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/Problem02_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:42:36,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:42:36,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:42:36,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:42:36,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:42:36,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:42:36,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:42:36,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:42:36,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:42:36,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:42:36,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:42:36,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:42:36,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:42:36,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:42:36,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:42:36,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:42:36,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:42:36,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:42:36,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:42:36,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:42:36,147 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 01:42:36,160 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:42:36,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:42:36,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:42:36,162 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:42:36,162 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:42:36,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:42:36,163 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:42:36,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:42:36,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:42:36,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:42:36,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:42:36,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:42:36,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:42:36,164 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:42:36,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:42:36,165 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:42:36,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:42:36,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:42:36,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:42:36,165 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:42:36,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:42:36,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:36,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:42:36,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:42:36,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:42:36,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:42:36,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:42:36,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:42:36,167 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 01:42:36,483 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:42:36,496 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:42:36,501 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:42:36,502 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:42:36,503 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:42:36,503 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label41.c [2019-10-15 01:42:36,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c72976c9/55659361601b44beafe62325f2e51f9d/FLAGbdcf22a88 [2019-10-15 01:42:37,217 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:42:37,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label41.c [2019-10-15 01:42:37,229 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c72976c9/55659361601b44beafe62325f2e51f9d/FLAGbdcf22a88 [2019-10-15 01:42:37,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c72976c9/55659361601b44beafe62325f2e51f9d [2019-10-15 01:42:37,448 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:42:37,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:42:37,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:37,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:42:37,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:42:37,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:37" (1/1) ... [2019-10-15 01:42:37,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39fb0a41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:37, skipping insertion in model container [2019-10-15 01:42:37,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:37" (1/1) ... [2019-10-15 01:42:37,467 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:42:37,512 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:42:38,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:38,050 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:42:38,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:38,162 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:42:38,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38 WrapperNode [2019-10-15 01:42:38,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:38,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:42:38,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:42:38,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:42:38,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:38,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:38,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:38,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:38,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:38,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:38,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:38,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:42:38,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:42:38,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:42:38,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:42:38,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (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 01:42:38,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:42:38,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:42:38,380 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:42:38,380 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:42:38,380 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:42:38,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:42:38,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:42:38,381 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:42:38,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:42:38,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:42:38,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:42:40,444 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:42:40,444 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:42:40,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:40 BoogieIcfgContainer [2019-10-15 01:42:40,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:42:40,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:42:40,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:42:40,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:42:40,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:42:37" (1/3) ... [2019-10-15 01:42:40,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bac8690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:40, skipping insertion in model container [2019-10-15 01:42:40,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (2/3) ... [2019-10-15 01:42:40,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bac8690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:40, skipping insertion in model container [2019-10-15 01:42:40,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:40" (3/3) ... [2019-10-15 01:42:40,455 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label41.c [2019-10-15 01:42:40,466 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:42:40,474 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:42:40,487 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:42:40,515 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:42:40,515 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:42:40,516 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:42:40,516 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:42:40,516 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:42:40,516 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:42:40,517 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:42:40,517 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:42:40,539 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:42:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:42:40,550 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:40,551 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:40,553 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:40,560 INFO L82 PathProgramCache]: Analyzing trace with hash -219368137, now seen corresponding path program 1 times [2019-10-15 01:42:40,570 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:40,571 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120333702] [2019-10-15 01:42:40,571 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:40,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:40,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:41,017 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 01:42:41,018 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120333702] [2019-10-15 01:42:41,019 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:41,020 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:41,020 