/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_25x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 05:44:49,661 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 05:44:49,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:44:49,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:44:49,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:44:49,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:44:49,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:44:49,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:44:49,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:44:49,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:44:49,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:44:49,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:44:49,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:44:49,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:44:49,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 05:44:49,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:44:49,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:44:49,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:44:49,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 05:44:49,722 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:44:49,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:44:49,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:44:49,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:44:49,724 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:44:49,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:44:49,724 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:44:49,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:44:49,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:44:49,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:44:49,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:44:49,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:44:49,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:44:49,725 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:44:49,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:44:49,726 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:44:49,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:44:49,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:44:49,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:44:49,727 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:44:49,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:44:49,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:44:49,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:44:49,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:44:49,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:44:49,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:44:49,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:44:49,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:44:49,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:44:49,728 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 05:44:49,992 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:44:50,009 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:44:50,012 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:44:50,014 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:44:50,014 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:44:50,016 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_25x0-1.c [2020-07-20 05:44:50,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04373f47b/d2bf4edb26d54c898c11384c3a192925/FLAG3f056a7b6 [2020-07-20 05:44:50,509 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:44:50,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_25x0-1.c [2020-07-20 05:44:50,516 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04373f47b/d2bf4edb26d54c898c11384c3a192925/FLAG3f056a7b6 [2020-07-20 05:44:50,893 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04373f47b/d2bf4edb26d54c898c11384c3a192925 [2020-07-20 05:44:50,901 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:44:50,905 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:44:50,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:44:50,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:44:50,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:44:50,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:44:50" (1/1) ... [2020-07-20 05:44:50,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61675e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:50, skipping insertion in model container [2020-07-20 05:44:50,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:44:50" (1/1) ... [2020-07-20 05:44:50,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:44:50,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:44:51,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:44:51,151 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:44:51,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:44:51,179 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:44:51,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:51 WrapperNode [2020-07-20 05:44:51,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:44:51,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:44:51,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:44:51,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:44:51,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:51" (1/1) ... [2020-07-20 05:44:51,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:51" (1/1) ... [2020-07-20 05:44:51,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:51" (1/1) ... [2020-07-20 05:44:51,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:51" (1/1) ... [2020-07-20 05:44:51,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:51" (1/1) ... [2020-07-20 05:44:51,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:51" (1/1) ... [2020-07-20 05:44:51,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:51" (1/1) ... [2020-07-20 05:44:51,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:44:51,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:44:51,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:44:51,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:44:51,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:51" (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 [2020-07-20 05:44:51,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:44:51,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:44:51,351 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-20 05:44:51,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:44:51,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:44:51,351 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-20 05:44:51,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:44:51,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:44:51,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:44:51,515 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:44:51,515 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 05:44:51,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:44:51 BoogieIcfgContainer [2020-07-20 05:44:51,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:44:51,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:44:51,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:44:51,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:44:51,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:44:50" (1/3) ... [2020-07-20 05:44:51,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e068ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:44:51, skipping insertion in model container [2020-07-20 05:44:51,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:51" (2/3) ... [2020-07-20 05:44:51,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e068ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:44:51, skipping insertion in model container [2020-07-20 05:44:51,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:44:51" (3/3) ... [2020-07-20 05:44:51,527 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_25x0-1.c [2020-07-20 05:44:51,534 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:44:51,539 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:44:51,552 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:44:51,577 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:44:51,577 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:44:51,577 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:44:51,578 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:44:51,578 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:44:51,579 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:44:51,579 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:44:51,579 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:44:51,598 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 05:44:51,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 05:44:51,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:51,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:51,605 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:51,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:51,610 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-20 05:44:51,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:51,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142534703] [2020-07-20 05:44:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:44:51,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:44:51,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142534703] [2020-07-20 05:44:51,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:44:51,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 05:44:51,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954661229] [2020-07-20 05:44:51,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 05:44:51,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:51,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 05:44:51,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 05:44:51,832 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 05:44:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:51,968 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 05:44:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 05:44:51,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 05:44:51,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:51,980 INFO L225 Difference]: With dead ends: 30 [2020-07-20 05:44:51,981 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 05:44:51,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:44:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 05:44:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 05:44:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 05:44:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 05:44:52,027 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 05:44:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:52,028 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 05:44:52,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 05:44:52,028 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 05:44:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 