/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_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:55:16,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:55:16,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:55:16,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:55:16,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:55:16,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:55:16,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:55:16,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:55:16,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:55:16,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:55:16,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:55:16,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:55:16,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:55:16,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:55:16,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:55:16,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:55:16,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:55:16,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:55:16,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:55:16,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:55:16,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:55:16,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:55:16,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:55:16,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:55:16,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:55:16,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:55:16,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:55:16,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:55:16,605 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 22:55:16,623 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:55:16,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:55:16,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:55:16,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:55:16,625 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:55:16,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:55:16,626 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:55:16,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:55:16,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:55:16,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:55:16,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:55:16,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:55:16,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:55:16,627 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:55:16,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:55:16,627 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:55:16,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:55:16,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:55:16,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:55:16,628 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:55:16,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:55:16,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:55:16,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:55:16,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:55:16,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:55:16,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:55:16,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:55:16,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:55:16,630 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 22:55:16,947 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:55:16,965 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:55:16,968 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:55:16,969 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:55:16,970 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:55:16,970 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label35.c [2019-11-06 22:55:17,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50cedd210/e7800cd9b8f947e9a538f1e8c312d229/FLAG766e0fdf2 [2019-11-06 22:55:17,736 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:55:17,737 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label35.c [2019-11-06 22:55:17,761 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50cedd210/e7800cd9b8f947e9a538f1e8c312d229/FLAG766e0fdf2 [2019-11-06 22:55:17,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50cedd210/e7800cd9b8f947e9a538f1e8c312d229 [2019-11-06 22:55:17,872 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:55:17,873 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:55:17,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:17,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:55:17,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:55:17,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:17" (1/1) ... [2019-11-06 22:55:17,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36629faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:17, skipping insertion in model container [2019-11-06 22:55:17,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:17" (1/1) ... [2019-11-06 22:55:17,890 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:55:17,967 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:55:18,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:18,916 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:55:19,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:19,337 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:55:19,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:19 WrapperNode [2019-11-06 22:55:19,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:19,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:55:19,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:55:19,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:55:19,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:19" (1/1) ... [2019-11-06 22:55:19,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:19" (1/1) ... [2019-11-06 22:55:19,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:19" (1/1) ... [2019-11-06 22:55:19,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:19" (1/1) ... [2019-11-06 22:55:19,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:19" (1/1) ... [2019-11-06 22:55:19,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:19" (1/1) ... [2019-11-06 22:55:19,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:19" (1/1) ... [2019-11-06 22:55:19,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:55:19,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:55:19,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:55:19,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:55:19,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:19" (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 22:55:19,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:55:19,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:55:19,614 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:55:19,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:55:19,615 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:55:19,616 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:55:19,616 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:55:19,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:55:19,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:55:19,617 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:55:19,617 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:55:19,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:55:19,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:55:21,957 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:55:21,957 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:55:21,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:21 BoogieIcfgContainer [2019-11-06 22:55:21,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:55:21,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:55:21,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:55:21,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:55:21,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:55:17" (1/3) ... [2019-11-06 22:55:21,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65bee5a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:21, skipping insertion in model container [2019-11-06 22:55:21,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:19" (2/3) ... [2019-11-06 22:55:21,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65bee5a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:21, skipping insertion in model container [2019-11-06 22:55:21,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:21" (3/3) ... [2019-11-06 22:55:21,968 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label35.c [2019-11-06 22:55:21,978 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:55:21,988 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:55:22,000 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:55:22,030 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:55:22,031 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:55:22,031 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:55:22,031 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:55:22,031 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:55:22,032 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:55:22,032 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:55:22,032 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:55:22,060 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:55:22,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 22:55:22,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:22,070 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:55:22,071 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:22,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:22,078 INFO L82 PathProgramCache]: Analyzing trace with hash 338381554, now seen corresponding path program 1 times [2019-11-06 22:55:22,088 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:22,088 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088396802] [2019-11-06 22:55:22,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:22,513 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 22:55:22,514 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088396802] [2019-11-06 22:55:22,515 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:22,515 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:55:22,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695123395] [2019-11-06 22:55:22,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:55:22,523 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:22,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:55:22,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:55:22,541 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-11-06 22:55:26,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:26,829 INFO L93 Difference]: Finished difference Result 1509 states and 2834 transitions. [2019-11-06 22:55:26,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:55:26,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-11-06 22:55:26,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:26,863 INFO L225 Difference]: With dead ends: 1509 [2019-11-06 22:55:26,864 INFO L226 Difference]: Without dead ends: 1019 [2019-11-06 22:55:26,875 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:55:26,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-11-06 22:55:26,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 682. [2019-11-06 22:55:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:55:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-11-06 22:55:26,980 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 47 [2019-11-06 22:55:26,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:26,980 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-11-06 22:55:26,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:55:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-11-06 22:55:26,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-06 22:55:26,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:26,987 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:26,987 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:26,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:26,988 INFO L82 PathProgramCache]: Analyzing trace with hash -8457825, now seen corresponding path program 1 times [2019-11-06 22:55:26,988 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:26,989 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483200847] [2019-11-06 22:55:26,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:27,209 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483200847] [2019-11-06 22:55:27,210 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:27,210 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:55:27,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198993893] [2019-11-06 22:55:27,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:55:27,212 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:27,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:55:27,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:55:27,213 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 5 states. [2019-11-06 22:55:30,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:30,308 INFO L93 Difference]: Finished difference Result 2068 states and 3645 transitions. [2019-11-06 22:55:30,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:30,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2019-11-06 22:55:30,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:30,321 INFO L225 Difference]: With dead ends: 2068 [2019-11-06 22:55:30,322 INFO L226 Difference]: Without dead ends: 1392 [2019-11-06 22:55:30,324 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 22:55:30,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2019-11-06 22:55:30,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1374. [2019-11-06 22:55:30,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1374 states. [2019-11-06 22:55:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2277 transitions. [2019-11-06 22:55:30,412 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2277 transitions. Word has length 116 [2019-11-06 22:55:30,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:30,412 INFO L462 AbstractCegarLoop]: Abstraction has 1374 states and 2277 transitions. [2019-11-06 22:55:30,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:55:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2277 transitions. [2019-11-06 22:55:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-06 22:55:30,417 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:30,418 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:30,418 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:30,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:30,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1750756938, now seen corresponding path program 1 times [2019-11-06 22:55:30,419 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:30,419 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671553517] [2019-11-06 22:55:30,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:30,639 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671553517] [2019-11-06 22:55:30,639 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:30,640 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:55:30,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635765221] [2019-11-06 22:55:30,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:55:30,641 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:30,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:55:30,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:30,642 INFO L87 Difference]: Start difference. First operand 1374 states and 2277 transitions. Second operand 6 states. [2019-11-06 22:55:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:33,505 INFO L93 Difference]: Finished difference Result 3463 states and 5746 transitions. [2019-11-06 22:55:33,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:33,510 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-11-06 22:55:33,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:33,526 INFO L225 Difference]: With dead ends: 3463 [2019-11-06 22:55:33,526 INFO L226 Difference]: Without dead ends: 2095 [2019-11-06 22:55:33,529 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 22:55:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2019-11-06 22:55:33,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 2077. [2019-11-06 22:55:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2019-11-06 22:55:33,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3299 transitions. [2019-11-06 22:55:33,602 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3299 transitions. Word has length 119 [2019-11-06 22:55:33,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:33,602 INFO L462 AbstractCegarLoop]: Abstraction has 2077 states and 3299 transitions. [2019-11-06 22:55:33,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:55:33,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3299 transitions. [2019-11-06 22:55:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 22:55:33,605 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:33,606 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:33,606 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:33,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:33,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1833499239, now seen corresponding path program 1 times [2019-11-06 22:55:33,607 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:33,607 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178492896] [2019-11-06 22:55:33,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:33,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178492896] [2019-11-06 22:55:33,744 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:33,744 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:55:33,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743889546] [2019-11-06 22:55:33,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:55:33,745 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:33,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:55:33,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:33,746 INFO L87 Difference]: Start difference. First operand 2077 states and 3299 transitions. Second operand 6 states. [2019-11-06 22:55:36,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:36,147 INFO L93 Difference]: Finished difference Result 4874 states and 7768 transitions. [2019-11-06 22:55:36,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:36,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2019-11-06 22:55:36,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:36,171 INFO L225 Difference]: With dead ends: 4874 [2019-11-06 22:55:36,171 INFO L226 Difference]: Without dead ends: 2803 [2019-11-06 22:55:36,178 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 22:55:36,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2019-11-06 22:55:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 2790. [2019-11-06 22:55:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2790 states. [2019-11-06 22:55:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 4061 transitions. [2019-11-06 22:55:36,295 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 4061 transitions. Word has length 120 [2019-11-06 22:55:36,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:36,296 INFO L462 AbstractCegarLoop]: Abstraction has 2790 states and 4061 transitions. [2019-11-06 22:55:36,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:55:36,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 4061 transitions. [2019-11-06 22:55:36,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 22:55:36,300 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:36,300 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:36,301 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:36,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:36,301 INFO L82 PathProgramCache]: Analyzing trace with hash 2059459070, now seen corresponding path program 1 times [2019-11-06 22:55:36,301 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:36,302 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623785454] [2019-11-06 22:55:36,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:36,444 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623785454] [2019-11-06 22:55:36,445 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:36,445 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:55:36,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238118804] [2019-11-06 22:55:36,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:55:36,447 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:36,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:55:36,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:36,448 INFO L87 Difference]: Start difference. First operand 2790 states and 4061 transitions. Second operand 6 states. [2019-11-06 22:55:39,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:39,276 INFO L93 Difference]: Finished difference Result 7362 states and 11039 transitions. [2019-11-06 22:55:39,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:55:39,277 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-11-06 22:55:39,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:39,301 INFO L225 Difference]: With dead ends: 7362 [2019-11-06 22:55:39,302 INFO L226 Difference]: Without dead ends: 4578 [2019-11-06 22:55:39,311 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:55:39,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4578 states. [2019-11-06 22:55:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4578 to 4526. [2019-11-06 22:55:39,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4526 states. [2019-11-06 22:55:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4526 states to 4526 states and 6572 transitions. [2019-11-06 22:55:39,452 INFO L78 Accepts]: Start accepts. Automaton has 4526 states and 6572 transitions. Word has length 123 [2019-11-06 22:55:39,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:39,453 INFO L462 AbstractCegarLoop]: Abstraction has 4526 states and 6572 transitions. [2019-11-06 22:55:39,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:55:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 4526 states and 6572 transitions. [2019-11-06 22:55:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-06 22:55:39,455 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:39,455 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:39,455 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:39,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:39,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1922288270, now seen corresponding path program 1 times [2019-11-06 22:55:39,456 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:39,456 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606918293] [2019-11-06 22:55:39,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:39,613 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606918293] [2019-11-06 22:55:39,613 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:39,613 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:55:39,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094315418] [2019-11-06 22:55:39,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:55:39,614 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:39,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:55:39,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:39,615 INFO L87 Difference]: Start difference. First operand 4526 states and 6572 transitions. Second operand 6 states. [2019-11-06 22:55:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:42,041 INFO L93 Difference]: Finished difference Result 12150 states and 17943 transitions. [2019-11-06 22:55:42,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:42,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2019-11-06 22:55:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:42,082 INFO L225 Difference]: With dead ends: 12150 [2019-11-06 22:55:42,082 INFO L226 Difference]: Without dead ends: 7630 [2019-11-06 22:55:42,095 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 22:55:42,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7630 states. [2019-11-06 22:55:42,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7630 to 6239. [2019-11-06 22:55:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6239 states. [2019-11-06 22:55:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6239 states to 6239 states and 8457 transitions. [2019-11-06 22:55:42,246 INFO L78 Accepts]: Start accepts. Automaton has 6239 states and 8457 transitions. Word has length 131 [2019-11-06 22:55:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:42,246 INFO L462 AbstractCegarLoop]: Abstraction has 6239 states and 8457 transitions. [2019-11-06 22:55:42,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:55:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 6239 states and 8457 transitions. [2019-11-06 22:55:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 22:55:42,248 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:42,248 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:42,248 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:42,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1219597803, now seen corresponding path program 1 times [2019-11-06 22:55:42,253 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:42,253 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276817002] [2019-11-06 22:55:42,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:55:42,426 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276817002] [2019-11-06 22:55:42,435 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401014549] [2019-11-06 22:55:42,435 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 22:55:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:42,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:55:42,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:42,709 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:42,806 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:55:42,806 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-11-06 22:55:42,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931063391] [2019-11-06 22:55:42,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:55:42,807 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:42,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:55:42,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:42,808 INFO L87 Difference]: Start difference. First operand 6239 states and 8457 transitions. Second operand 4 states. [2019-11-06 22:55:45,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:45,778 INFO L93 Difference]: Finished difference Result 18582 states and 25420 transitions. [2019-11-06 22:55:45,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:55:45,779 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-11-06 22:55:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:45,835 INFO L225 Difference]: With dead ends: 18582 [2019-11-06 22:55:45,836 INFO L226 Difference]: Without dead ends: 12349 [2019-11-06 22:55:45,852 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 275 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:45,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12349 states. [2019-11-06 22:55:46,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12349 to 11001. [2019-11-06 22:55:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11001 states. [2019-11-06 22:55:46,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11001 states to 11001 states and 14348 transitions. [2019-11-06 22:55:46,144 INFO L78 Accepts]: Start accepts. Automaton has 11001 states and 14348 transitions. Word has length 138 [2019-11-06 22:55:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:46,145 INFO L462 AbstractCegarLoop]: Abstraction has 11001 states and 14348 transitions. [2019-11-06 22:55:46,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:55:46,145 INFO L276 IsEmpty]: Start isEmpty. Operand 11001 states and 14348 transitions. [2019-11-06 22:55:46,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-11-06 22:55:46,153 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:46,153 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:55:46,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:46,407 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:46,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:46,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1641735738, now seen corresponding path program 1 times [2019-11-06 22:55:46,408 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:46,409 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150429013] [2019-11-06 22:55:46,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-06 22:55:46,668 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150429013] [2019-11-06 22:55:46,668 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065446414] [2019-11-06 22:55:46,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:55:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:46,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:55:46,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-06 22:55:46,861 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-06 22:55:46,949 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:55:46,949 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-11-06 22:55:46,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758256415] [2019-11-06 22:55:46,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:55:46,951 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:46,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:55:46,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:46,951 INFO L87 Difference]: Start difference. First operand 11001 states and 14348 transitions. Second operand 4 states. [2019-11-06 22:55:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:49,381 INFO L93 Difference]: Finished difference Result 25037 states and 32209 transitions. [2019-11-06 22:55:49,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:55:49,381 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 309 [2019-11-06 22:55:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:49,431 INFO L225 Difference]: With dead ends: 25037 [2019-11-06 22:55:49,431 INFO L226 Difference]: Without dead ends: 14042 [2019-11-06 22:55:49,454 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14042 states. [2019-11-06 22:55:49,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14042 to 10999. [2019-11-06 22:55:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10999 states. [2019-11-06 22:55:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10999 states to 10999 states and 14189 transitions. [2019-11-06 22:55:49,692 INFO L78 Accepts]: Start accepts. Automaton has 10999 states and 14189 transitions. Word has length 309 [2019-11-06 22:55:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:49,693 INFO L462 AbstractCegarLoop]: Abstraction has 10999 states and 14189 transitions. [2019-11-06 22:55:49,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:55:49,693 INFO L276 IsEmpty]: Start isEmpty. Operand 10999 states and 14189 transitions. [2019-11-06 22:55:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2019-11-06 22:55:49,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:49,726 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:49,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:49,930 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:49,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:49,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1051190182, now seen corresponding path program 1 times [2019-11-06 22:55:49,931 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:49,931 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145692578] [2019-11-06 22:55:49,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 266 proven. 256 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2019-11-06 22:55:51,296 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145692578] [2019-11-06 22:55:51,296 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549436226] [2019-11-06 22:55:51,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:51,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:55:51,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 722 proven. 2 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-06 22:55:51,742 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 398 proven. 144 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2019-11-06 22:55:52,260 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1010973116] [2019-11-06 22:55:52,268 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 652 [2019-11-06 22:55:52,332 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:55:52,332 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)