/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:35:35,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:35:35,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:35:35,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:35:35,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:35:35,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:35:35,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:35:35,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:35:35,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:35:35,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:35:35,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:35:35,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:35:35,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:35:35,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:35:35,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:35:35,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:35:35,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:35:35,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:35:35,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:35:35,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:35:35,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:35:35,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:35:35,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:35:35,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:35:35,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:35:35,987 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 [2020-08-22 16:35:36,040 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:35:36,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:35:36,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:35:36,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:35:36,044 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:35:36,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:35:36,045 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:35:36,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:35:36,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:35:36,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:35:36,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:35:36,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:35:36,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:35:36,046 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:35:36,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:35:36,046 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:35:36,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:35:36,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:35:36,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:35:36,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:35:36,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:35:36,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:35:36,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:35:36,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:35:36,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:35:36,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:35:36,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:35:36,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:35:36,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:35:36,050 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:35:36,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:35:36,408 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:35:36,414 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:35:36,416 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:35:36,417 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:35:36,418 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o20.c [2020-08-22 16:35:36,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/816262dea/5003539be0cc4d529ed910583279c6fe/FLAGc685801cd [2020-08-22 16:35:36,976 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:35:36,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o20.c [2020-08-22 16:35:36,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/816262dea/5003539be0cc4d529ed910583279c6fe/FLAGc685801cd [2020-08-22 16:35:37,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/816262dea/5003539be0cc4d529ed910583279c6fe [2020-08-22 16:35:37,367 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:35:37,371 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:35:37,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:35:37,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:35:37,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:35:37,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:35:37" (1/1) ... [2020-08-22 16:35:37,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d198d94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:37, skipping insertion in model container [2020-08-22 16:35:37,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:35:37" (1/1) ... [2020-08-22 16:35:37,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:35:37,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:35:37,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:35:37,574 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:35:37,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:35:37,603 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:35:37,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:37 WrapperNode [2020-08-22 16:35:37,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:35:37,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:35:37,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:35:37,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:35:37,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:37" (1/1) ... [2020-08-22 16:35:37,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:37" (1/1) ... [2020-08-22 16:35:37,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:37" (1/1) ... [2020-08-22 16:35:37,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:37" (1/1) ... [2020-08-22 16:35:37,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:37" (1/1) ... [2020-08-22 16:35:37,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:37" (1/1) ... [2020-08-22 16:35:37,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:37" (1/1) ... [2020-08-22 16:35:37,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:35:37,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:35:37,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:35:37,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:35:37,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:35:37,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:35:37,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:35:37,785 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 16:35:37,785 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:35:37,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 16:35:37,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:35:37,785 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 16:35:37,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:35:37,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:35:37,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:35:37,934 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:35:37,934 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 16:35:37,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:35:37 BoogieIcfgContainer [2020-08-22 16:35:37,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:35:37,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:35:37,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:35:37,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:35:37,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:35:37" (1/3) ... [2020-08-22 16:35:37,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6e93a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:35:37, skipping insertion in model container [2020-08-22 16:35:37,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:37" (2/3) ... [2020-08-22 16:35:37,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6e93a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:35:37, skipping insertion in model container [2020-08-22 16:35:37,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:35:37" (3/3) ... [2020-08-22 16:35:37,946 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o20.c [2020-08-22 16:35:37,956 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:35:37,962 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:35:37,974 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:35:37,998 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:35:37,999 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:35:37,999 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:35:37,999 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:35:37,999 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:35:37,999 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:35:38,000 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:35:38,000 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:35:38,017 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 16:35:38,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:35:38,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:38,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:38,024 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:38,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:38,031 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-22 16:35:38,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:38,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166317767] [2020-08-22 16:35:38,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:35:38,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166317767] [2020-08-22 16:35:38,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:35:38,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:35:38,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802221927] [2020-08-22 16:35:38,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:35:38,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:38,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:35:38,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:35:38,352 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 16:35:38,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:38,401 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-22 16:35:38,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:35:38,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 16:35:38,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:38,414 INFO L225 Difference]: With dead ends: 32 [2020-08-22 16:35:38,414 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 16:35:38,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:35:38,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 16:35:38,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 16:35:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 16:35:38,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 16:35:38,463 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 16:35:38,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:38,463 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 16:35:38,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:35:38,464 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 16:35:38,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 16:35:38,465 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:38,466 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:38,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:35:38,467 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:38,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:38,467 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-22 16:35:38,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:38,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062592492] [2020-08-22 16:35:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:35:38,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062592492] [2020-08-22 16:35:38,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400071107] [2020-08-22 16:35:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:38,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-08-22 16:35:38,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:35:38,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:38,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-08-22 16:35:38,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276712913] [2020-08-22 16:35:38,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:35:38,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:38,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:35:38,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:35:38,889 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-08-22 16:35:38,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:38,929 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 16:35:38,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:35:38,930 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-08-22 16:35:38,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:38,931 INFO L225 Difference]: With dead ends: 25 [2020-08-22 16:35:38,931 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 16:35:38,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:35:38,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 16:35:38,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 16:35:38,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 16:35:38,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 16:35:38,940 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 16:35:38,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:38,940 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 16:35:38,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:35:38,941 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 16:35:38,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:35:38,942 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:38,942 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:39,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:35:39,157 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:39,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:39,157 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-22 16:35:39,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:39,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829171914] [2020-08-22 16:35:39,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 16:35:39,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829171914] [2020-08-22 16:35:39,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59382851] [2020-08-22 16:35:39,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:39,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:35:39,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:39,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2020-08-22 16:35:39,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 16:35:39,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:39,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-08-22 16:35:39,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253850634] [2020-08-22 16:35:39,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:35:39,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:39,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:35:39,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:35:39,485 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2020-08-22 16:35:39,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:39,521 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 16:35:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:35:39,522 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-08-22 16:35:39,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:39,523 INFO L225 Difference]: With dead ends: 28 [2020-08-22 16:35:39,523 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 16:35:39,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:35:39,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 16:35:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 16:35:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 16:35:39,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 16:35:39,531 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 16:35:39,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:39,531 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 16:35:39,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:35:39,532 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 16:35:39,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 16:35:39,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:39,533 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:39,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:39,747 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:39,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:39,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-22 16:35:39,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:39,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122105454] [2020-08-22 16:35:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 16:35:39,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122105454] [2020-08-22 16:35:39,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974312605] [2020-08-22 16:35:39,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:40,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-08-22 16:35:40,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:40,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2020-08-22 16:35:40,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 16:35:40,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:40,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-08-22 16:35:40,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121322378] [2020-08-22 16:35:40,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 16:35:40,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:40,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 16:35:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:35:40,120 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2020-08-22 16:35:40,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:40,197 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 16:35:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:35:40,199 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-08-22 16:35:40,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:40,200 INFO L225 Difference]: With dead ends: 31 [2020-08-22 16:35:40,200 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 16:35:40,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:35:40,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 16:35:40,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 16:35:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 16:35:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 16:35:40,213 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 16:35:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:40,213 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 16:35:40,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 16:35:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 16:35:40,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 16:35:40,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:40,216 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:40,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:40,430 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:40,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:40,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-22 16:35:40,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:40,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855864527] [2020-08-22 16:35:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 16:35:40,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855864527] [2020-08-22 16:35:40,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997008939] [2020-08-22 16:35:40,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:40,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:35:40,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:40,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2020-08-22 16:35:40,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 16:35:40,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:40,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-08-22 16:35:40,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128567976] [2020-08-22 16:35:40,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:35:40,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:40,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:35:40,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:35:40,882 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2020-08-22 16:35:40,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:40,951 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 16:35:40,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 16:35:40,952 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-08-22 16:35:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:40,954 INFO L225 Difference]: With dead ends: 34 [2020-08-22 16:35:40,954 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 16:35:40,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:35:40,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 16:35:40,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 16:35:40,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 16:35:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 16:35:40,962 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 16:35:40,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:40,962 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 16:35:40,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:35:40,963 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 16:35:40,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 16:35:40,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:40,964 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:41,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:41,171 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:41,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:41,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-22 16:35:41,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:41,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708609159] [2020-08-22 16:35:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 16:35:41,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708609159] [2020-08-22 16:35:41,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517330731] [2020-08-22 16:35:41,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:41,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-08-22 16:35:41,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:41,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core [2020-08-22 16:35:41,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 16:35:41,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:41,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-08-22 16:35:41,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148299639] [2020-08-22 16:35:41,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 16:35:41,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:41,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 16:35:41,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:35:41,775 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 16 states. [2020-08-22 16:35:41,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:41,890 