05:44:52,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:52,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:52,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 05:44:52,031 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:52,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:52,032 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-20 05:44:52,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:52,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901947120] [2020-07-20 05:44:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:44:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 05:44:52,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901947120] [2020-07-20 05:44:52,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650547715] [2020-07-20 05:44:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@655a0e3f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:52,219 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@655a0e3f issued 2 check-sat command(s) [2020-07-20 05:44:52,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:52,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 05:44:52,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 05:44:52,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:52,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-20 05:44:52,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897945867] [2020-07-20 05:44:52,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 05:44:52,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:52,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 05:44:52,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 05:44:52,287 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-20 05:44:52,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:52,351 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 05:44:52,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 05:44:52,354 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-20 05:44:52,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:52,355 INFO L225 Difference]: With dead ends: 25 [2020-07-20 05:44:52,355 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 05:44:52,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-20 05:44:52,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 05:44:52,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 05:44:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 05:44:52,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 05:44:52,363 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 05:44:52,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:52,364 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 05:44:52,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 05:44:52,364 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 05:44:52,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 05:44:52,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:52,366 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:52,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 05:44:52,581 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:52,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:52,582 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-20 05:44:52,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:52,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842689922] [2020-07-20 05:44:52,583 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:44:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 05:44:52,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842689922] [2020-07-20 05:44:52,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025635929] [2020-07-20 05:44:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@25cb39c 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 [2020-07-20 05:44:52,760 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@25cb39c issued 2 check-sat command(s) [2020-07-20 05:44:52,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:52,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 05:44:52,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 05:44:52,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:52,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-20 05:44:52,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860700899] [2020-07-20 05:44:52,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 05:44:52,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:52,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 05:44:52,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 05:44:52,798 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-20 05:44:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:52,872 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 05:44:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 05:44:52,872 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-20 05:44:52,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:52,874 INFO L225 Difference]: With dead ends: 28 [2020-07-20 05:44:52,874 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 05:44:52,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:44:52,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 05:44:52,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 05:44:52,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 05:44:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 05:44:52,882 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 05:44:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:52,882 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 05:44:52,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 05:44:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 05:44:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 05:44:52,884 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:52,884 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:53,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:53,098 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:53,099 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-20 05:44:53,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:53,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315527804] [2020-07-20 05:44:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:44:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 05:44:53,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315527804] [2020-07-20 05:44:53,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835386898] [2020-07-20 05:44:53,329 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39b2b569 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:53,362 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39b2b569 issued 2 check-sat command(s) [2020-07-20 05:44:53,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:53,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 05:44:53,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 05:44:53,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:53,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-20 05:44:53,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196428651] [2020-07-20 05:44:53,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 05:44:53,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:53,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 05:44:53,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 05:44:53,395 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-20 05:44:53,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:53,468 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 05:44:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 05:44:53,469 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-20 05:44:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:53,470 INFO L225 Difference]: With dead ends: 31 [2020-07-20 05:44:53,470 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 05:44:53,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-20 05:44:53,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 05:44:53,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 05:44:53,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 05:44:53,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 05:44:53,477 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 05:44:53,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:53,478 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 05:44:53,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 05:44:53,478 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 05:44:53,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 05:44:53,479 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:53,480 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:53,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:53,694 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:53,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:53,695 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-20 05:44:53,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:53,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472515795] [2020-07-20 05:44:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:44:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 05:44:53,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472515795] [2020-07-20 05:44:53,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30252781] [2020-07-20 05:44:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2c22cb 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 [2020-07-20 05:44:53,881 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2c22cb issued 2 check-sat command(s) [2020-07-20 05:44:53,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:53,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 05:44:53,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 05:44:53,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:53,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-20 05:44:53,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991099370] [2020-07-20 05:44:53,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 05:44:53,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:53,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 05:44:53,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 05:44:53,913 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-20 05:44:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:54,007 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 05:44:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 05:44:54,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-20 05:44:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:54,009 INFO L225 Difference]: With dead ends: 34 [2020-07-20 05:44:54,009 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 05:44:54,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:44:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 05:44:54,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 05:44:54,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 05:44:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 05:44:54,016 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 05:44:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:54,017 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 