/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:53:10,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:53:10,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:53:10,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:53:10,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:53:10,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:53:10,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:53:10,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:53:10,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:53:10,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:53:10,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:53:10,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:53:10,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:53:10,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:53:10,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:53:10,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:53:10,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:53:10,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:53:10,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:53:10,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:53:10,629 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:53:10,643 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:53:10,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:53:10,645 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:53:10,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:53:10,645 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:53:10,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:53:10,646 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:53:10,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:53:10,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:53:10,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:53:10,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:53:10,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:53:10,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:53:10,647 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:53:10,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:53:10,648 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:53:10,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:53:10,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:53:10,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:53:10,648 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:53:10,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:53:10,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:53:10,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:53:10,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:53:10,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:53:10,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:53:10,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:53:10,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:53:10,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:53:10,951 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:53:10,977 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:53:10,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:53:10,982 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:53:10,982 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:53:10,983 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label40.c [2019-11-06 22:53:11,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d9a4fe2e/74fadee2758e4e3198940a2681f8dc0e/FLAGd5a595df6 [2019-11-06 22:53:11,728 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:53:11,730 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label40.c [2019-11-06 22:53:11,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d9a4fe2e/74fadee2758e4e3198940a2681f8dc0e/FLAGd5a595df6 [2019-11-06 22:53:11,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d9a4fe2e/74fadee2758e4e3198940a2681f8dc0e [2019-11-06 22:53:11,935 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:53:11,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:53:11,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:53:11,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:53:11,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:53:11,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:11" (1/1) ... [2019-11-06 22:53:11,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d7b20b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:11, skipping insertion in model container [2019-11-06 22:53:11,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:11" (1/1) ... [2019-11-06 22:53:11,952 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:53:12,044 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:53:12,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:53:12,969 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:53:13,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:53:13,396 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:53:13,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:13 WrapperNode [2019-11-06 22:53:13,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:53:13,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:53:13,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:53:13,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:53:13,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:13" (1/1) ... [2019-11-06 22:53:13,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:13" (1/1) ... [2019-11-06 22:53:13,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:13" (1/1) ... [2019-11-06 22:53:13,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:13" (1/1) ... [2019-11-06 22:53:13,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:13" (1/1) ... [2019-11-06 22:53:13,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:13" (1/1) ... [2019-11-06 22:53:13,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:13" (1/1) ... [2019-11-06 22:53:13,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:53:13,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:53:13,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:53:13,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:53:13,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:53:13,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:53:13,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:53:13,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:53:13,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:53:13,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:53:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:53:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:53:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:53:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:53:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:53:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:53:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:53:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:53:17,453 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:53:17,454 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:53:17,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:17 BoogieIcfgContainer [2019-11-06 22:53:17,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:53:17,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:53:17,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:53:17,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:53:17,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:53:11" (1/3) ... [2019-11-06 22:53:17,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d4fddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:17, skipping insertion in model container [2019-11-06 22:53:17,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:13" (2/3) ... [2019-11-06 22:53:17,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d4fddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:17, skipping insertion in model container [2019-11-06 22:53:17,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:17" (3/3) ... [2019-11-06 22:53:17,471 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label40.c [2019-11-06 22:53:17,487 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:53:17,498 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:53:17,510 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:53:17,550 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:53:17,551 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:53:17,552 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:53:17,552 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:53:17,552 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:53:17,552 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:53:17,552 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:53:17,552 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:53:17,588 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 22:53:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:53:17,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:17,596 