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 16:35:41,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:35:41,892 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-08-22 16:35:41,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:41,897 INFO L225 Difference]: With dead ends: 37 [2020-08-22 16:35:41,897 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 16:35:41,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:35:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 16:35:41,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 16:35:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 16:35:41,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 16:35:41,909 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 16:35:41,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:41,910 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 16:35:41,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 16:35:41,910 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 16:35:41,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 16:35:41,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:41,913 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:42,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-08-22 16:35:42,121 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:42,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-22 16:35:42,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:42,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776380409] [2020-08-22 16:35:42,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 16:35:42,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776380409] [2020-08-22 16:35:42,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507934943] [2020-08-22 16:35:42,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:42,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-08-22 16:35:42,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:42,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjunts are in the unsatisfiable core [2020-08-22 16:35:42,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 16:35:42,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:42,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-08-22 16:35:42,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256232101] [2020-08-22 16:35:42,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 16:35:42,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:42,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 16:35:42,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:35:42,631 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 18 states. [2020-08-22 16:35:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:42,744 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 16:35:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 16:35:42,744 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-08-22 16:35:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:42,746 INFO L225 Difference]: With dead ends: 40 [2020-08-22 16:35:42,746 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 16:35:42,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:35:42,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 16:35:42,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 16:35:42,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 16:35:42,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 16:35:42,753 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 16:35:42,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:42,753 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 16:35:42,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 16:35:42,754 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 16:35:42,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 16:35:42,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:42,755 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:42,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:42,969 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:42,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-22 16:35:42,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:42,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179812827] [2020-08-22 16:35:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 16:35:43,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179812827] [2020-08-22 16:35:43,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810023063] [2020-08-22 16:35:43,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-08-22 16:35:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2020-08-22 16:35:43,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 16:35:43,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:43,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-08-22 16:35:43,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247477265] [2020-08-22 16:35:43,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 16:35:43,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:43,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 16:35:43,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:35:43,495 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 20 states. [2020-08-22 16:35:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:43,633 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 16:35:43,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 16:35:43,633 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2020-08-22 16:35:43,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:43,635 INFO L225 Difference]: With dead ends: 43 [2020-08-22 16:35:43,635 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 16:35:43,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:35:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 16:35:43,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 16:35:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 16:35:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 16:35:43,642 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 16:35:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:43,642 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 16:35:43,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 16:35:43,642 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 16:35:43,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 16:35:43,643 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:43,644 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:43,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:43,858 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:43,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:43,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-22 16:35:43,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:43,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319064644] [2020-08-22 16:35:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:44,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:44,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:44,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:44,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:44,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:44,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 16:35:44,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319064644] [2020-08-22 16:35:44,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275405154] [2020-08-22 16:35:44,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:44,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:35:44,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:44,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 39 conjunts are in the unsatisfiable core [2020-08-22 16:35:44,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 16:35:44,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:44,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-08-22 16:35:44,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059303615] [2020-08-22 16:35:44,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 16:35:44,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:44,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 16:35:44,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-08-22 16:35:44,568 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 22 states. [2020-08-22 16:35:44,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:44,745 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 16:35:44,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 16:35:44,745 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-08-22 16:35:44,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:44,746 INFO L225 Difference]: With dead ends: 46 [2020-08-22 16:35:44,746 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 16:35:44,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-08-22 16:35:44,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 16:35:44,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 16:35:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 16:35:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 16:35:44,760 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 16:35:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:44,761 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 16:35:44,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 16:35:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 16:35:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 16:35:44,764 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:44,764 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:44,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-08-22 16:35:44,978 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:44,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:44,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-22 16:35:44,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:44,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683116913] [2020-08-22 16:35:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 16:35:45,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683116913] [2020-08-22 16:35:45,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263850087] [2020-08-22 16:35:45,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-08-22 16:35:45,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-08-22 16:35:45,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:45,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 44 conjunts are in the unsatisfiable core [2020-08-22 16:35:45,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 16:35:45,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:45,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-08-22 16:35:45,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600440996] [2020-08-22 16:35:45,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 16:35:45,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:45,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 16:35:45,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:35:45,703 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2020-08-22 16:35:45,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:45,916 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 16:35:45,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 16:35:45,917 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-08-22 16:35:45,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:45,921 INFO L225 Difference]: With dead ends: 49 [2020-08-22 16:35:45,922 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 16:35:45,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:35:45,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 16:35:45,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 16:35:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 16:35:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 16:35:45,936 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 