/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_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:55:12,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:55:12,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:55:12,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:55:12,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:55:12,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:55:12,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:55:12,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:55:12,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:55:12,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:55:12,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:55:12,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:55:12,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:55:12,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:55:12,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:55:12,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:55:12,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:55:12,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:55:12,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:55:12,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:55:12,718 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 22:55:12,754 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:55:12,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:55:12,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:55:12,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:55:12,758 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:55:12,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:55:12,758 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:55:12,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:55:12,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:55:12,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:55:12,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:55:12,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:55:12,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:55:12,761 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:55:12,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:55:12,761 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:55:12,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:55:12,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:55:12,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:55:12,763 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:55:12,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:55:12,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:55:12,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:55:12,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:55:12,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:55:12,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:55:12,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:55:12,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:55:12,765 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 22:55:13,038 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:55:13,051 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:55:13,055 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:55:13,056 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:55:13,056 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:55:13,057 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label34.c [2019-11-06 22:55:13,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06da45f61/91368385a7d14c3480fba55bcf0592e6/FLAG88da444db [2019-11-06 22:55:13,761 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:55:13,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label34.c [2019-11-06 22:55:13,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06da45f61/91368385a7d14c3480fba55bcf0592e6/FLAG88da444db [2019-11-06 22:55:13,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06da45f61/91368385a7d14c3480fba55bcf0592e6 [2019-11-06 22:55:13,958 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:55:13,959 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:55:13,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:13,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:55:13,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:55:13,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:13" (1/1) ... [2019-11-06 22:55:13,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67b930ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:13, skipping insertion in model container [2019-11-06 22:55:13,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:13" (1/1) ... [2019-11-06 22:55:13,976 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:55:14,060 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:55:14,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:14,943 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:55:15,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:15,304 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:55:15,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:15 WrapperNode [2019-11-06 22:55:15,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:15,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:55:15,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:55:15,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:55:15,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:15" (1/1) ... [2019-11-06 22:55:15,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:15" (1/1) ... [2019-11-06 22:55:15,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:15" (1/1) ... [2019-11-06 22:55:15,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:15" (1/1) ... [2019-11-06 22:55:15,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:15" (1/1) ... [2019-11-06 22:55:15,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:15" (1/1) ... [2019-11-06 22:55:15,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:15" (1/1) ... [2019-11-06 22:55:15,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:55:15,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:55:15,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:55:15,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:55:15,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:15" (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 22:55:15,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:55:15,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:55:15,557 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:55:15,557 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:55:15,557 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:55:15,557 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:55:15,557 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:55:15,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:55:15,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:55:15,558 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:55:15,558 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:55:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:55:15,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:55:17,791 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:55:17,792 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:55:17,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:17 BoogieIcfgContainer [2019-11-06 22:55:17,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:55:17,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:55:17,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:55:17,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:55:17,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:55:13" (1/3) ... [2019-11-06 22:55:17,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487588fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:17, skipping insertion in model container [2019-11-06 22:55:17,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:15" (2/3) ... [2019-11-06 22:55:17,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487588fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:17, skipping insertion in model container [2019-11-06 22:55:17,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:17" (3/3) ... [2019-11-06 22:55:17,813 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label34.c [2019-11-06 22:55:17,824 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:55:17,836 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:55:17,847 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:55:17,895 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:55:17,895 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:55:17,895 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:55:17,895 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:55:17,896 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:55:17,896 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:55:17,897 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:55:17,897 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:55:17,934 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:55:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 22:55:17,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:17,944 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] [2019-11-06 22:55:17,946 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:17,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:17,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1472830021, now seen corresponding path program 1 times [2019-11-06 22:55:17,962 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:17,962 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133904756] [2019-11-06 22:55:17,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:18,201 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 22:55:18,202 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133904756] [2019-11-06 22:55:18,202 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:18,203 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:55:18,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059175279] [2019-11-06 22:55:18,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:55:18,210 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:18,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:55:18,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:55:18,227 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:55:20,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:20,692 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:55:20,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:55:20,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-06 22:55:20,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:20,719 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:55:20,720 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:55:20,731 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 22:55:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:55:20,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:55:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:55:20,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-11-06 22:55:20,843 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 40 [2019-11-06 22:55:20,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:20,843 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-11-06 22:55:20,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:55:20,844 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-11-06 22:55:20,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-06 22:55:20,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:20,853 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:20,854 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:20,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:20,855 INFO L82 PathProgramCache]: Analyzing trace with hash -992835623, now seen corresponding path program 1 times [2019-11-06 22:55:20,855 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:20,855 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483200847] [2019-11-06 22:55:20,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:21,092 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483200847] [2019-11-06 22:55:21,092 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:21,092 