/usr/bin/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_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:40:45,853 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:40:45,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:40:45,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:40:45,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:40:45,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:40:45,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:40:45,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:40:45,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:40:45,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:40:45,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:40:45,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:40:45,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:40:45,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:40:45,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:40:45,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:40:45,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:40:45,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:40:45,901 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 [2019-11-07 01:40:45,922 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:40:45,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:40:45,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:40:45,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:40:45,924 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:40:45,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:40:45,925 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:40:45,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:40:45,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:40:45,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:40:45,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:40:45,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:40:45,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:40:45,927 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:40:45,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:40:45,927 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:40:45,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:40:45,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:40:45,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:40:45,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:40:45,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:40:45,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:40:45,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:40:45,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:40:45,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:40:45,930 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:40:45,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:40:45,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:40:45,931 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 [2019-11-07 01:40:46,221 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:40:46,244 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:40:46,248 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:40:46,249 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:40:46,250 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:40:46,250 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label53.c [2019-11-07 01:40:46,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c14a0ecf/39ea869313e84576825a101100e90b37/FLAGaac26697d [2019-11-07 01:40:46,923 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:40:46,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label53.c [2019-11-07 01:40:46,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c14a0ecf/39ea869313e84576825a101100e90b37/FLAGaac26697d [2019-11-07 01:40:47,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c14a0ecf/39ea869313e84576825a101100e90b37 [2019-11-07 01:40:47,198 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:40:47,213 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:40:47,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:40:47,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:40:47,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:40:47,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:47" (1/1) ... [2019-11-07 01:40:47,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c70f143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:47, skipping insertion in model container [2019-11-07 01:40:47,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:47" (1/1) ... [2019-11-07 01:40:47,245 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:40:47,304 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:40:47,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:40:47,834 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:40:47,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:40:47,955 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:40:47,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:47 WrapperNode [2019-11-07 01:40:47,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:40:47,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:40:47,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:40:47,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:40:47,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:47" (1/1) ... [2019-11-07 01:40:47,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:47" (1/1) ... [2019-11-07 01:40:47,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:47" (1/1) ... [2019-11-07 01:40:47,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:47" (1/1) ... [2019-11-07 01:40:48,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:47" (1/1) ... [2019-11-07 01:40:48,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:47" (1/1) ... [2019-11-07 01:40:48,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:47" (1/1) ... [2019-11-07 01:40:48,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:40:48,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:40:48,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:40:48,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:40:48,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:47" (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 [2019-11-07 01:40:48,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:40:48,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:40:48,115 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:40:48,115 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:40:48,115 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:40:48,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:40:48,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:40:48,116 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:40:48,116 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:40:48,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:40:48,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:40:50,207 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:40:50,207 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:40:50,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:50 BoogieIcfgContainer [2019-11-07 01:40:50,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:40:50,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:40:50,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:40:50,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:40:50,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:40:47" (1/3) ... [2019-11-07 01:40:50,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c7321d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:50, skipping insertion in model container [2019-11-07 01:40:50,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:47" (2/3) ... [2019-11-07 01:40:50,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c7321d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:50, skipping insertion in model container [2019-11-07 01:40:50,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:50" (3/3) ... [2019-11-07 01:40:50,217 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label53.c [2019-11-07 01:40:50,227 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:40:50,235 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:40:50,246 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:40:50,272 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:40:50,273 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:40:50,273 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:40:50,273 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:40:50,273 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:40:50,274 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:40:50,274 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:40:50,274 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:40:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:40:50,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:40:50,304 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:50,306 INFO L410 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] [2019-11-07 01:40:50,308 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:50,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:50,314 INFO L82 PathProgramCache]: Analyzing trace with hash -219355849, now seen corresponding path program 1 times [2019-11-07 01:40:50,324 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:50,325 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134138038] [2019-11-07 01:40:50,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:50,739 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134138038] [2019-11-07 01:40:50,740 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:40:50,740 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:40:50,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461295475] [2019-11-07 01:40:50,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:40:50,748 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:50,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:40:50,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:40:50,766 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-11-07 01:40:51,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:51,364 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-11-07 01:40:51,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:40:51,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 01:40:51,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:51,382 INFO L225 Difference]: With dead ends: 273 [2019-11-07 01:40:51,382 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:40:51,386 INFO L630 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 [2019-11-07 01:40:51,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:40:51,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-07 01:40:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:40:51,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-11-07 01:40:51,475 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-11-07 01:40:51,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:51,477 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-11-07 01:40:51,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:40:51,477 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-11-07 01:40:51,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 01:40:51,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:51,483 INFO L410 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] [2019-11-07 01:40:51,483 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:51,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:51,484 INFO L82 PathProgramCache]: Analyzing trace with hash -701890628, now seen corresponding path program 1 times [2019-11-07 01:40:51,484 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:51,484 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005581182] [2019-11-07 01:40:51,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:51,624 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005581182] [2019-11-07 01:40:51,624 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:40:51,624 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:40:51,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924113869] [2019-11-07 01:40:51,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:40:51,627 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:51,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:40:51,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:40:51,627 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-11-07 01:40:52,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:52,065 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-11-07 01:40:52,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:40:52,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-11-07 01:40:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:52,078 INFO L225 Difference]: With dead ends: 513 [2019-11-07 01:40:52,078 INFO L226 Difference]: Without dead ends: 343 [2019-11-07 01:40:52,081 INFO L630 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 [2019-11-07 01:40:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-11-07 01:40:52,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-11-07 01:40:52,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-11-07 01:40:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 575 transitions. [2019-11-07 01:40:52,128 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 575 transitions. Word has length 94 [2019-11-07 01:40:52,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:52,129 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 575 transitions. [2019-11-07 01:40:52,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:40:52,129 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 575 transitions. [2019-11-07 01:40:52,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-07 01:40:52,145 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:52,145 INFO L410 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] [2019-11-07 01:40:52,145 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:52,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1307294305, now seen corresponding path program 1 times [2019-11-07 01:40:52,146 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:52,146 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991988149] [2019-11-07 01:40:52,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:52,287 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991988149] [2019-11-07 01:40:52,288 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:40:52,289 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:40:52,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083757028] [2019-11-07 01:40:52,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:40:52,294 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:52,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:40:52,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:40:52,296 INFO L87 Difference]: Start difference. First operand 343 states and 575 transitions. Second operand 6 states. [2019-11-07 01:40:52,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:52,994 INFO L93 Difference]: Finished difference Result 1059 states and 1887 transitions. [2019-11-07 01:40:52,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:40:52,995 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-11-07 01:40:52,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:53,002 INFO L225 Difference]: With dead ends: 1059 [2019-11-07 01:40:53,003 INFO L226 Difference]: Without dead ends: 721 [2019-11-07 01:40:53,005 INFO L630 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 [2019-11-07 01:40:53,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-11-07 01:40:53,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 703. [2019-11-07 01:40:53,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2019-11-07 01:40:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1169 transitions. [2019-11-07 01:40:53,058 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1169 transitions. Word has length 108 [2019-11-07 01:40:53,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:53,058 INFO L462 AbstractCegarLoop]: Abstraction has 703 states and 1169 transitions. [2019-11-07 01:40:53,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:40:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1169 transitions. [2019-11-07 01:40:53,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-07 01:40:53,063 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:53,063 INFO L410 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] [2019-11-07 01:40:53,064 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:53,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:53,064 INFO L82 PathProgramCache]: Analyzing trace with hash -89300748, now seen corresponding path program 1 times [2019-11-07 01:40:53,064 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:53,064 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558104680] [2019-11-07 01:40:53,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:53,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558104680] [2019-11-07 01:40:53,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018674828] [2019-11-07 01:40:53,206 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 [2019-11-07 01:40:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:53,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:40:53,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:40:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:53,495 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:40:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:53,599 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1650091534] [2019-11-07 01:40:53,656 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:40:53,657 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:40:53,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:40:53,678 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:40:53,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:40:53,898 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-11-07 01:40:55,257 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-11-07 01:40:55,986 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 95 [2019-11-07 01:41:02,780 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2019-11-07 01:41:04,957 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 43160 conjuctions. This might take some time... [2019-11-07 01:41:06,425 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2019-11-07 01:41:07,816 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 43160 conjuctions. This might take some time... [2019-11-07 01:41:09,878 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2019-11-07 01:41:11,203 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 43160 conjuctions. This might take some time... [2019-11-07 01:41:17,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:41:17,755 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:41:18,192 WARN L191 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 81 [2019-11-07 01:41:18,549 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2019-11-07 01:41:19,423 WARN L191 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 99 [2019-11-07 01:41:20,400 WARN L191 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 103 [2019-11-07 01:41:20,702 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-11-07 01:41:20,935 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-11-07 01:41:21,176 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-11-07 01:41:21,472 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2019-11-07 01:41:21,838 WARN L191 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 80 [2019-11-07 01:41:22,162 WARN L191 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2019-11-07 01:41:22,531 WARN L191 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79