05:44:54,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 05:44:54,017 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 05:44:54,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 05:44:54,018 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:54,018 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:54,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:54,233 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:54,234 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-20 05:44:54,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:54,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852896450] [2020-07-20 05:44:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:44:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 05:44:54,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852896450] [2020-07-20 05:44:54,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124818281] [2020-07-20 05:44:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34d9db37 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:54,451 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34d9db37 issued 2 check-sat command(s) [2020-07-20 05:44:54,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:54,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 05:44:54,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 05:44:54,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:54,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-20 05:44:54,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569384838] [2020-07-20 05:44:54,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 05:44:54,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:54,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 05:44:54,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:44:54,506 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-20 05:44:54,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:54,593 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 05:44:54,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 05:44:54,594 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-20 05:44:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:54,595 INFO L225 Difference]: With dead ends: 37 [2020-07-20 05:44:54,595 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 05:44:54,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-07-20 05:44:54,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 05:44:54,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 05:44:54,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 05:44:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 05:44:54,602 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 05:44:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:54,603 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 05:44:54,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 05:44:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 05:44:54,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 05:44:54,605 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:54,605 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:54,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 05:44:54,819 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:54,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:54,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-20 05:44:54,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:54,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709803065] [2020-07-20 05:44:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:44:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 05:44:54,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709803065] [2020-07-20 05:44:54,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174188653] [2020-07-20 05:44:54,999 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b020d88 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 [2020-07-20 05:44:55,035 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b020d88 issued 2 check-sat command(s) [2020-07-20 05:44:55,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:55,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 05:44:55,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 05:44:55,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:55,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-20 05:44:55,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56295881] [2020-07-20 05:44:55,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 05:44:55,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:55,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 05:44:55,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-20 05:44:55,073 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-20 05:44:55,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:55,177 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 05:44:55,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 05:44:55,178 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-20 05:44:55,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:55,179 INFO L225 Difference]: With dead ends: 40 [2020-07-20 05:44:55,179 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 05:44:55,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-20 05:44:55,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 05:44:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 05:44:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 05:44:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 05:44:55,186 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 05:44:55,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:55,187 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 05:44:55,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 05:44:55,187 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 05:44:55,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 05:44:55,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:55,188 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:55,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:55,402 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:55,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:55,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-20 05:44:55,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:55,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219874840] [2020-07-20 05:44:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:44:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 05:44:55,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219874840] [2020-07-20 05:44:55,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948851775] [2020-07-20 05:44:55,647 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a951a12 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:55,716 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a951a12 issued 2 check-sat command(s) [2020-07-20 05:44:55,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:55,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 05:44:55,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 05:44:55,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:55,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-20 05:44:55,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130996818] [2020-07-20 05:44:55,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 05:44:55,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:55,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 05:44:55,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-20 05:44:55,783 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-20 05:44:55,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:55,919 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 05:44:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 05:44:55,920 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-20 05:44:55,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:55,923 INFO L225 Difference]: With dead ends: 43 [2020-07-20 05:44:55,923 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 05:44:55,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-07-20 05:44:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 05:44:55,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 05:44:55,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 05:44:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 05:44:55,933 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 05:44:55,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:55,933 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 05:44:55,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 05:44:55,934 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 05:44:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 05:44:55,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:55,937 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:56,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:56,152 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:56,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:56,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-20 05:44:56,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:56,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675456886] [2020-07-20 05:44:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:44:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 05:44:56,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675456886] [2020-07-20 05:44:56,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387386749] [2020-07-20 05:44:56,406 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@67824878 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 [2020-07-20 05:44:56,445 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@67824878 issued 2 check-sat command(s) [2020-07-20 05:44:56,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:56,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 05:44:56,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 05:44:56,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:56,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-20 05:44:56,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811207636] [2020-07-20 05:44:56,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 05:44:56,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:56,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 05:44:56,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-20 05:44:56,497 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-20 05:44:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:56,671 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 05:44:56,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 05:44:56,671 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-20 05:44:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:56,673 INFO L225 Difference]: With dead ends: 46 [2020-07-20 05:44:56,673 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 05:44:56,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-07-20 05:44:56,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 05:44:56,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 05:44:56,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 05:44:56,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 05:44:56,680 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 05:44:56,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:56,681 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 05:44:56,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 05:44:56,681 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 05:44:56,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 05:44:56,682 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:56,682 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:56,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 05:44:56,897 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:56,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:56,898 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-20 05:44:56,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:56,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702023226] [2020-07-20 05:44:56,900 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:44:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 05:44:57,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702023226] [2020-07-20 05:44:57,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644608924] [2020-07-20 05:44:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2695424 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:57,231 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2695424 issued 2 check-sat command(s) [2020-07-20 05:44:57,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:57,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 05:44:57,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 05:44:57,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:57,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-20 05:44:57,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368939349] [2020-07-20 05:44:57,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 05:44:57,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:57,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 05:44:57,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:44:57,269 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-20 05:44:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:57,417 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 05:44:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 05:44:57,417 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-20 05:44:57,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:57,419 INFO L225 Difference]: With dead ends: 49 [2020-07-20 05:44:57,422 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 05:44:57,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-07-20 05:44:57,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 05:44:57,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 05:44:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 05:44:57,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 05:44:57,434 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 05:44:57,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:57,436 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 05:44:57,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 05:44:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 05:44:57,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 05:44:57,438 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:57,438 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:57,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:57,639 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:57,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-20 05:44:57,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:57,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630601531] [2020-07-20 05:44:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:44:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 05:44:58,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630601531] [2020-07-20 05:44:58,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165107946] [2020-07-20 05:44:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@33048e9 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 [2020-07-20 05:44:58,042 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@33048e9 issued 2 check-sat command(s) [2020-07-20 05:44:58,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:58,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 05:44:58,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 05:44:58,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:58,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-07-20 05:44:58,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032348166] [2020-07-20 05:44:58,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 05:44:58,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:58,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 05:44:58,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 05:44:58,088 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-07-20 05:44:58,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:58,274 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-20 05:44:58,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 05:44:58,275 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-07-20 05:44:58,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:58,277 INFO L225 Difference]: With dead ends: 52 [2020-07-20 05:44:58,277 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 05:44:58,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-07-20 05:44:58,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 05:44:58,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 05:44:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 05:44:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-20 05:44:58,293 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-20 05:44:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:58,294 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-20 05:44:58,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 05:44:58,296 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-20 05:44:58,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 05:44:58,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:58,297 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:58,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:58,512 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:58,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:58,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-20 05:44:58,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:58,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821446402] [2020-07-20 05:44:58,514 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:44:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 05:44:58,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821446402] [2020-07-20 05:44:58,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966581388] [2020-07-20 05:44:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1b92a08e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:58,973 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1b92a08e issued 2 check-sat command(s) [2020-07-20 05:44:58,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:58,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 05:44:58,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 05:44:59,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:59,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-07-20 05:44:59,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761213134] [2020-07-20 05:44:59,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 05:44:59,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:59,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 05:44:59,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-20 05:44:59,025 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2020-07-20 05:44:59,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:59,210 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-20 05:44:59,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 05:44:59,211 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-07-20 05:44:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:59,213 INFO L225 Difference]: With dead ends: 55 [2020-07-20 05:44:59,213 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 05:44:59,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-07-20 05:44:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 05:44:59,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 05:44:59,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 05:44:59,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-20 05:44:59,229 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-20 05:44:59,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:59,230 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-20 05:44:59,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 05:44:59,230 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-20 05:44:59,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 05:44:59,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:59,233 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:59,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 05:44:59,447 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:59,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:59,447 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-07-20 05:44:59,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:59,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216054775] [2020-07-20 05:44:59,448 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:44:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 05:44:59,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216054775] [2020-07-20 05:44:59,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96213878] [2020-07-20 05:44:59,911 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7ac620c5 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 [2020-07-20 05:44:59,980 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7ac620c5 issued 2 check-sat command(s) [2020-07-20 05:44:59,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:59,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 05:44:59,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 05:45:00,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:00,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-07-20 05:45:00,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623367183] [2020-07-20 05:45:00,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 05:45:00,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:00,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 05:45:00,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-20 05:45:00,034 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-07-20 05:45:00,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:00,249 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-20 05:45:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 05:45:00,250 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-07-20 05:45:00,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:00,251 INFO L225 Difference]: With dead ends: 58 [2020-07-20 05:45:00,251 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 05:45:00,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-07-20 05:45:00,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 05:45:00,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-20 05:45:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 05:45:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-20 05:45:00,258 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-20 05:45:00,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:00,258 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-20 05:45:00,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 05:45:00,259 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-20 05:45:00,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-20 05:45:00,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:00,260 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:45:00,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 05:45:00,473 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:00,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-07-20 05:45:00,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:00,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93942070] [2020-07-20 05:45:00,474 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:45:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 05:45:00,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93942070] [2020-07-20 05:45:00,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752146340] [2020-07-20 05:45:00,943 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29f072f6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:00,991 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29f072f6 issued 2 check-sat command(s) [2020-07-20 05:45:00,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:45:00,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 05:45:00,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 05:45:01,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:01,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-07-20 05:45:01,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788999101] [2020-07-20 05:45:01,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 05:45:01,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 05:45:01,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-20 05:45:01,030 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 19 states. [2020-07-20 05:45:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:01,216 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-20 05:45:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 05:45:01,217 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-07-20 05:45:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:01,218 INFO L225 Difference]: With dead ends: 61 [2020-07-20 05:45:01,218 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 05:45:01,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 05:45:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 05:45:01,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 05:45:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 05:45:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-20 05:45:01,232 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-20 05:45:01,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:01,233 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-20 05:45:01,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 05:45:01,233 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-20 05:45:01,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-20 05:45:01,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:01,234 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:45:01,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 05:45:01,435 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-07-20 05:45:01,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:01,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593928619] [2020-07-20 05:45:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:45:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 05:45:01,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593928619] [2020-07-20 05:45:01,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271743176] [2020-07-20 05:45:01,972 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a721be 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 [2020-07-20 05:45:02,042 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a721be issued 2 check-sat command(s) [2020-07-20 05:45:02,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:45:02,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 05:45:02,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 05:45:02,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:02,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-07-20 05:45:02,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682879475] [2020-07-20 05:45:02,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 05:45:02,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:02,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 05:45:02,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-20 05:45:02,112 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2020-07-20 05:45:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:02,404 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-20 05:45:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 05:45:02,405 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-07-20 05:45:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:02,406 INFO L225 Difference]: With dead ends: 64 [2020-07-20 05:45:02,406 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 05:45:02,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 05:45:02,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 05:45:02,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 05:45:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 05:45:02,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-20 05:45:02,421 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-20 05:45:02,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:02,423 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-20 05:45:02,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 05:45:02,423 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-20 05:45:02,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-20 05:45:02,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:02,426 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:45:02,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:02,639 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:02,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:02,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-07-20 05:45:02,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:02,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503789400] [2020-07-20 05:45:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:45:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 05:45:03,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503789400] [2020-07-20 05:45:03,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159077313] [2020-07-20 05:45:03,318 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@488d079c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:03,375 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@488d079c issued 2 check-sat command(s) [2020-07-20 05:45:03,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:45:03,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-20 05:45:03,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 05:45:03,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:03,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-07-20 05:45:03,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996233388] [2020-07-20 05:45:03,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 05:45:03,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:03,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 05:45:03,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-20 05:45:03,435 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 21 states. [2020-07-20 05:45:03,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:03,661 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-20 05:45:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 05:45:03,661 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-07-20 05:45:03,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:03,662 INFO L225 Difference]: With dead ends: 67 [2020-07-20 05:45:03,663 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 05:45:03,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 05:45:03,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 05:45:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-20 05:45:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 05:45:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-20 05:45:03,671 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-20 05:45:03,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:03,672 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-20 05:45:03,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 05:45:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-20 05:45:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 05:45:03,673 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:03,673 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:45:03,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 05:45:03,886 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:03,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:03,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-07-20 05:45:03,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:03,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385599674] [2020-07-20 05:45:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:45:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-20 05:45:04,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385599674] [2020-07-20 05:45:04,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564863403] [2020-07-20 05:45:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1953a6ff 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 [2020-07-20 05:45:04,606 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1953a6ff issued 2 check-sat command(s) [2020-07-20 05:45:04,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:45:04,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-20 05:45:04,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-20 05:45:04,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:04,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-07-20 05:45:04,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963681611] [2020-07-20 05:45:04,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 05:45:04,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:04,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 05:45:04,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-07-20 05:45:04,670 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 22 states. [2020-07-20 05:45:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:05,008 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-07-20 05:45:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 05:45:05,009 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2020-07-20 05:45:05,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:05,010 INFO L225 Difference]: With dead ends: 70 [2020-07-20 05:45:05,010 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 05:45:05,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 05:45:05,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 05:45:05,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-20 05:45:05,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 05:45:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-07-20 05:45:05,016 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-07-20 05:45:05,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:05,017 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-07-20 05:45:05,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 05:45:05,017 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-07-20 05:45:05,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-20 05:45:05,018 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:05,018 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:45:05,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 05:45:05,219 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:05,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-07-20 05:45:05,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:05,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322238359] [2020-07-20 05:45:05,220 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:45:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-20 05:45:05,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322238359] [2020-07-20 05:45:05,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110495109] [2020-07-20 05:45:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@10e244ca No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:06,002 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@10e244ca issued 2 check-sat command(s) [2020-07-20 05:45:06,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:45:06,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-20 05:45:06,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-20 05:45:06,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:06,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-07-20 05:45:06,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672639264] [2020-07-20 05:45:06,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 05:45:06,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:06,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 05:45:06,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-07-20 05:45:06,094 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 23 states. [2020-07-20 05:45:06,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:06,372 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-20 05:45:06,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 05:45:06,373 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 115 [2020-07-20 05:45:06,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:06,374 INFO L225 Difference]: With dead ends: 73 [2020-07-20 05:45:06,374 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 05:45:06,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 05:45:06,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 05:45:06,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-20 05:45:06,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 05:45:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-20 05:45:06,380 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-07-20 05:45:06,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:06,381 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-20 05:45:06,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 05:45:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-20 05:45:06,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 05:45:06,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:06,382 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:45:06,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 05:45:06,596 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:06,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:06,597 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-07-20 05:45:06,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:06,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040823887] [2020-07-20 05:45:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:45:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-20 05:45:07,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040823887] [2020-07-20 05:45:07,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832261331] [2020-07-20 05:45:07,362 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@709107b 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 [2020-07-20 05:45:07,424 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@709107b issued 2 check-sat command(s) [2020-07-20 05:45:07,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:45:07,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-20 05:45:07,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-20 05:45:07,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:07,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-07-20 05:45:07,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194655480] [2020-07-20 05:45:07,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 05:45:07,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:07,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 05:45:07,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-07-20 05:45:07,482 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 24 states. [2020-07-20 05:45:07,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:07,781 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-20 05:45:07,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 05:45:07,781 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2020-07-20 05:45:07,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:07,783 INFO L225 Difference]: With dead ends: 76 [2020-07-20 05:45:07,784 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 05:45:07,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 05:45:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 05:45:07,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-07-20 05:45:07,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 05:45:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-20 05:45:07,790 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-07-20 05:45:07,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:07,791 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-20 05:45:07,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 05:45:07,791 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-20 05:45:07,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-20 05:45:07,792 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:07,793 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:45:07,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:07,994 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:07,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:07,994 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-07-20 05:45:07,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:07,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420259600] [2020-07-20 05:45:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:45:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-20 05:45:08,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420259600] [2020-07-20 05:45:08,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015909358] [2020-07-20 05:45:08,931 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52512720 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:09,022 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52512720 issued 2 check-sat command(s) [2020-07-20 05:45:09,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:45:09,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-20 05:45:09,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-20 05:45:09,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:09,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-07-20 05:45:09,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886497093] [2020-07-20 05:45:09,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 05:45:09,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:09,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 05:45:09,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-07-20 05:45:09,100 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 25 states. [2020-07-20 05:45:09,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:09,518 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-07-20 05:45:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 05:45:09,519 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 127 [2020-07-20 05:45:09,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:09,521 INFO L225 Difference]: With dead ends: 79 [2020-07-20 05:45:09,524 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 05:45:09,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 05:45:09,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 05:45:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-20 05:45:09,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 05:45:09,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-07-20 05:45:09,538 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-07-20 05:45:09,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:09,539 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-07-20 05:45:09,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 05:45:09,539 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-07-20 05:45:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-20 05:45:09,542 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:09,542 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:45:09,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:09,758 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:09,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-07-20 05:45:09,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:09,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524758474] [2020-07-20 05:45:09,760 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:45:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-20 05:45:10,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524758474] [2020-07-20 05:45:10,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103705859] [2020-07-20 05:45:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49aaaae2 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 [2020-07-20 05:45:10,787 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49aaaae2 issued 2 check-sat command(s) [2020-07-20 05:45:10,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:45:10,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-20 05:45:10,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-20 05:45:10,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:10,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-07-20 