/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/Problem11_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:46:04,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:46:04,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:46:04,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:46:04,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:46:04,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:46:04,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:46:04,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:46:04,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:46:04,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:46:04,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:46:04,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:46:04,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:46:04,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:46:04,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:46:04,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:46:04,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:46:04,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:46:04,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:46:04,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:46:04,598 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 22:46:04,627 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:46:04,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:46:04,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:46:04,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:46:04,631 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:46:04,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:46:04,631 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:46:04,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:46:04,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:46:04,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:46:04,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:46:04,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:46:04,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:46:04,634 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:46:04,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:46:04,635 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:46:04,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:46:04,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:46:04,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:46:04,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:46:04,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:46:04,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:46:04,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:46:04,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:46:04,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:46:04,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:46:04,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:46:04,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:46:04,640 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 22:46:04,931 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:46:04,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:46:04,948 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:46:04,949 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:46:04,950 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:46:04,950 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label17.c [2019-11-06 22:46:05,012 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a6a2a74/6dc6935c6d534d88afca71160d19da72/FLAG6f306f1e6 [2019-11-06 22:46:05,628 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:46:05,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label17.c [2019-11-06 22:46:05,642 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a6a2a74/6dc6935c6d534d88afca71160d19da72/FLAG6f306f1e6 [2019-11-06 22:46:05,828 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a6a2a74/6dc6935c6d534d88afca71160d19da72 [2019-11-06 22:46:05,838 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:46:05,840 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:46:05,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:46:05,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:46:05,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:46:05,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:05" (1/1) ... [2019-11-06 22:46:05,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a2978c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:05, skipping insertion in model container [2019-11-06 22:46:05,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:05" (1/1) ... [2019-11-06 22:46:05,856 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:46:05,909 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:46:06,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:46:06,632 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:46:06,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:46:06,846 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:46:06,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:06 WrapperNode [2019-11-06 22:46:06,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:46:06,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:46:06,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:46:06,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:46:06,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:06" (1/1) ... [2019-11-06 22:46:06,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:06" (1/1) ... [2019-11-06 22:46:06,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:06" (1/1) ... [2019-11-06 22:46:06,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:06" (1/1) ... [2019-11-06 22:46:06,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:06" (1/1) ... [2019-11-06 22:46:06,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:06" (1/1) ... [2019-11-06 22:46:07,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:06" (1/1) ... [2019-11-06 22:46:07,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:46:07,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:46:07,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:46:07,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:46:07,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:06" (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 22:46:07,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:46:07,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:46:07,095 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:46:07,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:46:07,096 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:46:07,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:46:07,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:46:07,096 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:46:07,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:46:07,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:46:07,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:46:08,834 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:46:08,834 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:46:08,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:08 BoogieIcfgContainer [2019-11-06 22:46:08,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:46:08,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:46:08,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:46:08,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:46:08,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:05" (1/3) ... [2019-11-06 22:46:08,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792f8805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:08, skipping insertion in model container [2019-11-06 22:46:08,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:06" (2/3) ... [2019-11-06 22:46:08,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792f8805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:08, skipping insertion in model container [2019-11-06 22:46:08,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:08" (3/3) ... [2019-11-06 22:46:08,856 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label17.c [2019-11-06 22:46:08,870 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:46:08,881 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:46:08,894 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:46:08,934 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:46:08,934 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:46:08,935 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:46:08,935 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:46:08,935 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:46:08,935 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:46:08,936 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:46:08,936 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:46:08,973 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:46:08,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 22:46:08,983 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:08,985 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:46:08,987 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:08,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:08,994 INFO L82 PathProgramCache]: Analyzing trace with hash 2013037499, now seen corresponding path program 1 times [2019-11-06 22:46:09,005 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:09,006 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985926130] [2019-11-06 22:46:09,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:09,377 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 22:46:09,378 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985926130] [2019-11-06 22:46:09,379 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:09,380 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:46:09,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821043976] [2019-11-06 22:46:09,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:46:09,389 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:09,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:46:09,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:46:09,410 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-11-06 22:46:10,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:10,869 INFO L93 Difference]: Finished difference Result 787 states and 1379 transitions. [2019-11-06 22:46:10,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:46:10,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2019-11-06 22:46:10,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:10,905 INFO L225 Difference]: With dead ends: 787 [2019-11-06 22:46:10,907 INFO L226 Difference]: Without dead ends: 433 [2019-11-06 22:46:10,917 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:46:10,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2019-11-06 22:46:10,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 426. [2019-11-06 22:46:10,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-11-06 22:46:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 678 transitions. [2019-11-06 22:46:11,002 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 678 transitions. Word has length 44 [2019-11-06 22:46:11,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:11,003 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 678 transitions. [2019-11-06 22:46:11,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:46:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 678 transitions. [2019-11-06 22:46:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-06 22:46:11,008 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:11,008 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, 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] [2019-11-06 22:46:11,009 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:11,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:11,010 INFO L82 PathProgramCache]: Analyzing trace with hash -697152023, now seen corresponding path program 1 times [2019-11-06 22:46:11,010 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:11,010 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099014546] [2019-11-06 22:46:11,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:11,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099014546] [2019-11-06 22:46:11,236 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:11,236 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:46:11,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166611695] [2019-11-06 22:46:11,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:46:11,239 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:11,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:46:11,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:46:11,240 INFO L87 Difference]: Start difference. First operand 426 states and 678 transitions. Second operand 5 states. [2019-11-06 22:46:13,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:13,002 INFO L93 Difference]: Finished difference Result 1259 states and 2034 transitions. [2019-11-06 22:46:13,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:46:13,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2019-11-06 22:46:13,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:13,009 INFO L225 Difference]: With dead ends: 1259 [2019-11-06 22:46:13,009 INFO L226 Difference]: Without dead ends: 839 [2019-11-06 22:46:13,011 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:46:13,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2019-11-06 22:46:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 627. [2019-11-06 22:46:13,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2019-11-06 22:46:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 934 transitions. [2019-11-06 22:46:13,060 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 934 transitions. Word has length 119 [2019-11-06 22:46:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:13,061 INFO L462 AbstractCegarLoop]: Abstraction has 627 states and 934 transitions. [2019-11-06 22:46:13,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:46:13,062 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 934 transitions. [2019-11-06 22:46:13,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 22:46:13,067 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:13,068 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, 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 22:46:13,068 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:13,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:13,069 INFO L82 PathProgramCache]: Analyzing trace with hash 716839870, now seen corresponding path program 1 times [2019-11-06 22:46:13,069 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:13,069 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774597415] [2019-11-06 22:46:13,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:13,210 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774597415] [2019-11-06 22:46:13,211 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:13,211 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:46:13,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602845236] [2019-11-06 22:46:13,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:46:13,212 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:13,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:46:13,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:46:13,213 INFO L87 Difference]: Start difference. First operand 627 states and 934 transitions. Second operand 5 states. [2019-11-06 22:46:15,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:15,069 INFO L93 Difference]: Finished difference Result 1872 states and 2846 transitions. [2019-11-06 22:46:15,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:46:15,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-11-06 22:46:15,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:15,079 INFO L225 Difference]: With dead ends: 1872 [2019-11-06 22:46:15,080 INFO L226 Difference]: Without dead ends: 1251 [2019-11-06 22:46:15,082 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:46:15,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-11-06 22:46:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1032. [2019-11-06 22:46:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2019-11-06 22:46:15,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1433 transitions. [2019-11-06 22:46:15,125 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1433 transitions. Word has length 130 [2019-11-06 22:46:15,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:15,126 INFO L462 AbstractCegarLoop]: Abstraction has 1032 states and 1433 transitions. [2019-11-06 22:46:15,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:46:15,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1433 transitions. [2019-11-06 22:46:15,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-06 22:46:15,130 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:15,131 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, 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, 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 22:46:15,131 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:15,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:15,132 INFO L82 PathProgramCache]: Analyzing trace with hash -523045564, now seen corresponding path program 1 times [2019-11-06 22:46:15,132 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:15,132 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780657175] [2019-11-06 22:46:15,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:15,390 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780657175] [2019-11-06 22:46:15,390 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902314897] [2019-11-06 22:46:15,391 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 22:46:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:15,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:46:15,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:46:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:15,639 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:46:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:15,727 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:46:15,727 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-11-06 22:46:15,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802340737] [2019-11-06 22:46:15,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:46:15,729 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:15,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:46:15,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:46:15,730 INFO L87 Difference]: Start difference. First operand 1032 states and 1433 transitions. Second operand 3 states. [2019-11-06 22:46:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:16,935 INFO L93 Difference]: Finished difference Result 2662 states and 3820 transitions. [2019-11-06 22:46:16,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:46:16,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2019-11-06 22:46:16,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:16,954 INFO L225 Difference]: With dead ends: 2662 [2019-11-06 22:46:16,954 INFO L226 Difference]: Without dead ends: 1636 [2019-11-06 22:46:16,958 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 350 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:46:16,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2019-11-06 22:46:17,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1629. [2019-11-06 22:46:17,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2019-11-06 22:46:17,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2257 transitions. [2019-11-06 22:46:17,020 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2257 transitions. Word has length 175 [2019-11-06 22:46:17,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:17,022 INFO L462 AbstractCegarLoop]: Abstraction has 1629 states and 2257 transitions. [2019-11-06 22:46:17,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:46:17,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2257 transitions. [2019-11-06 22:46:17,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-06 22:46:17,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:17,030 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:46:17,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:46:17,237 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:17,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:17,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1334961658, now seen corresponding path program 1 times [2019-11-06 22:46:17,238 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:17,238 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863373524] [2019-11-06 22:46:17,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 74 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:46:17,495 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863373524] [2019-11-06 22:46:17,496 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073904584] [2019-11-06 22:46:17,496 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 22:46:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:17,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:46:17,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:46:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 22:46:17,733 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:46:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 74 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:46:17,833 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:46:17,834 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:46:17,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283591782] [2019-11-06 22:46:17,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:46:17,835 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:17,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:46:17,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:46:17,836 INFO L87 Difference]: Start difference. First operand 1629 states and 2257 transitions. Second operand 5 states. [2019-11-06 22:46:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:19,314 INFO L93 Difference]: Finished difference Result 4500 states and 6394 transitions. [2019-11-06 22:46:19,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:46:19,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 199 [2019-11-06 22:46:19,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:19,333 INFO L225 Difference]: With dead ends: 4500 [2019-11-06 22:46:19,333 INFO L226 Difference]: Without dead ends: 2877 [2019-11-06 22:46:19,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 394 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:46:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2019-11-06 22:46:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2825. [2019-11-06 22:46:19,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2825 states. [2019-11-06 22:46:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 3849 transitions. [2019-11-06 22:46:19,430 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 3849 transitions. Word has length 199 [2019-11-06 22:46:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:19,431 INFO L462 AbstractCegarLoop]: Abstraction has 2825 states and 3849 transitions. [2019-11-06 22:46:19,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:46:19,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 3849 transitions. [2019-11-06 22:46:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-11-06 22:46:19,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:19,436 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:46:19,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:46:19,641 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:19,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:19,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1124795769, now seen corresponding path program 1 times [2019-11-06 22:46:19,642 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:19,642 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211094138] [2019-11-06 22:46:19,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:19,830 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211094138] [2019-11-06 22:46:19,831 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589483537] [2019-11-06 22:46:19,831 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 22:46:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:19,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:46:19,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:46:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:20,038 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:46:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:20,149 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [203975372] [2019-11-06 22:46:20,157 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 201 [2019-11-06 22:46:20,219 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:46:20,220 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)