,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 22:49:50,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053558732] [2021-06-05 22:49:50,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:49:50,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:50,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:49:50,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:49:50,249 INFO L87 Difference]: Start difference. First operand 246 states and 506 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:50,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:50,472 INFO L93 Difference]: Finished difference Result 752 states and 1479 transitions. [2021-06-05 22:49:50,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:49:50,472 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 22:49:50,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:50,474 INFO L225 Difference]: With dead ends: 752 [2021-06-05 22:49:50,474 INFO L226 Difference]: Without dead ends: 665 [2021-06-05 22:49:50,474 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:49:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-05 22:49:50,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 505. [2021-06-05 22:49:50,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1488095238095237) internal successors, (1083), 504 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:50,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1083 transitions. [2021-06-05 22:49:50,482 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1083 transitions. Word has length 62 [2021-06-05 22:49:50,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:50,482 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1083 transitions. [2021-06-05 22:49:50,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1083 transitions. [2021-06-05 22:49:50,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-06-05 22:49:50,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:50,484 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:50,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 22:49:50,697 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:50,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:50,697 INFO L82 PathProgramCache]: Analyzing trace with hash 387589423, now seen corresponding path program 35 times [2021-06-05 22:49:50,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:50,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486258641] [2021-06-05 22:49:50,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:51,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:51,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486258641] [2021-06-05 22:49:51,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486258641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:51,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517639649] [2021-06-05 22:49:51,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:51,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 22:49:51,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:49:51,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:49:51,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:51,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517639649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:51,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:51,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-06-05 22:49:51,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427550204] [2021-06-05 22:49:51,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-06-05 22:49:51,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:51,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-06-05 22:49:51,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2723, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:49:51,842 INFO L87 Difference]: Start difference. First operand 505 states and 1083 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:59,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:59,682 INFO L93 Difference]: Finished difference Result 3594 states and 7071 transitions. [2021-06-05 22:49:59,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-06-05 22:49:59,683 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-06-05 22:49:59,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:59,688 INFO L225 Difference]: With dead ends: 3594 [2021-06-05 22:49:59,688 INFO L226 Difference]: Without dead ends: 2934 [2021-06-05 22:49:59,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31467 ImplicationChecksByTransitivity, 6947.2ms TimeCoverageRelationStatistics Valid=20887, Invalid=56675, Unknown=0, NotChecked=0, Total=77562 [2021-06-05 22:49:59,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-06-05 22:49:59,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 312. [2021-06-05 22:49:59,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.054662379421222) internal successors, (639), 311 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:59,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 639 transitions. [2021-06-05 22:49:59,702 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 639 transitions. Word has length 64 [2021-06-05 22:49:59,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:59,702 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 639 transitions. [2021-06-05 22:49:59,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:59,702 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 639 transitions. [2021-06-05 22:49:59,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-06-05 22:49:59,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:59,703 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:59,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 22:49:59,905 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:59,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:59,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1658179955, now seen corresponding path program 36 times [2021-06-05 22:49:59,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:59,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841924440] [2021-06-05 22:49:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:00,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:00,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841924440] [2021-06-05 22:50:00,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841924440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:00,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029768475] [2021-06-05 22:50:00,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:00,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 22:50:00,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:00,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:50:00,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:00,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029768475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:00,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:00,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2021-06-05 22:50:00,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917655595] [2021-06-05 22:50:00,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 22:50:00,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:00,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 22:50:00,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:50:00,810 INFO L87 Difference]: Start difference. First operand 312 states and 639 transitions. Second operand has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:07,478 INFO L93 Difference]: Finished difference Result 2349 states and 4673 transitions. [2021-06-05 22:50:07,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-06-05 22:50:07,478 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-06-05 22:50:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:07,481 INFO L225 Difference]: With dead ends: 2349 [2021-06-05 22:50:07,481 INFO L226 Difference]: Without dead ends: 2345 [2021-06-05 22:50:07,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31046 ImplicationChecksByTransitivity, 6389.1ms TimeCoverageRelationStatistics Valid=16676, Invalid=54346, Unknown=0, NotChecked=0, Total=71022 [2021-06-05 22:50:07,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-06-05 22:50:07,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 264. [2021-06-05 22:50:07,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.068441064638783) internal successors, (544), 263 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 544 transitions. [2021-06-05 22:50:07,492 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 544 transitions. Word has length 64 [2021-06-05 22:50:07,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:07,492 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 544 transitions. [2021-06-05 22:50:07,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:07,492 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 544 transitions. [2021-06-05 22:50:07,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 22:50:07,493 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:07,493 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:07,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 22:50:07,695 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:07,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:07,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2111435795, now seen corresponding path program 37 times [2021-06-05 22:50:07,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:07,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013358150] [2021-06-05 22:50:07,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:07,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:07,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013358150] [2021-06-05 22:50:07,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013358150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:07,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620460384] [2021-06-05 22:50:07,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:07,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 22:50:07,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:08,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620460384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:08,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:08,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 22:50:08,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44613393] [2021-06-05 22:50:08,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:50:08,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:08,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:50:08,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:50:08,016 INFO L87 Difference]: Start difference. First operand 264 states and 544 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:08,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:08,276 INFO L93 Difference]: Finished difference Result 811 states and 1596 transitions. [2021-06-05 22:50:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:50:08,276 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 22:50:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:08,278 INFO L225 Difference]: With dead ends: 811 [2021-06-05 22:50:08,278 INFO L226 Difference]: Without dead ends: 718 [2021-06-05 22:50:08,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:50:08,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-06-05 22:50:08,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 545. [2021-06-05 22:50:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.150735294117647) internal successors, (1170), 544 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1170 transitions. [2021-06-05 22:50:08,286 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1170 transitions. Word has length 66 [2021-06-05 22:50:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:08,286 INFO L482 AbstractCegarLoop]: Abstraction has 545 states and 1170 transitions. [2021-06-05 22:50:08,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1170 transitions. [2021-06-05 22:50:08,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-06-05 22:50:08,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:08,287 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:08,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 22:50:08,512 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:08,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1230925803, now seen corresponding path program 38 times [2021-06-05 22:50:08,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:08,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966863913] [2021-06-05 22:50:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:08,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:08,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966863913] [2021-06-05 22:50:08,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966863913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:08,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830020] [2021-06-05 22:50:08,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:09,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:50:09,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:09,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:50:09,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:09,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:09,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:09,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-06-05 22:50:09,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362458980] [2021-06-05 22:50:09,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-06-05 22:50:09,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:09,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-06-05 22:50:09,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3120, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:50:09,861 INFO L87 Difference]: Start difference. First operand 545 states and 1170 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:19,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:19,363 INFO L93 Difference]: Finished difference Result 4071 states and 8017 transitions. [2021-06-05 22:50:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2021-06-05 22:50:19,364 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-06-05 22:50:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:19,371 INFO L225 Difference]: With dead ends: 4071 [2021-06-05 22:50:19,371 INFO L226 Difference]: Without dead ends: 3315 [2021-06-05 22:50:19,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41086 ImplicationChecksByTransitivity, 8449.7ms TimeCoverageRelationStatistics Valid=26637, Invalid=71645, Unknown=0, NotChecked=0, Total=98282 [2021-06-05 22:50:19,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-06-05 22:50:19,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 334. [2021-06-05 22:50:19,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.057057057057057) internal successors, (685), 333 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 685 transitions. [2021-06-05 22:50:19,393 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 685 transitions. Word has length 68 [2021-06-05 22:50:19,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:19,394 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 685 transitions. [2021-06-05 22:50:19,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:19,394 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 685 transitions. [2021-06-05 22:50:19,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-06-05 22:50:19,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:19,395 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:19,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:19,613 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:19,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:19,613 INFO L82 PathProgramCache]: Analyzing trace with hash -868702579, now seen corresponding path program 39 times [2021-06-05 22:50:19,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:19,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374707485] [2021-06-05 22:50:19,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:19,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:19,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374707485] [2021-06-05 22:50:19,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374707485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:19,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096630230] [2021-06-05 22:50:19,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:19,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 22:50:19,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:19,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:50:19,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:20,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096630230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:20,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:20,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 47 [2021-06-05 22:50:20,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211033276] [2021-06-05 22:50:20,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 22:50:20,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:20,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 22:50:20,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1804, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:50:20,613 INFO L87 Difference]: Start difference. First operand 334 states and 685 transitions. Second operand has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:28,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:28,346 INFO L93 Difference]: Finished difference Result 2681 states and 5337 transitions. [2021-06-05 22:50:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-06-05 22:50:28,346 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-06-05 22:50:28,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:28,351 INFO L225 Difference]: With dead ends: 2681 [2021-06-05 22:50:28,351 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 22:50:28,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40452 ImplicationChecksByTransitivity, 7442.4ms TimeCoverageRelationStatistics Valid=21212, Invalid=69088, Unknown=0, NotChecked=0, Total=90300 [2021-06-05 22:50:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 22:50:28,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 282. [2021-06-05 22:50:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.0711743772241995) internal successors, (582), 281 