/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/Problem16_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:56:02,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:56:02,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:56:02,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:56:02,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:56:02,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:56:02,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:56:02,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:56:02,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:56:02,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:56:02,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:56:02,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:56:02,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:56:02,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:56:02,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:56:02,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:56:02,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:56:02,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:56:02,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:56:02,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:56:02,403 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 22:56:02,417 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:56:02,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:56:02,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:56:02,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:56:02,419 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:56:02,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:56:02,419 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:56:02,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:56:02,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:56:02,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:56:02,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:56:02,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:56:02,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:56:02,421 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:56:02,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:56:02,421 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:56:02,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:56:02,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:56:02,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:56:02,422 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:56:02,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:56:02,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:56:02,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:56:02,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:56:02,423 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:56:02,423 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:56:02,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:56:02,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:56:02,424 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 22:56:02,693 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:56:02,712 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:56:02,716 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:56:02,717 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:56:02,718 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:56:02,718 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label53.c [2019-11-06 22:56:02,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97c7be23f/d33cb02cb13943c8b207eea981cb3388/FLAGe4fa35b88 [2019-11-06 22:56:03,479 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:56:03,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label53.c [2019-11-06 22:56:03,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97c7be23f/d33cb02cb13943c8b207eea981cb3388/FLAGe4fa35b88 [2019-11-06 22:56:03,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97c7be23f/d33cb02cb13943c8b207eea981cb3388 [2019-11-06 22:56:03,717 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:56:03,719 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:56:03,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:56:03,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:56:03,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:56:03,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:03" (1/1) ... [2019-11-06 22:56:03,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a23c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:03, skipping insertion in model container [2019-11-06 22:56:03,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:03" (1/1) ... [2019-11-06 22:56:03,736 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:56:03,818 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:56:04,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:56:04,636 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:56:05,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:56:05,044 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:56:05,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05 WrapperNode [2019-11-06 22:56:05,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:56:05,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:56:05,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:56:05,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:56:05,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (1/1) ... [2019-11-06 22:56:05,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (1/1) ... [2019-11-06 22:56:05,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (1/1) ... [2019-11-06 22:56:05,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (1/1) ... [2019-11-06 22:56:05,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (1/1) ... [2019-11-06 22:56:05,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (1/1) ... [2019-11-06 22:56:05,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (1/1) ... [2019-11-06 22:56:05,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:56:05,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:56:05,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:56:05,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:56:05,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (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 22:56:05,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:56:05,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:56:05,295 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:56:05,296 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:56:05,296 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:56:05,297 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:56:05,297 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:56:05,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:56:05,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:56:05,298 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:56:05,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:56:05,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:56:05,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:56:07,718 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:56:07,719 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:56:07,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:07 BoogieIcfgContainer [2019-11-06 22:56:07,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:56:07,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:56:07,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:56:07,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:56:07,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:56:03" (1/3) ... [2019-11-06 22:56:07,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ad5f12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:07, skipping insertion in model container [2019-11-06 22:56:07,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (2/3) ... [2019-11-06 22:56:07,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ad5f12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:07, skipping insertion in model container [2019-11-06 22:56:07,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:07" (3/3) ... [2019-11-06 22:56:07,729 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label53.c [2019-11-06 22:56:07,739 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:56:07,748 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:56:07,760 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:56:07,794 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:56:07,795 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:56:07,795 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:56:07,795 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:56:07,795 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:56:07,795 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:56:07,795 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:56:07,796 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:56:07,828 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:56:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 22:56:07,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:07,840 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] [2019-11-06 22:56:07,842 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:07,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:07,848 INFO L82 PathProgramCache]: Analyzing trace with hash -302324190, now seen corresponding path program 1 times [2019-11-06 22:56:07,860 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:07,860 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470358593] [2019-11-06 22:56:07,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:08,198 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 22:56:08,199 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470358593] [2019-11-06 22:56:08,200 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:08,200 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:56:08,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56294772] [2019-11-06 22:56:08,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:56:08,211 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:08,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:56:08,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:56:08,228 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:56:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:10,588 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:56:10,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:56:10,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-11-06 22:56:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:10,611 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:56:10,611 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:56:10,621 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 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 22:56:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:56:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:56:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:56:10,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-11-06 22:56:10,722 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 43 [2019-11-06 22:56:10,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:10,722 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-11-06 22:56:10,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:56:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-11-06 22:56:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 22:56:10,728 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:10,729 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:10,729 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:10,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:10,730 INFO L82 PathProgramCache]: Analyzing trace with hash 204114703, now seen corresponding path program 1 times [2019-11-06 22:56:10,730 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:10,730 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036375969] [2019-11-06 22:56:10,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:10,943 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036375969] [2019-11-06 22:56:10,943 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:10,944 