/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/Problem10_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:42:43,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:42:43,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:42:43,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:42:43,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:42:43,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:42:43,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:42:43,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:42:43,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:42:43,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:42:43,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:42:43,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:42:43,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:42:43,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:42:43,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:42:43,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:42:43,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:42:43,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:42:43,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:42:43,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:42:43,394 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 22:42:43,418 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:42:43,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:42:43,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:42:43,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:42:43,420 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:42:43,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:42:43,421 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:42:43,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:42:43,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:42:43,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:42:43,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:42:43,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:42:43,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:42:43,423 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:42:43,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:42:43,423 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:42:43,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:42:43,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:42:43,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:42:43,424 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:42:43,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:42:43,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:42:43,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:42:43,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:42:43,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:42:43,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:42:43,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:42:43,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:42:43,426 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 22:42:43,720 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:42:43,735 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:42:43,741 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:42:43,742 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:42:43,743 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:42:43,743 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label25.c [2019-11-06 22:42:43,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9605ae3f2/5232305499474e4fa06f3d0b2e8f06a7/FLAGc18592612 [2019-11-06 22:42:44,397 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:42:44,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label25.c [2019-11-06 22:42:44,420 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9605ae3f2/5232305499474e4fa06f3d0b2e8f06a7/FLAGc18592612 [2019-11-06 22:42:44,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9605ae3f2/5232305499474e4fa06f3d0b2e8f06a7 [2019-11-06 22:42:44,669 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:42:44,670 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:42:44,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:42:44,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:42:44,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:42:44,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:44" (1/1) ... [2019-11-06 22:42:44,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@611855c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:44, skipping insertion in model container [2019-11-06 22:42:44,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:44" (1/1) ... [2019-11-06 22:42:44,686 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:42:44,748 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:42:45,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:42:45,287 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:42:45,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:42:45,427 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:42:45,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:45 WrapperNode [2019-11-06 22:42:45,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:42:45,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:42:45,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:42:45,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:42:45,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:45" (1/1) ... [2019-11-06 22:42:45,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:45" (1/1) ... [2019-11-06 22:42:45,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:45" (1/1) ... [2019-11-06 22:42:45,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:45" (1/1) ... [2019-11-06 22:42:45,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:45" (1/1) ... [2019-11-06 22:42:45,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:45" (1/1) ... [2019-11-06 22:42:45,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:45" (1/1) ... [2019-11-06 22:42:45,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:42:45,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:42:45,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:42:45,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:42:45,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:45" (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 22:42:45,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:42:45,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:42:45,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:42:45,640 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:42:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:42:45,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:42:45,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:42:45,642 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:42:45,643 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:42:45,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:42:45,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:42:47,051 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:42:47,051 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:42:47,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:47 BoogieIcfgContainer [2019-11-06 22:42:47,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:42:47,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:42:47,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:42:47,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:42:47,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:42:44" (1/3) ... [2019-11-06 22:42:47,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b87a973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:47, skipping insertion in model container [2019-11-06 22:42:47,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:45" (2/3) ... [2019-11-06 22:42:47,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b87a973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:47, skipping insertion in model container [2019-11-06 22:42:47,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:47" (3/3) ... [2019-11-06 22:42:47,073 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label25.c [2019-11-06 22:42:47,086 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:42:47,100 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:42:47,115 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:42:47,162 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:42:47,163 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:42:47,165 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:42:47,165 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:42:47,165 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:42:47,166 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:42:47,166 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:42:47,166 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:42:47,206 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 22:42:47,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-06 22:42:47,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:47,228 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, 1, 1, 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 22:42:47,230 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:47,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:47,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1015003737, now seen corresponding path program 1 times [2019-11-06 22:42:47,250 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:47,250 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338830098] [2019-11-06 22:42:47,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:47,727 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 22:42:47,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338830098] [2019-11-06 22:42:47,729 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:47,729 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:42:47,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145930053] [2019-11-06 22:42:47,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:42:47,738 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:47,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:42:47,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:42:47,757 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-11-06 22:42:48,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:48,864 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-11-06 22:42:48,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:42:48,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2019-11-06 22:42:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:48,898 INFO L225 Difference]: With dead ends: 571 [2019-11-06 22:42:48,899 INFO L226 Difference]: Without dead ends: 294 [2019-11-06 22:42:48,911 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 22:42:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-11-06 22:42:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-11-06 22:42:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-11-06 22:42:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 421 transitions. [2019-11-06 22:42:49,027 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 421 transitions. Word has length 70 [2019-11-06 22:42:49,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:49,029 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 421 transitions. [2019-11-06 22:42:49,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:42:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 421 transitions. [2019-11-06 22:42:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-06 22:42:49,043 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:49,044 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, 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] [2019-11-06 22:42:49,044 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:49,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:49,045 INFO L82 PathProgramCache]: Analyzing trace with hash -195666983, now seen corresponding path program 1 times [2019-11-06 22:42:49,046 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:49,046 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039821321] [2019-11-06 22:42:49,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:49,264 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039821321] [2019-11-06 22:42:49,265 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:49,265 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:42:49,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468273171] [2019-11-06 22:42:49,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:42:49,267 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:49,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:42:49,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:42:49,268 INFO L87 Difference]: Start difference. First operand 294 states and 421 transitions. Second operand 6 states. [2019-11-06 22:42:50,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:50,118 INFO L93 Difference]: Finished difference Result 741 states and 1061 transitions. [2019-11-06 22:42:50,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:42:50,119 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2019-11-06 22:42:50,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:50,123 INFO L225 Difference]: With dead ends: 741 [2019-11-06 22:42:50,123 INFO L226 Difference]: Without dead ends: 453 [2019-11-06 22:42:50,124 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 22:42:50,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-11-06 22:42:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2019-11-06 22:42:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-11-06 22:42:50,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 606 transitions. [2019-11-06 22:42:50,148 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 606 transitions. Word has length 139 [2019-11-06 22:42:50,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:50,149 INFO L462 AbstractCegarLoop]: Abstraction has 445 states and 606 transitions. [2019-11-06 22:42:50,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:42:50,149 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 606 transitions. [2019-11-06 22:42:50,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-06 22:42:50,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:50,151 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, 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] [2019-11-06 22:42:50,151 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:50,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:50,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1516573211, now seen corresponding path program 1 times [2019-11-06 22:42:50,152 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:50,152 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080093749] [2019-11-06 22:42:50,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:50,321 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080093749] [2019-11-06 22:42:50,321 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:50,321 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:42:50,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933659300] [2019-11-06 22:42:50,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:42:50,323 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:50,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:42:50,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:42:50,323 INFO L87 Difference]: Start difference. First operand 445 states and 606 transitions. Second operand 4 states. [2019-11-06 22:42:51,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:51,465 INFO L93 Difference]: Finished difference Result 1609 states and 2232 transitions. [2019-11-06 22:42:51,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:42:51,466 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-11-06 22:42:51,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:51,472 INFO L225 Difference]: With dead ends: 1609 [2019-11-06 22:42:51,472 INFO L226 Difference]: Without dead ends: 735 [2019-11-06 22:42:51,475 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 22:42:51,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2019-11-06 22:42:51,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 592. [2019-11-06 22:42:51,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-11-06 22:42:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 801 transitions. [2019-11-06 