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:28,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 582 transitions. [2021-06-05 22:50:28,370 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 582 transitions. Word has length 68 [2021-06-05 22:50:28,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:28,370 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 582 transitions. [2021-06-05 22:50:28,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:28,370 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 582 transitions. [2021-06-05 22:50:28,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 22:50:28,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:28,371 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:28,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:28,595 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:28,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:28,595 INFO L82 PathProgramCache]: Analyzing trace with hash 880973737, now seen corresponding path program 40 times [2021-06-05 22:50:28,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:28,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266326545] [2021-06-05 22:50:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:28,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:28,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266326545] [2021-06-05 22:50:28,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266326545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:28,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678257256] [2021-06-05 22:50:28,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:28,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:50:28,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:28,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 22:50:28,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:28,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678257256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:28,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:28,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 22:50:28,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844707320] [2021-06-05 22:50:28,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:50:28,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:28,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:50:28,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:50:28,937 INFO L87 Difference]: Start difference. First operand 282 states and 582 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:29,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:29,212 INFO L93 Difference]: Finished difference Result 870 states and 1713 transitions. [2021-06-05 22:50:29,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:50:29,213 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 22:50:29,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:29,214 INFO L225 Difference]: With dead ends: 870 [2021-06-05 22:50:29,214 INFO L226 Difference]: Without dead ends: 771 [2021-06-05 22:50:29,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:50:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-06-05 22:50:29,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 585. [2021-06-05 22:50:29,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1523972602739727) internal successors, (1257), 584 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1257 transitions. [2021-06-05 22:50:29,223 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1257 transitions. Word has length 70 [2021-06-05 22:50:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:29,224 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1257 transitions. [2021-06-05 22:50:29,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:29,225 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1257 transitions. [2021-06-05 22:50:29,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-06-05 22:50:29,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:29,225 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:29,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 22:50:29,447 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:29,447 INFO L82 PathProgramCache]: Analyzing trace with hash 550292647, now seen corresponding path program 41 times [2021-06-05 22:50:29,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:29,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22314547] [2021-06-05 22:50:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:29,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:29,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22314547] [2021-06-05 22:50:29,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22314547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:29,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942757724] [2021-06-05 22:50:29,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:29,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 22:50:29,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:29,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:50:29,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:30,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942757724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:30,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:30,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-06-05 22:50:30,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951447985] [2021-06-05 22:50:30,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-06-05 22:50:30,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:30,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-06-05 22:50:30,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 22:50:30,845 INFO L87 Difference]: Start difference. First operand 585 states and 1257 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 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) [2021-06-05 22:50:42,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:42,315 INFO L93 Difference]: Finished difference Result 4576 states and 9019 transitions. [2021-06-05 22:50:42,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2021-06-05 22:50:42,317 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 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) Word has length 72 [2021-06-05 22:50:42,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:42,322 INFO L225 Difference]: With dead ends: 4576 [2021-06-05 22:50:42,322 INFO L226 Difference]: Without dead ends: 3718 [2021-06-05 22:50:42,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52776 ImplicationChecksByTransitivity, 9925.8ms TimeCoverageRelationStatistics Valid=33504, Invalid=89346, Unknown=0, NotChecked=0, Total=122850 [2021-06-05 22:50:42,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-06-05 22:50:42,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 356. [2021-06-05 22:50:42,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.0591549295774647) internal successors, (731), 355 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:42,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 731 transitions. [2021-06-05 22:50:42,350 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 731 transitions. Word has length 72 [2021-06-05 22:50:42,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:42,350 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 731 transitions. [2021-06-05 22:50:42,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 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) [2021-06-05 22:50:42,351 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 731 transitions. [2021-06-05 22:50:42,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-06-05 22:50:42,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:42,351 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:42,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:42,576 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:42,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:42,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1768231027, now seen corresponding path program 42 times [2021-06-05 22:50:42,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:42,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124912337] [2021-06-05 22:50:42,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:42,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:42,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124912337] [2021-06-05 22:50:42,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124912337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:42,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230451885] [2021-06-05 22:50:42,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:42,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-05 22:50:42,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:42,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:50:42,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:43,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230451885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:43,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:43,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-06-05 22:50:43,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513642951] [2021-06-05 22:50:43,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 22:50:43,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:43,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 22:50:43,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2044, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:50:43,666 INFO L87 Difference]: Start difference. First operand 356 states and 731 transitions. Second operand has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:53,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:53,171 INFO L93 Difference]: Finished difference Result 3035 states and 6045 transitions. [2021-06-05 22:50:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-06-05 22:50:53,171 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-06-05 22:50:53,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:53,173 INFO L225 Difference]: With dead ends: 3035 [2021-06-05 22:50:53,173 INFO L226 Difference]: Without dead ends: 3031 [2021-06-05 22:50:53,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51852 ImplicationChecksByTransitivity, 8899.6ms TimeCoverageRelationStatistics Valid=26618, Invalid=86614, Unknown=0, NotChecked=0, Total=113232 [2021-06-05 22:50:53,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-06-05 22:50:53,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 300. [2021-06-05 22:50:53,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.0735785953177257) internal successors, (620), 299 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:53,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 620 transitions. [2021-06-05 22:50:53,188 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 620 transitions. Word has length 72 [2021-06-05 22:50:53,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:53,188 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 620 transitions. [2021-06-05 22:50:53,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:53,189 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 620 transitions. [2021-06-05 22:50:53,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-06-05 22:50:53,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:53,189 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:53,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:53,409 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:53,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:53,410 INFO L82 PathProgramCache]: Analyzing trace with hash -372460187, now seen corresponding path program 43 times [2021-06-05 22:50:53,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:53,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507421419] [2021-06-05 22:50:53,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:53,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:53,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507421419] [2021-06-05 22:50:53,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507421419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:53,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718723848] [2021-06-05 22:50:53,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:53,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 22:50:53,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:53,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718723848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:53,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:53,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 22:50:53,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828897270] [2021-06-05 22:50:53,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:50:53,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:53,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:50:53,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:50:53,752 INFO L87 Difference]: Start difference. First operand 300 states and 620 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:54,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:54,035 INFO L93 Difference]: Finished difference Result 929 states and 1830 transitions. [2021-06-05 22:50:54,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:50:54,036 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-06-05 22:50:54,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:54,037 INFO L225 Difference]: With dead ends: 929 [2021-06-05 22:50:54,037 INFO L226 Difference]: Without dead ends: 824 [2021-06-05 22:50:54,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:50:54,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-06-05 22:50:54,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 625. [2021-06-05 22:50:54,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.1538461538461537) internal successors, (1344), 624 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:54,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1344 transitions. [2021-06-05 22:50:54,044 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1344 transitions. Word has length 74 [2021-06-05 22:50:54,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:54,044 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1344 transitions. [2021-06-05 22:50:54,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:54,044 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1344 transitions. [2021-06-05 22:50:54,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:50:54,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:54,045 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:54,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 22:50:54,254 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:54,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:54,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1948763293, now seen corresponding path program 44 times [2021-06-05 22:50:54,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:54,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843902185] [2021-06-05 22:50:54,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:54,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:54,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843902185] [2021-06-05 22:50:54,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843902185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:54,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354498659] [2021-06-05 22:50:54,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:54,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:50:54,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:54,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:50:54,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:55,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354498659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:55,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:55,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2021-06-05 22:50:55,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955067720] [2021-06-05 22:50:55,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-06-05 22:50:55,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:55,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-06-05 22:50:55,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3995, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:50:55,905 INFO L87 Difference]: Start difference. First operand 625 states and 1344 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:09,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:09,629 INFO L93 Difference]: Finished difference Result 5109 states and 10077 transitions. [2021-06-05 22:51:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2021-06-05 22:51:09,629 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 22:51:09,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:09,633 INFO L225 Difference]: With dead ends: 5109 [2021-06-05 22:51:09,633 INFO L226 Difference]: Without dead ends: 4143 [2021-06-05 22:51:09,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66817 ImplicationChecksByTransitivity, 11809.7ms TimeCoverageRelationStatistics Valid=41625, Invalid=110085, Unknown=0, NotChecked=0, Total=151710 [2021-06-05 22:51:09,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2021-06-05 22:51:09,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 378. [2021-06-05 22:51:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.061007957559682) internal successors, (777), 377 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:09,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 777 transitions. [2021-06-05 22:51:09,654 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 777 transitions. Word has length 76 [2021-06-05 22:51:09,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:09,655 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 777 transitions. [2021-06-05 22:51:09,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 777 transitions. [2021-06-05 22:51:09,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 22:51:09,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:09,656 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:09,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 22:51:09,865 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:09,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:09,865 INFO L82 PathProgramCache]: Analyzing trace with hash 122702221, now seen corresponding path program 45 times [2021-06-05 22:51:09,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:09,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112831081] [2021-06-05 22:51:09,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:10,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:10,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112831081] [2021-06-05 22:51:10,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112831081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:10,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289956147] [2021-06-05 22:51:10,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:10,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-06-05 22:51:10,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:10,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:51:10,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:11,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289956147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:11,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:11,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 53 [2021-06-05 22:51:11,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467060211] [2021-06-05 22:51:11,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 22:51:11,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:11,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 22:51:11,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:51:11,096 INFO L87 Difference]: Start difference. First operand 378 states and 777 transitions. Second operand has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 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) [2021-06-05 22:51:22,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:22,179 INFO L93 Difference]: Finished difference Result 3411 states and 6797 transitions. [2021-06-05 22:51:22,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-06-05 22:51:22,179 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 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) Word has length 76 [2021-06-05 22:51:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:22,182 INFO L225 Difference]: With dead ends: 3411 [2021-06-05 22:51:22,182 INFO L226 Difference]: Without dead ends: 3407 [2021-06-05 22:51:22,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65510 ImplicationChecksByTransitivity, 10316.3ms TimeCoverageRelationStatistics Valid=32999, Invalid=107251, Unknown=0, NotChecked=0, Total=140250 [2021-06-05 22:51:22,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-06-05 22:51:22,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 318. [2021-06-05 22:51:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.0757097791798107) internal successors, (658), 317 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:22,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 658 transitions. [2021-06-05 22:51:22,198 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 658 transitions. Word has length 76 [2021-06-05 22:51:22,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:22,198 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 658 transitions. [2021-06-05 22:51:22,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 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) [2021-06-05 22:51:22,198 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 658 transitions. [2021-06-05 22:51:22,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-06-05 22:51:22,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:22,199 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:22,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 22:51:22,399 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:22,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:22,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1078500063, now seen corresponding path program 46 times [2021-06-05 22:51:22,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:22,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693488582] [2021-06-05 22:51:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:22,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:22,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693488582] [2021-06-05 22:51:22,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693488582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:22,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900273273] [2021-06-05 22:51:22,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:22,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:51:22,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:22,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 22:51:22,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:22,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900273273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:22,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:22,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 22:51:22,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454442840] [2021-06-05 22:51:22,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:51:22,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:22,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:51:22,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:51:22,775 INFO L87 Difference]: Start difference. First operand 318 states and 658 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:23,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:23,091 INFO L93 Difference]: Finished difference Result 988 states and 1947 transitions. [2021-06-05 22:51:23,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:51:23,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-06-05 22:51:23,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:23,092 INFO L225 Difference]: With dead ends: 988 [2021-06-05 22:51:23,092 INFO L226 Difference]: Without dead ends: 877 [2021-06-05 22:51:23,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:51:23,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-06-05 22:51:23,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 665. [2021-06-05 22:51:23,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.1551204819277108) internal successors, (1431), 664 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:23,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1431 transitions. [2021-06-05 22:51:23,098 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1431 transitions. Word has length 78 [2021-06-05 22:51:23,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:23,098 INFO L482 AbstractCegarLoop]: Abstraction has 665 states and 1431 transitions. [2021-06-05 22:51:23,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:23,098 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1431 transitions. [2021-06-05 22:51:23,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 22:51:23,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:23,099 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:23,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:23,312 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:23,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:23,313 INFO L82 PathProgramCache]: Analyzing trace with hash -999048161, now seen corresponding path program 47 times [2021-06-05 22:51:23,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:23,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929320975] [2021-06-05 22:51:23,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:23,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:23,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929320975] [2021-06-05 22:51:23,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929320975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:23,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870131193] [2021-06-05 22:51:23,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:23,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-06-05 22:51:23,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:23,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:51:23,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:25,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870131193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:25,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:25,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2021-06-05 22:51:25,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242251266] [2021-06-05 22:51:25,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-06-05 22:51:25,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:25,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-06-05 22:51:25,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=4473, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 22:51:25,036 INFO L87 Difference]: Start difference. First operand 665 states and 1431 transitions. Second operand has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:41,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:41,092 INFO L93 Difference]: Finished difference Result 5670 states and 11191 transitions. [2021-06-05 22:51:41,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2021-06-05 22:51:41,092 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 22:51:41,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:41,096 INFO L225 Difference]: With dead ends: 5670 [2021-06-05 22:51:41,096 INFO L226 Difference]: Without dead ends: 4590 [2021-06-05 22:51:41,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83508 ImplicationChecksByTransitivity, 13629.0ms TimeCoverageRelationStatistics Valid=51145, Invalid=134185, Unknown=0, NotChecked=0, Total=185330 [2021-06-05 22:51:41,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4590 states. [2021-06-05 22:51:41,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4590 to 400. [2021-06-05 22:51:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.06265664160401) internal successors, (823), 399 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:41,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 823 transitions. [2021-06-05 22:51:41,123 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 823 transitions. Word has length 80 [2021-06-05 22:51:41,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:41,123 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 823 transitions. [2021-06-05 22:51:41,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:41,123 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 823 transitions. [2021-06-05 22:51:41,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 22:51:41,124 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:41,125 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:41,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 22:51:41,345 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:41,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:41,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2100824947, now seen corresponding path program 48 times [2021-06-05 22:51:41,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:41,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439810310] [2021-06-05 22:51:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:41,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:41,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439810310] [2021-06-05 22:51:41,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439810310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:41,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406587179] [2021-06-05 22:51:41,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:41,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-06-05 22:51:41,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:41,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:51:41,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:42,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406587179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:42,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:42,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 56 [2021-06-05 22:51:42,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367410041] [2021-06-05 22:51:42,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-05 22:51:42,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:42,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-05 22:51:42,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2569, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:51:42,653 INFO L87 Difference]: Start difference. First operand 400 states and 823 transitions. Second operand has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:55,095 INFO L93 Difference]: Finished difference Result 3809 states and 7593 transitions. [2021-06-05 22:51:55,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2021-06-05 22:51:55,095 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 22:51:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:55,098 INFO L225 Difference]: With dead ends: 3809 [2021-06-05 22:51:55,098 INFO L226 Difference]: Without dead ends: 3805 [2021-06-05 22:51:55,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81707 ImplicationChecksByTransitivity, 11820.9ms TimeCoverageRelationStatistics Valid=40466, Invalid=131344, Unknown=0, NotChecked=0, Total=171810 [2021-06-05 22:51:55,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-06-05 22:51:55,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 336. [2021-06-05 22:51:55,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.0776119402985076) internal successors, (696), 335 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 696 transitions. [2021-06-05 22:51:55,116 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 696 transitions. Word has length 80 [2021-06-05 22:51:55,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:55,116 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 696 transitions. [2021-06-05 22:51:55,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:55,116 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 696 transitions. [2021-06-05 22:51:55,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-06-05 22:51:55,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:55,117 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:55,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:55,317 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:55,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:55,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1064675037, now seen corresponding path program 49 times [2021-06-05 22:51:55,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:55,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743045810] [2021-06-05 22:51:55,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:55,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:55,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743045810] [2021-06-05 22:51:55,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743045810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:55,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126609903] [2021-06-05 22:51:55,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:55,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 71 conjunts are in the unsatisfiable core [2021-06-05 22:51:55,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:55,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126609903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:55,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:55,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-06-05 22:51:55,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915335818] [2021-06-05 22:51:55,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:51:55,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:55,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:51:55,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:51:55,693 INFO L87 Difference]: Start difference. First operand 336 states and 696 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:56,066 INFO L93 Difference]: Finished difference Result 1047 states and 2064 transitions. [2021-06-05 22:51:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:51:56,066 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-06-05 22:51:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:56,067 INFO L225 Difference]: With dead ends: 1047 [2021-06-05 22:51:56,067 INFO L226 Difference]: Without dead ends: 930 [2021-06-05 22:51:56,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:51:56,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-05 22:51:56,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 705. [2021-06-05 22:51:56,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.15625) internal successors, (1518), 704 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) [2021-06-05 22:51:56,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1518 transitions. [2021-06-05 22:51:56,073 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1518 transitions. Word has length 82 [2021-06-05 22:51:56,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:56,073 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 1518 transitions. [2021-06-05 22:51:56,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:56,074 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1518 transitions. [2021-06-05 22:51:56,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-06-05 22:51:56,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:56,075 INFO L554 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:56,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:56,289 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:56,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:56,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1343377115, now seen corresponding path program 50 times [2021-06-05 22:51:56,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:56,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549261927] [2021-06-05 22:51:56,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:57,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:57,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549261927] [2021-06-05 22:51:57,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549261927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:57,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289317211] [2021-06-05 22:51:57,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:57,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:51:57,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:57,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:51:57,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:58,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289317211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:58,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:58,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2021-06-05 22:51:58,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236141897] [2021-06-05 22:51:58,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-06-05 22:51:58,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:58,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-06-05 22:51:58,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1028, Invalid=4978, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 22:51:58,314 INFO L87 Difference]: Start difference. First operand 705 states and 1518 transitions. Second operand has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:16,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:16,579 INFO L93 Difference]: Finished difference Result 6259 states and 12361 transitions. [2021-06-05 22:52:16,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-06-05 22:52:16,579 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-06-05 22:52:16,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:16,583 INFO L225 Difference]: With dead ends: 6259 [2021-06-05 22:52:16,583 INFO L226 Difference]: Without dead ends: 5059 [2021-06-05 22:52:16,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103165 ImplicationChecksByTransitivity, 15831.1ms TimeCoverageRelationStatistics Valid=62217, Invalid=161985, Unknown=0, NotChecked=0, Total=224202 [2021-06-05 22:52:16,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5059 states. [2021-06-05 22:52:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5059 to 422. [2021-06-05 22:52:16,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.0641330166270784) internal successors, (869), 421 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 869 transitions. [2021-06-05 22:52:16,608 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 869 transitions. Word has length 84 [2021-06-05 22:52:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:16,608 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 869 transitions. [2021-06-05 22:52:16,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 869 transitions. [2021-06-05 22:52:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-06-05 22:52:16,608 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:16,609 INFO L554 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:16,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 22:52:16,809 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:16,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:16,809 INFO L82 PathProgramCache]: Analyzing trace with hash 182530189, now seen corresponding path program 51 times [2021-06-05 22:52:16,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:16,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623155887] [2021-06-05 22:52:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:17,093 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:17,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:17,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623155887] [2021-06-05 22:52:17,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623155887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:17,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028827883] [2021-06-05 22:52:17,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:17,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-06-05 22:52:17,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:17,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 22:52:17,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:18,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028827883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:18,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:18,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2021-06-05 22:52:18,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963970298] [2021-06-05 22:52:18,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-06-05 22:52:18,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:18,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-06-05 22:52:18,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=2854, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:52:18,219 INFO L87 Difference]: Start difference. First operand 422 states and 869 transitions. Second operand has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:32,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:32,804 INFO L93 Difference]: Finished difference Result 4229 states and 8433 transitions. [2021-06-05 22:52:32,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2021-06-05 22:52:32,805 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-06-05 22:52:32,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:32,808 INFO L225 Difference]: With dead ends: 4229 [2021-06-05 22:52:32,808 INFO L226 Difference]: Without dead ends: 4225 [2021-06-05 22:52:32,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100740 ImplicationChecksByTransitivity, 13585.9ms TimeCoverageRelationStatistics Valid=49136, Invalid=159256, Unknown=0, NotChecked=0, Total=208392 [2021-06-05 22:52:32,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-06-05 22:52:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 354. [2021-06-05 22:52:32,829 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) [2021-06-05 22:52:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 734 transitions. [2021-06-05 22:52:32,830 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 734 transitions. Word has length 84 [2021-06-05 22:52:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:32,830 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 734 transitions. [2021-06-05 22:52:32,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:32,830 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 734 transitions. [2021-06-05 22:52:32,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 22:52:32,830 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:32,831 INFO L554 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:33,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:33,031 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:33,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:33,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1572502169, now seen corresponding path program 52 times [2021-06-05 22:52:33,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:33,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634370767] [2021-06-05 22:52:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:33,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:33,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634370767] [2021-06-05 22:52:33,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634370767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:33,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820078867] [2021-06-05 22:52:33,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:33,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:52:33,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:33,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 22:52:33,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:33,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820078867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:33,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:33,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-06-05 22:52:33,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270862093] [2021-06-05 22:52:33,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:52:33,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:33,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:52:33,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:52:33,473 INFO L87 Difference]: Start difference. First operand 354 states and 734 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:33,866 INFO L93 Difference]: Finished difference Result 1106 states and 2181 transitions. [2021-06-05 22:52:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:52:33,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-05 22:52:33,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:33,868 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 22:52:33,868 INFO L226 Difference]: Without dead ends: 983 [2021-06-05 22:52:33,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:52:33,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-05 22:52:33,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 745. [2021-06-05 22:52:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.157258064516129) internal successors, (1605), 744 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1605 transitions. [2021-06-05 22:52:33,875 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1605 transitions. Word has length 86 [2021-06-05 22:52:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:33,875 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 1605 transitions. [2021-06-05 22:52:33,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1605 transitions. [2021-06-05 22:52:33,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-06-05 22:52:33,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:33,876 INFO L554 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:34,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 22:52:34,082 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:34,082 INFO L82 PathProgramCache]: Analyzing trace with hash -5835881, now seen corresponding path program 53 times [2021-06-05 22:52:34,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:34,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453910062] [2021-06-05 22:52:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:34,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:34,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453910062] [2021-06-05 22:52:34,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453910062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:34,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893037340] [2021-06-05 22:52:34,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:34,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-06-05 22:52:34,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:34,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:52:34,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:36,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893037340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:36,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:36,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 81 [2021-06-05 22:52:36,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841826306] [2021-06-05 22:52:36,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-06-05 22:52:36,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:36,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-06-05 22:52:36,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=5510, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 22:52:36,085 INFO L87 Difference]: Start difference. First operand 745 states and 1605 transitions. Second operand has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:57,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:57,267 INFO L93 Difference]: Finished difference Result 6876 states and 13587 transitions. [2021-06-05 22:52:57,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-06-05 22:52:57,268 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-06-05 22:52:57,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:57,272 INFO L225 Difference]: With dead ends: 6876 [2021-06-05 22:52:57,272 INFO L226 Difference]: Without dead ends: 5550 [2021-06-05 22:52:57,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126123 ImplicationChecksByTransitivity, 18073.9ms TimeCoverageRelationStatistics Valid=75002, Invalid=193840, Unknown=0, NotChecked=0, Total=268842 [2021-06-05 22:52:57,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2021-06-05 22:52:57,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 444. [2021-06-05 22:52:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0654627539503387) internal successors, (915), 443 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 915 transitions. [2021-06-05 22:52:57,298 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 915 transitions. Word has length 88 [2021-06-05 22:52:57,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:57,298 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 915 transitions. [2021-06-05 22:52:57,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:57,299 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 915 transitions. [2021-06-05 22:52:57,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-06-05 22:52:57,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:57,299 INFO L554 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:57,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 22:52:57,500 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:57,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:57,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2098512499, now seen corresponding path program 54 times [2021-06-05 22:52:57,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:57,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591289349] [2021-06-05 22:52:57,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:57,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:57,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591289349] [2021-06-05 22:52:57,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591289349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:57,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109415281] [2021-06-05 22:52:57,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:57,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-06-05 22:52:57,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:57,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:52:57,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:59,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109415281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:59,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:59,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-06-05 22:52:59,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47559736] [2021-06-05 22:52:59,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-06-05 22:52:59,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:59,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-06-05 22:52:59,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=3154, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:52:59,114 INFO L87 Difference]: Start difference. First operand 444 states and 915 transitions. Second operand has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:15,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:15,782 INFO L93 Difference]: Finished difference Result 4671 states and 9317 transitions. [2021-06-05 22:53:15,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2021-06-05 22:53:15,783 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-06-05 22:53:15,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:15,787 INFO L225 Difference]: With dead ends: 4671 [2021-06-05 22:53:15,787 INFO L226 Difference]: Without dead ends: 4667 [2021-06-05 22:53:15,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122923 ImplicationChecksByTransitivity, 15552.9ms TimeCoverageRelationStatistics Valid=59132, Invalid=191368, Unknown=0, NotChecked=0, Total=250500 [2021-06-05 22:53:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2021-06-05 22:53:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 372. [2021-06-05 22:53:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.0808625336927222) internal successors, (772), 371 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 772 transitions. [2021-06-05 22:53:15,819 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 772 transitions. Word has length 88 [2021-06-05 22:53:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:15,819 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 772 transitions. [2021-06-05 22:53:15,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:15,820 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 772 transitions. [2021-06-05 22:53:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 22:53:15,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:15,820 INFO L554 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:16,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:16,036 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:16,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:16,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2058936405, now seen corresponding path program 55 times [2021-06-05 22:53:16,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:16,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546446966] [2021-06-05 22:53:16,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:16,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:16,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546446966] [2021-06-05 22:53:16,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546446966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:16,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970468029] [2021-06-05 22:53:16,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:16,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 79 conjunts are in the unsatisfiable core [2021-06-05 22:53:16,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:16,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970468029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:16,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:16,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 22:53:16,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386483611] [2021-06-05 22:53:16,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:53:16,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:16,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:53:16,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:53:16,467 INFO L87 Difference]: Start difference. First operand 372 states and 772 transitions. Second operand has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:16,900 INFO L93 Difference]: Finished difference Result 1165 states and 2298 transitions. [2021-06-05 22:53:16,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:53:16,901 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 22:53:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:16,902 INFO L225 Difference]: With dead ends: 1165 [2021-06-05 22:53:16,902 INFO L226 Difference]: Without dead ends: 1036 [2021-06-05 22:53:16,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:53:16,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-06-05 22:53:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 785. [2021-06-05 22:53:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.1581632653061225) internal successors, (1692), 784 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1692 transitions. [2021-06-05 22:53:16,909 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1692 transitions. Word has length 90 [2021-06-05 22:53:16,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:16,909 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 1692 transitions. [2021-06-05 22:53:16,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:16,909 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1692 transitions. [2021-06-05 22:53:16,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-06-05 22:53:16,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:16,910 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:17,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 22:53:17,113 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:17,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:17,113 INFO L82 PathProgramCache]: Analyzing trace with hash -274421165, now seen corresponding path program 56 times [2021-06-05 22:53:17,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:17,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586258259] [2021-06-05 22:53:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:17,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:17,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586258259] [2021-06-05 22:53:17,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586258259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:17,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520131505] [2021-06-05 22:53:17,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:17,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:53:17,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:53:17,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:53:17,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:19,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520131505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:19,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:19,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2021-06-05 22:53:19,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912907122] [2021-06-05 22:53:19,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-06-05 22:53:19,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:19,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-06-05 22:53:19,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=6069, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 22:53:19,306 INFO L87 Difference]: Start difference. First operand 785 states and 1692 transitions. Second operand has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:43,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:43,493 INFO L93 Difference]: Finished difference Result 7521 states and 14869 transitions. [2021-06-05 22:53:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2021-06-05 22:53:43,493 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-06-05 22:53:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:43,497 INFO L225 Difference]: With dead ends: 7521 [2021-06-05 22:53:43,497 INFO L226 Difference]: Without dead ends: 6063 [2021-06-05 22:53:43,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152734 ImplicationChecksByTransitivity, 20677.0ms TimeCoverageRelationStatistics Valid=89669, Invalid=230121, Unknown=0, NotChecked=0, Total=319790 [2021-06-05 22:53:43,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-06-05 22:53:43,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 466. [2021-06-05 22:53:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.066666666666667) internal successors, (961), 465 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 961 transitions. [2021-06-05 22:53:43,531 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 961 transitions. Word has length 92 [2021-06-05 22:53:43,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:43,531 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 961 transitions. [2021-06-05 22:53:43,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 961 transitions. [2021-06-05 22:53:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-06-05 22:53:43,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:43,532 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:43,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:43,753 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:43,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:43,753 INFO L82 PathProgramCache]: Analyzing trace with hash -207266931, now seen corresponding path program 57 times [2021-06-05 22:53:43,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:43,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136352707] [2021-06-05 22:53:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:44,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:44,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136352707] [2021-06-05 22:53:44,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136352707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:44,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587254898] [2021-06-05 22:53:44,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:44,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-06-05 22:53:44,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:53:44,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:53:44,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:45,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587254898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:45,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:45,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 65 [2021-06-05 22:53:45,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45103235] [2021-06-05 22:53:45,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-06-05 22:53:45,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:45,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-06-05 22:53:45,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3469, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 22:53:45,510 INFO L87 Difference]: Start difference. First operand 466 states and 961 transitions. Second operand has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:04,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:04,541 INFO L93 Difference]: Finished difference Result 5135 states and 10245 transitions. [2021-06-05 22:54:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 485 states. [2021-06-05 22:54:04,541 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-06-05 22:54:04,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:04,545 INFO L225 Difference]: With dead ends: 5135 [2021-06-05 22:54:04,545 INFO L226 Difference]: Without dead ends: 5131 [2021-06-05 22:54:04,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 545 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148586 ImplicationChecksByTransitivity, 17885.6ms TimeCoverageRelationStatistics Valid=70583, Invalid=228079, Unknown=0, NotChecked=0, Total=298662 [2021-06-05 22:54:04,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2021-06-05 22:54:04,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 390. [2021-06-05 22:54:04,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.082262210796915) internal successors, (810), 389 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 810 transitions. [2021-06-05 22:54:04,570 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 810 transitions. Word has length 92 [2021-06-05 22:54:04,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:04,570 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 810 transitions. [2021-06-05 22:54:04,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:04,570 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 810 transitions. [2021-06-05 22:54:04,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-06-05 22:54:04,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:04,571 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:04,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 22:54:04,771 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:04,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:04,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1646516241, now seen corresponding path program 58 times [2021-06-05 22:54:04,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:04,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747249060] [2021-06-05 22:54:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:05,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:05,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747249060] [2021-06-05 22:54:05,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747249060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:05,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078631602] [2021-06-05 22:54:05,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:05,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:54:05,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:54:05,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 83 conjunts are in the unsatisfiable core [2021-06-05 22:54:05,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:05,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078631602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:05,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:05,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 22:54:05,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534418701] [2021-06-05 22:54:05,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:54:05,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:05,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:54:05,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:54:05,283 INFO L87 Difference]: Start difference. First operand 390 states and 810 transitions. Second operand has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:05,762 INFO L93 Difference]: Finished difference Result 1224 states and 2415 transitions. [2021-06-05 22:54:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:54:05,763 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-06-05 22:54:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:05,764 INFO L225 Difference]: With dead ends: 1224 [2021-06-05 22:54:05,764 INFO L226 Difference]: Without dead ends: 1089 [2021-06-05 22:54:05,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:54:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-05 22:54:05,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 825. [2021-06-05 22:54:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.158980582524272) internal successors, (1779), 824 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:05,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1779 transitions. [2021-06-05 22:54:05,773 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1779 transitions. Word has length 94 [2021-06-05 22:54:05,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:05,773 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 1779 transitions. [2021-06-05 22:54:05,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1779 transitions. [2021-06-05 22:54:05,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:54:05,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:05,774 INFO L554 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:05,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:05,989 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:05,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:05,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2013367537, now seen corresponding path program 59 times [2021-06-05 22:54:05,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:05,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223282639] [2021-06-05 22:54:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:06,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:06,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223282639] [2021-06-05 22:54:06,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223282639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:06,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242679916] [2021-06-05 22:54:06,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:06,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-06-05 22:54:06,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:54:06,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 22:54:06,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:08,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242679916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:08,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:08,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 89 [2021-06-05 22:54:08,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797756935] [2021-06-05 22:54:08,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-06-05 22:54:08,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:08,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-06-05 22:54:08,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=6655, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 22:54:08,434 INFO L87 Difference]: Start difference. First operand 825 states and 1779 transitions. Second operand has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:37,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:37,026 INFO L93 Difference]: Finished difference Result 8194 states and 16207 transitions. [2021-06-05 22:54:37,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 529 states. [2021-06-05 22:54:37,026 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 22:54:37,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:37,032 INFO L225 Difference]: With dead ends: 8194 [2021-06-05 22:54:37,032 INFO L226 Difference]: Without dead ends: 6598 [2021-06-05 22:54:37,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183369 ImplicationChecksByTransitivity, 23716.1ms TimeCoverageRelationStatistics Valid=106395, Invalid=271215, Unknown=0, NotChecked=0, Total=377610 [2021-06-05 22:54:37,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6598 states. [2021-06-05 22:54:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6598 to 488. [2021-06-05 22:54:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.0677618069815193) internal successors, (1007), 487 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1007 transitions. [2021-06-05 22:54:37,070 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1007 transitions. Word has length 96 [2021-06-05 22:54:37,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:37,070 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1007 transitions. [2021-06-05 22:54:37,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:37,071 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1007 transitions. [2021-06-05 22:54:37,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 22:54:37,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:37,071 INFO L554 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:37,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 22:54:37,272 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:37,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:37,272 INFO L82 PathProgramCache]: Analyzing trace with hash -817968499, now seen corresponding path program 60 times [2021-06-05 22:54:37,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:37,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30229596] [2021-06-05 22:54:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:37,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:37,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30229596] [2021-06-05 22:54:37,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30229596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:37,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016214568] [2021-06-05 22:54:37,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:37,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-06-05 22:54:37,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:54:37,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 22:54:37,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:39,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016214568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:39,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:39,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45] total 68 [2021-06-05 22:54:39,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910895722] [2021-06-05 22:54:39,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-06-05 22:54:39,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:39,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-06-05 22:54:39,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=3799, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:54:39,130 INFO L87 Difference]: Start difference. First operand 488 states and 1007 transitions. Second operand has 69 states, 69 states have (on average 2.63768115942029) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:00,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:55:00,458 INFO L93 Difference]: Finished difference Result 5621 states and 11217 transitions. [2021-06-05 22:55:00,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 530 states. [2021-06-05 22:55:00,458 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.63768115942029) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 22:55:00,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:55:00,462 INFO L225 Difference]: With dead ends: 5621 [2021-06-05 22:55:00,462 INFO L226 Difference]: Without dead ends: 5617 [2021-06-05 22:55:00,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 593 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178076 ImplicationChecksByTransitivity, 19923.8ms TimeCoverageRelationStatistics Valid=83624, Invalid=269806, Unknown=0, NotChecked=0, Total=353430 [2021-06-05 22:55:00,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2021-06-05 22:55:00,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 408. [2021-06-05 22:55:00,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.0835380835380835) internal successors, (848), 407 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) [2021-06-05 22:55:00,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 848 transitions. [2021-06-05 22:55:00,502 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 848 transitions. Word has length 96 [2021-06-05 22:55:00,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:55:00,502 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 848 transitions. [2021-06-05 22:55:00,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.63768115942029) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:00,502 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 848 transitions. [2021-06-05 22:55:00,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-06-05 22:55:00,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:55:00,503 INFO L554 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:55:00,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:00,721 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:55:00,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:55:00,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1261330893, now seen corresponding path program 61 times [2021-06-05 22:55:00,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:55:00,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429969480] [2021-06-05 22:55:00,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:55:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:01,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:55:01,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429969480] [2021-06-05 22:55:01,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429969480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:01,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125067352] [2021-06-05 22:55:01,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:01,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 87 conjunts are in the unsatisfiable core [2021-06-05 22:55:01,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:55:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:01,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125067352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:01,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:55:01,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 22:55:01,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192680694] [2021-06-05 22:55:01,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:55:01,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:55:01,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:55:01,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:55:01,194 INFO L87 Difference]: Start difference. First operand 408 states and 848 transitions. Second operand has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:01,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:55:01,721 INFO L93 Difference]: Finished difference Result 1283 states and 2532 transitions. [2021-06-05 22:55:01,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:55:01,722 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-06-05 22:55:01,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:55:01,723 INFO L225 Difference]: With dead ends: 1283 [2021-06-05 22:55:01,723 INFO L226 Difference]: Without dead ends: 1142 [2021-06-05 22:55:01,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 252.1ms TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:55:01,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-06-05 22:55:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 865. [2021-06-05 22:55:01,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.1597222222222223) internal successors, (1866), 864 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1866 transitions. [2021-06-05 22:55:01,730 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1866 transitions. Word has length 98 [2021-06-05 22:55:01,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:55:01,731 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 1866 transitions. [2021-06-05 22:55:01,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1866 transitions. [2021-06-05 22:55:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 22:55:01,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:55:01,732 INFO L554 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:55:01,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 22:55:01,932 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:55:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:55:01,933 INFO L82 PathProgramCache]: Analyzing trace with hash 2082950603, now seen corresponding path program 62 times [2021-06-05 22:55:01,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:55:01,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792812141] [2021-06-05 22:55:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:55:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:02,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:55:02,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792812141] [2021-06-05 22:55:02,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792812141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:02,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571885860] [2021-06-05 22:55:02,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:02,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:55:02,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:55:02,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:55:02,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:55:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:04,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571885860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:04,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:55:04,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 93 [2021-06-05 22:55:04,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648219315] [2021-06-05 22:55:04,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-06-05 22:55:04,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:55:04,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-06-05 22:55:04,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1474, Invalid=7268, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 22:55:04,449 INFO L87 Difference]: Start difference. First operand 865 states and 1866 transitions. Second operand has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:36,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:55:36,749 INFO L93 Difference]: Finished difference Result 8895 states and 17601 transitions. [2021-06-05 22:55:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 576 states. [2021-06-05 22:55:36,750 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 22:55:36,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:55:36,756 INFO L225 Difference]: With dead ends: 8895 [2021-06-05 22:55:36,756 INFO L226 Difference]: Without dead ends: 7155 [2021-06-05 22:55:36,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218416 ImplicationChecksByTransitivity, 26800.8ms TimeCoverageRelationStatistics Valid=125365, Invalid=317525, Unknown=0, NotChecked=0, Total=442890 [2021-06-05 22:55:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7155 states. [2021-06-05 22:55:36,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7155 to 510. [2021-06-05 22:55:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 2.068762278978389) internal successors, (1053), 509 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1053 transitions. [2021-06-05 22:55:36,796 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1053 transitions. Word has length 100 [2021-06-05 22:55:36,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:55:36,796 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1053 transitions. [2021-06-05 22:55:36,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1053 transitions. [2021-06-05 22:55:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 22:55:36,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:55:36,797 INFO L554 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:55:36,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:36,998 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:55:36,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:55:36,998 INFO L82 PathProgramCache]: Analyzing trace with hash 894880397, now seen corresponding path program 63 times [2021-06-05 22:55:36,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:55:36,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601621939] [2021-06-05 22:55:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:55:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:37,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:55:37,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601621939] [2021-06-05 22:55:37,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601621939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:37,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444419619] [2021-06-05 22:55:37,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:37,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-06-05 22:55:37,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:55:37,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:55:37,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:55:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:38,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444419619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:38,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:55:38,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 47] total 71 [2021-06-05 22:55:38,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701516144] [2021-06-05 22:55:38,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-06-05 22:55:38,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:55:38,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-06-05 22:55:38,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=4144, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 22:55:38,968 INFO L87 Difference]: Start difference. First operand 510 states and 1053 transitions. Second operand has 72 states, 72 states have (on average 2.638888888888889) internal successors, (190), 71 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:03,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:03,292 INFO L93 Difference]: Finished difference Result 6129 states and 12233 transitions. [2021-06-05 22:56:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 577 states. [2021-06-05 22:56:03,293 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.638888888888889) internal successors, (190), 71 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 22:56:03,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:03,298 INFO L225 Difference]: With dead ends: 6129 [2021-06-05 22:56:03,298 INFO L226 Difference]: Without dead ends: 6125 [2021-06-05 22:56:03,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 643 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211756 ImplicationChecksByTransitivity, 22679.2ms TimeCoverageRelationStatistics Valid=98396, Invalid=316984, Unknown=0, NotChecked=0, Total=415380 [2021-06-05 22:56:03,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6125 states. [2021-06-05 22:56:03,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6125 to 426. [2021-06-05 22:56:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.084705882352941) internal successors, (886), 425 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 886 transitions. [2021-06-05 22:56:03,332 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 886 transitions. Word has length 100 [2021-06-05 22:56:03,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:03,332 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 886 transitions. [2021-06-05 22:56:03,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.638888888888889) internal successors, (190), 71 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 886 transitions. [2021-06-05 22:56:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-06-05 22:56:03,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:03,332 INFO L554 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:03,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 22:56:03,533 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:03,533 INFO L82 PathProgramCache]: Analyzing trace with hash -661946999, now seen corresponding path program 64 times [2021-06-05 22:56:03,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:03,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298900415] [2021-06-05 22:56:03,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:03,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:03,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298900415] [2021-06-05 22:56:03,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298900415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:03,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583210046] [2021-06-05 22:56:03,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:03,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:56:03,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:56:03,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 91 conjunts are in the unsatisfiable core [2021-06-05 22:56:03,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:04,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583210046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:04,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:04,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 22:56:04,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942743940] [2021-06-05 22:56:04,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:56:04,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:04,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:56:04,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:56:04,034 INFO L87 Difference]: Start difference. First operand 426 states and 886 transitions. Second operand has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:04,613 INFO L93 Difference]: Finished difference Result 1342 states and 2649 transitions. [2021-06-05 22:56:04,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:56:04,613 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-06-05 22:56:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:04,614 INFO L225 Difference]: With dead ends: 1342 [2021-06-05 22:56:04,615 INFO L226 Difference]: Without dead ends: 1195 [2021-06-05 22:56:04,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 273.8ms TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:56:04,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-06-05 22:56:04,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 905. [2021-06-05 22:56:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.1603982300884956) internal successors, (1953), 904 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1953 transitions. [2021-06-05 22:56:04,622 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1953 transitions. Word has length 102 [2021-06-05 22:56:04,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:04,622 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 1953 transitions. [2021-06-05 22:56:04,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1953 transitions. [2021-06-05 22:56:04,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-06-05 22:56:04,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:04,623 INFO L554 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:04,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 22:56:04,824 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:04,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:04,824 INFO L82 PathProgramCache]: Analyzing trace with hash -887997817, now seen corresponding path program 65 times [2021-06-05 22:56:04,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:04,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251865363] [2021-06-05 22:56:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:05,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:05,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251865363] [2021-06-05 22:56:05,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251865363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:05,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808944789] [2021-06-05 22:56:05,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:05,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-06-05 22:56:05,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:56:05,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:56:05,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:07,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808944789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:07,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:07,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 97 [2021-06-05 22:56:07,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173421298] [2021-06-05 22:56:07,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-06-05 22:56:07,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:07,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-06-05 22:56:07,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=7908, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 22:56:07,637 INFO L87 Difference]: Start difference. First operand 905 states and 1953 transitions. Second operand has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:44,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:44,641 INFO L93 Difference]: Finished difference Result 9624 states and 19051 transitions. [2021-06-05 22:56:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 625 states. [2021-06-05 22:56:44,642 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-06-05 22:56:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:44,648 INFO L225 Difference]: With dead ends: 9624 [2021-06-05 22:56:44,648 INFO L226 Difference]: Without dead ends: 7734 [2021-06-05 22:56:44,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 717 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258282 ImplicationChecksByTransitivity, 30138.6ms TimeCoverageRelationStatistics Valid=146772, Invalid=369470, Unknown=0, NotChecked=0, Total=516242 [2021-06-05 22:56:44,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7734 states. [2021-06-05 22:56:44,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7734 to 532. [2021-06-05 22:56:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.0696798493408664) internal successors, (1099), 531 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:44,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1099 transitions. [2021-06-05 22:56:44,685 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1099 