05:45:10,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033462673] [2020-07-20 05:45:10,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 05:45:10,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:10,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 05:45:10,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-07-20 05:45:10,858 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 26 states. [2020-07-20 05:45:11,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:11,191 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-07-20 05:45:11,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 05:45:11,192 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 133 [2020-07-20 05:45:11,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:11,193 INFO L225 Difference]: With dead ends: 82 [2020-07-20 05:45:11,193 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 05:45:11,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=785, Invalid=1377, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 05:45:11,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 05:45:11,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-20 05:45:11,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 05:45:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-07-20 05:45:11,199 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-07-20 05:45:11,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:11,200 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-07-20 05:45:11,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 05:45:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-07-20 05:45:11,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-20 05:45:11,201 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:11,201 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:45:11,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-20 05:45:11,416 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:11,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1648275844, now seen corresponding path program 21 times [2020-07-20 05:45:11,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:11,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172031050] [2020-07-20 05:45:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:45:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-20 05:45:12,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172031050] [2020-07-20 05:45:12,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203119058] [2020-07-20 05:45:12,430 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@64e350ad No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:12,491 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@64e350ad issued 2 check-sat command(s) [2020-07-20 05:45:12,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:45:12,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-20 05:45:12,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-20 05:45:12,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:12,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-07-20 05:45:12,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436666222] [2020-07-20 05:45:12,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 05:45:12,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:12,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 05:45:12,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2020-07-20 05:45:12,569 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 27 states. [2020-07-20 05:45:12,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:12,916 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-07-20 05:45:12,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 05:45:12,919 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 139 [2020-07-20 05:45:12,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:12,920 INFO L225 Difference]: With dead ends: 85 [2020-07-20 05:45:12,920 INFO L226 Difference]: Without dead ends: 81 [2020-07-20 05:45:12,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=855, Invalid=1497, Unknown=0, NotChecked=0, Total=2352 [2020-07-20 05:45:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-20 05:45:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-07-20 05:45:12,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 05:45:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-07-20 05:45:12,932 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-07-20 05:45:12,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:12,932 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-07-20 05:45:12,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 05:45:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-07-20 05:45:12,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-07-20 05:45:12,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:12,935 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:45:13,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-20 05:45:13,146 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:13,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1314278308, now seen corresponding path program 22 times [2020-07-20 05:45:13,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:13,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573539449] [2020-07-20 05:45:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:45:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-07-20 05:45:14,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573539449] [2020-07-20 05:45:14,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32196500] [2020-07-20 05:45:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3b1d4b94 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 [2020-07-20 05:45:14,239 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3b1d4b94 issued 2 check-sat command(s) [2020-07-20 05:45:14,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:45:14,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-20 05:45:14,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-07-20 05:45:14,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:14,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-07-20 05:45:14,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671728564] [2020-07-20 05:45:14,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 05:45:14,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:14,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 05:45:14,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2020-07-20 05:45:14,303 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 28 states. [2020-07-20 05:45:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:14,669 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-07-20 05:45:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 05:45:14,670 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 145 [2020-07-20 05:45:14,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:14,671 INFO L225 Difference]: With dead ends: 88 [2020-07-20 05:45:14,672 INFO L226 Difference]: Without dead ends: 84 [2020-07-20 05:45:14,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=928, Invalid=1622, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 05:45:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-20 05:45:14,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-07-20 05:45:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-20 05:45:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-07-20 05:45:14,678 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-07-20 05:45:14,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:14,678 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-07-20 05:45:14,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 05:45:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-07-20 05:45:14,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-20 05:45:14,679 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:14,679 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:45:14,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:14,889 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:14,890 INFO L82 PathProgramCache]: Analyzing trace with hash 2015638980, now seen corresponding path program 23 times [2020-07-20 05:45:14,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:14,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089999606] [2020-07-20 05:45:14,891 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:45:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-07-20 05:45:16,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089999606] [2020-07-20 05:45:16,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499648109] [2020-07-20 05:45:16,059 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@576a7818 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:16,129 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@576a7818 issued 2 check-sat command(s) [2020-07-20 05:45:16,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:45:16,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-20 05:45:16,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-07-20 05:45:16,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:16,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-07-20 05:45:16,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706288355] [2020-07-20 05:45:16,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 05:45:16,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:16,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 05:45:16,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2020-07-20 05:45:16,193 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 29 states. [2020-07-20 05:45:16,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:16,537 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-07-20 05:45:16,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 05:45:16,538 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 151 [2020-07-20 05:45:16,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:16,540 INFO L225 Difference]: With dead ends: 91 [2020-07-20 05:45:16,540 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 05:45:16,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1004, Invalid=1752, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 05:45:16,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 05:45:16,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-07-20 05:45:16,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 05:45:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-07-20 05:45:16,545 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-07-20 05:45:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:16,546 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-07-20 05:45:16,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 05:45:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-07-20 05:45:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-20 05:45:16,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:16,548 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:45:16,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-20 05:45:16,761 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:16,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:16,761 INFO L82 PathProgramCache]: Analyzing trace with hash 483163804, now seen corresponding path program 24 times [2020-07-20 05:45:16,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:16,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006942830] [2020-07-20 05:45:16,762 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:45:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-07-20 05:45:17,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006942830] [2020-07-20 05:45:17,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963405740] [2020-07-20 05:45:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1489b321 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 [2020-07-20 05:45:18,028 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1489b321 issued 2 check-sat command(s) [2020-07-20 05:45:18,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:45:18,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 52 conjunts are in the unsatisfiable core [2020-07-20 05:45:18,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-07-20 05:45:18,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:18,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-07-20 05:45:18,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002262066] [2020-07-20 05:45:18,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 05:45:18,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:18,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 05:45:18,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2020-07-20 05:45:18,092 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 30 states. [2020-07-20 05:45:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:18,518 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-07-20 05:45:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 05:45:18,519 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 157 [2020-07-20 05:45:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:18,521 INFO L225 Difference]: With dead ends: 94 [2020-07-20 05:45:18,521 INFO L226 Difference]: Without dead ends: 90 [2020-07-20 05:45:18,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1083, Invalid=1887, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 05:45:18,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-20 05:45:18,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-07-20 05:45:18,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 05:45:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-07-20 05:45:18,527 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-07-20 05:45:18,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:18,528 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-07-20 05:45:18,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 05:45:18,528 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-07-20 05:45:18,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-20 05:45:18,530 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:18,530 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:45:18,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:18,745 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:18,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:18,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1060706820, now seen corresponding path program 25 times [2020-07-20 05:45:18,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:18,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306605575] [2020-07-20 05:45:18,747 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-20 05:45:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 924 proven. 50 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2020-07-20 05:45:22,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306605575] [2020-07-20 05:45:22,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599357434] [2020-07-20 05:45:22,127 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5adbb2d6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:45:22,210 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5adbb2d6 issued 4 check-sat command(s) [2020-07-20 05:45:22,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:45:22,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-20 05:45:22,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:45:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 49 proven. 950 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2020-07-20 05:45:26,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:45:26,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 59] total 114 [2020-07-20 05:45:26,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26895575] [2020-07-20 05:45:26,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-07-20 05:45:26,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:26,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-07-20 05:45:26,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=840, Invalid=12042, Unknown=0, NotChecked=0, Total=12882 [2020-07-20 05:45:26,888 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 114 states. [2020-07-20 05:45:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:35,039 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-07-20 05:45:35,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-07-20 05:45:35,040 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 163 [2020-07-20 05:45:35,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:35,041 INFO L225 Difference]: With dead ends: 93 [2020-07-20 05:45:35,041 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 05:45:35,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5271 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1962, Invalid=25760, Unknown=0, NotChecked=0, Total=27722 [2020-07-20 05:45:35,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 05:45:35,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 05:45:35,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 05:45:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 05:45:35,049 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 163 [2020-07-20 05:45:35,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:35,049 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 05:45:35,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-07-20 05:45:35,049 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 05:45:35,050 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 05:45:35,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-20 05:45:35,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 05:45:35,301 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 05:45:35,301 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:45:35,302 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:45:35,302 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 05:45:35,302 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 05:45:35,302 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 05:45:35,302 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-20 05:45:35,302 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (<= 1 sum_~n)) [2020-07-20 05:45:35,302 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-20 05:45:35,303 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-20 05:45:35,303 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-20 05:45:35,303 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-20 05:45:35,303 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-20 05:45:35,303 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-20 05:45:35,303 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-20 05:45:35,303 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-20 05:45:35,303 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-20 05:45:35,303 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= 25 main_~a~0) [2020-07-20 05:45:35,304 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-20 05:45:35,304 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-20 05:45:35,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:45:35 BoogieIcfgContainer [2020-07-20 05:45:35,313 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 05:45:35,316 INFO L168 Benchmark]: Toolchain (without parser) took 44412.06 ms. Allocated memory was 139.5 MB in the beginning and 769.7 MB in the end (delta: 630.2 MB). Free memory was 101.1 MB in the beginning and 655.4 MB in the end (delta: -554.3 MB). Peak memory consumption was 75.9 MB. Max. memory is 7.1 GB. [2020-07-20 05:45:35,316 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 05:45:35,317 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.52 ms. Allocated memory is still 139.5 MB. Free memory was 100.7 MB in the beginning and 91.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 05:45:35,317 INFO L168 Benchmark]: Boogie Preprocessor took 24.29 ms. Allocated memory is still 139.5 MB. Free memory was 91.5 MB in the beginning and 90.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 05:45:35,317 INFO L168 Benchmark]: RCFGBuilder took 313.81 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 90.1 MB in the beginning and 168.9 MB in the end (delta: -78.8 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-07-20 05:45:35,318 INFO L168 Benchmark]: TraceAbstraction took 43793.06 ms. Allocated memory was 200.3 MB in the beginning and 769.7 MB in the end (delta: 569.4 MB). Free memory was 168.2 MB in the beginning and 655.4 MB in the end (delta: -487.2 MB). Peak memory consumption was 82.2 MB. Max. memory is 7.1 GB. [2020-07-20 05:45:35,321 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 274.52 ms. Allocated memory is still 139.5 MB. Free memory was 100.7 MB in the beginning and 91.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.29 ms. Allocated memory is still 139.5 MB. Free memory was 91.5 MB in the beginning and 90.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 313.81 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 90.1 MB in the beginning and 168.9 MB in the end (delta: -78.8 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 43793.06 ms. Allocated memory was 200.3 MB in the beginning and 769.7 MB in the end (delta: 569.4 MB). Free memory was 168.2 MB in the beginning and 655.4 MB in the end (delta: -487.2 MB). Peak memory consumption was 82.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 43.6s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 13.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 337 SDtfs, 1317 SDslu, 3695 SDs, 0 SdLazy, 5023 SolverSat, 457 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3839 GetRequests, 2950 SyntacticMatches, 0 SemanticMatches, 889 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10471 ImplicationChecksByTransitivity, 20.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 26 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 18 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 21.8s InterpolantComputationTime, 4563 NumberOfCodeBlocks, 3531 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 4512 ConstructedInterpolants, 0 QuantifiedInterpolants, 1516410 SizeOfPredicates, 379 NumberOfNonLiveVariables, 5298 ConjunctsInSsa, 913 ConjunctsInUnsatCore, 51 InterpolantComputations, 1 PerfectInterpolantSequences, 17800/33800 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 proved your program to be correct! Received shutdown request...