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:53:17,598 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:17,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1190948056, now seen corresponding path program 1 times [2019-11-06 22:53:17,614 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:17,615 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112277926] [2019-11-06 22:53:17,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:17,900 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112277926] [2019-11-06 22:53:17,901 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:17,901 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:53:17,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789676120] [2019-11-06 22:53:17,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:53:17,912 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:17,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:53:17,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:17,930 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-11-06 22:53:23,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:23,187 INFO L93 Difference]: Finished difference Result 1497 states and 2757 transitions. [2019-11-06 22:53:23,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:53:23,190 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-11-06 22:53:23,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:23,243 INFO L225 Difference]: With dead ends: 1497 [2019-11-06 22:53:23,243 INFO L226 Difference]: Without dead ends: 993 [2019-11-06 22:53:23,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2019-11-06 22:53:23,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 682. [2019-11-06 22:53:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:53:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1002 transitions. [2019-11-06 22:53:23,348 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1002 transitions. Word has length 32 [2019-11-06 22:53:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:23,349 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1002 transitions. [2019-11-06 22:53:23,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:53:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1002 transitions. [2019-11-06 22:53:23,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-06 22:53:23,354 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:23,354 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:53:23,354 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:23,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:23,355 INFO L82 PathProgramCache]: Analyzing trace with hash 679417420, now seen corresponding path program 1 times [2019-11-06 22:53:23,355 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:23,355 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674128608] [2019-11-06 22:53:23,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:23,716 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674128608] [2019-11-06 22:53:23,717 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779293826] [2019-11-06 22:53:23,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:53:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:23,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:53:23,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:53:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:23,874 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:53:23,992 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:24,130 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:53:24,130 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 12 [2019-11-06 22:53:24,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462201771] [2019-11-06 22:53:24,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:53:24,133 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:24,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:53:24,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:53:24,134 INFO L87 Difference]: Start difference. First operand 682 states and 1002 transitions. Second operand 7 states. [2019-11-06 22:53:30,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:30,926 INFO L93 Difference]: Finished difference Result 2345 states and 3373 transitions. [2019-11-06 22:53:30,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:53:30,932 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2019-11-06 22:53:30,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:30,942 INFO L225 Difference]: With dead ends: 2345 [2019-11-06 22:53:30,943 INFO L226 Difference]: Without dead ends: 1669 [2019-11-06 22:53:30,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:53:30,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2019-11-06 22:53:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1345. [2019-11-06 22:53:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1345 states. [2019-11-06 22:53:31,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1830 transitions. [2019-11-06 22:53:31,059 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1830 transitions. Word has length 101 [2019-11-06 22:53:31,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:31,060 INFO L462 AbstractCegarLoop]: Abstraction has 1345 states and 1830 transitions. [2019-11-06 22:53:31,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:53:31,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1830 transitions. [2019-11-06 22:53:31,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 22:53:31,062 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:31,063 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:53:31,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:53:31,268 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:31,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:31,269 INFO L82 PathProgramCache]: Analyzing trace with hash -603532513, now seen corresponding path program 1 times [2019-11-06 22:53:31,269 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:31,270 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81455512] [2019-11-06 22:53:31,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:31,491 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81455512] [2019-11-06 22:53:31,495 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:31,495 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:53:31,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424828727] [2019-11-06 22:53:31,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:53:31,498 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:31,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:53:31,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:53:31,500 INFO L87 Difference]: Start difference. First operand 1345 states and 1830 transitions. Second operand 6 states. [2019-11-06 22:53:35,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:35,146 INFO L93 Difference]: Finished difference Result 3686 states and 5245 transitions. [2019-11-06 22:53:35,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:53:35,148 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 106 [2019-11-06 22:53:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:35,168 INFO L225 Difference]: With dead ends: 3686 [2019-11-06 22:53:35,169 INFO L226 Difference]: Without dead ends: 2347 [2019-11-06 22:53:35,173 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:53:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2019-11-06 22:53:35,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2308. [2019-11-06 22:53:35,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2308 states. [2019-11-06 22:53:35,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 3185 transitions. [2019-11-06 22:53:35,269 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 3185 transitions. Word has length 106 [2019-11-06 22:53:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:35,269 INFO L462 AbstractCegarLoop]: Abstraction has 2308 states and 3185 transitions. [2019-11-06 22:53:35,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:53:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 3185 transitions. [2019-11-06 22:53:35,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 22:53:35,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:35,277 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:53:35,278 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:35,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:35,278 INFO L82 PathProgramCache]: Analyzing trace with hash -986664877, now seen corresponding path program 1 times [2019-11-06 22:53:35,278 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:35,279 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826665313] [2019-11-06 22:53:35,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:35,404 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826665313] [2019-11-06 22:53:35,404 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:35,405 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:53:35,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357613104] [2019-11-06 