/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_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:44:42,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:44:42,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:44:42,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:44:42,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:44:42,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:44:42,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:44:42,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:44:42,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:44:42,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:44:42,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:44:42,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:44:42,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:44:42,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:44:42,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:44:42,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:44:42,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:44:42,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:44:42,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:44:42,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:44:42,395 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 22:44:42,422 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:44:42,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:44:42,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:44:42,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:44:42,426 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:44:42,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:44:42,427 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:44:42,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:44:42,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:44:42,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:44:42,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:44:42,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:44:42,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:44:42,429 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:44:42,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:44:42,429 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:44:42,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:44:42,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:44:42,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:44:42,430 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:44:42,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:44:42,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:44:42,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:44:42,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:44:42,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:44:42,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:44:42,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:44:42,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:44:42,432 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 22:44:42,717 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:44:42,730 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:44:42,734 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:44:42,735 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:44:42,735 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:44:42,736 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label59.c [2019-11-06 22:44:42,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38518de8f/ac116683beeb4f53ae45475e67ba952e/FLAGd76c7211a [2019-11-06 22:44:43,381 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:44:43,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label59.c [2019-11-06 22:44:43,393 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38518de8f/ac116683beeb4f53ae45475e67ba952e/FLAGd76c7211a [2019-11-06 22:44:43,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38518de8f/ac116683beeb4f53ae45475e67ba952e [2019-11-06 22:44:43,699 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:44:43,701 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:44:43,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:44:43,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:44:43,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:44:43,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:43" (1/1) ... [2019-11-06 22:44:43,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6968dd54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:43, skipping insertion in model container [2019-11-06 22:44:43,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:43" (1/1) ... [2019-11-06 22:44:43,717 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:44:43,778 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:44:44,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:44:44,302 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:44:44,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:44:44,424 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:44:44,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:44 WrapperNode [2019-11-06 22:44:44,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:44:44,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:44:44,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:44:44,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:44:44,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:44" (1/1) ... [2019-11-06 22:44:44,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:44" (1/1) ... [2019-11-06 22:44:44,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:44" (1/1) ... [2019-11-06 22:44:44,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:44" (1/1) ... [2019-11-06 22:44:44,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:44" (1/1) ... [2019-11-06 22:44:44,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:44" (1/1) ... [2019-11-06 22:44:44,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:44" (1/1) ... [2019-11-06 22:44:44,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:44:44,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:44:44,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:44:44,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:44:44,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:44" (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 22:44:44,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:44:44,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:44:44,621 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:44:44,621 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:44:44,622 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:44:44,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:44:44,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:44:44,623 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:44:44,623 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:44:44,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:44:44,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:44:45,978 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:44:45,978 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:44:45,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:45 BoogieIcfgContainer [2019-11-06 22:44:45,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:44:45,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:44:45,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:44:45,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:44:45,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:43" (1/3) ... [2019-11-06 22:44:45,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e571b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:45, skipping insertion in model container [2019-11-06 22:44:45,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:44" (2/3) ... [2019-11-06 22:44:45,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e571b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:45, skipping insertion in model container [2019-11-06 22:44:45,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:45" (3/3) ... [2019-11-06 22:44:45,988 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label59.c [2019-11-06 22:44:46,000 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:44:46,009 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:44:46,024 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:44:46,059 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:44:46,059 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:44:46,060 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:44:46,060 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:44:46,060 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:44:46,060 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:44:46,061 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:44:46,061 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:44:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 22:44:46,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 22:44:46,106 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:46,107 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, 1] [2019-11-06 22:44:46,109 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:46,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:46,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1400340266, now seen corresponding path program 1 times [2019-11-06 22:44:46,124 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:46,125 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228150261] [2019-11-06 22:44:46,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:46,488 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 22:44:46,489 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228150261] [2019-11-06 22:44:46,490 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:46,490 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:44:46,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206224041] [2019-11-06 22:44:46,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:44:46,498 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:46,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:44:46,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:44:46,515 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-11-06 22:44:47,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:47,983 INFO L93 Difference]: Finished difference Result 733 states and 1294 transitions. [2019-11-06 22:44:47,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:44:47,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2019-11-06 22:44:47,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:48,003 INFO L225 Difference]: With dead ends: 733 [2019-11-06 22:44:48,004 INFO L226 Difference]: Without dead ends: 437 [2019-11-06 22:44:48,010 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 22:44:48,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-11-06 22:44:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 294. [2019-11-06 22:44:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-11-06 22:44:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-11-06 22:44:48,078 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 71 [2019-11-06 22:44:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:48,079 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-11-06 22:44:48,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:44:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-11-06 22:44:48,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 22:44:48,085 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:48,085 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:44:48,086 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:48,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:48,086 INFO L82 PathProgramCache]: Analyzing trace with hash 41629170, now seen corresponding path program 1 times [2019-11-06 22:44:48,087 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:48,088 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808402406] [2019-11-06 22:44:48,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 57 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:48,431 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808402406] [2019-11-06 22:44:48,431 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062213436] [2019-11-06 22:44:48,431 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 22:44:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:48,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:44:48,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:44:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:48,639 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:44:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:48,707 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:44:48,707 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-11-06 22:44:48,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961395240] [2019-11-06 22:44:48,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:44:48,727 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:48,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:44:48,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:44:48,728 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 4 states. [2019-11-06 22:44:49,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:49,864 INFO L93 Difference]: Finished difference Result 1154 states and 1795 transitions. [2019-11-06 22:44:49,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:44:49,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2019-11-06 22:44:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:49,873 INFO L225 Difference]: With dead ends: 1154 [2019-11-06 22:44:49,874 INFO L226 Difference]: Without dead ends: 866 [2019-11-06 22:44:49,875 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:44:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2019-11-06 22:44:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2019-11-06 22:44:49,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 866 states. [2019-11-06 22:44:49,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1235 transitions. [2019-11-06 22:44:49,932 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1235 transitions. Word has length 141 [2019-11-06 22:44:49,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:49,933 INFO L462 AbstractCegarLoop]: Abstraction has 866 states and 1235 transitions. [2019-11-06 22:44:49,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:44:49,933 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1235 transitions. [2019-11-06 22:44:49,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 22:44:49,937 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:49,938 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, 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] [2019-11-06 22:44:50,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:44:50,144 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:50,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:50,145 INFO L82 PathProgramCache]: Analyzing trace with hash -395920931, now seen corresponding path program 1 times [2019-11-06 22:44:50,145 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:50,146 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500201948] [2019-11-06 22:44:50,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:50,322 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500201948] [2019-11-06 22:44:50,322 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:50,322 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:44:50,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374603244] [2019-11-06 22:44:50,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:44:50,326 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:50,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:44:50,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:44:50,329 INFO L87 Difference]: Start difference. First operand 866 states and 1235 transitions. Second operand 6 states. [2019-11-06 22:44:51,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:51,257 INFO L93 Difference]: Finished difference Result 1766 states and 2578 transitions. [2019-11-06 22:44:51,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:44:51,258 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-11-06 22:44:51,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:51,265 INFO L225 Difference]: With dead ends: 1766 [2019-11-06 22:44:51,266 INFO L226 Difference]: Without dead ends: 906 [2019-11-06 22:44:51,268 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 22:44:51,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2019-11-06 22:44:51,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 886. [2019-11-06 22:44:51,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2019-11-06 22:44:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1211 transitions. [2019-11-06 22:44:51,310 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1211 transitions. Word has length 152 [2019-11-06 22:44:51,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:51,311 INFO L462 AbstractCegarLoop]: Abstraction has 886 states and 1211 transitions. [2019-11-06 22:44:51,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:44:51,311 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1211 transitions. [2019-11-06 22:44:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-06 22:44:51,315 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:51,315 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, 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] [2019-11-06 22:44:51,315 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:51,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:51,316 INFO L82 PathProgramCache]: Analyzing trace with hash 421403873, now seen corresponding path program 1 times [2019-11-06 22:44:51,316 