/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/sum_10x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:22:26,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:22:26,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:22:26,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-09-04 13:22:26,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:22:26,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:22:26,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:22:26,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:22:26,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:22:26,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:22:26,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:22:26,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:22:26,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:22:26,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:22:26,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:22:26,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:22:26,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:22:26,510 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:22:26,574 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:22:26,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:22:26,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:22:26,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:22:26,580 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:22:26,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:22:26,580 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:22:26,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:22:26,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:22:26,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:22:26,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:22:26,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:22:26,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:22:26,582 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:22:26,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:22:26,583 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:22:26,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:22:26,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:22:26,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:22:26,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:22:26,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:22:26,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:22:26,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:22:26,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:22:26,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:22:26,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:22:26,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:22:26,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:22:26,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:22:26,590 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:22:27,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:22:27,112 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:22:27,116 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:22:27,118 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:22:27,118 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:22:27,120 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-09-04 13:22:27,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c655e78b5/780af508a4af4b5b9733677cf5960f6a/FLAG816d773a2 [2020-09-04 13:22:27,791 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:22:27,792 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-09-04 13:22:27,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c655e78b5/780af508a4af4b5b9733677cf5960f6a/FLAG816d773a2 [2020-09-04 13:22:28,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c655e78b5/780af508a4af4b5b9733677cf5960f6a [2020-09-04 13:22:28,108 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:22:28,110 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:22:28,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:22:28,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:22:28,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:22:28,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:22:28" (1/1) ... [2020-09-04 13:22:28,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b50993e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:28, skipping insertion in model container [2020-09-04 13:22:28,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:22:28" (1/1) ... [2020-09-04 13:22:28,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:22:28,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:22:28,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:22:28,400 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:22:28,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:22:28,432 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:22:28,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:28 WrapperNode [2020-09-04 13:22:28,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:22:28,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:22:28,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:22:28,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:22:28,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:28" (1/1) ... [2020-09-04 13:22:28,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:28" (1/1) ... [2020-09-04 13:22:28,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:28" (1/1) ... [2020-09-04 13:22:28,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:28" (1/1) ... [2020-09-04 13:22:28,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:28" (1/1) ... [2020-09-04 13:22:28,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:28" (1/1) ... [2020-09-04 13:22:28,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:28" (1/1) ... [2020-09-04 13:22:28,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:22:28,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:22:28,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:22:28,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:22:28,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:28,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:22:28,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:22:28,637 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-09-04 13:22:28,637 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:22:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:22:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-09-04 13:22:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:22:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:22:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:22:28,848 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:22:28,853 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:22:28,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:22:28 BoogieIcfgContainer [2020-09-04 13:22:28,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:22:28,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:22:28,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:22:28,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:22:28,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:22:28" (1/3) ... [2020-09-04 13:22:28,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2445dd48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:22:28, skipping insertion in model container [2020-09-04 13:22:28,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:28" (2/3) ... [2020-09-04 13:22:28,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2445dd48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:22:28, skipping insertion in model container [2020-09-04 13:22:28,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:22:28" (3/3) ... [2020-09-04 13:22:28,893 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2020-09-04 13:22:28,926 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:22:28,949 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:22:28,995 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:22:29,027 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:22:29,027 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:22:29,027 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:22:29,028 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:22:29,028 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:22:29,028 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:22:29,028 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:22:29,028 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:22:29,052 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-04 13:22:29,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:22:29,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:29,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:29,060 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:29,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:29,066 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-09-04 13:22:29,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:29,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129760741] [2020-09-04 13:22:29,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:29,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:29,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:22:29,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129760741] [2020-09-04 13:22:29,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:22:29,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:22:29,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713857258] [2020-09-04 13:22:29,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:22:29,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:29,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:22:29,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:22:29,345 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-09-04 13:22:29,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:29,458 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-09-04 13:22:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:22:29,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 13:22:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:29,474 INFO L225 Difference]: With dead ends: 30 [2020-09-04 13:22:29,474 INFO L226 Difference]: Without dead ends: 18 [2020-09-04 13:22:29,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:22:29,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-04 13:22:29,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-04 13:22:29,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-04 13:22:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-04 13:22:29,541 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-09-04 13:22:29,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:29,541 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-04 13:22:29,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:22:29,542 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-04 13:22:29,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-04 13:22:29,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:29,544 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:29,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:22:29,545 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:29,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:29,546 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-09-04 13:22:29,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:29,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41675747] [2020-09-04 13:22:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:29,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:29,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:29,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:22:29,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41675747] [2020-09-04 13:22:29,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207533455] [2020-09-04 13:22:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:29,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:22:29,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:22:29,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:29,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-04 13:22:29,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936735147] [2020-09-04 13:22:29,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:22:29,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:29,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:22:29,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:22:29,883 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-09-04 13:22:29,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:29,950 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-09-04 13:22:29,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:22:29,951 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-04 13:22:29,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:29,953 INFO L225 Difference]: With dead ends: 25 [2020-09-04 13:22:29,953 INFO L226 Difference]: Without dead ends: 21 [2020-09-04 13:22:29,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:22:29,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-04 13:22:29,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-04 13:22:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-04 13:22:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-04 13:22:29,962 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-09-04 13:22:29,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:29,963 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-04 13:22:29,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:22:29,963 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-04 13:22:29,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 13:22:29,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:29,965 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:30,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:22:30,179 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:30,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:30,180 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-09-04 13:22:30,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:30,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077629011] [2020-09-04 13:22:30,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:30,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:30,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:30,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:30,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 13:22:30,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077629011] [2020-09-04 13:22:30,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987654088] [2020-09-04 13:22:30,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:30,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:22:30,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:30,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:22:30,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 13:22:30,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:30,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-04 13:22:30,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704939183] [2020-09-04 13:22:30,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:22:30,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:30,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:22:30,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:22:30,531 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-09-04 13:22:30,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:30,621 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-04 13:22:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:22:30,622 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-04 13:22:30,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:30,624 INFO L225 Difference]: With dead ends: 28 [2020-09-04 13:22:30,624 INFO L226 Difference]: Without dead ends: 24 [2020-09-04 13:22:30,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:22:30,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-04 13:22:30,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-04 13:22:30,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-04 13:22:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-04 13:22:30,631 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-09-04 13:22:30,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:30,632 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-04 13:22:30,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:22:30,632 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-04 13:22:30,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 13:22:30,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:30,633 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:30,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:30,847 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:30,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:30,848 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-09-04 13:22:30,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:30,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103688692] [2020-09-04 13:22:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:30,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:30,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:30,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:30,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:30,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-04 13:22:31,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103688692] [2020-09-04 13:22:31,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035116743] [2020-09-04 13:22:31,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:31,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-04 13:22:31,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:31,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-04 13:22:31,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-04 13:22:31,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:31,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-04 13:22:31,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609858571] [2020-09-04 13:22:31,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:22:31,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:31,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:22:31,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:22:31,122 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-09-04 13:22:31,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:31,200 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-09-04 13:22:31,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 13:22:31,200 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-09-04 13:22:31,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:31,202 INFO L225 Difference]: With dead ends: 31 [2020-09-04 13:22:31,202 INFO L226 Difference]: Without dead ends: 27 [2020-09-04 13:22:31,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:22:31,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-04 13:22:31,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-04 13:22:31,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 13:22:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-04 13:22:31,209 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-09-04 13:22:31,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:31,209 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-04 13:22:31,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:22:31,210 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-04 13:22:31,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 13:22:31,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:31,211 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:31,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:31,427 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:31,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:31,428 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-09-04 13:22:31,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:31,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395413954] [2020-09-04 13:22:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:31,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:31,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:31,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:31,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:31,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:31,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-04 13:22:31,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395413954] [2020-09-04 13:22:31,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154460374] [2020-09-04 13:22:31,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:31,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:22:31,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:31,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-04 13:22:31,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-04 13:22:31,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:31,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-04 13:22:31,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50490514] [2020-09-04 13:22:31,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:22:31,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:31,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:22:31,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:22:31,687 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-09-04 13:22:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:31,779 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-09-04 13:22:31,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:22:31,780 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-09-04 