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830946128] [2019-10-15 01:42:41,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:41,026 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:41,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:41,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:41,047 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:42:41,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:41,731 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:42:41,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:41,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:42:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:41,749 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:42:41,749 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:42:41,754 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 01:42:41,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:42:41,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:42:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:42:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 317 transitions. [2019-10-15 01:42:41,820 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 317 transitions. Word has length 86 [2019-10-15 01:42:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:41,821 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 317 transitions. [2019-10-15 01:42:41,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:41,821 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 317 transitions. [2019-10-15 01:42:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 01:42:41,827 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:41,827 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:42:41,828 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:41,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:41,828 INFO L82 PathProgramCache]: Analyzing trace with hash 656209002, now seen corresponding path program 1 times [2019-10-15 01:42:41,828 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:41,829 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306035065] [2019-10-15 01:42:41,829 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:41,829 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:41,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:41,992 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:41,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306035065] [2019-10-15 01:42:41,993 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:41,993 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:42:41,993 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615649576] [2019-10-15 01:42:41,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:42:41,996 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:41,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:42:41,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:42:41,997 INFO L87 Difference]: Start difference. First operand 175 states and 317 transitions. Second operand 6 states. [2019-10-15 01:42:42,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:42,767 INFO L93 Difference]: Finished difference Result 531 states and 984 transitions. [2019-10-15 01:42:42,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:42:42,768 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-10-15 01:42:42,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:42,773 INFO L225 Difference]: With dead ends: 531 [2019-10-15 01:42:42,773 INFO L226 Difference]: Without dead ends: 361 [2019-10-15 01:42:42,776 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:42:42,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2019-10-15 01:42:42,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 355. [2019-10-15 01:42:42,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-10-15 01:42:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 632 transitions. [2019-10-15 01:42:42,816 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 632 transitions. Word has length 104 [2019-10-15 01:42:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:42,817 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 632 transitions. [2019-10-15 01:42:42,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:42:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 632 transitions. [2019-10-15 01:42:42,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-15 01:42:42,820 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:42,821 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:42:42,821 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:42,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:42,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1784864925, now seen corresponding path program 1 times [2019-10-15 01:42:42,822 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:42,822 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413347358] [2019-10-15 01:42:42,822 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:42,823 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:42,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:42,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413347358] [2019-10-15 01:42:42,994 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:42,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:42,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373165530] [2019-10-15 01:42:42,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:42,997 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:42,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:43,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:43,001 INFO L87 Difference]: Start difference. First operand 355 states and 632 transitions. Second operand 3 states. [2019-10-15 01:42:43,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:43,475 INFO L93 Difference]: Finished difference Result 963 states and 1743 transitions. [2019-10-15 01:42:43,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:43,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2019-10-15 01:42:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:43,484 INFO L225 Difference]: With dead ends: 963 [2019-10-15 01:42:43,484 INFO L226 Difference]: Without dead ends: 613 [2019-10-15 01:42:43,488 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 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 01:42:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2019-10-15 01:42:43,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 613. [2019-10-15 01:42:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2019-10-15 01:42:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 981 transitions. [2019-10-15 01:42:43,536 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 981 transitions. Word has length 105 [2019-10-15 01:42:43,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:43,537 INFO L462 AbstractCegarLoop]: Abstraction has 613 states and 981 transitions. [2019-10-15 01:42:43,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:43,538 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 981 transitions. [2019-10-15 01:42:43,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-15 01:42:43,543 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:43,543 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2019-10-15 01:42:43,544 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:43,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:43,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1660922037, now seen corresponding path program 1 times [2019-10-15 01:42:43,544 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:43,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599099168] [2019-10-15 01:42:43,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:43,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:43,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:43,687 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599099168] [2019-10-15 01:42:43,687 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006391743] [2019-10-15 01:42:43,688 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 01:42:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:43,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:42:43,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:42:43,933 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:42:44,048 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:42:44,048 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2019-10-15 01:42:44,048 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618336841] [2019-10-15 01:42:44,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:42:44,050 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:44,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:42:44,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:42:44,050 INFO L87 Difference]: Start difference. First operand 613 states and 981 transitions. Second operand 7 states. [2019-10-15 01:42:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:44,643 INFO L93 Difference]: Finished difference Result 1599 states and 2650 transitions. [2019-10-15 01:42:44,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:42:44,646 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2019-10-15 01:42:44,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:44,655 INFO L225 Difference]: With dead ends: 1599 [2019-10-15 01:42:44,655 INFO L226 Difference]: Without dead ends: 991 [2019-10-15 01:42:44,659 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 218 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:42:44,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2019-10-15 01:42:44,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 891. [2019-10-15 01:42:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2019-10-15 01:42:44,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1461 transitions. [2019-10-15 01:42:44,738 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1461 transitions. Word has length 113 [2019-10-15 01:42:44,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:44,739 INFO L462 AbstractCegarLoop]: Abstraction has 891 states and 1461 transitions. [2019-10-15 01:42:44,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:42:44,739 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1461 transitions. [2019-10-15 01:42:44,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-15 01:42:44,748 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:44,748 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 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] [2019-10-15 01:42:44,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:44,957 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:44,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:44,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1191501040, now seen corresponding path program 1 times [2019-10-15 01:42:44,957 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:44,958 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469295325] [2019-10-15 01:42:44,958 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:44,958 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:44,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:42:45,093 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469295325] [2019-10-15 01:42:45,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083922067] [2019-10-15 01:42:45,095 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 01:42:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:45,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:45,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:42:45,264 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:42:45,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [26833205] [2019-10-15 01:42:45,388 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:45,389 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:45,405 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:45,414 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:45,416 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:45,667 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:47,227 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 85 for LOIs [2019-10-15 01:42:50,107 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-15 01:42:50,125 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-10-15 01:42:50,172 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-10-15 01:42:50,262 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:50,279 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:50,547 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2019-10-15 01:42:50,787 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:51,100 WARN L191 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:51,881 WARN L191 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 99 [2019-10-15 01:42:52,187 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:42:52,482 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2019-10-15 01:42:52,743 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2019-10-15 01:42:53,014 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 69 [2019-10-15 01:42:53,305 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2019-10-15 01:42:53,679 WARN L191 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 74 [2019-10-15 01:42:53,929 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2019-10-15 01:42:57,146 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:42:57,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 12] total 23 [2019-10-15 01:42:57,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402168437] [2019-10-15 01:42:57,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:42:57,149 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:57,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:42:57,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:42:57,150 INFO L87 Difference]: Start difference. First operand 891 states and 1461 transitions. Second operand 23 states. [2019-10-15 01:42:57,428 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:57,848 WARN L191 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 94 [2019-10-15 01:42:58,440 WARN L191 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 98 [2019-10-15 01:42:59,102 WARN L191 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 95 [2019-10-15 01:42:59,459 WARN L191 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:42:59,822 WARN L191 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:43:00,067 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2019-10-15 01:43:00,465 WARN L191 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 79 [2019-10-15 01:43:00,832 WARN L191 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 75 [2019-10-15 01:43:01,071 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2019-10-15 01:43:01,288 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2019-10-15 01:43:01,609 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 92 [2019-10-15 01:43:01,810 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2019-10-15 01:43:02,112 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2019-10-15 01:43:02,723 WARN L191 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 79 [2019-10-15 01:43:03,140 WARN L191 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 75 [2019-10-15 01:43:03,382 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2019-10-15 01:43:03,601 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2019-10-15 01:43:04,016 WARN L191 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2019-10-15 01:43:04,413 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2019-10-15 01:43:06,421 WARN L191 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 99 [2019-10-15 01:43:07,510 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2019-10-15 01:43:07,881 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2019-10-15 01:43:09,391 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2019-10-15 01:43:09,887 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2019-10-15 01:43:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:13,869 INFO L93 Difference]: Finished difference Result 4574 states and 7971 transitions. [2019-10-15 01:43:13,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-10-15 01:43:13,870 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2019-10-15 01:43:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:13,892 INFO L225 Difference]: With dead ends: 4574 [2019-10-15 01:43:13,893 INFO L226 Difference]: Without dead ends: 3340 [2019-10-15 01:43:13,900 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 315 SyntacticMatches, 82 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3604 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=1206, Invalid=6104, Unknown=0, NotChecked=0, Total=7310 [2019-10-15 01:43:13,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2019-10-15 01:43:13,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 2814. [2019-10-15 01:43:13,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2814 states. [2019-10-15 01:43:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 4050 transitions. [2019-10-15 01:43:14,005 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 4050 transitions. Word has length 121 [2019-10-15 01:43:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:14,005 INFO L462 AbstractCegarLoop]: Abstraction has 2814 states and 4050 transitions. [2019-10-15 01:43:14,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:43:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 4050 transitions. [2019-10-15 01:43:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 01:43:14,014 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:14,015 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:14,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:14,226 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:14,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:14,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1513772128, now seen corresponding path program 1 times [2019-10-15 01:43:14,227 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:14,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399883043] [2019-10-15 01:43:14,227 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:14,227 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:14,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 66 proven. 23 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:43:14,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399883043] [2019-10-15 01:43:14,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527402778] [2019-10-15 01:43:14,324 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 01:43:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:14,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:43:14,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:43:14,510 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 83 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:43:14,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [755156998] [2019-10-15 01:43:14,601 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:43:14,601 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:14,602 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:14,602 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:14,603 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:14,728 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs