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_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:56:39,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:56:39,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:56:39,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:56:39,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:56:39,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:56:39,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:56:39,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:56:39,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:56:39,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:56:39,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:56:39,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:56:39,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:56:39,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:56:39,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:56:39,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:56:39,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:56:39,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:56:39,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:56:39,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:56:39,164 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 01:56:39,182 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:56:39,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:56:39,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:56:39,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:56:39,187 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:56:39,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:56:39,188 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:56:39,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:56:39,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:56:39,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:56:39,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:56:39,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:56:39,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:56:39,190 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:56:39,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:56:39,191 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:56:39,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:56:39,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:56:39,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:56:39,192 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:56:39,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:56:39,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:56:39,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:56:39,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:56:39,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:56:39,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:56:39,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:56:39,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:56:39,194 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 01:56:39,454 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:56:39,467 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:56:39,471 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:56:39,472 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:56:39,473 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:56:39,474 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label55.c [2019-10-15 01:56:39,552 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e8c669cc/b639751ba6a74555b6b8713f396f7021/FLAGab0054ebb [2019-10-15 01:56:40,220 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:56:40,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label55.c [2019-10-15 01:56:40,241 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e8c669cc/b639751ba6a74555b6b8713f396f7021/FLAGab0054ebb [2019-10-15 01:56:40,406 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e8c669cc/b639751ba6a74555b6b8713f396f7021 [2019-10-15 01:56:40,416 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:56:40,418 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:56:40,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:40,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:56:40,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:56:40,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:40" (1/1) ... [2019-10-15 01:56:40,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67690949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:40, skipping insertion in model container [2019-10-15 01:56:40,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:40" (1/1) ... [2019-10-15 01:56:40,433 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:56:40,514 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:56:41,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:41,300 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:56:41,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:41,542 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:56:41,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:41 WrapperNode [2019-10-15 01:56:41,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:41,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:56:41,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:56:41,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:56:41,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:41" (1/1) ... [2019-10-15 01:56:41,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:41" (1/1) ... [2019-10-15 01:56:41,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:41" (1/1) ... [2019-10-15 01:56:41,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:41" (1/1) ... [2019-10-15 01:56:41,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:41" (1/1) ... [2019-10-15 01:56:41,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:41" (1/1) ... [2019-10-15 01:56:41,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:41" (1/1) ... [2019-10-15 01:56:41,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:56:41,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:56:41,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:56:41,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:56:41,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:41" (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 01:56:41,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:56:41,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:56:41,789 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:56:41,789 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:56:41,789 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:56:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:56:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:56:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:56:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:56:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:56:41,791 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:56:41,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:56:41,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:57:00,968 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:57:00,969 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:57:01,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:57:01 BoogieIcfgContainer [2019-10-15 01:57:01,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:57:01,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:57:01,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:57:01,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:57:01,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:56:40" (1/3) ... [2019-10-15 01:57:01,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cd16fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:57:01, skipping insertion in model container [2019-10-15 01:57:01,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:41" (2/3) ... [2019-10-15 01:57:01,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cd16fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:57:01, skipping insertion in model container [2019-10-15 01:57:01,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:57:01" (3/3) ... [2019-10-15 01:57:01,067 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label55.c [2019-10-15 01:57:01,076 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:57:01,083 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:57:01,093 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:57:01,124 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:57:01,125 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:57:01,125 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:57:01,125 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:57:01,125 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:57:01,125 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:57:01,125 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:57:01,126 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:57:01,165 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:57:01,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:57:01,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:01,176 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:01,179 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:01,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:01,186 INFO L82 PathProgramCache]: Analyzing trace with hash 863567423, now seen corresponding path program 1 times [2019-10-15 01:57:01,194 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:01,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449761978] [2019-10-15 01:57:01,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:01,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:01,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:01,463 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 01:57:01,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449761978] [2019-10-15 01:57:01,466 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:01,466 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:57:01,466 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195867928] [2019-10-15 01:57:01,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:57:01,472 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:01,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:57:01,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:57:01,489 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-15 01:57:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:03,222 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-15 01:57:03,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:57:03,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:57:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:03,243 INFO L225 Difference]: With dead ends: 718 [2019-10-15 01:57:03,243 INFO L226 Difference]: Without dead ends: 471 [2019-10-15 01:57:03,250 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 01:57:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-15 01:57:03,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 462. [2019-10-15 01:57:03,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2019-10-15 01:57:03,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 877 transitions. [2019-10-15 01:57:03,334 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 877 transitions. Word has length 11 [2019-10-15 01:57:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:03,335 INFO L462 AbstractCegarLoop]: Abstraction has 462 states and 877 transitions. [2019-10-15 01:57:03,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:57:03,335 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 877 transitions. [2019-10-15 01:57:03,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:57:03,338 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:03,338 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 01:57:03,338 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:03,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:03,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1869179782, now seen corresponding path program 1 times [2019-10-15 01:57:03,339 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:03,340 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130981283] [2019-10-15 01:57:03,340 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:03,340 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:03,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:03,518 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 01:57:03,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130981283] [2019-10-15 01:57:03,518 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:03,519 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:57:03,519 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764925781] [2019-10-15 01:57:03,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:57:03,521 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:03,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:57:03,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:57:03,522 INFO L87 Difference]: Start difference. First operand 462 states and 877 transitions. Second operand 6 states. [2019-10-15 01:57:09,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:09,658 INFO L93 Difference]: Finished difference Result 1390 states and 2669 transitions. [2019-10-15 01:57:09,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:09,659 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-10-15 01:57:09,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:09,669 INFO L225 Difference]: With dead ends: 1390 [2019-10-15 01:57:09,669 INFO L226 Difference]: Without dead ends: 933 [2019-10-15 01:57:09,672 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 01:57:09,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2019-10-15 01:57:09,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 917. [2019-10-15 01:57:09,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 917 states. [2019-10-15 01:57:09,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1678 transitions. [2019-10-15 01:57:09,744 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1678 transitions. Word has length 44 [2019-10-15 01:57:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:09,746 INFO L462 AbstractCegarLoop]: Abstraction has 917 states and 1678 transitions. [2019-10-15 01:57:09,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:57:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1678 transitions. [2019-10-15 01:57:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-15 01:57:09,753 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:09,753 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 01:57:09,754 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:09,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:09,755 INFO L82 PathProgramCache]: Analyzing trace with hash -2106277277, now seen corresponding path program 1 times [2019-10-15 01:57:09,755 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:09,755 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340512235] [2019-10-15 01:57:09,756 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:09,756 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:09,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:10,072 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 01:57:10,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340512235] [2019-10-15 01:57:10,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348404933] [2019-10-15 01:57:10,074 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 01:57:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:10,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:57:10,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:10,367 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 01:57:10,368 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:10,461 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 01:57:10,461 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:57:10,462 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:57:10,462 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603832363] [2019-10-15 01:57:10,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:10,463 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:10,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:10,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:57:10,473 INFO L87 Difference]: Start difference. First operand 917 states and 1678 transitions. Second operand 5 states. [2019-10-15 01:57:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:12,630 INFO L93 Difference]: Finished difference Result 2074 states and 3785 transitions. [2019-10-15 01:57:12,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:12,631 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2019-10-15 01:57:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:12,638 INFO L225 Difference]: With dead ends: 2074 [2019-10-15 01:57:12,639 INFO L226 Difference]: Without dead ends: 1162 [2019-10-15 01:57:12,641 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 01:57:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2019-10-15 01:57:12,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1152. [2019-10-15 01:57:12,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1152 states. [2019-10-15 01:57:12,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2027 transitions. [2019-10-15 01:57:12,679 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2027 transitions. Word has length 95 [2019-10-15 01:57:12,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:12,680 INFO L462 AbstractCegarLoop]: Abstraction has 1152 states and 2027 transitions. [2019-10-15 01:57:12,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:12,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2027 transitions. [2019-10-15 01:57:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-15 01:57:12,683 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:12,683 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 01:57:12,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:12,887 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:12,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:12,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1235743733, now seen corresponding path program 1 times [2019-10-15 01:57:12,889 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:12,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950848253] [2019-10-15 01:57:12,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:12,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:12,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:13,036 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 01:57:13,037 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950848253] [2019-10-15 01:57:13,037 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040069209] [2019-10-15 01:57:13,037 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 01:57:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:13,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:57:13,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:13,174 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 01:57:13,174 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:13,243 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 01:57:13,243 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:57:13,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-15 01:57:13,244 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163659308] [2019-10-15 01:57:13,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:13,245 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:13,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:13,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:57:13,245 INFO L87 Difference]: Start difference. First operand 1152 states and 2027 transitions. Second operand 5 states. [2019-10-15 01:57:16,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:16,329 INFO L93 Difference]: Finished difference Result 3268 states and 5831 transitions. [2019-10-15 01:57:16,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:57:16,331 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2019-10-15 01:57:16,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:16,352 INFO L225 Difference]: With dead ends: 3268 [2019-10-15 01:57:16,352 INFO L226 Difference]: Without dead ends: 2121 [2019-10-15 01:57:16,357 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 01:57:16,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2019-10-15 01:57:16,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 2055. [2019-10-15 01:57:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2055 states. [2019-10-15 01:57:16,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 3467 transitions. [2019-10-15 01:57:16,437 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 3467 transitions. Word has length 111 [2019-10-15 01:57:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:16,438 INFO L462 AbstractCegarLoop]: Abstraction has 2055 states and 3467 transitions. [2019-10-15 01:57:16,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 3467 transitions. [2019-10-15 01:57:16,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-15 01:57:16,450 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:16,450 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 01:57:16,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:16,651 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:16,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:16,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1715261907, now seen corresponding path program 1 times [2019-10-15 01:57:16,651 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:16,652 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154916868] [2019-10-15 01:57:16,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:16,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:16,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:16,801 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 01:57:16,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154916868] [2019-10-15 01:57:16,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732720733] [2019-10-15 01:57:16,802 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 01:57:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:16,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:57:16,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:17,014 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 01:57:17,014 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:17,072 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 01:57:17,072 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:57:17,073 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:57:17,073 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697032350] [2019-10-15 01:57:17,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:17,074 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:17,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:17,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:57:17,074 INFO L87 Difference]: Start difference. First operand 2055 states and 3467 transitions. Second operand 5 states. [2019-10-15 01:57:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:19,318 INFO L93 Difference]: Finished difference Result 5973 states and 10353 transitions. [2019-10-15 01:57:19,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:57:19,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2019-10-15 01:57:19,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:19,351 INFO L225 Difference]: With dead ends: 5973 [2019-10-15 01:57:19,351 INFO L226 Difference]: Without dead ends: 3923 [2019-10-15 01:57:19,357 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 01:57:19,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3923 states. [2019-10-15 01:57:19,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3923 to 3878. [2019-10-15 01:57:19,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3878 states. [2019-10-15 01:57:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 5867 transitions. [2019-10-15 01:57:19,486 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 5867 transitions. Word has length 115 [2019-10-15 01:57:19,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:19,487 INFO L462 AbstractCegarLoop]: Abstraction has 3878 states and 5867 transitions. [2019-10-15 01:57:19,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:19,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 5867 transitions. [2019-10-15 01:57:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-15 01:57:19,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:19,493 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 01:57:19,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:19,697 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:19,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1463456021, now seen corresponding path program 1 times [2019-10-15 01:57:19,698 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:19,699 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200744342] [2019-10-15 01:57:19,699 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:19,699 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:19,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:20,068 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 01:57:20,069 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200744342] [2019-10-15 01:57:20,069 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953922638] [2019-10-15 01:57:20,069 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 01:57:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:20,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:57:20,186 INFO L279 TraceCheckSpWp]: Computing forward predicates...