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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:55:46,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:55:46,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:55:46,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:55:46,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:55:46,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:55:46,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:55:46,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:55:46,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:55:46,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:55:46,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:55:46,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:55:46,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:55:46,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:55:46,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:55:46,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:55:46,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:55:46,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:55:46,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:55:46,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:55:46,684 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 [2019-10-15 01:55:46,698 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:55:46,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:55:46,700 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:55:46,700 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:55:46,700 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:55:46,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:55:46,701 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:55:46,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:55:46,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:55:46,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:55:46,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:55:46,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:55:46,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:55:46,702 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:55:46,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:55:46,703 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:55:46,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:55:46,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:55:46,703 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:55:46,703 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:55:46,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:55:46,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:55:46,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:55:46,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:55:46,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:55:46,705 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:55:46,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:55:46,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:55:46,705 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:55:47,011 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:55:47,030 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:55:47,033 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:55:47,035 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:55:47,035 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:55:47,036 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label17.c [2019-10-15 01:55:47,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400bd0eea/2cc6635333374d609dedf39010b3a647/FLAG94b202d85 [2019-10-15 01:55:47,806 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:55:47,807 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label17.c [2019-10-15 01:55:47,827 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400bd0eea/2cc6635333374d609dedf39010b3a647/FLAG94b202d85 [2019-10-15 01:55:47,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400bd0eea/2cc6635333374d609dedf39010b3a647 [2019-10-15 01:55:47,965 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:55:47,967 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:55:47,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:55:47,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:55:47,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:55:47,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:55:47" (1/1) ... [2019-10-15 01:55:47,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19511e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:47, skipping insertion in model container [2019-10-15 01:55:47,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:55:47" (1/1) ... [2019-10-15 01:55:47,987 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:55:48,069 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:55:48,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:55:48,947 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:55:49,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:55:49,186 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:55:49,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:49 WrapperNode [2019-10-15 01:55:49,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:55:49,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:55:49,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:55:49,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:55:49,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:49" (1/1) ... [2019-10-15 01:55:49,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:49" (1/1) ... [2019-10-15 01:55:49,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:49" (1/1) ... [2019-10-15 01:55:49,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:49" (1/1) ... [2019-10-15 01:55:49,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:49" (1/1) ... [2019-10-15 01:55:49,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:49" (1/1) ... [2019-10-15 01:55:49,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:49" (1/1) ... [2019-10-15 01:55:49,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:55:49,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:55:49,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:55:49,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:55:49,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:49" (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 [2019-10-15 01:55:49,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:55:49,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:55:49,524 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:55:49,524 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:55:49,524 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:55:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:55:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:55:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:55:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:55:49,527 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:55:49,527 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:55:49,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:55:49,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:56:14,465 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:56:14,465 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:56:14,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:56:14 BoogieIcfgContainer [2019-10-15 01:56:14,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:56:14,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:56:14,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:56:14,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:56:14,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:55:47" (1/3) ... [2019-10-15 01:56:14,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7697ce63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:56:14, skipping insertion in model container [2019-10-15 01:56:14,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:49" (2/3) ... [2019-10-15 01:56:14,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7697ce63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:56:14, skipping insertion in model container [2019-10-15 01:56:14,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:56:14" (3/3) ... [2019-10-15 01:56:14,475 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label17.c [2019-10-15 01:56:14,486 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:56:14,496 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:56:14,508 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:56:14,538 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:56:14,539 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:56:14,539 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:56:14,539 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:56:14,540 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:56:14,540 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:56:14,540 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:56:14,540 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:56:14,567 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:56:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:56:14,573 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:14,574 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:56:14,576 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:14,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:14,582 INFO L82 PathProgramCache]: Analyzing trace with hash 863567679, now seen corresponding path program 1 times [2019-10-15 01:56:14,589 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:14,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667116440] [2019-10-15 01:56:14,589 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:14,590 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:14,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:56:14,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667116440] [2019-10-15 01:56:14,918 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:56:14,919 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:56:14,919 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717654918] [2019-10-15 01:56:14,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:56:14,924 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:14,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:56:14,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:56:14,943 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-15 01:56:16,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:56:16,717 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-15 01:56:16,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:56:16,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:56:16,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:56:16,740 INFO L225 Difference]: With dead ends: 718 [2019-10-15 01:56:16,740 INFO L226 Difference]: Without dead ends: 471 [2019-10-15 01:56:16,748 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:56:16,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-15 01:56:16,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 467. [2019-10-15 01:56:16,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2019-10-15 01:56:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 881 transitions. [2019-10-15 01:56:16,841 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 881 transitions. Word has length 11 [2019-10-15 01:56:16,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:56:16,841 INFO L462 AbstractCegarLoop]: Abstraction has 467 states and 881 transitions. [2019-10-15 01:56:16,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:56:16,842 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 881 transitions. [2019-10-15 01:56:16,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:56:16,843 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:16,844 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:56:16,844 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:16,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:16,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1377706598, now seen corresponding path program 1 times [2019-10-15 01:56:16,845 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:16,845 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475666268] [2019-10-15 01:56:16,845 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:16,845 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:16,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:56:16,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475666268] [2019-10-15 01:56:16,950 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:56:16,950 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:56:16,950 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380356235] [2019-10-15 01:56:16,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:56:16,952 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:16,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:56:16,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:56:16,953 INFO L87 Difference]: Start difference. First operand 467 states and 881 transitions. Second operand 6 states. [2019-10-15 01:56:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:56:19,125 INFO L93 Difference]: Finished difference Result 1405 states and 2686 transitions. [2019-10-15 01:56:19,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:56:19,126 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-10-15 01:56:19,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:56:19,136 INFO L225 Difference]: With dead ends: 1405 [2019-10-15 01:56:19,136 INFO L226 Difference]: Without dead ends: 943 [2019-10-15 01:56:19,139 INFO L600 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 [2019-10-15 01:56:19,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2019-10-15 01:56:19,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 921. [2019-10-15 01:56:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 921 states. [2019-10-15 01:56:19,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1650 transitions. [2019-10-15 01:56:19,204 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1650 transitions. Word has length 22 [2019-10-15 01:56:19,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:56:19,204 INFO L462 AbstractCegarLoop]: Abstraction has 921 states and 1650 transitions. [2019-10-15 01:56:19,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:56:19,204 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1650 transitions. [2019-10-15 01:56:19,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 01:56:19,205 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:19,206 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:56:19,206 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:19,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:19,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1426381906, now seen corresponding path program 1 times [2019-10-15 01:56:19,207 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:19,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739340511] [2019-10-15 01:56:19,207 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:19,207 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:19,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:56:19,315 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739340511] [2019-10-15 01:56:19,315 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:56:19,316 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:56:19,316 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27698434] [2019-10-15 01:56:19,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:56:19,317 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:19,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:56:19,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:56:19,319 INFO L87 Difference]: Start difference. First operand 921 states and 1650 transitions. Second operand 6 states. [2019-10-15 01:56:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:56:21,941 INFO L93 Difference]: Finished difference Result 2551 states and 4681 transitions. [2019-10-15 01:56:21,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:56:21,943 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-10-15 01:56:21,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:56:21,959 INFO L225 Difference]: With dead ends: 2551 [2019-10-15 01:56:21,969 INFO L226 Difference]: Without dead ends: 1635 [2019-10-15 01:56:21,976 INFO L600 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 [2019-10-15 01:56:21,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2019-10-15 01:56:22,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1561. [2019-10-15 01:56:22,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1561 states. [2019-10-15 01:56:22,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 2762 transitions. [2019-10-15 01:56:22,052 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 2762 transitions. Word has length 26 [2019-10-15 01:56:22,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:56:22,052 INFO L462 AbstractCegarLoop]: Abstraction has 1561 states and 2762 transitions. [2019-10-15 01:56:22,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:56:22,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 2762 transitions. [2019-10-15 01:56:22,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 01:56:22,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:22,059 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:56:22,059 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:22,060 INFO L82 PathProgramCache]: Analyzing trace with hash -2114418835, now seen corresponding path program 1 times [2019-10-15 01:56:22,060 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:22,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925303834] [2019-10-15 01:56:22,060 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:22,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:22,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:56:22,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925303834] [2019-10-15 01:56:22,237 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:56:22,237 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:56:22,237 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877977029] [2019-10-15 01:56:22,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:56:22,239 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:22,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:56:22,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:56:22,239 INFO L87 Difference]: Start difference. First operand 1561 states and 2762 transitions. Second operand 6 states. [2019-10-15 01:56:24,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:56:24,283 INFO L93 Difference]: Finished difference Result 3816 states and 6825 transitions. [2019-10-15 01:56:24,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:56:24,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2019-10-15 01:56:24,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:56:24,307 INFO L225 Difference]: With dead ends: 3816 [2019-10-15 01:56:24,307 INFO L226 Difference]: Without dead ends: 2260 [2019-10-15 01:56:24,313 INFO L600 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 [2019-10-15 01:56:24,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2019-10-15 01:56:24,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2240. [2019-10-15 01:56:24,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2240 states. [2019-10-15 01:56:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 3673 transitions. [2019-10-15 01:56:24,395 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 3673 transitions. Word has length 57 [2019-10-15 01:56:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:56:24,395 INFO L462 AbstractCegarLoop]: Abstraction has 2240 states and 3673 transitions. [2019-10-15 01:56:24,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:56:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 3673 transitions. [2019-10-15 01:56:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-15 01:56:24,407 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:24,407 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:56:24,407 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:24,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:24,408 INFO L82 PathProgramCache]: Analyzing trace with hash 237414357, now seen corresponding path program 1 times [2019-10-15 01:56:24,408 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:24,409 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310187358] [2019-10-15 01:56:24,409 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:24,409 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:24,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:56:24,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310187358] [2019-10-15 01:56:24,629 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:56:24,630 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:56:24,630 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580772210] [2019-10-15 01:56:24,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:56:24,631 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:24,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:56:24,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:56:24,632 INFO L87 Difference]: Start difference. First operand 2240 states and 3673 transitions. Second operand 6 states.