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/Problem12_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:51:21,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:51:21,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:51:21,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:51:21,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:51:21,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:51:21,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:51:21,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:51:21,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:51:21,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:51:21,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:51:21,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:51:21,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:51:21,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:51:21,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:51:21,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:51:21,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:51:21,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:51:21,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:51:21,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:51:21,393 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 01:51:21,410 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:51:21,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:51:21,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:51:21,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:51:21,412 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:51:21,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:51:21,413 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:51:21,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:51:21,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:51:21,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:51:21,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:51:21,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:51:21,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:51:21,414 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:51:21,414 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:51:21,414 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:51:21,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:51:21,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:51:21,415 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:51:21,415 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:51:21,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:51:21,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:51:21,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:51:21,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:51:21,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:51:21,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:51:21,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:51:21,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:51:21,417 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 01:51:21,703 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:51:21,723 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:51:21,727 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:51:21,728 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:51:21,729 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:51:21,729 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label46.c [2019-10-15 01:51:21,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac40f2c7e/ecb36840e4b049fe992cab7867b9d583/FLAG827883513 [2019-10-15 01:51:22,608 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:51:22,608 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label46.c [2019-10-15 01:51:22,644 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac40f2c7e/ecb36840e4b049fe992cab7867b9d583/FLAG827883513 [2019-10-15 01:51:23,126 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac40f2c7e/ecb36840e4b049fe992cab7867b9d583 [2019-10-15 01:51:23,136 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:51:23,138 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:51:23,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:51:23,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:51:23,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:51:23,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:51:23" (1/1) ... [2019-10-15 01:51:23,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ef64dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:23, skipping insertion in model container [2019-10-15 01:51:23,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:51:23" (1/1) ... [2019-10-15 01:51:23,156 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:51:23,304 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:51:24,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:51:24,956 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:51:25,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:51:25,626 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:51:25,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:25 WrapperNode [2019-10-15 01:51:25,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:51:25,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:51:25,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:51:25,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:51:25,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:25" (1/1) ... [2019-10-15 01:51:25,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:25" (1/1) ... [2019-10-15 01:51:25,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:25" (1/1) ... [2019-10-15 01:51:25,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:25" (1/1) ... [2019-10-15 01:51:25,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:25" (1/1) ... [2019-10-15 01:51:25,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:25" (1/1) ... [2019-10-15 01:51:25,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:25" (1/1) ... [2019-10-15 01:51:25,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:51:25,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:51:25,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:51:25,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:51:25,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:25" (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 01:51:26,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:51:26,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:51:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:51:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:51:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 01:51:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-15 01:51:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:51:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:51:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:51:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 01:51:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-15 01:51:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:51:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:51:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:51:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:51:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:51:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:51:33,410 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:51:33,410 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:51:33,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:51:33 BoogieIcfgContainer [2019-10-15 01:51:33,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:51:33,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:51:33,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:51:33,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:51:33,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:51:23" (1/3) ... [2019-10-15 01:51:33,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ef7e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:51:33, skipping insertion in model container [2019-10-15 01:51:33,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:25" (2/3) ... [2019-10-15 01:51:33,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ef7e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:51:33, skipping insertion in model container [2019-10-15 01:51:33,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:51:33" (3/3) ... [2019-10-15 01:51:33,432 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label46.c [2019-10-15 01:51:33,442 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:51:33,452 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:51:33,464 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:51:33,509 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:51:33,509 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:51:33,510 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:51:33,510 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:51:33,510 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:51:33,510 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:51:33,510 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:51:33,510 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:51:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states. [2019-10-15 01:51:33,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:51:33,561 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:33,562 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:33,564 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:33,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:33,571 INFO L82 PathProgramCache]: Analyzing trace with hash -874904498, now seen corresponding path program 1 times [2019-10-15 01:51:33,580 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:33,581 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12164746] [2019-10-15 01:51:33,582 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:33,582 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:33,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:33,954 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 01:51:33,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12164746] [2019-10-15 01:51:33,959 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:33,960 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:51:33,960 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953679400] [2019-10-15 01:51:33,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:51:33,969 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:33,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:51:33,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:51:33,986 INFO L87 Difference]: Start difference. First operand 694 states. Second operand 4 states. [2019-10-15 01:51:41,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:41,854 INFO L93 Difference]: Finished difference Result 2753 states and 5428 transitions. [2019-10-15 01:51:41,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:51:41,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:51:41,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:41,894 INFO L225 Difference]: With dead ends: 2753 [2019-10-15 01:51:41,894 INFO L226 Difference]: Without dead ends: 2052 [2019-10-15 01:51:41,904 INFO L600 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 [2019-10-15 01:51:41,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2019-10-15 01:51:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2039. [2019-10-15 01:51:42,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2039 states. [2019-10-15 01:51:42,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 3482 transitions. [2019-10-15 01:51:42,061 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 3482 transitions. Word has length 11 [2019-10-15 01:51:42,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:42,062 INFO L462 AbstractCegarLoop]: Abstraction has 2039 states and 3482 transitions. [2019-10-15 01:51:42,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:51:42,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 3482 transitions. [2019-10-15 01:51:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 01:51:42,067 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:42,068 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:42,068 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:42,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:42,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2142185020, now seen corresponding path program 1 times [2019-10-15 01:51:42,069 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:42,070 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871215828] [2019-10-15 01:51:42,070 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:42,070 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:42,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:42,238 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:51:42,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871215828] [2019-10-15 01:51:42,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376330109] [2019-10-15 01:51:42,239 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 01:51:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:42,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:51:42,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:51:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:51:42,418 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:51:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:51:42,490 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:51:42,490 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-10-15 01:51:42,491 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940942082] [2019-10-15 01:51:42,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:51:42,493 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:42,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:51:42,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:51:42,494 INFO L87 Difference]: Start difference. First operand 2039 states and 3482 transitions. Second operand 5 states. [2019-10-15 01:51:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:49,870 INFO L93 Difference]: Finished difference Result 6165 states and 10639 transitions. [2019-10-15 01:51:49,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:51:49,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2019-10-15 01:51:49,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:49,900 INFO L225 Difference]: With dead ends: 6165 [2019-10-15 01:51:49,900 INFO L226 Difference]: Without dead ends: 4131 [2019-10-15 01:51:49,908 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:51:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2019-10-15 01:51:50,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 4090. [2019-10-15 01:51:50,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4090 states. [2019-10-15 01:51:50,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4090 states to 4090 states and 6343 transitions. [2019-10-15 01:51:50,064 INFO L78 Accepts]: Start accepts. Automaton has 4090 states and 6343 transitions. Word has length 43 [2019-10-15 01:51:50,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:50,065 INFO L462 AbstractCegarLoop]: Abstraction has 4090 states and 6343 transitions. [2019-10-15 01:51:50,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:51:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 4090 states and 6343 transitions. [2019-10-15 01:51:50,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-15 01:51:50,075 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:50,076 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-15 01:51:50,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:51:50,292 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:50,293 INFO L82 PathProgramCache]: Analyzing trace with hash -384118031, now seen corresponding path program 1 times [2019-10-15 01:51:50,294 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:50,294 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443165067] [2019-10-15 01:51:50,295 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:50,295 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:50,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:51:50,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443165067] [2019-10-15 01:51:50,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811210736] [2019-10-15 01:51:50,570 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 01:51:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:50,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:51:50,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:51:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:51:50,810 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:51:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:51:50,892 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:51:50,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:51:50,893 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458960066] [2019-10-15 01:51:50,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:51:50,894 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:50,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:51:50,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:51:50,895 INFO L87 Difference]: Start difference. First operand 4090 states and 6343 transitions. Second operand 5 states.