13:22:31,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:31,782 INFO L225 Difference]: With dead ends: 34 [2020-09-04 13:22:31,782 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 13:22:31,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:22:31,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 13:22:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-04 13:22:31,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:22:31,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-04 13:22:31,790 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-09-04 13:22:31,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:31,790 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-04 13:22:31,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:22:31,791 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-04 13:22:31,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 13:22:31,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:31,792 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:32,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:32,003 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:32,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:32,003 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-09-04 13:22:32,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:32,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943433587] [2020-09-04 13:22:32,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-04 13:22:32,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943433587] [2020-09-04 13:22:32,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384219400] [2020-09-04 13:22:32,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:32,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-04 13:22:32,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:32,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-04 13:22:32,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-04 13:22:32,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:32,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-04 13:22:32,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165182874] [2020-09-04 13:22:32,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:22:32,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:32,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:22:32,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:22:32,309 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-09-04 13:22:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:32,401 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-09-04 13:22:32,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:22:32,401 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-09-04 13:22:32,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:32,403 INFO L225 Difference]: With dead ends: 37 [2020-09-04 13:22:32,403 INFO L226 Difference]: Without dead ends: 33 [2020-09-04 13:22:32,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:22:32,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-04 13:22:32,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-04 13:22:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 13:22:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-04 13:22:32,410 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-09-04 13:22:32,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:32,411 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-04 13:22:32,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:22:32,411 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-04 13:22:32,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-04 13:22:32,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:32,413 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:32,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-04 13:22:32,618 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:32,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:32,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-09-04 13:22:32,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:32,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367249338] [2020-09-04 13:22:32,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-09-04 13:22:32,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367249338] [2020-09-04 13:22:32,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804641618] [2020-09-04 13:22:32,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:32,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-04 13:22:32,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:32,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-04 13:22:32,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-09-04 13:22:32,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:32,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-04 13:22:32,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280789324] [2020-09-04 13:22:32,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 13:22:32,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:32,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 13:22:32,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:22:32,957 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-09-04 13:22:33,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:33,085 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-09-04 13:22:33,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 13:22:33,086 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-09-04 13:22:33,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:33,087 INFO L225 Difference]: With dead ends: 40 [2020-09-04 13:22:33,087 INFO L226 Difference]: Without dead ends: 36 [2020-09-04 13:22:33,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-09-04 13:22:33,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-04 13:22:33,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-04 13:22:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-04 13:22:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-04 13:22:33,094 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-09-04 13:22:33,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:33,094 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-04 13:22:33,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 13:22:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-04 13:22:33,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-04 13:22:33,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:33,096 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:33,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:33,310 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:33,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:33,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-09-04 13:22:33,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:33,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005074660] [2020-09-04 13:22:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:33,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:33,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:33,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:33,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:33,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:33,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:33,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:33,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:33,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-04 13:22:33,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005074660] [2020-09-04 13:22:33,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087094629] [2020-09-04 13:22:33,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:33,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-04 13:22:33,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-04 13:22:33,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:33,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-04 13:22:33,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773455814] [2020-09-04 13:22:33,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 13:22:33,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:33,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 13:22:33,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:22:33,674 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-09-04 13:22:33,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:33,807 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-09-04 13:22:33,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 13:22:33,808 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-09-04 13:22:33,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:33,809 INFO L225 Difference]: With dead ends: 43 [2020-09-04 13:22:33,809 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 13:22:33,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-09-04 13:22:33,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 13:22:33,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-09-04 13:22:33,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 13:22:33,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-09-04 13:22:33,817 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-09-04 13:22:33,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:33,818 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-09-04 13:22:33,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 13:22:33,818 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-09-04 13:22:33,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-04 13:22:33,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:33,819 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:34,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:34,035 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:34,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:34,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-09-04 13:22:34,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:34,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548094818] [2020-09-04 13:22:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-09-04 13:22:34,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548094818] [2020-09-04 13:22:34,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664384236] [2020-09-04 13:22:34,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:34,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:22:34,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:34,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-04 13:22:34,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-09-04 13:22:34,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:34,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-04 13:22:34,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174168696] [2020-09-04 13:22:34,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 13:22:34,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:34,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 