transitions. Word has length 104 [2021-06-05 22:56:44,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:44,685 INFO L482 AbstractCegarLoop]: Abstraction has 532 states and 1099 transitions. [2021-06-05 22:56:44,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:44,685 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1099 transitions. [2021-06-05 22:56:44,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-06-05 22:56:44,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:44,686 INFO L554 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:44,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 22:56:44,886 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:44,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:44,886 INFO L82 PathProgramCache]: Analyzing trace with hash 922524557, now seen corresponding path program 66 times [2021-06-05 22:56:44,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:44,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965855963] [2021-06-05 22:56:44,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:45,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:45,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965855963] [2021-06-05 22:56:45,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965855963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:45,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615508562] [2021-06-05 22:56:45,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:45,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-06-05 22:56:45,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:56:45,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 22:56:45,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:46,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615508562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:46,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:46,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49] total 74 [2021-06-05 22:56:46,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504475185] [2021-06-05 22:56:46,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-06-05 22:56:46,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:46,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-06-05 22:56:46,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1046, Invalid=4504, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 22:56:46,916 INFO L87 Difference]: Start difference. First operand 532 states and 1099 transitions. Second operand has 75 states, 75 states have (on average 2.64) internal successors, (198), 74 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:13,837 INFO L93 Difference]: Finished difference Result 6659 states and 13293 transitions. [2021-06-05 22:57:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 626 states. [2021-06-05 22:57:13,838 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.64) internal successors, (198), 74 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-06-05 22:57:13,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:13,842 INFO L225 Difference]: With dead ends: 6659 [2021-06-05 22:57:13,843 INFO L226 Difference]: Without dead ends: 6655 [2021-06-05 22:57:13,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 695 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250006 ImplicationChecksByTransitivity, 24963.0ms TimeCoverageRelationStatistics Valid=115046, Invalid=370066, Unknown=0, NotChecked=0, Total=485112 [2021-06-05 22:57:13,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6655 states. [2021-06-05 22:57:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6655 to 444. [2021-06-05 22:57:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0857787810383748) internal successors, (924), 443 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 924 transitions. [2021-06-05 22:57:13,881 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 924 transitions. Word has length 104 [2021-06-05 22:57:13,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:13,881 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 924 transitions. [2021-06-05 22:57:13,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.64) internal successors, (198), 74 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:13,881 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 924 transitions. [2021-06-05 22:57:13,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-06-05 22:57:13,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:13,882 INFO L554 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:14,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:14,082 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:14,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:14,083 INFO L82 PathProgramCache]: Analyzing trace with hash 409873221, now seen corresponding path program 67 times [2021-06-05 22:57:14,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:14,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38596354] [2021-06-05 22:57:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:14,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:14,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38596354] [2021-06-05 22:57:14,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38596354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:14,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012660520] [2021-06-05 22:57:14,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:14,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 95 conjunts are in the unsatisfiable core [2021-06-05 22:57:14,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:14,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012660520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:14,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:14,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-05 22:57:14,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144898042] [2021-06-05 22:57:14,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:57:14,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:14,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:57:14,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:57:14,685 INFO L87 Difference]: Start difference. First operand 444 states and 924 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:15,300 INFO L93 Difference]: Finished difference Result 1401 states and 2766 transitions. [2021-06-05 22:57:15,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:57:15,300 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-06-05 22:57:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:15,301 INFO L225 Difference]: With dead ends: 1401 [2021-06-05 22:57:15,301 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 22:57:15,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 290.7ms TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:57:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 22:57:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 945. [2021-06-05 22:57:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 2.1610169491525424) internal successors, (2040), 944 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:15,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 2040 transitions. [2021-06-05 22:57:15,309 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 2040 transitions. Word has length 106 [2021-06-05 22:57:15,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:15,309 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 2040 transitions. [2021-06-05 22:57:15,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 2040 transitions. [2021-06-05 22:57:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-06-05 22:57:15,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:15,310 INFO L554 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:15,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 22:57:15,511 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:15,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:15,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1087227581, now seen corresponding path program 68 times [2021-06-05 22:57:15,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:15,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063435809] [2021-06-05 22:57:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:16,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:16,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063435809] [2021-06-05 22:57:16,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063435809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:16,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526621583] [2021-06-05 22:57:16,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:16,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:16,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:16,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:57:16,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:18,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526621583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:18,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:18,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 101 [2021-06-05 22:57:18,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927166341] [2021-06-05 22:57:18,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-06-05 22:57:18,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:18,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-06-05 22:57:18,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1727, Invalid=8575, Unknown=0, NotChecked=0, Total=10302 [2021-06-05 22:57:18,385 INFO L87 Difference]: Start difference. First operand 945 states and 2040 transitions. Second operand has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:00,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:00,689 INFO L93 Difference]: Finished difference Result 10381 states and 20557 transitions. [2021-06-05 22:58:00,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 676 states. [2021-06-05 22:58:00,690 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-06-05 22:58:00,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:00,697 INFO L225 Difference]: With dead ends: 10381 [2021-06-05 22:58:00,697 INFO L226 Difference]: Without dead ends: 8335 [2021-06-05 22:58:00,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 772 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303391 ImplicationChecksByTransitivity, 33252.2ms TimeCoverageRelationStatistics Valid=170817, Invalid=427485, Unknown=0, NotChecked=0, Total=598302 [2021-06-05 22:58:00,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8335 states. [2021-06-05 22:58:00,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8335 to 554. [2021-06-05 22:58:00,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.0705244122965643) internal successors, (1145), 553 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:00,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1145 transitions. [2021-06-05 22:58:00,746 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1145 transitions. Word has length 108 [2021-06-05 22:58:00,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:00,746 INFO L482 AbstractCegarLoop]: Abstraction has 554 states and 1145 transitions. [2021-06-05 22:58:00,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:00,746 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1145 transitions. [2021-06-05 22:58:00,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-06-05 22:58:00,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:00,747 INFO L554 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:00,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:00,947 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:00,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:00,947 INFO L82 PathProgramCache]: Analyzing trace with hash 447708557, now seen corresponding path program 69 times [2021-06-05 22:58:00,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:00,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821318809] [2021-06-05 22:58:00,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:01,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:01,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821318809] [2021-06-05 22:58:01,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821318809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:01,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644405215] [2021-06-05 22:58:01,338 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:01,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-06-05 22:58:01,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:01,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 22:58:01,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:03,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644405215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:03,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:03,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 51] total 77 [2021-06-05 22:58:03,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976003254] [2021-06-05 22:58:03,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-06-05 22:58:03,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:03,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-06-05 22:58:03,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=4879, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 22:58:03,237 INFO L87 Difference]: Start difference. First operand 554 states and 1145 transitions. Second operand has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:21,656 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-06-05 22:58:26,597 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-06-05 22:58:31,519 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-06-05 22:58:34,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:34,075 INFO L93 Difference]: Finished difference Result 7211 states and 14397 transitions. [2021-06-05 22:58:34,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 677 states. [2021-06-05 22:58:34,076 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-06-05 22:58:34,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:34,081 INFO L225 Difference]: With dead ends: 7211 [2021-06-05 22:58:34,081 INFO L226 Difference]: Without dead ends: 7207 [2021-06-05 22:58:34,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293222 ImplicationChecksByTransitivity, 28226.4ms TimeCoverageRelationStatistics Valid=133727, Invalid=429523, Unknown=0, NotChecked=0, Total=563250 [2021-06-05 22:58:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7207 states. [2021-06-05 22:58:34,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7207 to 462. [2021-06-05 22:58:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0867678958785247) internal successors, (962), 461 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) [2021-06-05 22:58:34,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 962 transitions. [2021-06-05 22:58:34,122 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 962 transitions. Word has length 108 [2021-06-05 22:58:34,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:34,122 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 962 transitions. [2021-06-05 22:58:34,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:34,122 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 962 transitions. [2021-06-05 22:58:34,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 22:58:34,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:34,123 INFO L554 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:34,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-05 22:58:34,323 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:34,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:34,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2071368959, now seen corresponding path program 70 times [2021-06-05 22:58:34,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:34,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110367233] [2021-06-05 22:58:34,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:34,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:34,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110367233] [2021-06-05 22:58:34,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110367233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:34,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897048274] [2021-06-05 22:58:34,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:34,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:58:34,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:34,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 99 conjunts are in the unsatisfiable core [2021-06-05 22:58:34,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:34,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897048274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:34,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:34,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2021-06-05 22:58:34,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927970062] [2021-06-05 22:58:34,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 22:58:34,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:34,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 22:58:34,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:58:34,919 INFO L87 Difference]: Start difference. First operand 462 states and 962 transitions. Second operand has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:35,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:35,611 INFO L93 Difference]: Finished difference Result 1460 states and 2883 transitions. [2021-06-05 22:58:35,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:58:35,611 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 22:58:35,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:35,612 INFO L225 Difference]: With dead ends: 1460 [2021-06-05 22:58:35,612 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 22:58:35,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 333.0ms TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:58:35,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 22:58:35,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 985. [2021-06-05 22:58:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 2.1615853658536586) internal successors, (2127), 984 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:35,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 2127 transitions. [2021-06-05 22:58:35,621 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 2127 transitions. Word has length 110 [2021-06-05 22:58:35,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:35,621 INFO L482 AbstractCegarLoop]: Abstraction has 985 states and 2127 transitions. [2021-06-05 22:58:35,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:35,621 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 2127 transitions. [2021-06-05 22:58:35,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-06-05 22:58:35,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:35,622 INFO L554 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:35,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:35,822 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:35,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:35,823 INFO L82 PathProgramCache]: Analyzing trace with hash -293975553, now seen corresponding path program 71 times [2021-06-05 22:58:35,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:35,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690044586] [2021-06-05 22:58:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:36,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:36,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690044586] [2021-06-05 22:58:36,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690044586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:36,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423131877] [2021-06-05 22:58:36,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:36,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-06-05 22:58:36,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:36,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 22:58:36,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:38,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423131877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:38,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:38,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 105 [2021-06-05 22:58:38,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697690294] [2021-06-05 22:58:38,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-06-05 22:58:38,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:38,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-06-05 22:58:38,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1861, Invalid=9269, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 22:58:38,998 INFO L87 Difference]: Start difference. First operand 985 states and 2127 transitions. Second operand has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:27,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:27,206 INFO L93 Difference]: Finished difference Result 11166 states and 22119 transitions. [2021-06-05 22:59:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 729 states. [2021-06-05 22:59:27,207 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-06-05 22:59:27,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:27,214 INFO L225 Difference]: With dead ends: 11166 [2021-06-05 22:59:27,214 INFO L226 Difference]: Without dead ends: 8958 [2021-06-05 22:59:27,238 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 829 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354186 ImplicationChecksByTransitivity, 37462.5ms TimeCoverageRelationStatistics Valid=197709, Invalid=492021, Unknown=0, NotChecked=0, Total=689730 [2021-06-05 22:59:27,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8958 states. [2021-06-05 22:59:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8958 to 576. [2021-06-05 22:59:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.071304347826087) internal successors, (1191), 575 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1191 transitions. [2021-06-05 22:59:27,264 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1191 transitions. Word has length 112 [2021-06-05 22:59:27,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:27,264 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1191 transitions. [2021-06-05 22:59:27,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:27,264 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1191 transitions. [2021-06-05 22:59:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-06-05 22:59:27,265 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:27,265 INFO L554 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:27,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:27,465 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:27,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:27,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1604407155, now seen corresponding path program 72 times [2021-06-05 22:59:27,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:27,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698810855] [2021-06-05 22:59:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:27,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:27,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:27,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698810855] [2021-06-05 22:59:27,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698810855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:27,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626488253] [2021-06-05 22:59:27,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:27,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-06-05 22:59:27,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:27,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 22:59:27,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:29,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626488253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:29,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:29,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 53] total 80 [2021-06-05 22:59:29,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046348218] [2021-06-05 22:59:29,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-06-05 22:59:29,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:29,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-06-05 22:59:29,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1211, Invalid=5269, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 22:59:29,784 INFO L87 Difference]: Start difference. First operand 576 states and 1191 transitions. Second operand has 81 states, 81 states have (on average 2.6419753086419755) internal successors, (214), 80 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:54,944 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-06-05 23:00:04,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:04,252 INFO L93 Difference]: Finished difference Result 7785 states and 15545 transitions. [2021-06-05 23:00:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 730 states. [2021-06-05 23:00:04,252 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.6419753086419755) internal successors, (214), 80 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-06-05 23:00:04,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:04,258 INFO L225 Difference]: With dead ends: 7785 [2021-06-05 23:00:04,259 INFO L226 Difference]: Without dead ends: 7781 [2021-06-05 23:00:04,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 805 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341817 ImplicationChecksByTransitivity, 31408.2ms TimeCoverageRelationStatistics Valid=154598, Invalid=495844, Unknown=0, NotChecked=0, Total=650442 [2021-06-05 23:00:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7781 states. [2021-06-05 23:00:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7781 to 480. [2021-06-05 23:00:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.0876826722338206) internal successors, (1000), 479 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1000 transitions. [2021-06-05 23:00:04,315 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1000 transitions. Word has length 112 [2021-06-05 23:00:04,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:04,315 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1000 transitions. [2021-06-05 23:00:04,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.6419753086419755) internal successors, (214), 80 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:04,316 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1000 transitions. [2021-06-05 23:00:04,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-06-05 23:00:04,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:04,316 INFO L554 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:04,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:04,517 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:04,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:04,517 INFO L82 PathProgramCache]: Analyzing trace with hash 34618557, now seen corresponding path program 73 times [2021-06-05 23:00:04,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:04,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707184639] [2021-06-05 23:00:04,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:04,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:04,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707184639] [2021-06-05 23:00:04,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707184639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:04,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896229071] [2021-06-05 23:00:04,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:05,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 103 conjunts are in the unsatisfiable core [2021-06-05 23:00:05,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:05,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896229071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:05,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:05,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-06-05 23:00:05,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737591516] [2021-06-05 23:00:05,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:00:05,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:05,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:00:05,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:00:05,211 INFO L87 Difference]: Start difference. First operand 480 states and 1000 transitions. Second operand has 28 states, 28 states have (on average 4.071428571428571) internal successors, (114), 28 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:05,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:05,974 INFO L93 Difference]: Finished difference Result 1519 states and 3000 transitions. [2021-06-05 23:00:05,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:00:05,974 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.071428571428571) internal successors, (114), 28 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-06-05 23:00:05,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:05,976 INFO L225 Difference]: With dead ends: 1519 [2021-06-05 23:00:05,976 INFO L226 Difference]: Without dead ends: 1354 [2021-06-05 23:00:05,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:00:05,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-05 23:00:05,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1025. [2021-06-05 23:00:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 2.162109375) internal successors, (2214), 1024 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 2214 transitions. [2021-06-05 23:00:05,985 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 2214 transitions. Word has length 114 [2021-06-05 23:00:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:05,985 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 2214 transitions. [2021-06-05 23:00:05,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.071428571428571) internal successors, (114), 28 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:05,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 2214 transitions. [2021-06-05 23:00:05,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-06-05 23:00:05,986 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:05,986 INFO L554 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:06,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 23:00:06,187 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:06,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:06,187 INFO L82 PathProgramCache]: Analyzing trace with hash 979201211, now seen corresponding path program 74 times [2021-06-05 23:00:06,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:06,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003789032] [2021-06-05 23:00:06,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:07,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:07,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003789032] [2021-06-05 23:00:07,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003789032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:07,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251050207] [2021-06-05 23:00:07,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:07,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:00:07,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:07,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 23:00:07,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:09,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251050207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:09,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:09,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 109 [2021-06-05 23:00:09,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914312330] [2021-06-05 23:00:09,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-06-05 23:00:09,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:09,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-06-05 23:00:09,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2000, Invalid=9990, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 23:00:09,580 INFO L87 Difference]: Start difference. First operand 1025 states and 2214 transitions. Second operand has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 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) [2021-06-05 23:00:41,753 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 18 Received shutdown request... [2021-06-05 23:00:42,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 541 states. [2021-06-05 23:00:42,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:42,532 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:00:42,534 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:00:42,535 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:00:42,536 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:00:42 BasicIcfg [2021-06-05 23:00:42,536 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:00:42,536 INFO L168 Benchmark]: Toolchain (without parser) took 729725.05 ms. Allocated memory was 379.6 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 358.8 MB in the beginning and 1.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 617.8 MB. Max. memory is 16.0 GB. [2021-06-05 23:00:42,536 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 379.6 MB. Free memory was 359.8 MB in the beginning and 359.8 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:00:42,536 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.12 ms. Allocated memory is still 379.6 MB. Free memory was 358.7 MB in the beginning and 357.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:00:42,536 INFO L168 Benchmark]: Boogie Preprocessor took 16.62 ms. Allocated memory is still 379.6 MB. Free memory was 357.2 MB in the beginning and 356.3 MB in the end (delta: 910.9 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 23:00:42,536 INFO L168 Benchmark]: RCFGBuilder took 306.36 ms. Allocated memory is still 379.6 MB. Free memory was 356.2 MB in the beginning and 344.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 23:00:42,537 INFO L168 Benchmark]: TraceAbstraction took 729368.53 ms. Allocated memory was 379.6 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 344.3 MB in the beginning and 1.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 601.0 MB. Max. memory is 16.0 GB. [2021-06-05 23:00:42,537 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 0.13 ms. Allocated memory is still 379.6 MB. Free memory was 359.8 MB in the beginning and 359.8 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.12 ms. Allocated memory is still 379.6 MB. Free memory was 358.7 MB in the beginning and 357.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.62 ms. Allocated memory is still 379.6 MB. Free memory was 357.2 MB in the beginning and 356.3 MB in the end (delta: 910.9 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 306.36 ms. Allocated memory is still 379.6 MB. Free memory was 356.2 MB in the beginning and 344.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 729368.53 ms. Allocated memory was 379.6 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 344.3 MB in the beginning and 1.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 601.0 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 Cancelled while BasicCegarLoop was constructing difference of abstraction (1025states) and FLOYD_HOARE automaton (currently 541 states, 110 states before enhancement),while ReachableStatesComputation was computing reachable states (6790 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 729251.6ms, OverallIterations: 77, TraceHistogramMax: 26, EmptinessCheckTime: 59.5ms, AutomataDifference: 639611.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6810 SDtfs, 48747 SDslu, 128237 SDs, 0 SdLazy, 135078 SolverSat, 6205 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61331.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21343 GetRequests, 4153 SyntacticMatches, 50 SemanticMatches, 17140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4253488 ImplicationChecksByTransitivity, 554860.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1025occurred in iteration=76, InterpolantAutomatonStates: 14274, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 875.2ms AutomataMinimizationTime, 76 MinimizatonAttempts, 150437 StatesRemovedByMinimization, 76 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 436.8ms SsaConstructionTime, 2050.3ms SatisfiabilityAnalysisTime, 68286.5ms InterpolantComputationTime, 9930 NumberOfCodeBlocks, 9930 NumberOfCodeBlocksAsserted, 704 NumberOfCheckSat, 9778 ConstructedInterpolants, 0 QuantifiedInterpolants, 71198 SizeOfPredicates, 225 NumberOfNonLiveVariables, 12800 ConjunctsInSsa, 2875 ConjunctsInUnsatCore, 152 InterpolantComputations, 2 PerfectInterpolantSequences, 21499/66401 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