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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:43:06,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:43:06,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:43:06,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:43:06,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:43:06,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:43:06,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:43:06,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:43:06,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:43:06,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:43:06,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:43:06,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:43:06,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:43:06,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:43:06,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:43:06,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:43:06,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:43:06,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:43:06,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:43:06,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:43:06,725 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 01:43:06,739 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:43:06,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:43:06,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:43:06,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:43:06,741 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:43:06,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:43:06,742 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:43:06,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:43:06,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:43:06,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:43:06,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:43:06,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:43:06,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:43:06,743 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:43:06,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:43:06,744 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:43:06,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:43:06,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:43:06,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:43:06,745 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:43:06,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:43:06,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:43:06,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:43:06,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:43:06,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:43:06,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:43:06,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:43:06,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:43:06,747 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 01:43:07,086 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:43:07,105 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:43:07,108 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:43:07,110 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:43:07,110 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:43:07,111 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label54.c [2019-10-15 01:43:07,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75ce5a338/6c8b102aaae042b59a5053acace3de8f/FLAG4f797e46f [2019-10-15 01:43:07,764 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:43:07,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label54.c [2019-10-15 01:43:07,779 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75ce5a338/6c8b102aaae042b59a5053acace3de8f/FLAG4f797e46f [2019-10-15 01:43:08,023 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75ce5a338/6c8b102aaae042b59a5053acace3de8f [2019-10-15 01:43:08,036 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:43:08,038 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:43:08,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:08,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:43:08,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:43:08,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:08" (1/1) ... [2019-10-15 01:43:08,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6332a30e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:08, skipping insertion in model container [2019-10-15 01:43:08,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:08" (1/1) ... [2019-10-15 01:43:08,056 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:43:08,109 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:43:08,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:08,706 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:43:08,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:08,821 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:43:08,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:08 WrapperNode [2019-10-15 01:43:08,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:08,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:43:08,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:43:08,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:43:08,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:08" (1/1) ... [2019-10-15 01:43:08,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:08" (1/1) ... [2019-10-15 01:43:08,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:08" (1/1) ... [2019-10-15 01:43:08,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:08" (1/1) ... [2019-10-15 01:43:08,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:08" (1/1) ... [2019-10-15 01:43:08,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:08" (1/1) ... [2019-10-15 01:43:08,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:08" (1/1) ... [2019-10-15 01:43:08,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:43:08,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:43:08,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:43:08,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:43:08,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:08" (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 01:43:09,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:43:09,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:43:09,030 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:43:09,030 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:43:09,030 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:43:09,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:43:09,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:43:09,032 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:43:09,032 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:43:09,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:43:09,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:43:11,206 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:43:11,206 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:43:11,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:11 BoogieIcfgContainer [2019-10-15 01:43:11,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:43:11,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:43:11,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:43:11,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:43:11,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:43:08" (1/3) ... [2019-10-15 01:43:11,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eaec3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:11, skipping insertion in model container [2019-10-15 01:43:11,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:08" (2/3) ... [2019-10-15 01:43:11,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eaec3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:11, skipping insertion in model container [2019-10-15 01:43:11,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:11" (3/3) ... [2019-10-15 01:43:11,223 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label54.c [2019-10-15 01:43:11,233 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:43:11,242 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:43:11,254 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:43:11,293 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:43:11,294 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:43:11,294 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:43:11,294 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:43:11,294 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:43:11,294 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:43:11,295 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:43:11,295 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:43:11,327 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:43:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:43:11,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:11,340 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 01:43:11,342 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:11,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:11,349 INFO L82 PathProgramCache]: Analyzing trace with hash -219365321, now seen corresponding path program 1 times [2019-10-15 01:43:11,358 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:11,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995943779] [2019-10-15 01:43:11,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:11,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:11,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:11,866 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 01:43:11,867 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995943779] [2019-10-15 01:43:11,868 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:11,868 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:11,869 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585602386] [2019-10-15 01:43:11,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:11,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:11,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:11,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:11,894 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:43:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:12,473 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:43:12,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:12,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:43:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:12,489 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:43:12,489 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:43:12,493 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 01:43:12,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:43:12,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:43:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:43:12,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:43:12,560 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:43:12,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:12,561 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:43:12,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:12,561 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:43:12,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:43:12,566 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:12,566 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:43:12,567 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:12,567 INFO L82 PathProgramCache]: Analyzing trace with hash -701900100, now seen corresponding path program 1 times [2019-10-15 01:43:12,567 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:12,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490855731] [2019-10-15 01:43:12,568 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:12,568 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:12,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:12,753 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 01:43:12,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490855731] [2019-10-15 01:43:12,754 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:12,754 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:12,754 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115932898] [2019-10-15 01:43:12,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:12,757 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:12,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:12,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:12,758 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-15 01:43:13,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:13,233 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-10-15 01:43:13,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:13,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 01:43:13,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:13,240 INFO L225 Difference]: With dead ends: 513 [2019-10-15 01:43:13,240 INFO L226 Difference]: Without dead ends: 343 [2019-10-15 01:43:13,243 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 01:43:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-15 01:43:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-10-15 01:43:13,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-10-15 01:43:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 575 transitions. [2019-10-15 01:43:13,277 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 575 transitions. Word has length 94 [2019-10-15 01:43:13,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:13,278 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 575 transitions. [2019-10-15 01:43:13,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:13,279 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 575 transitions. [2019-10-15 01:43:13,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 01:43:13,283 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:13,284 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:43:13,284 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:13,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:13,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1307303777, now seen corresponding path program 1 times [2019-10-15 01:43:13,285 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:13,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267693413] [2019-10-15 01:43:13,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:13,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:13,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:13,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267693413] [2019-10-15 01:43:13,402 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:13,402 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:43:13,402 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848185154] [2019-10-15 01:43:13,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:43:13,403 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:13,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:43:13,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:43:13,404 INFO L87 Difference]: Start difference. First operand 343 states and 575 transitions. Second operand 6 states. [2019-10-15 01:43:14,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:14,073 INFO L93 Difference]: Finished difference Result 1059 states and 1887 transitions. [2019-10-15 01:43:14,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:43:14,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-15 01:43:14,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:14,085 INFO L225 Difference]: With dead ends: 1059 [2019-10-15 01:43:14,085 INFO L226 Difference]: Without dead ends: 721 [2019-10-15 01:43:14,090 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 01:43:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-15 01:43:14,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 703. [2019-10-15 01:43:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2019-10-15 01:43:14,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1170 transitions. [2019-10-15 01:43:14,235 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1170 transitions. Word has length 108 [2019-10-15 01:43:14,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:14,236 INFO L462 AbstractCegarLoop]: Abstraction has 703 states and 1170 transitions. [2019-10-15 01:43:14,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:43:14,236 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1170 transitions. [2019-10-15 01:43:14,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-15 01:43:14,243 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:14,245 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:43:14,246 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:14,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:14,246 INFO L82 PathProgramCache]: Analyzing trace with hash 2071202027, now seen corresponding path program 1 times [2019-10-15 01:43:14,247 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:14,247 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051599814] [2019-10-15 01:43:14,248 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:14,248 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:14,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:14,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051599814] [2019-10-15 01:43:14,465 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:14,465 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:43:14,466 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576166749] [2019-10-15 01:43:14,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:43:14,467 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:14,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:43:14,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:43:14,468 INFO L87 Difference]: Start difference. First operand 703 states and 1170 transitions. Second operand 6 states. [2019-10-15 01:43:15,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:15,389 INFO L93 Difference]: Finished difference Result 1783 states and 3030 transitions. [2019-10-15 01:43:15,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:43:15,392 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2019-10-15 01:43:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:15,403 INFO L225 Difference]: With dead ends: 1783 [2019-10-15 01:43:15,404 INFO L226 Difference]: Without dead ends: 1085 [2019-10-15 01:43:15,407 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 01:43:15,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2019-10-15 01:43:15,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1069. [2019-10-15 01:43:15,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1069 states. [2019-10-15 01:43:15,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1682 transitions. [2019-10-15 01:43:15,478 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1682 transitions. Word has length 114 [2019-10-15 01:43:15,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:15,479 INFO L462 AbstractCegarLoop]: Abstraction has 1069 states and 1682 transitions. [2019-10-15 01:43:15,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:43:15,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1682 transitions. [2019-10-15 01:43:15,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-15 01:43:15,485 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:15,485 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-15 01:43:15,485 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:15,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:15,486 INFO L82 PathProgramCache]: Analyzing trace with hash 5340402, now seen corresponding path program 1 times [2019-10-15 01:43:15,486 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:15,487 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135304475] [2019-10-15 01:43:15,487 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:15,487 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:15,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:15,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135304475] [2019-10-15 01:43:15,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714036616] [2019-10-15 01:43:15,722 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 01:43:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:15,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:43:15,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:43:15,926 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:43:15,988 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:43:15,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9] total 10 [2019-10-15 01:43:15,989 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895723801] [2019-10-15 01:43:15,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:15,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:15,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:15,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:43:15,991 INFO L87 Difference]: Start difference. First operand 1069 states and 1682 transitions. Second operand 3 states. [2019-10-15 01:43:16,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:16,456 INFO L93 Difference]: Finished difference Result 2733 states and 4373 transitions. [2019-10-15 01:43:16,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:16,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-15 01:43:16,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:16,464 INFO L225 Difference]: With dead ends: 2733 [2019-10-15 01:43:16,465 INFO L226 Difference]: Without dead ends: 977 [2019-10-15 01:43:16,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:43:16,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2019-10-15 01:43:16,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 975. [2019-10-15 01:43:16,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 975 states. [2019-10-15 01:43:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1450 transitions. [2019-10-15 01:43:16,524 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1450 transitions. Word has length 121 [2019-10-15 01:43:16,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:16,524 INFO L462 AbstractCegarLoop]: Abstraction has 975 states and 1450 transitions. [2019-10-15 01:43:16,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:16,525 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1450 transitions. [2019-10-15 01:43:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 01:43:16,530 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:16,530 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:16,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:16,734 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:16,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:16,735 INFO L82 PathProgramCache]: Analyzing trace with hash -89310220, now seen corresponding path program 1 times [2019-10-15 01:43:16,735 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:16,735 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281854633] [2019-10-15 01:43:16,736 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:16,736 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:16,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:16,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281854633] [2019-10-15 01:43:16,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495012846] [2019-10-15 01:43:16,860 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 01:43:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:16,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:43:16,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:17,000 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:17,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1835258666] [2019-10-15 01:43:17,144 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:43:17,145 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:17,152 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:17,162 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:17,163 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:17,524 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:43:19,655 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-10-15 01:43:28,572 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2019-10-15 01:43:28,621 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6168 conjuctions. This might take some time... [2019-10-15 01:43:29,017 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-10-15 01:43:29,080 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7496 conjuctions. This might take some time... [2019-10-15 01:43:29,600 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-10-15 01:43:29,674 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7496 conjuctions. This might take some time... [2019-10-15 01:43:30,204 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:43:30,218 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:43:30,485 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2019-10-15 01:43:30,713 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:43:30,997 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:43:31,292 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:43:31,550 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 76 [2019-10-15 01:43:31,825 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:43:32,071 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2019-10-15 01:43:32,356 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2019-10-15 01:43:32,931 WARN L191 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2019-10-15 01:43:33,518 WARN L191 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 77 [2019-10-15 01:43:33,779 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2019-10-15 01:43:37,604 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:43:37,605 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5, 12] total 25 [2019-10-15 01:43:37,605 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138248657] [2019-10-15 01:43:37,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:43:37,607 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:37,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:43:37,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:43:37,608 INFO L87 Difference]: Start difference. First operand 975 states and 1450 transitions. Second operand 25 states. [2019-10-15 01:43:37,893 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:43:38,250 WARN L191 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 93 [2019-10-15 01:43:38,637 WARN L191 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 99 [2019-10-15 01:43:39,056 WARN L191 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 96 [2019-10-15 01:43:39,396 WARN L191 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2019-10-15 01:43:39,741 WARN L191 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95 [2019-10-15 01:43:40,968 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2019-10-15 01:43:41,214 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2019-10-15 01:43:44,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:44,670 INFO L93 Difference]: Finished difference Result 2570 states and 3851 transitions. [2019-10-15 01:43:44,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-15 01:43:44,670 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 127 [2019-10-15 01:43:44,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:44,681 INFO L225 Difference]: With dead ends: 2570 [2019-10-15 01:43:44,681 INFO L226 Difference]: Without dead ends: 1600 [2019-10-15 01:43:44,685 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 278 SyntacticMatches, 98 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2143 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=475, Invalid=1505, Unknown=0, NotChecked=0, Total=1980 [2019-10-15 01:43:44,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states.