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_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:41:47,592 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:41:47,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:41:47,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:41:47,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:41:47,648 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 01:41:47,662 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:41:47,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:41:47,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:41:47,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:41:47,664 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:41:47,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:41:47,664 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:41:47,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:41:47,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:41:47,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:41:47,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:41:47,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:41:47,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:41:47,666 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:41:47,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:41:47,666 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:41:47,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:41:47,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:41:47,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:41:47,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:41:47,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:41:47,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:41:47,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:41:47,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:41:47,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:41:47,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:41:47,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:41:47,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:41:47,669 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 01:41:47,970 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:41:47,984 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:41:47,988 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:41:47,990 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:41:47,990 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:41:47,991 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label20.c [2019-10-15 01:41:48,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17ca05a7b/85a276bfa0184e3e9c93a9765c3c068c/FLAG418abb054 [2019-10-15 01:41:48,636 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:41:48,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label20.c [2019-10-15 01:41:48,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17ca05a7b/85a276bfa0184e3e9c93a9765c3c068c/FLAG418abb054 [2019-10-15 01:41:48,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17ca05a7b/85a276bfa0184e3e9c93a9765c3c068c [2019-10-15 01:41:48,913 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:41:48,915 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:41:48,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:48,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:41:48,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:41:48,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:48" (1/1) ... [2019-10-15 01:41:48,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fbd8e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:48, skipping insertion in model container [2019-10-15 01:41:48,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:48" (1/1) ... [2019-10-15 01:41:48,934 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:41:48,987 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:41:49,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:49,524 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:41:49,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:49,669 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:41:49,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:49 WrapperNode [2019-10-15 01:41:49,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:49,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:41:49,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:41:49,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:41:49,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:49" (1/1) ... [2019-10-15 01:41:49,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:49" (1/1) ... [2019-10-15 01:41:49,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:49" (1/1) ... [2019-10-15 01:41:49,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:49" (1/1) ... [2019-10-15 01:41:49,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:49" (1/1) ... [2019-10-15 01:41:49,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:49" (1/1) ... [2019-10-15 01:41:49,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:49" (1/1) ... [2019-10-15 01:41:49,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:41:49,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:41:49,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:41:49,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:41:49,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:49" (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 01:41:49,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:41:49,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:41:49,846 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:41:49,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:41:49,846 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:41:49,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:41:49,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:41:49,847 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:41:49,847 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:41:49,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:41:49,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:41:51,798 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:41:51,798 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:41:51,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:51 BoogieIcfgContainer [2019-10-15 01:41:51,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:41:51,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:41:51,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:41:51,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:41:51,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:41:48" (1/3) ... [2019-10-15 01:41:51,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5154348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:51, skipping insertion in model container [2019-10-15 01:41:51,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:49" (2/3) ... [2019-10-15 01:41:51,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5154348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:51, skipping insertion in model container [2019-10-15 01:41:51,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:51" (3/3) ... [2019-10-15 01:41:51,808 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label20.c [2019-10-15 01:41:51,818 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:41:51,827 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:41:51,839 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:41:51,864 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:41:51,865 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:41:51,865 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:41:51,865 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:41:51,865 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:41:51,866 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:41:51,866 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:41:51,866 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:41:51,887 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:41:51,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:41:51,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:51,899 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:51,900 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:51,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:51,907 INFO L82 PathProgramCache]: Analyzing trace with hash -219365833, now seen corresponding path program 1 times [2019-10-15 01:41:51,916 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:51,916 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517845465] [2019-10-15 01:41:51,917 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:51,917 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:51,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:52,400 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 01:41:52,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517845465] [2019-10-15 01:41:52,403 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:52,403 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:52,404 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299883536] [2019-10-15 01:41:52,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:52,412 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:52,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:52,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:52,436 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:41:53,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:53,095 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:41:53,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:53,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:41:53,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:53,113 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:41:53,113 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:41:53,117 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:53,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:41:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:41:53,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:41:53,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-10-15 01:41:53,184 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-10-15 01:41:53,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:53,185 