13:22:34,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:22:34,517 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-09-04 13:22:34,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:34,670 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-04 13:22:34,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 13:22:34,670 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-09-04 13:22:34,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:34,672 INFO L225 Difference]: With dead ends: 46 [2020-09-04 13:22:34,672 INFO L226 Difference]: Without dead ends: 42 [2020-09-04 13:22:34,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-09-04 13:22:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-04 13:22:34,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-04 13:22:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 13:22:34,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-04 13:22:34,680 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-09-04 13:22:34,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:34,681 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-04 13:22:34,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 13:22:34,681 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-04 13:22:34,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 13:22:34,682 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:34,683 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:34,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-04 13:22:34,897 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:34,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:34,898 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-09-04 13:22:34,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:34,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839581376] [2020-09-04 13:22:34,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-09-04 13:22:35,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839581376] [2020-09-04 13:22:35,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494422768] [2020-09-04 13:22:35,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:35,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-04 13:22:35,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:35,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-04 13:22:35,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-09-04 13:22:35,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:35,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-04 13:22:35,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517781002] [2020-09-04 13:22:35,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 13:22:35,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:35,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 13:22:35,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:22:35,386 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-09-04 13:22:35,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:35,532 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-09-04 13:22:35,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 13:22:35,533 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-04 13:22:35,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:35,534 INFO L225 Difference]: With dead ends: 49 [2020-09-04 13:22:35,534 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 13:22:35,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-09-04 13:22:35,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 13:22:35,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-04 13:22:35,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 13:22:35,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-04 13:22:35,541 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-09-04 13:22:35,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:35,541 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-04 13:22:35,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 13:22:35,542 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-04 13:22:35,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 13:22:35,543 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:35,543 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:35,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:35,759 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:35,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:35,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-09-04 13:22:35,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:35,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464001171] [2020-09-04 13:22:35,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2020-09-04 13:22:36,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464001171] [2020-09-04 13:22:36,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:22:36,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 13:22:36,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319569224] [2020-09-04 13:22:36,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:22:36,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:36,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:22:36,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:22:36,444 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 8 states. [2020-09-04 13:22:36,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:36,556 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-09-04 13:22:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 13:22:36,556 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-09-04 13:22:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:36,557 INFO L225 Difference]: With dead ends: 45 [2020-09-04 13:22:36,557 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:22:36,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:22:36,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:22:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:22:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:22:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:22:36,562 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2020-09-04 13:22:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:36,562 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:22:36,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:22:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:22:36,563 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:22:36,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 13:22:36,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:22:36,608 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 13:22:36,608 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:22:36,608 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:22:36,608 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:22:36,609 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:22:36,609 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:22:36,609 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-09-04 13:22:36,609 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2020-09-04 13:22:36,610 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-09-04 13:22:36,610 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-09-04 13:22:36,610 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-09-04 13:22:36,610 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-09-04 13:22:36,611 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-09-04 13:22:36,611 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-09-04 13:22:36,611 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-09-04 13:22:36,611 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-04 13:22:36,611 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-09-04 13:22:36,611 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 10) (<= 10 main_~a~0)) [2020-09-04 13:22:36,611 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-09-04 13:22:36,612 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-09-04 13:22:36,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:22:36 BoogieIcfgContainer [2020-09-04 13:22:36,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:22:36,624 INFO L168 Benchmark]: Toolchain (without parser) took 8512.69 ms. Allocated memory was 142.6 MB in the beginning and 299.4 MB in the end (delta: 156.8 MB). Free memory was 105.2 MB in the beginning and 202.1 MB in the end (delta: -96.9 MB). Peak memory consumption was 59.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:36,625 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 142.6 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 13:22:36,626 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.04 ms. Allocated memory is still 142.6 MB. Free memory was 105.0 MB in the beginning and 95.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:36,631 INFO L168 Benchmark]: Boogie Preprocessor took 33.31 ms. Allocated memory is still 142.6 MB. Free memory was 95.7 MB in the beginning and 94.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:36,638 INFO L168 Benchmark]: RCFGBuilder took 396.64 ms. Allocated memory was 142.6 MB in the beginning and 203.9 MB in the end (delta: 61.3 MB). Free memory was 94.3 MB in the beginning and 172.0 MB in the end (delta: -77.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:36,639 INFO L168 Benchmark]: TraceAbstraction took 7754.07 ms. Allocated memory was 203.9 MB in the beginning and 299.4 MB in the end (delta: 95.4 MB). Free memory was 171.3 MB in the beginning and 202.1 MB in the end (delta: -30.7 MB). Peak memory consumption was 64.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:36,646 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 142.6 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 322.04 ms. Allocated memory is still 142.6 MB. Free memory was 105.0 MB in the beginning and 95.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.31 ms. Allocated memory is still 142.6 MB. Free memory was 95.7 MB in the beginning and 94.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 396.64 ms. Allocated memory was 142.6 MB in the beginning and 203.9 MB in the end (delta: 61.3 MB). Free memory was 94.3 MB in the beginning and 172.0 MB in the end (delta: -77.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7754.07 ms. Allocated memory was 203.9 MB in the beginning and 299.4 MB in the end (delta: 95.4 MB). Free memory was 171.3 MB in the beginning and 202.1 MB in the end (delta: -30.7 MB). Peak memory consumption was 64.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.5s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 249 SDslu, 480 SDs, 0 SdLazy, 374 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 702 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 860 NumberOfCodeBlocks, 855 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 840 ConstructedInterpolants, 0 QuantifiedInterpolants, 126240 SizeOfPredicates, 63 NumberOfNonLiveVariables, 1114 ConjunctsInSsa, 126 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 1210/2110 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...