22:42:51,500 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 801 transitions. Word has length 149 [2019-11-06 22:42:51,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:51,501 INFO L462 AbstractCegarLoop]: Abstraction has 592 states and 801 transitions. [2019-11-06 22:42:51,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:42:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 801 transitions. [2019-11-06 22:42:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-11-06 22:42:51,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:51,505 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, 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] [2019-11-06 22:42:51,505 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:51,505 INFO L82 PathProgramCache]: Analyzing trace with hash 2032612418, now seen corresponding path program 1 times [2019-11-06 22:42:51,506 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:51,506 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104362840] [2019-11-06 22:42:51,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:51,760 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104362840] [2019-11-06 22:42:51,761 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:51,761 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:42:51,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618572489] [2019-11-06 22:42:51,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:42:51,763 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:51,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:42:51,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:42:51,764 INFO L87 Difference]: Start difference. First operand 592 states and 801 transitions. Second operand 6 states. [2019-11-06 22:42:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:52,581 INFO L93 Difference]: Finished difference Result 1492 states and 2064 transitions. [2019-11-06 22:42:52,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:42:52,581 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 192 [2019-11-06 22:42:52,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:52,587 INFO L225 Difference]: With dead ends: 1492 [2019-11-06 22:42:52,587 INFO L226 Difference]: Without dead ends: 906 [2019-11-06 22:42:52,589 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 22:42:52,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2019-11-06 22:42:52,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 890. [2019-11-06 22:42:52,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-11-06 22:42:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1141 transitions. [2019-11-06 22:42:52,618 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1141 transitions. Word has length 192 [2019-11-06 22:42:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:52,619 INFO L462 AbstractCegarLoop]: Abstraction has 890 states and 1141 transitions. [2019-11-06 22:42:52,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:42:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1141 transitions. [2019-11-06 22:42:52,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2019-11-06 22:42:52,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:52,623 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:42:52,623 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:52,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:52,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1889340864, now seen corresponding path program 1 times [2019-11-06 22:42:52,624 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:52,624 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167417462] [2019-11-06 22:42:52,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 204 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:52,900 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167417462] [2019-11-06 22:42:52,900 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244096359] [2019-11-06 22:42:52,900 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 22:42:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:53,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:42:53,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:42:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 22:42:53,157 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:42:53,259 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 126 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:42:53,444 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:42:53,445 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 12 [2019-11-06 22:42:53,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752964926] [2019-11-06 22:42:53,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:42:53,446 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:53,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:42:53,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:42:53,447 INFO L87 Difference]: Start difference. First operand 890 states and 1141 transitions. Second operand 5 states. [2019-11-06 22:42:54,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:54,229 INFO L93 Difference]: Finished difference Result 1943 states and 2493 transitions. [2019-11-06 22:42:54,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:42:54,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 239 [2019-11-06 22:42:54,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:54,236 INFO L225 Difference]: With dead ends: 1943 [2019-11-06 22:42:54,237 INFO L226 Difference]: Without dead ends: 1059 [2019-11-06 22:42:54,239 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:42:54,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2019-11-06 22:42:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1047. [2019-11-06 22:42:54,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1047 states. [2019-11-06 22:42:54,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1325 transitions. [2019-11-06 22:42:54,269 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1325 transitions. Word has length 239 [2019-11-06 22:42:54,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:54,270 INFO L462 AbstractCegarLoop]: Abstraction has 1047 states and 1325 transitions. [2019-11-06 22:42:54,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:42:54,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1325 transitions. [2019-11-06 22:42:54,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-11-06 22:42:54,275 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:54,276 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:42:54,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:42:54,480 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:54,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:54,481 INFO L82 PathProgramCache]: Analyzing trace with hash -122970787, now seen corresponding path program 1 times [2019-11-06 22:42:54,481 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:54,481 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945324465] [2019-11-06 22:42:54,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 261 proven. 82 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-11-06 22:42:55,296 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945324465] [2019-11-06 22:42:55,296 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983830767] [2019-11-06 22:42:55,296 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 22:42:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:55,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:42:55,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:42:55,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 22:42:55,572 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:42:55,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:55,650 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 261 proven. 82 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-11-06 22:42:55,841 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1475600864] [2019-11-06 22:42:55,847 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 310 [2019-11-06 22:42:55,895 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:42:55,895 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:43:00,039 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.