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-10-15 01:41:53,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:53,185 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-10-15 01:41:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-15 01:41:53,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:53,191 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:53,191 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:53,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1874061170, now seen corresponding path program 1 times [2019-10-15 01:41:53,192 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:53,192 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869698950] [2019-10-15 01:41:53,193 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:53,193 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:53,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:53,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869698950] [2019-10-15 01:41:53,341 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:53,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:41:53,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250278692] [2019-10-15 01:41:53,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:41:53,344 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:53,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:41:53,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:41:53,345 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-10-15 01:41:54,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:54,017 INFO L93 Difference]: Finished difference Result 547 states and 1064 transitions. [2019-10-15 01:41:54,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:41:54,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-10-15 01:41:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:54,026 INFO L225 Difference]: With dead ends: 547 [2019-10-15 01:41:54,026 INFO L226 Difference]: Without dead ends: 377 [2019-10-15 01:41:54,029 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 01:41:54,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-10-15 01:41:54,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 355. [2019-10-15 01:41:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-10-15 01:41:54,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 642 transitions. [2019-10-15 01:41:54,112 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 642 transitions. Word has length 101 [2019-10-15 01:41:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:54,114 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 642 transitions. [2019-10-15 01:41:54,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:41:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 642 transitions. [2019-10-15 01:41:54,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-15 01:41:54,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:54,123 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:54,124 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:54,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:54,124 INFO L82 PathProgramCache]: Analyzing trace with hash 750781289, now seen corresponding path program 1 times [2019-10-15 01:41:54,125 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:54,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669332650] [2019-10-15 01:41:54,125 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:54,125 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:54,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:41:54,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669332650] [2019-10-15 01:41:54,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609738720] [2019-10-15 01:41:54,270 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 01:41:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:54,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:54,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:54,514 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:54,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [188226916] [2019-10-15 01:41:54,656 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:54,656 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:54,664 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:54,678 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:54,679 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:54,953 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:41:57,554 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-10-15 01:42:06,803 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2019-10-15 01:42:07,040 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 19800 conjuctions. This might take some time... [2019-10-15 01:42:08,872 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2019-10-15 01:42:09,077 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 21264 conjuctions. This might take some time... [2019-10-15 01:42:10,673 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2019-10-15 01:42:10,866 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 21264 conjuctions. This might take some time... [2019-10-15 01:42:12,611 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:12,626 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:12,873 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2019-10-15 01:42:13,139 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:13,438 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:13,731 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:42:14,223 WARN L191 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 82 [2019-10-15 01:42:14,511 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:42:14,771 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2019-10-15 01:42:15,039 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2019-10-15 01:42:15,586 WARN L191 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2019-10-15 01:42:16,264 WARN L191 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 87 [2019-10-15 01:42:16,535 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2019-10-15 01:42:19,595 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:42:19,595 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 12] total 22 [2019-10-15 01:42:19,595 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028023581] [2019-10-15 01:42:19,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:42:19,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:19,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:42:19,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:42:19,603 INFO L87 Difference]: Start difference. First operand 355 states and 642 transitions. Second operand 22 states. [2019-10-15 01:42:19,928 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:20,314 WARN L191 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2019-10-15 01:42:20,729 WARN L191 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2019-10-15 01:42:21,158 WARN L191 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 96 [2019-10-15 01:42:21,516 WARN L191 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:42:21,886 WARN L191 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:42:22,102 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2019-10-15 01:42:22,336 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2019-10-15 01:42:25,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:25,234 INFO L93 Difference]: Finished difference Result 882 states and 1610 transitions. [2019-10-15 01:42:25,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 01:42:25,235 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2019-10-15 01:42:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:25,245 INFO L225 Difference]: With dead ends: 882 [2019-10-15 01:42:25,245 INFO L226 Difference]: Without dead ends: 532 [2019-10-15 01:42:25,252 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 241 SyntacticMatches, 80 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 01:42:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2019-10-15 01:42:25,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 520. [2019-10-15 01:42:25,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2019-10-15 01:42:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 788 transitions. [2019-10-15 01:42:25,317 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 788 transitions. Word has length 109 [2019-10-15 01:42:25,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:25,317 INFO L462 AbstractCegarLoop]: Abstraction has 520 states and 788 transitions. [2019-10-15 01:42:25,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:42:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 788 transitions. [2019-10-15 01:42:25,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-15 01:42:25,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:25,329 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2019-10-15 01:42:25,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:25,542 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:25,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:25,543 INFO L82 PathProgramCache]: Analyzing trace with hash 429765994, now seen corresponding path program 1 times [2019-10-15 01:42:25,544 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:25,544 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23451156] [2019-10-15 01:42:25,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:25,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:25,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:25,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23451156] [2019-10-15 01:42:25,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424519190] [2019-10-15 01:42:25,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:25,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:25,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:25,861 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:25,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [731851920] [2019-10-15 01:42:25,921 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:25,921 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:25,922 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:25,922 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:25,922 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:26,024 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs