/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/Problem01_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:33:36,465 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:33:36,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:33:36,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:33:36,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:33:36,556 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 01:33:36,594 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:33:36,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:33:36,596 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:33:36,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:33:36,596 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:33:36,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:33:36,598 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:33:36,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:33:36,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:33:36,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:33:36,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:33:36,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:33:36,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:33:36,599 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:33:36,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:33:36,599 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:33:36,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:33:36,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:33:36,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:33:36,600 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:33:36,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:33:36,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:33:36,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:33:36,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:33:36,606 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:33:36,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:33:36,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:33:36,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:33:36,607 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 01:33:36,870 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:33:36,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:33:36,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:33:36,892 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:33:36,892 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:33:36,893 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label02.c [2019-11-07 01:33:36,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4277bb38c/8fb39123e6d442759da5f5727aefa286/FLAGbb26b55e0 [2019-11-07 01:33:37,539 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:33:37,539 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label02.c [2019-11-07 01:33:37,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4277bb38c/8fb39123e6d442759da5f5727aefa286/FLAGbb26b55e0 [2019-11-07 01:33:37,818 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4277bb38c/8fb39123e6d442759da5f5727aefa286 [2019-11-07 01:33:37,854 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:33:37,857 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:33:37,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:33:37,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:33:37,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:33:37,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:33:37" (1/1) ... [2019-11-07 01:33:37,881 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 01:33:37, skipping insertion in model container [2019-11-07 01:33:37,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:33:37" (1/1) ... [2019-11-07 01:33:37,897 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:33:37,961 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:33:38,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:33:38,575 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:33:38,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:33:38,713 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:33:38,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:38 WrapperNode [2019-11-07 01:33:38,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:33:38,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:33:38,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:33:38,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:33:38,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:38" (1/1) ... [2019-11-07 01:33:38,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:38" (1/1) ... [2019-11-07 01:33:38,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:38" (1/1) ... [2019-11-07 01:33:38,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:38" (1/1) ... [2019-11-07 01:33:38,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:38" (1/1) ... [2019-11-07 01:33:38,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:38" (1/1) ... [2019-11-07 01:33:38,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:38" (1/1) ... [2019-11-07 01:33:38,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:33:38,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:33:38,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:33:38,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:33:38,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:33:38,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:33:38,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:33:38,901 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:33:38,902 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:33:38,902 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:33:38,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:33:38,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:33:38,902 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:33:38,903 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:33:38,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:33:38,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:33:40,747 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:33:40,748 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:33:40,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:33:40 BoogieIcfgContainer [2019-11-07 01:33:40,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:33:40,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:33:40,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:33:40,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:33:40,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:33:37" (1/3) ... [2019-11-07 01:33:40,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd3bc09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:33:40, skipping insertion in model container [2019-11-07 01:33:40,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:38" (2/3) ... [2019-11-07 01:33:40,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd3bc09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:33:40, skipping insertion in model container [2019-11-07 01:33:40,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:33:40" (3/3) ... [2019-11-07 01:33:40,765 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label02.c [2019-11-07 01:33:40,775 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:33:40,785 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:33:40,796 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:33:40,822 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:33:40,822 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:33:40,823 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:33:40,823 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:33:40,823 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:33:40,823 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:33:40,823 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:33:40,823 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:33:40,842 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-11-07 01:33:40,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-07 01:33:40,850 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:33:40,851 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] [2019-11-07 01:33:40,853 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:33:40,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:33:40,857 INFO L82 PathProgramCache]: Analyzing trace with hash 826813922, now seen corresponding path program 1 times [2019-11-07 01:33:40,865 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:33:40,865 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837315917] [2019-11-07 01:33:40,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:33:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:41,242 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 01:33:41,242 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837315917] [2019-11-07 01:33:41,243 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:33:41,244 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:33:41,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202511368] [2019-11-07 01:33:41,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:33:41,252 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:33:41,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:33:41,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:33:41,269 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-11-07 01:33:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:33:41,817 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-11-07 01:33:41,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:33:41,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-11-07 01:33:41,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:33:41,840 INFO L225 Difference]: With dead ends: 246 [2019-11-07 01:33:41,841 INFO L226 Difference]: Without dead ends: 157 [2019-11-07 01:33:41,845 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 01:33:41,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-07 01:33:41,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-11-07 01:33:41,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-07 01:33:41,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 279 transitions. [2019-11-07 01:33:41,907 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 279 transitions. Word has length 77 [2019-11-07 01:33:41,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:33:41,908 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 279 transitions. [2019-11-07 01:33:41,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:33:41,908 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 279 transitions. [2019-11-07 01:33:41,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-07 01:33:41,913 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:33:41,913 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:33:41,914 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:33:41,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:33:41,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1195672711, now seen corresponding path program 1 times [2019-11-07 01:33:41,915 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:33:41,915 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845200691] [2019-11-07 01:33:41,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:33:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:42,047 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845200691] [2019-11-07 01:33:42,047 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:33:42,048 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:33:42,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833518251] [2019-11-07 01:33:42,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:33:42,050 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:33:42,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:33:42,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:33:42,051 INFO L87 Difference]: Start difference. First operand 157 states and 279 transitions. Second operand 6 states. [2019-11-07 01:33:42,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:33:42,648 INFO L93 Difference]: Finished difference Result 402 states and 725 transitions. [2019-11-07 01:33:42,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:33:42,650 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2019-11-07 01:33:42,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:33:42,655 INFO L225 Difference]: With dead ends: 402 [2019-11-07 01:33:42,655 INFO L226 Difference]: Without dead ends: 250 [2019-11-07 01:33:42,661 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 01:33:42,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-11-07 01:33:42,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2019-11-07 01:33:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-11-07 01:33:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 407 transitions. [2019-11-07 01:33:42,703 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 407 transitions. Word has length 87 [2019-11-07 01:33:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:33:42,704 INFO L462 AbstractCegarLoop]: Abstraction has 238 states and 407 transitions. [2019-11-07 01:33:42,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:33:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 407 transitions. [2019-11-07 01:33:42,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-07 01:33:42,707 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:33:42,707 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:33:42,707 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:33:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:33:42,708 INFO L82 PathProgramCache]: Analyzing trace with hash -2128694315, now seen corresponding path program 1 times [2019-11-07 01:33:42,708 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:33:42,708 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778078574] [2019-11-07 01:33:42,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:33:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:42,849 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778078574] [2019-11-07 01:33:42,849 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:33:42,849 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:33:42,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449606734] [2019-11-07 01:33:42,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:33:42,850 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:33:42,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:33:42,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:33:42,851 INFO L87 Difference]: Start difference. First operand 238 states and 407 transitions. Second operand 3 states. [2019-11-07 01:33:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:33:43,248 INFO L93 Difference]: Finished difference Result 700 states and 1240 transitions. [2019-11-07 01:33:43,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:33:43,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-11-07 01:33:43,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:33:43,254 INFO L225 Difference]: With dead ends: 700 [2019-11-07 01:33:43,255 INFO L226 Difference]: Without dead ends: 467 [2019-11-07 01:33:43,256 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 01:33:43,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2019-11-07 01:33:43,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2019-11-07 01:33:43,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2019-11-07 01:33:43,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 799 transitions. [2019-11-07 01:33:43,295 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 799 transitions. Word has length 88 [2019-11-07 01:33:43,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:33:43,296 INFO L462 AbstractCegarLoop]: Abstraction has 467 states and 799 transitions. [2019-11-07 01:33:43,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:33:43,296 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 799 transitions. [2019-11-07 01:33:43,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 01:33:43,301 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:33:43,302 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 01:33:43,302 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:33:43,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:33:43,302 INFO L82 PathProgramCache]: Analyzing trace with hash 579788873, now seen corresponding path program 1 times [2019-11-07 01:33:43,303 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:33:43,303 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659007715] [2019-11-07 01:33:43,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:33:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:43,436 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659007715] [2019-11-07 01:33:43,436 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:33:43,436 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:33:43,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726195815] [2019-11-07 01:33:43,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:33:43,437 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:33:43,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:33:43,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:33:43,438 INFO L87 Difference]: Start difference. First operand 467 states and 799 transitions. Second operand 3 states. [2019-11-07 01:33:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:33:43,887 INFO L93 Difference]: Finished difference Result 1310 states and 2339 transitions. [2019-11-07 01:33:43,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:33:43,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-11-07 01:33:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:33:43,894 INFO L225 Difference]: With dead ends: 1310 [2019-11-07 01:33:43,894 INFO L226 Difference]: Without dead ends: 848 [2019-11-07 01:33:43,897 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 01:33:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2019-11-07 01:33:43,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 848. [2019-11-07 01:33:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 848 states. [2019-11-07 01:33:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1398 transitions. [2019-11-07 01:33:43,956 