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:51,316 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362517062] [2019-11-06 22:44:51,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:51,568 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362517062] [2019-11-06 22:44:51,569 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:51,569 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:44:51,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879199556] [2019-11-06 22:44:51,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:44:51,571 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:51,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:44:51,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:44:51,572 INFO L87 Difference]: Start difference. First operand 886 states and 1211 transitions. Second operand 6 states. [2019-11-06 22:44:52,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:52,430 INFO L93 Difference]: Finished difference Result 2394 states and 3478 transitions. [2019-11-06 22:44:52,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:44:52,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 202 [2019-11-06 22:44:52,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:52,444 INFO L225 Difference]: With dead ends: 2394 [2019-11-06 22:44:52,444 INFO L226 Difference]: Without dead ends: 1514 [2019-11-06 22:44:52,448 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 22:44:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2019-11-06 22:44:52,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1482. [2019-11-06 22:44:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1482 states. [2019-11-06 22:44:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 2029 transitions. [2019-11-06 22:44:52,532 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 2029 transitions. Word has length 202 [2019-11-06 22:44:52,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:52,533 INFO L462 AbstractCegarLoop]: Abstraction has 1482 states and 2029 transitions. [2019-11-06 22:44:52,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:44:52,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 2029 transitions. [2019-11-06 22:44:52,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-11-06 22:44:52,538 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:52,538 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, 3, 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] [2019-11-06 22:44:52,538 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:52,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1534813554, now seen corresponding path program 1 times [2019-11-06 22:44:52,539 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:52,539 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860494951] [2019-11-06 22:44:52,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 128 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:44:52,687 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860494951] [2019-11-06 22:44:52,687 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155906910] [2019-11-06 22:44:52,687 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 22:44:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:52,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:44:52,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:44:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-06 22:44:52,874 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:44:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 128 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:44:53,006 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:44:53,006 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-11-06 22:44:53,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468929300] [2019-11-06 22:44:53,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:44:53,008 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:53,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:44:53,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:44:53,008 INFO L87 Difference]: Start difference. First operand 1482 states and 2029 transitions. Second operand 5 states. [2019-11-06 22:44:53,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:53,956 INFO L93 Difference]: Finished difference Result 4019 states and 5739 transitions. [2019-11-06 22:44:53,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:44:53,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2019-11-06 22:44:53,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:53,982 INFO L225 Difference]: With dead ends: 4019 [2019-11-06 22:44:53,982 INFO L226 Difference]: Without dead ends: 2543 [2019-11-06 22:44:53,987 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:44:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2019-11-06 22:44:54,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2509. [2019-11-06 22:44:54,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2509 states. [2019-11-06 22:44:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3402 transitions. [2019-11-06 22:44:54,072 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3402 transitions. Word has length 221 [2019-11-06 22:44:54,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:54,073 INFO L462 AbstractCegarLoop]: Abstraction has 2509 states and 3402 transitions. [2019-11-06 22:44:54,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:44:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3402 transitions. [2019-11-06 22:44:54,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-11-06 22:44:54,079 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:54,079 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, 3, 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] [2019-11-06 22:44:54,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:44:54,285 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:54,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:54,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1716693714, now seen corresponding path program 1 times [2019-11-06 22:44:54,286 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:54,286 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289988028] [2019-11-06 22:44:54,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 9 proven. 125 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 22:44:54,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289988028] [2019-11-06 22:44:54,668 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795602372] [2019-11-06 22:44:54,668 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 22:44:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:54,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:44:54,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:44:54,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:44:54,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:44:54,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:44:54,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:44:54,846 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:44:54,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:44:54,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:44:54,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:44:54,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:44:54,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:44:54,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:44:54,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:44:54,865 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:45:06,514 WARN L191 SmtUtils]: Spent 11.58 s on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2019-11-06 22:45:06,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:45:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 131 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:06,851 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:45:07,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:45:07,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:45:07,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:45:07,018 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:45:07,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:45:07,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:45:07,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:45:07,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:45:07,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:45:07,059 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:45:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 131 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:07,181 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [247383638] [2019-11-06 22:45:07,188 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 228 [2019-11-06 22:45:07,267 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:45:07,267 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:45:11,547 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.