16:35:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:45,937 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 16:35:45,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 16:35:45,937 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 16:35:45,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 16:35:45,938 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:45,938 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:46,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:46,139 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:46,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:46,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-22 16:35:46,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:46,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705086402] [2020-08-22 16:35:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 16:35:46,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705086402] [2020-08-22 16:35:46,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324962417] [2020-08-22 16:35:46,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:46,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:35:46,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:46,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjunts are in the unsatisfiable core [2020-08-22 16:35:46,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 16:35:46,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:46,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-08-22 16:35:46,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291849038] [2020-08-22 16:35:46,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 16:35:46,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:46,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 16:35:46,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2020-08-22 16:35:46,947 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 26 states. [2020-08-22 16:35:47,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:47,170 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-22 16:35:47,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 16:35:47,170 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-08-22 16:35:47,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:47,172 INFO L225 Difference]: With dead ends: 52 [2020-08-22 16:35:47,172 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 16:35:47,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2020-08-22 16:35:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 16:35:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 16:35:47,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 16:35:47,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 16:35:47,178 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-22 16:35:47,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:47,179 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 16:35:47,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 16:35:47,179 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 16:35:47,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 16:35:47,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:47,180 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:47,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:47,381 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:47,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:47,382 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-22 16:35:47,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:47,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284099991] [2020-08-22 16:35:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:48,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:48,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:48,155 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 16:35:48,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284099991] [2020-08-22 16:35:48,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771706529] [2020-08-22 16:35:48,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:36:03,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-08-22 16:36:03,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:36:03,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 51 conjunts are in the unsatisfiable core [2020-08-22 16:36:03,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:36:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 16:36:03,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:36:03,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-08-22 16:36:03,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938224881] [2020-08-22 16:36:03,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 16:36:03,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:36:03,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 16:36:03,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:36:03,969 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 28 states. [2020-08-22 16:36:04,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:36:04,252 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-22 16:36:04,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 16:36:04,255 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-22 16:36:04,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:36:04,256 INFO L225 Difference]: With dead ends: 55 [2020-08-22 16:36:04,256 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 16:36:04,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:36:04,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 16:36:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-22 16:36:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 16:36:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-22 16:36:04,272 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-22 16:36:04,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:36:04,272 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-22 16:36:04,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 16:36:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-22 16:36:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 16:36:04,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:36:04,277 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:36:04,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-08-22 16:36:04,478 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:36:04,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:36:04,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-22 16:36:04,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:36:04,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062403483] [2020-08-22 16:36:04,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:36:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:36:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:36:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:04,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:05,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:05,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:05,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:05,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:05,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:05,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 16:36:05,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062403483] [2020-08-22 16:36:05,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497192046] [2020-08-22 16:36:05,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:36:05,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-08-22 16:36:05,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:36:05,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 55 conjunts are in the unsatisfiable core [2020-08-22 16:36:05,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:36:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 16:36:05,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:36:05,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-08-22 16:36:05,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183111912] [2020-08-22 16:36:05,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 16:36:05,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:36:05,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 16:36:05,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:36:05,854 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 30 states. [2020-08-22 16:36:06,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:36:06,248 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-22 16:36:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 16:36:06,249 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2020-08-22 16:36:06,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:36:06,251 INFO L225 Difference]: With dead ends: 58 [2020-08-22 16:36:06,251 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 16:36:06,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:36:06,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 16:36:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-22 16:36:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 16:36:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 16:36:06,269 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-22 16:36:06,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:36:06,269 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 16:36:06,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 16:36:06,273 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 16:36:06,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 16:36:06,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:36:06,276 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:36:06,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-08-22 16:36:06,477 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:36:06,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:36:06,477 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-22 16:36:06,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:36:06,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733356771] [2020-08-22 16:36:06,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:36:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:36:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:36:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:06,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 16:36:07,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733356771] [2020-08-22 16:36:07,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058156308] [2020-08-22 16:36:07,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:36:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 59 conjunts are in the unsatisfiable core [2020-08-22 16:36:07,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:36:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 16:36:07,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:36:07,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-08-22 16:36:07,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561811443] [2020-08-22 16:36:07,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 16:36:07,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:36:07,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 16:36:07,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2020-08-22 16:36:07,673 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 32 states. [2020-08-22 16:36:08,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:36:08,036 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-22 16:36:08,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 16:36:08,036 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 91 [2020-08-22 16:36:08,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:36:08,037 INFO L225 Difference]: With dead ends: 61 [2020-08-22 16:36:08,038 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 16:36:08,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2020-08-22 16:36:08,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 16:36:08,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 16:36:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 16:36:08,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-22 16:36:08,054 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-22 16:36:08,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:36:08,055 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-22 16:36:08,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 16:36:08,055 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-22 16:36:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 16:36:08,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:36:08,056 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:36:08,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-08-22 16:36:08,270 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:36:08,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:36:08,270 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-22 16:36:08,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:36:08,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531779542] [2020-08-22 16:36:08,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:36:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:36:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:36:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 16:36:09,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531779542] [2020-08-22 16:36:09,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567131991] [2020-08-22 16:36:09,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:36:09,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:36:09,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:36:09,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 63 conjunts are in the unsatisfiable core [2020-08-22 16:36:09,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:36:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 16:36:09,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:36:09,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-08-22 16:36:09,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631214995] [2020-08-22 16:36:09,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 16:36:09,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:36:09,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 16:36:09,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 16:36:09,434 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 34 states. [2020-08-22 16:36:09,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:36:09,856 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 16:36:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 16:36:09,858 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2020-08-22 16:36:09,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:36:09,859 INFO L225 Difference]: With dead ends: 64 [2020-08-22 16:36:09,859 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 16:36:09,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 16:36:09,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 16:36:09,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-22 16:36:09,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 16:36:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 16:36:09,866 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-22 16:36:09,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:36:09,867 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 16:36:09,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 16:36:09,867 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 16:36:09,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 16:36:09,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:36:09,868 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:36:10,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:36:10,081 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:36:10,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:36:10,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-22 16:36:10,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:36:10,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797560137] [2020-08-22 16:36:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:36:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:36:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:36:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:11,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:11,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 16:36:11,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797560137] [2020-08-22 16:36:11,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171270540] [2020-08-22 16:36:11,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:36:12,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-08-22 16:36:12,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:36:12,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 68 conjunts are in the unsatisfiable core [2020-08-22 16:36:12,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:36:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 16:36:12,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:36:12,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-08-22 16:36:12,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255730149] [2020-08-22 16:36:12,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 16:36:12,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:36:12,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 16:36:12,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 16:36:12,402 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 36 states. [2020-08-22 16:36:12,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:36:12,930 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-22 16:36:12,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 16:36:12,932 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 103 [2020-08-22 16:36:12,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:36:12,934 INFO L225 Difference]: With dead ends: 67 [2020-08-22 16:36:12,934 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 16:36:12,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 16:36:12,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 16:36:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-22 16:36:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 16:36:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-22 16:36:12,943 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-22 16:36:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:36:12,943 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-22 16:36:12,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 16:36:12,944 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-22 16:36:12,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 16:36:12,945 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:36:12,946 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:36:13,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-08-22 16:36:13,152 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:36:13,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:36:13,153 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-22 16:36:13,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:36:13,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881144625] [2020-08-22 16:36:13,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:36:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:36:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:36:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:14,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:14,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:14,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:14,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:14,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 16:36:14,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881144625] [2020-08-22 16:36:14,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274092134] [2020-08-22 16:36:14,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:36:14,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:36:14,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:36:14,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 71 conjunts are in the unsatisfiable core [2020-08-22 16:36:14,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:36:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 16:36:14,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:36:14,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-08-22 16:36:14,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768963582] [2020-08-22 16:36:14,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 16:36:14,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:36:14,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 16:36:14,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 16:36:14,631 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 38 states. [2020-08-22 16:36:15,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:36:15,199 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-22 16:36:15,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 16:36:15,204 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 109 [2020-08-22 16:36:15,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:36:15,205 INFO L225 Difference]: With dead ends: 70 [2020-08-22 16:36:15,205 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 16:36:15,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 16:36:15,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 16:36:15,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-22 16:36:15,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 16:36:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-22 16:36:15,211 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-22 16:36:15,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:36:15,211 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-22 16:36:15,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 16:36:15,212 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-22 16:36:15,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 16:36:15,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:36:15,213 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:36:15,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-08-22 16:36:15,417 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:36:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:36:15,417 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-22 16:36:15,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:36:15,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556506573] [2020-08-22 16:36:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:36:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:15,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:36:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:15,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:36:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:15,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:15,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:15,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:15,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:15,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:15,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:15,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:15,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-22 16:36:16,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556506573] [2020-08-22 16:36:16,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946494668] [2020-08-22 16:36:16,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true