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1398 transitions. Word has length 94 [2019-11-07 01:33:43,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:33:43,957 INFO L462 AbstractCegarLoop]: Abstraction has 848 states and 1398 transitions. [2019-11-07 01:33:43,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:33:43,957 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1398 transitions. [2019-11-07 01:33:43,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-07 01:33:43,962 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:33:43,962 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:43,962 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:33:43,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:33:43,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1929504678, now seen corresponding path program 1 times [2019-11-07 01:33:43,963 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:33:43,963 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103507073] [2019-11-07 01:33:43,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:33:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:44,098 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103507073] [2019-11-07 01:33:44,099 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10980914] [2019-11-07 01:33:44,099 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 01:33:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:44,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:33:44,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:33:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:33:44,326 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:33:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:33:44,400 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:33:44,401 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-07 01:33:44,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987590814] [2019-11-07 01:33:44,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:33:44,402 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:33:44,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:33:44,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:33:44,403 INFO L87 Difference]: Start difference. First operand 848 states and 1398 transitions. Second operand 3 states. [2019-11-07 01:33:44,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:33:44,891 INFO L93 Difference]: Finished difference Result 2378 states and 4057 transitions. [2019-11-07 01:33:44,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:33:44,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2019-11-07 01:33:44,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:33:44,910 INFO L225 Difference]: With dead ends: 2378 [2019-11-07 01:33:44,910 INFO L226 Difference]: Without dead ends: 1535 [2019-11-07 01:33:44,915 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:33:44,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2019-11-07 01:33:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1535. [2019-11-07 01:33:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1535 states. [2019-11-07 01:33:45,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2507 transitions. [2019-11-07 01:33:45,010 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2507 transitions. Word has length 113 [2019-11-07 01:33:45,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:33:45,011 INFO L462 AbstractCegarLoop]: Abstraction has 1535 states and 2507 transitions. [2019-11-07 01:33:45,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:33:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2507 transitions. [2019-11-07 01:33:45,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-07 01:33:45,020 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:33:45,020 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:45,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:33:45,225 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:33:45,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:33:45,225 INFO L82 PathProgramCache]: Analyzing trace with hash 719784990, now seen corresponding path program 1 times [2019-11-07 01:33:45,226 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:33:45,226 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760902482] [2019-11-07 01:33:45,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:33:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:45,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760902482] [2019-11-07 01:33:45,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349594336] [2019-11-07 01:33:45,302 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 [2019-11-07 01:33:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:33:45,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:33:45,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:33:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:45,466 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:33:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:33:45,548 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1243269385] [2019-11-07 01:33:45,577 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-11-07 01:33:45,577 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:33:45,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:33:45,590 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:33:45,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:33:45,834 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 102 for LOIs [2019-11-07 01:33:47,186 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 142 for LOIs [2019-11-07 01:33:47,466 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-11-07 01:33:47,740 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 149 [2019-11-07 01:33:47,899 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-11-07 01:33:48,126 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-11-07 01:33:48,306 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-11-07 01:33:48,510 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-11-07 01:33:48,672 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-11-07 01:33:48,939 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:33:49,118 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:33:49,600 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 148 [2019-11-07 01:33:49,724 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:33:49,902 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:33:50,010 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:33:50,249 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 148 [2019-11-07 01:33:50,368 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:33:50,701 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 148 [2019-11-07 01:33:50,839 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:33:51,018 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 148 [2019-11-07 01:33:51,402 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 148 [2019-11-07 01:33:51,638 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 148 [2019-11-07 01:33:51,765 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:33:51,952 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 148 [2019-11-07 01:33:52,196 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:33:52,593 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:33:52,705 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:33:52,855 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 148 [2019-11-07 01:33:52,957 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:33:53,116 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 148 [2019-11-07 01:33:53,532 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 147 [2019-11-07 01:33:54,174 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 147 [2019-11-07 01:33:54,416 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 147 [2019-11-07 01:33:55,034 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 147 [2019-11-07 01:33:55,229 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-11-07 01:33:55,687 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 147 [2019-11-07 01:33:55,838 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-11-07 01:33:56,297 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 147 [2019-11-07 01:33:57,224 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-11-07 01:33:57,479 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-11-07 01:33:57,687 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2019-11-07 01:33:57,834 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2019-11-07 01:33:58,009 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 146 [2019-11-07 01:34:00,501 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2019-11-07 01:34:01,379 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2019-11-07 01:34:01,501 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2019-11-07 01:34:01,669 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2019-11-07 01:34:03,183 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2019-11-07 01:34:06,261 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 270348 conjuctions. This might take some time...