22:53:35,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:53:35,407 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:35,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:53:35,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:35,408 INFO L87 Difference]: Start difference. First operand 2308 states and 3185 transitions. Second operand 4 states. [2019-11-06 22:53:38,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:38,877 INFO L93 Difference]: Finished difference Result 6800 states and 9448 transitions. [2019-11-06 22:53:38,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:53:38,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2019-11-06 22:53:38,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:38,907 INFO L225 Difference]: With dead ends: 6800 [2019-11-06 22:53:38,907 INFO L226 Difference]: Without dead ends: 4498 [2019-11-06 22:53:38,914 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4498 states. [2019-11-06 22:53:39,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4498 to 4493. [2019-11-06 22:53:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4493 states. [2019-11-06 22:53:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4493 states to 4493 states and 5779 transitions. [2019-11-06 22:53:39,026 INFO L78 Accepts]: Start accepts. Automaton has 4493 states and 5779 transitions. Word has length 112 [2019-11-06 22:53:39,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:39,028 INFO L462 AbstractCegarLoop]: Abstraction has 4493 states and 5779 transitions. [2019-11-06 22:53:39,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:53:39,028 INFO L276 IsEmpty]: Start isEmpty. Operand 4493 states and 5779 transitions. [2019-11-06 22:53:39,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-06 22:53:39,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:39,031 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:53:39,031 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:39,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1976934134, now seen corresponding path program 1 times [2019-11-06 22:53:39,032 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:39,032 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184288829] [2019-11-06 22:53:39,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:39,253 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184288829] [2019-11-06 22:53:39,253 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869922258] [2019-11-06 22:53:39,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:53:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:39,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:53:39,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:53:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:39,420 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:53:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:39,559 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:53:39,559 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 15 [2019-11-06 22:53:39,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582543521] [2019-11-06 22:53:39,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:53:39,561 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:39,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:53:39,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:53:39,561 INFO L87 Difference]: Start difference. First operand 4493 states and 5779 transitions. Second operand 6 states. [2019-11-06 22:53:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:45,086 INFO L93 Difference]: Finished difference Result 12799 states and 17374 transitions. [2019-11-06 22:53:45,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:53:45,086 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2019-11-06 22:53:45,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:45,131 INFO L225 Difference]: With dead ends: 12799 [2019-11-06 22:53:45,131 INFO L226 Difference]: Without dead ends: 8312 [2019-11-06 22:53:45,144 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:53:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8312 states. [2019-11-06 22:53:45,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8312 to 8292. [2019-11-06 22:53:45,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8292 states. [2019-11-06 22:53:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8292 states to 8292 states and 11145 transitions. [2019-11-06 22:53:45,384 INFO L78 Accepts]: Start accepts. Automaton has 8292 states and 11145 transitions. Word has length 127 [2019-11-06 22:53:45,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:45,386 INFO L462 AbstractCegarLoop]: Abstraction has 8292 states and 11145 transitions. [2019-11-06 22:53:45,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:53:45,387 INFO L276 IsEmpty]: Start isEmpty. Operand 8292 states and 11145 transitions. [2019-11-06 22:53:45,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-11-06 22:53:45,391 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:45,392 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:53:45,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:53:45,595 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:45,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:45,595 INFO L82 PathProgramCache]: Analyzing trace with hash 316777602, now seen corresponding path program 1 times [2019-11-06 22:53:45,596 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:45,596 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438168967] [2019-11-06 22:53:45,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-06 22:53:45,781 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438168967] [2019-11-06 22:53:45,781 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:45,782 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:53:45,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771951251] [2019-11-06 22:53:45,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:53:45,783 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:45,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:53:45,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:45,783 INFO L87 Difference]: Start difference. First operand 8292 states and 11145 transitions. Second operand 4 states. [2019-11-06 22:53:49,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:49,940 INFO L93 Difference]: Finished difference Result 20952 states and 29682 transitions. [2019-11-06 22:53:49,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:53:49,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 190 [2019-11-06 22:53:49,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:50,017 INFO L225 Difference]: With dead ends: 20952 [2019-11-06 22:53:50,018 INFO L226 Difference]: Without dead ends: 12666 [2019-11-06 22:53:50,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:50,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12666 states. [2019-11-06 22:53:50,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12666 to 11726. [2019-11-06 22:53:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11726 states. [2019-11-06 22:53:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11726 states to 11726 states and 16677 transitions. [2019-11-06 22:53:50,523 INFO L78 Accepts]: Start accepts. Automaton has 11726 states and 16677 transitions. Word has length 190 [2019-11-06 22:53:50,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:50,524 INFO L462 AbstractCegarLoop]: Abstraction has 11726 states and 16677 transitions. [2019-11-06 22:53:50,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:53:50,524 INFO L276 IsEmpty]: Start isEmpty. Operand 11726 states and 16677 transitions. [2019-11-06 22:53:50,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-11-06 22:53:50,530 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:50,530 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:53:50,530 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:50,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:50,531 INFO L82 PathProgramCache]: Analyzing trace with hash 2024125728, now seen corresponding path program 1 times [2019-11-06 22:53:50,531 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:50,531 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996118509] [2019-11-06 22:53:50,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 102 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:50,993 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996118509] [2019-11-06 22:53:50,994 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027254038] [2019-11-06 22:53:50,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:53:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:51,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 22:53:51,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:53:51,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:53:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-06 22:53:51,273 INFO L321 TraceCheckSpWp]: Computing backward predicates...