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:56:10,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165488743] [2019-11-06 22:56:10,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:56:10,946 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:10,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:56:10,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:56:10,947 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 5 states. [2019-11-06 22:56:13,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:13,781 INFO L93 Difference]: Finished difference Result 2066 states and 3624 transitions. [2019-11-06 22:56:13,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:13,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2019-11-06 22:56:13,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:13,793 INFO L225 Difference]: With dead ends: 2066 [2019-11-06 22:56:13,794 INFO L226 Difference]: Without dead ends: 1390 [2019-11-06 22:56:13,797 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:56:13,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2019-11-06 22:56:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1372. [2019-11-06 22:56:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-11-06 22:56:13,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2268 transitions. [2019-11-06 22:56:13,857 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2268 transitions. Word has length 112 [2019-11-06 22:56:13,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:13,859 INFO L462 AbstractCegarLoop]: Abstraction has 1372 states and 2268 transitions. [2019-11-06 22:56:13,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:56:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2268 transitions. [2019-11-06 22:56:13,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 22:56:13,873 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:13,873 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:13,873 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:13,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:13,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1530346758, now seen corresponding path program 1 times [2019-11-06 22:56:13,875 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:13,875 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52534154] [2019-11-06 22:56:13,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:14,121 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52534154] [2019-11-06 22:56:14,122 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:14,122 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:56:14,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535065266] [2019-11-06 22:56:14,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:56:14,123 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:14,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:56:14,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:56:14,124 INFO L87 Difference]: Start difference. First operand 1372 states and 2268 transitions. Second operand 6 states. [2019-11-06 22:56:16,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:16,748 INFO L93 Difference]: Finished difference Result 3472 states and 5791 transitions. [2019-11-06 22:56:16,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:16,750 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-11-06 22:56:16,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:16,768 INFO L225 Difference]: With dead ends: 3472 [2019-11-06 22:56:16,769 INFO L226 Difference]: Without dead ends: 2106 [2019-11-06 22:56:16,773 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 22:56:16,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-11-06 22:56:16,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2081. [2019-11-06 22:56:16,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-11-06 22:56:16,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3263 transitions. [2019-11-06 22:56:16,911 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3263 transitions. Word has length 141 [2019-11-06 22:56:16,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:16,912 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3263 transitions. [2019-11-06 22:56:16,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:56:16,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3263 transitions. [2019-11-06 22:56:16,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-06 22:56:16,921 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:16,921 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:16,922 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:16,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:16,922 INFO L82 PathProgramCache]: Analyzing trace with hash 225402430, now seen corresponding path program 1 times [2019-11-06 22:56:16,923 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:16,926 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237952008] [2019-11-06 22:56:16,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:17,221 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237952008] [2019-11-06 22:56:17,221 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:17,221 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:56:17,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677219345] [2019-11-06 22:56:17,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:56:17,223 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:17,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:56:17,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:56:17,224 INFO L87 Difference]: Start difference. First operand 2081 states and 3263 transitions. Second operand 6 states. [2019-11-06 22:56:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:19,711 INFO L93 Difference]: Finished difference Result 5241 states and 8253 transitions. [2019-11-06 22:56:19,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:19,716 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-11-06 22:56:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:19,736 INFO L225 Difference]: With dead ends: 5241 [2019-11-06 22:56:19,736 INFO L226 Difference]: Without dead ends: 3166 [2019-11-06 22:56:19,742 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 22:56:19,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2019-11-06 22:56:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 3140. [2019-11-06 22:56:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3140 states. [2019-11-06 22:56:19,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4128 transitions. [2019-11-06 22:56:19,826 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4128 transitions. Word has length 159 [2019-11-06 22:56:19,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:19,828 INFO L462 AbstractCegarLoop]: Abstraction has 3140 states and 4128 transitions. [2019-11-06 22:56:19,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:56:19,828 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4128 transitions. [2019-11-06 22:56:19,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-11-06 22:56:19,832 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:19,833 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:56:19,833 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:19,833 INFO L82 PathProgramCache]: Analyzing trace with hash -786182774, now seen corresponding path program 1 times [2019-11-06 22:56:19,834 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:19,834 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195720721] [2019-11-06 22:56:19,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 102 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:56:20,049 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195720721] [2019-11-06 22:56:20,049 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776045394] [2019-11-06 22:56:20,049 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 22:56:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:20,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:56:20,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 22:56:20,275 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 22:56:20,413 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:56:20,413 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-11-06 22:56:20,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832185927] [2019-11-06 22:56:20,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:56:20,415 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:20,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:56:20,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:56:20,417 INFO L87 Difference]: Start difference. First operand 3140 states and 4128 transitions. Second operand 4 states. [2019-11-06 22:56:22,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:22,896 INFO L93 Difference]: Finished difference Result 7285 states and 9429 transitions. [2019-11-06 22:56:22,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:56:22,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2019-11-06 22:56:22,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:22,915 INFO L225 Difference]: With dead ends: 7285 [2019-11-06 22:56:22,915 INFO L226 Difference]: Without dead ends: 4151 [2019-11-06 22:56:22,922 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:56:22,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2019-11-06 22:56:23,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3814. [2019-11-06 22:56:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3814 states. [2019-11-06 22:56:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3814 states to 3814 states and 4789 transitions. [2019-11-06 22:56:23,016 INFO L78 Accepts]: Start accepts. Automaton has 3814 states and 4789 transitions. Word has length 241 [2019-11-06 22:56:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:23,017 INFO L462 AbstractCegarLoop]: Abstraction has 3814 states and 4789 transitions. [2019-11-06 22:56:23,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:56:23,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3814 states and 4789 transitions. [2019-11-06 22:56:23,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2019-11-06 22:56:23,026 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:23,026 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:56:23,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:23,232 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:23,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:23,233 INFO L82 PathProgramCache]: Analyzing trace with hash -555703454, now seen corresponding path program 1 times [2019-11-06 22:56:23,233 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:23,233 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643068614] [2019-11-06 22:56:23,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:23,607 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 225 proven. 115 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-06 22:56:23,608 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643068614] [2019-11-06 22:56:23,608 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010869834] [2019-11-06 22:56:23,608 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 22:56:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:23,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:56:23,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 415 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 22:56:23,915 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 225 proven. 115 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-06 22:56:24,117 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1930101850] [2019-11-06 22:56:24,123 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 404 [2019-11-06 22:56:24,188 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:56:24,188 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:56:32,023 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:56:32,025 INFO L272 AbstractInterpreter]: Visited 135 different actions 135 times. Never merged. Never widened. Performed 307 root evaluator evaluations with a maximum evaluation depth of 14. Performed 307 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-11-06 22:56:32,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:32,029 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates