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_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:56:40,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:56:40,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:56:40,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:56:40,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:56:40,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:56:40,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:56:40,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:56:40,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:56:40,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:56:40,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:56:40,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:56:40,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:56:40,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:56:40,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:56:40,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:56:40,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:56:40,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:56:40,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:56:40,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:56:40,147 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 01:56:40,171 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:56:40,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:56:40,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:56:40,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:56:40,175 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:56:40,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:56:40,175 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:56:40,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:56:40,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:56:40,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:56:40,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:56:40,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:56:40,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:56:40,178 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:56:40,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:56:40,178 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:56:40,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:56:40,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:56:40,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:56:40,179 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:56:40,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:56:40,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:56:40,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:56:40,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:56:40,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:56:40,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:56:40,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:56:40,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:56:40,181 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 01:56:40,504 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:56:40,527 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:56:40,531 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:56:40,532 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:56:40,533 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:56:40,534 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label56.c [2019-10-15 01:56:40,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4a03d28/2d53ec5073f24d6eb0af3682cc334d64/FLAG0104282c9 [2019-10-15 01:56:41,283 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:56:41,284 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label56.c [2019-10-15 01:56:41,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4a03d28/2d53ec5073f24d6eb0af3682cc334d64/FLAG0104282c9 [2019-10-15 01:56:41,413 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4a03d28/2d53ec5073f24d6eb0af3682cc334d64 [2019-10-15 01:56:41,422 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:56:41,424 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:56:41,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:41,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:56:41,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:56:41,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:41" (1/1) ... [2019-10-15 01:56:41,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d3457a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:41, skipping insertion in model container [2019-10-15 01:56:41,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:41" (1/1) ... [2019-10-15 01:56:41,441 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:56:41,522 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:56:42,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:42,405 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:56:42,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:42,706 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:56:42,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42 WrapperNode [2019-10-15 01:56:42,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:42,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:56:42,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:56:42,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:56:42,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (1/1) ... [2019-10-15 01:56:42,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (1/1) ... [2019-10-15 01:56:42,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (1/1) ... [2019-10-15 01:56:42,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (1/1) ... [2019-10-15 01:56:42,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (1/1) ... [2019-10-15 01:56:42,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (1/1) ... [2019-10-15 01:56:42,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (1/1) ... [2019-10-15 01:56:42,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:56:42,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:56:42,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:56:42,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:56:42,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (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 01:56:42,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:56:42,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:56:42,969 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:56:42,969 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:56:42,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:56:42,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:56:42,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:56:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:56:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:56:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:56:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:56:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:56:42,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:56:59,818 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:56:59,819 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:56:59,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:56:59 BoogieIcfgContainer [2019-10-15 01:56:59,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:56:59,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:56:59,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:56:59,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:56:59,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:56:41" (1/3) ... [2019-10-15 01:56:59,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ceb1e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:56:59, skipping insertion in model container [2019-10-15 01:56:59,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (2/3) ... [2019-10-15 01:56:59,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ceb1e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:56:59, skipping insertion in model container [2019-10-15 01:56:59,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:56:59" (3/3) ... [2019-10-15 01:56:59,831 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label56.c [2019-10-15 01:56:59,840 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:56:59,847 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:56:59,857 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:56:59,887 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:56:59,888 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:56:59,888 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:56:59,888 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:56:59,888 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:56:59,888 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:56:59,889 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:56:59,889 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:56:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:56:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:56:59,921 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:59,922 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:56:59,924 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:59,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:59,931 INFO L82 PathProgramCache]: Analyzing trace with hash 863561279, now seen corresponding path program 1 times [2019-10-15 01:56:59,939 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:59,939 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640867143] [2019-10-15 01:56:59,939 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:59,940 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:59,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:00,169 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 01:57:00,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640867143] [2019-10-15 01:57:00,171 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:00,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:57:00,172 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507837104] [2019-10-15 01:57:00,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:57:00,177 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:00,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:57:00,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:57:00,194 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-15 01:57:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:03,576 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-15 01:57:03,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:57:03,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:57:03,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:03,599 INFO L225 Difference]: With dead ends: 718 [2019-10-15 01:57:03,599 INFO L226 Difference]: Without dead ends: 471 [2019-10-15 01:57:03,608 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 01:57:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-15 01:57:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 462. [2019-10-15 01:57:03,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2019-10-15 01:57:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 877 transitions. [2019-10-15 01:57:03,770 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 877 transitions. Word has length 11 [2019-10-15 01:57:03,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:03,772 INFO L462 AbstractCegarLoop]: Abstraction has 462 states and 877 transitions. [2019-10-15 01:57:03,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:57:03,773 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 877 transitions. [2019-10-15 01:57:03,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:57:03,777 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:03,777 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] [2019-10-15 01:57:03,778 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:03,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1289323206, now seen corresponding path program 1 times [2019-10-15 01:57:03,780 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:03,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184095005] [2019-10-15 01:57:03,781 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:03,781 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:03,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:04,014 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 01:57:04,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184095005] [2019-10-15 01:57:04,015 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:04,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:57:04,015 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427821131] [2019-10-15 01:57:04,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:57:04,017 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:04,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:57:04,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:57:04,018 INFO L87 Difference]: Start difference. First operand 462 states and 877 transitions. Second operand 6 states. [2019-10-15 01:57:06,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:06,223 INFO L93 Difference]: Finished difference Result 1390 states and 2669 transitions. [2019-10-15 01:57:06,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:06,224 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-10-15 01:57:06,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:06,233 INFO L225 Difference]: With dead ends: 1390 [2019-10-15 01:57:06,233 INFO L226 Difference]: Without dead ends: 933 [2019-10-15 01:57:06,236 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 01:57:06,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2019-10-15 01:57:06,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 917. [2019-10-15 01:57:06,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 917 states. [2019-10-15 01:57:06,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1678 transitions. [2019-10-15 01:57:06,282 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1678 transitions. Word has length 44 [2019-10-15 01:57:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:06,283 INFO L462 AbstractCegarLoop]: Abstraction has 917 states and 1678 transitions. [2019-10-15 01:57:06,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:57:06,283 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1678 transitions. [2019-10-15 01:57:06,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-15 01:57:06,289 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:06,290 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 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 01:57:06,290 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:06,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:06,291 INFO L82 PathProgramCache]: Analyzing trace with hash 653451875, now seen corresponding path program 1 times [2019-10-15 01:57:06,291 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:06,292 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511059943] [2019-10-15 01:57:06,293 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:06,293 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:06,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:57:06,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511059943] [2019-10-15 01:57:06,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133211143] [2019-10-15 01:57:06,504 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 [2019-10-15 01:57:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:06,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:57:06,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:57:06,709 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:57:06,817 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:57:06,817 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:57:06,817 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633955232] [2019-10-15 01:57:06,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:06,818 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:06,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:06,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:57:06,825 INFO L87 Difference]: Start difference. First operand 917 states and 1678 transitions. Second operand 5 states. [2019-10-15 01:57:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:08,926 INFO L93 Difference]: Finished difference Result 2074 states and 3785 transitions. [2019-10-15 01:57:08,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:08,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2019-10-15 01:57:08,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:08,934 INFO L225 Difference]: With dead ends: 2074 [2019-10-15 01:57:08,935 INFO L226 Difference]: Without dead ends: 1162 [2019-10-15 01:57:08,938 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:57:08,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2019-10-15 01:57:08,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1152. [2019-10-15 01:57:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1152 states. [2019-10-15 01:57:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2027 transitions. [2019-10-15 01:57:08,986 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2027 transitions. Word has length 95 [2019-10-15 01:57:08,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:08,987 INFO L462 AbstractCegarLoop]: Abstraction has 1152 states and 2027 transitions. [2019-10-15 01:57:08,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:08,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2027 transitions. [2019-10-15 01:57:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-15 01:57:08,996 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:08,997 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 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 01:57:09,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:09,209 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:09,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1484088139, now seen corresponding path program 1 times [2019-10-15 01:57:09,210 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:09,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286321370] [2019-10-15 01:57:09,210 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:09,210 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:09,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:57:09,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286321370] [2019-10-15 01:57:09,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044093622] [2019-10-15 01:57:09,354 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 [2019-10-15 01:57:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:09,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:57:09,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:57:09,523 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:57:09,590 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:57:09,590 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-15 01:57:09,590 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478042618] [2019-10-15 01:57:09,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:09,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:09,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:09,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:57:09,592 INFO L87 Difference]: Start difference. First operand 1152 states and 2027 transitions. Second operand 5 states. [2019-10-15 01:57:12,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:12,268 INFO L93 Difference]: Finished difference Result 3270 states and 5830 transitions. [2019-10-15 01:57:12,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:57:12,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2019-10-15 01:57:12,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:12,282 INFO L225 Difference]: With dead ends: 3270 [2019-10-15 01:57:12,283 INFO L226 Difference]: Without dead ends: 2123 [2019-10-15 01:57:12,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:57:12,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2019-10-15 01:57:12,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2055. [2019-10-15 01:57:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2055 states. [2019-10-15 01:57:12,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 3465 transitions. [2019-10-15 01:57:12,361 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 3465 transitions. Word has length 111 [2019-10-15 01:57:12,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:12,362 INFO L462 AbstractCegarLoop]: Abstraction has 2055 states and 3465 transitions. [2019-10-15 01:57:12,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:12,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 3465 transitions. [2019-10-15 01:57:12,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-15 01:57:12,364 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:12,365 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 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 01:57:12,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:12,577 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:12,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:12,578 INFO L82 PathProgramCache]: Analyzing trace with hash 749958893, now seen corresponding path program 1 times [2019-10-15 01:57:12,578 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:12,578 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128268444] [2019-10-15 01:57:12,578 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:12,579 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:12,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:57:12,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128268444] [2019-10-15 01:57:12,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955794498] [2019-10-15 01:57:12,729 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 [2019-10-15 01:57:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:12,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:57:12,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:57:12,909 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:57:12,980 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:57:12,980 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:57:12,980 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187793651] [2019-10-15 01:57:12,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:12,981 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:12,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:12,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:57:12,982 INFO L87 Difference]: Start difference. First operand 2055 states and 3465 transitions. Second operand 5 states. [2019-10-15 01:57:15,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:15,272 INFO L93 Difference]: Finished difference Result 5971 states and 10346 transitions. [2019-10-15 01:57:15,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:57:15,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2019-10-15 01:57:15,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:15,294 INFO L225 Difference]: With dead ends: 5971 [2019-10-15 01:57:15,294 INFO L226 Difference]: Without dead ends: 3921 [2019-10-15 01:57:15,300 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 225 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:57:15,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3921 states. [2019-10-15 01:57:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3921 to 3878. [2019-10-15 01:57:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3878 states. [2019-10-15 01:57:15,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 5867 transitions. [2019-10-15 01:57:15,409 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 5867 transitions. Word has length 115 [2019-10-15 01:57:15,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:15,409 INFO L462 AbstractCegarLoop]: Abstraction has 3878 states and 5867 transitions. [2019-10-15 01:57:15,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:15,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 5867 transitions. [2019-10-15 01:57:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-15 01:57:15,414 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:15,414 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:57:15,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:15,619 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:15,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:15,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1306060907, now seen corresponding path program 1 times [2019-10-15 01:57:15,619 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:15,620 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119131766] [2019-10-15 01:57:15,620 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:15,621 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:15,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:16,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119131766] [2019-10-15 01:57:16,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694732135] [2019-10-15 01:57:16,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:16,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:57:16,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:16,370 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:16,531 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [231906526] [2019-10-15 01:57:16,574 INFO L162 IcfgInterpreter]: Started Sifa with 163 locations of interest [2019-10-15 01:57:16,575 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:57:16,584 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:57:16,598 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:57:16,599 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:57:16,810 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2019-10-15 01:57:17,103 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2019-10-15 01:57:17,274 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2019-10-15 01:57:17,407 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2019-10-15 01:57:17,531 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2019-10-15 01:57:19,093 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 77 for LOIs [2019-10-15 01:57:19,154 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 29