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:55:21,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410898557] [2019-11-06 22:55:21,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:55:21,095 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:21,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:55:21,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:55:21,096 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 5 states. [2019-11-06 22:55:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:25,641 INFO L93 Difference]: Finished difference Result 2066 states and 3624 transitions. [2019-11-06 22:55:25,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:25,642 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2019-11-06 22:55:25,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:25,660 INFO L225 Difference]: With dead ends: 2066 [2019-11-06 22:55:25,660 INFO L226 Difference]: Without dead ends: 1390 [2019-11-06 22:55:25,664 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 22:55:25,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2019-11-06 22:55:25,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1372. [2019-11-06 22:55:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-11-06 22:55:25,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2268 transitions. [2019-11-06 22:55:25,727 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2268 transitions. Word has length 109 [2019-11-06 22:55:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:25,728 INFO L462 AbstractCegarLoop]: Abstraction has 1372 states and 2268 transitions. [2019-11-06 22:55:25,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:55:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2268 transitions. [2019-11-06 22:55:25,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 22:55:25,732 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:25,732 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:25,732 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:25,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1697451860, now seen corresponding path program 1 times [2019-11-06 22:55:25,733 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:25,733 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68461305] [2019-11-06 22:55:25,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:25,987 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68461305] [2019-11-06 22:55:25,987 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:25,987 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:55:25,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793224242] [2019-11-06 22:55:25,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:55:25,989 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:25,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:55:25,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:25,989 INFO L87 Difference]: Start difference. First operand 1372 states and 2268 transitions. Second operand 6 states. [2019-11-06 22:55:29,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:29,004 INFO L93 Difference]: Finished difference Result 3472 states and 5791 transitions. [2019-11-06 22:55:29,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:29,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2019-11-06 22:55:29,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:29,026 INFO L225 Difference]: With dead ends: 3472 [2019-11-06 22:55:29,027 INFO L226 Difference]: Without dead ends: 2106 [2019-11-06 22:55:29,031 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 22:55:29,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-11-06 22:55:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2081. [2019-11-06 22:55:29,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-11-06 22:55:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3263 transitions. [2019-11-06 22:55:29,127 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3263 transitions. Word has length 138 [2019-11-06 22:55:29,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:29,129 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3263 transitions. [2019-11-06 22:55:29,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:55:29,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3263 transitions. [2019-11-06 22:55:29,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-06 22:55:29,137 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:29,138 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:29,138 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:29,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:29,138 INFO L82 PathProgramCache]: Analyzing trace with hash 41208360, now seen corresponding path program 1 times [2019-11-06 22:55:29,140 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:29,140 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111408248] [2019-11-06 22:55:29,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:29,436 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111408248] [2019-11-06 22:55:29,436 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:29,436 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:55:29,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691862889] [2019-11-06 22:55:29,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:55:29,437 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:29,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:55:29,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:29,438 INFO L87 Difference]: Start difference. First operand 2081 states and 3263 transitions. Second operand 6 states. [2019-11-06 22:55:31,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:31,848 INFO L93 Difference]: Finished difference Result 5241 states and 8253 transitions. [2019-11-06 22:55:31,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:31,853 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2019-11-06 22:55:31,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:31,870 INFO L225 Difference]: With dead ends: 5241 [2019-11-06 22:55:31,870 INFO L226 Difference]: Without dead ends: 3166 [2019-11-06 22:55:31,876 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 22:55:31,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2019-11-06 22:55:31,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 3140. [2019-11-06 22:55:31,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3140 states. [2019-11-06 22:55:31,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4128 transitions. [2019-11-06 22:55:31,958 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4128 transitions. Word has length 156 [2019-11-06 22:55:31,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:31,959 INFO L462 AbstractCegarLoop]: Abstraction has 3140 states and 4128 transitions. [2019-11-06 22:55:31,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:55:31,959 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4128 transitions. [2019-11-06 22:55:31,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-11-06 22:55:31,962 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:31,963 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 22:55:31,963 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:31,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1270458365, now seen corresponding path program 1 times [2019-11-06 22:55:31,964 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:31,964 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900932814] [2019-11-06 22:55:31,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 99 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:55:32,121 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900932814] [2019-11-06 22:55:32,122 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835939839] [2019-11-06 22:55:32,122 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 22:55:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:32,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:55:32,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 22:55:32,436 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 22:55:32,528 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:55:32,529 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-11-06 22:55:32,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636244634] [2019-11-06 22:55:32,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:55:32,532 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:32,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:55:32,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:55:32,533 INFO L87 Difference]: Start difference. First operand 3140 states and 4128 transitions. Second operand 4 states. [2019-11-06 22:55:35,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:35,275 INFO L93 Difference]: Finished difference Result 7976 states and 10525 transitions. [2019-11-06 22:55:35,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:55:35,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 238 [2019-11-06 22:55:35,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:35,303 INFO L225 Difference]: With dead ends: 7976 [2019-11-06 22:55:35,304 INFO L226 Difference]: Without dead ends: 4842 [2019-11-06 22:55:35,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 477 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 22:55:35,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4842 states. [2019-11-06 22:55:35,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4842 to 4501. [2019-11-06 22:55:35,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4501 states. [2019-11-06 22:55:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 5661 transitions. [2019-11-06 22:55:35,433 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 5661 transitions. Word has length 238 [2019-11-06 22:55:35,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:35,434 INFO L462 AbstractCegarLoop]: Abstraction has 4501 states and 5661 transitions. [2019-11-06 22:55:35,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:55:35,435 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 5661 transitions. [2019-11-06 22:55:35,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2019-11-06 22:55:35,446 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:35,447 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, 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, 3, 3, 3, 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] [2019-11-06 22:55:35,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:35,652 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:35,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1802866035, now seen corresponding path program 1 times [2019-11-06 22:55:35,654 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:35,654 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123482529] [2019-11-06 22:55:35,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 216 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-06 22:55:36,173 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123482529] [2019-11-06 22:55:36,173 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091426943] [2019-11-06 22:55:36,174 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 22:55:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:36,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:55:36,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 422 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 22:55:36,575 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 216 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-06 22:55:36,834 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1688773793] [2019-11-06 22:55:36,840 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 458 [2019-11-06 22:55:36,895 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:55:36,895 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:55:47,190 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:55:47,192 INFO L272 AbstractInterpreter]: Visited 179 different actions 179 times. Never merged. Never widened. Performed 350 root evaluator evaluations with a maximum evaluation depth of 14. Performed 350 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-11-06 22:55:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:47,196 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates