java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:51:17,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:51:17,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:51:17,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:51:17,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:51:17,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:51:17,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:51:17,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:51:17,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:51:17,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:51:17,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:51:17,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:51:17,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:51:17,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:51:17,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:51:17,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:51:17,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:51:17,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:51:17,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:51:17,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:51:17,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:51:17,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:51:17,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:51:17,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:51:17,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:51:17,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:51:17,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:51:17,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:51:17,891 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:51:17,919 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:51:17,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:51:17,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:51:17,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:51:17,921 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:51:17,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:51:17,922 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:51:17,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:51:17,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:51:17,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:51:17,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:51:17,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:51:17,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:51:17,926 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:51:17,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:51:17,927 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:51:17,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:51:17,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:51:17,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:51:17,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:51:17,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:51:17,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:51:17,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:51:17,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:51:17,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:51:17,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:51:17,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:51:17,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:51:17,929 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:51:18,206 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:51:18,218 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:51:18,221 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:51:18,223 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:51:18,223 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:51:18,224 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label30.c [2019-10-15 01:51:18,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b69f0456/8d28b19ba3324505a2130a152b2f939d/FLAGf264e2780 [2019-10-15 01:51:19,097 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:51:19,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label30.c [2019-10-15 01:51:19,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b69f0456/8d28b19ba3324505a2130a152b2f939d/FLAGf264e2780 [2019-10-15 01:51:19,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b69f0456/8d28b19ba3324505a2130a152b2f939d [2019-10-15 01:51:19,631 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:51:19,633 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:51:19,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:51:19,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:51:19,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:51:19,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:51:19" (1/1) ... [2019-10-15 01:51:19,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bfc0887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:19, skipping insertion in model container [2019-10-15 01:51:19,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:51:19" (1/1) ... [2019-10-15 01:51:19,659 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:51:19,815 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:51:21,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:51:21,167 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:51:22,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:51:22,113 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:51:22,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:22 WrapperNode [2019-10-15 01:51:22,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:51:22,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:51:22,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:51:22,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:51:22,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:22" (1/1) ... [2019-10-15 01:51:22,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:22" (1/1) ... [2019-10-15 01:51:22,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:22" (1/1) ... [2019-10-15 01:51:22,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:22" (1/1) ... [2019-10-15 01:51:22,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:22" (1/1) ... [2019-10-15 01:51:22,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:22" (1/1) ... [2019-10-15 01:51:22,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:22" (1/1) ... [2019-10-15 01:51:22,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:51:22,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:51:22,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:51:22,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:51:22,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:51:22,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:51:22,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:51:22,540 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:51:22,540 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:51:22,541 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 01:51:22,541 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-15 01:51:22,542 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:51:22,542 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:51:22,543 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:51:22,544 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 01:51:22,544 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-15 01:51:22,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:51:22,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:51:22,545 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:51:22,546 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:51:22,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:51:22,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:51:28,849 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:51:28,849 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:51:28,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:51:28 BoogieIcfgContainer [2019-10-15 01:51:28,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:51:28,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:51:28,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:51:28,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:51:28,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:51:19" (1/3) ... [2019-10-15 01:51:28,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@414254b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:51:28, skipping insertion in model container [2019-10-15 01:51:28,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:22" (2/3) ... [2019-10-15 01:51:28,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@414254b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:51:28, skipping insertion in model container [2019-10-15 01:51:28,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:51:28" (3/3) ... [2019-10-15 01:51:28,877 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label30.c [2019-10-15 01:51:28,888 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:51:28,899 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:51:28,912 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:51:28,955 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:51:28,955 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:51:28,956 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:51:28,956 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:51:28,956 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:51:28,956 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:51:28,956 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:51:28,957 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:51:28,999 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states. [2019-10-15 01:51:29,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:51:29,005 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:29,006 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:29,008 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:29,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:29,015 INFO L82 PathProgramCache]: Analyzing trace with hash -874913714, now seen corresponding path program 1 times [2019-10-15 01:51:29,024 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:29,025 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81675106] [2019-10-15 01:51:29,025 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:29,026 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:29,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:29,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81675106] [2019-10-15 01:51:29,259 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:29,259 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:51:29,260 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138646996] [2019-10-15 01:51:29,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:51:29,267 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:29,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:51:29,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:51:29,285 INFO L87 Difference]: Start difference. First operand 694 states. Second operand 4 states. [2019-10-15 01:51:37,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:37,334 INFO L93 Difference]: Finished difference Result 2753 states and 5428 transitions. [2019-10-15 01:51:37,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:51:37,336 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:51:37,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:37,377 INFO L225 Difference]: With dead ends: 2753 [2019-10-15 01:51:37,377 INFO L226 Difference]: Without dead ends: 2052 [2019-10-15 01:51:37,391 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:51:37,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2019-10-15 01:51:37,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2042. [2019-10-15 01:51:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2042 states. [2019-10-15 01:51:37,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 3332 transitions. [2019-10-15 01:51:37,571 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 3332 transitions. Word has length 11 [2019-10-15 01:51:37,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:37,572 INFO L462 AbstractCegarLoop]: Abstraction has 2042 states and 3332 transitions. [2019-10-15 01:51:37,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:51:37,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 3332 transitions. [2019-10-15 01:51:37,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:51:37,576 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:37,576 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] [2019-10-15 01:51:37,577 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:37,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:37,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1056520537, now seen corresponding path program 1 times [2019-10-15 01:51:37,579 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:37,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634814794] [2019-10-15 01:51:37,579 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:37,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:37,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:37,804 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 01:51:37,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634814794] [2019-10-15 01:51:37,805 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:37,806 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:51:37,806 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442839028] [2019-10-15 01:51:37,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:51:37,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:37,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:51:37,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:51:37,808 INFO L87 Difference]: Start difference. First operand 2042 states and 3332 transitions. Second operand 6 states. [2019-10-15 01:51:44,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:44,671 INFO L93 Difference]: Finished difference Result 6196 states and 10265 transitions. [2019-10-15 01:51:44,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:51:44,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-10-15 01:51:44,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:44,702 INFO L225 Difference]: With dead ends: 6196 [2019-10-15 01:51:44,703 INFO L226 Difference]: Without dead ends: 4159 [2019-10-15 01:51:44,711 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 01:51:44,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2019-10-15 01:51:44,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 4098. [2019-10-15 01:51:44,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4098 states. [2019-10-15 01:51:44,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 6361 transitions. [2019-10-15 01:51:44,854 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 6361 transitions. Word has length 32 [2019-10-15 01:51:44,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:44,855 INFO L462 AbstractCegarLoop]: Abstraction has 4098 states and 6361 transitions. [2019-10-15 01:51:44,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:51:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 6361 transitions. [2019-10-15 01:51:44,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-15 01:51:44,859 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:44,859 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] [2019-10-15 01:51:44,860 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:44,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:44,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1281430295, now seen corresponding path program 1 times [2019-10-15 01:51:44,861 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:44,862 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442913580] [2019-10-15 01:51:44,862 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:44,862 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:44,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:45,042 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 01:51:45,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442913580] [2019-10-15 01:51:45,043 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:45,043 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:51:45,043 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156336931] [2019-10-15 01:51:45,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:51:45,044 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:45,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:51:45,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:51:45,045 INFO L87 Difference]: Start difference. First operand 4098 states and 6361 transitions. Second operand 6 states. [2019-10-15 01:51:51,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:51,098 INFO L93 Difference]: Finished difference Result 12497 states and 20236 transitions. [2019-10-15 01:51:51,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:51:51,100 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2019-10-15 01:51:51,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:51,158 INFO L225 Difference]: With dead ends: 12497 [2019-10-15 01:51:51,158 INFO L226 Difference]: Without dead ends: 8404 [2019-10-15 01:51:51,172 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 01:51:51,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8404 states. [2019-10-15 01:51:51,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8404 to 8263. [2019-10-15 01:51:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8263 states. [2019-10-15 01:51:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8263 states to 8263 states and 12870 transitions. [2019-10-15 01:51:51,502 INFO L78 Accepts]: Start accepts. Automaton has 8263 states and 12870 transitions. Word has length 40 [2019-10-15 01:51:51,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:51,504 INFO L462 AbstractCegarLoop]: Abstraction has 8263 states and 12870 transitions. [2019-10-15 01:51:51,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:51:51,504 INFO L276 IsEmpty]: Start isEmpty. Operand 8263 states and 12870 transitions. [2019-10-15 01:51:51,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-15 01:51:51,518 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:51,518 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:51,519 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:51,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1662665925, now seen corresponding path program 1 times [2019-10-15 01:51:51,520 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:51,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951015510] [2019-10-15 01:51:51,520 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:51,520 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:51,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:51:51,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951015510] [2019-10-15 01:51:51,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507090533] [2019-10-15 01:51:51,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:51:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:51,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:51:51,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:51:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:51:51,953 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:51:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:51:52,052 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:51:52,052 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-10-15 01:51:52,052 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875745496] [2019-10-15 01:51:52,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:51:52,053 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:52,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:51:52,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:51:52,055 INFO L87 Difference]: Start difference. First operand 8263 states and 12870 transitions. Second operand 5 states.