/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_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:38:12,574 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:38:12,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:38:12,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:38:12,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:38:12,654 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 01:38:12,688 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:38:12,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:38:12,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:38:12,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:38:12,690 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:38:12,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:38:12,691 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:38:12,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:38:12,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:38:12,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:38:12,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:38:12,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:38:12,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:38:12,695 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:38:12,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:38:12,695 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:38:12,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:38:12,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:38:12,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:38:12,696 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:38:12,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:38:12,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:38:12,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:38:12,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:38:12,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:38:12,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:38:12,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:38:12,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:38:12,700 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 01:38:12,966 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:38:12,978 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:38:12,982 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:38:12,983 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:38:12,983 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:38:12,984 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label17.c [2019-11-07 01:38:13,041 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9483acc2/aa157fe67ed44198892f8d5fc08f1250/FLAG3fe4169d1 [2019-11-07 01:38:13,586 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:38:13,587 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label17.c [2019-11-07 01:38:13,598 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9483acc2/aa157fe67ed44198892f8d5fc08f1250/FLAG3fe4169d1 [2019-11-07 01:38:13,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9483acc2/aa157fe67ed44198892f8d5fc08f1250 [2019-11-07 01:38:13,921 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:38:13,928 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:38:13,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:38:13,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:38:13,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:38:13,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:38:13" (1/1) ... [2019-11-07 01:38:13,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f99a56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:13, skipping insertion in model container [2019-11-07 01:38:13,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:38:13" (1/1) ... [2019-11-07 01:38:13,969 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:38:14,077 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:38:14,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:38:14,578 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:38:14,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:38:14,726 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:38:14,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:14 WrapperNode [2019-11-07 01:38:14,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:38:14,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:38:14,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:38:14,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:38:14,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:14" (1/1) ... [2019-11-07 01:38:14,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:14" (1/1) ... [2019-11-07 01:38:14,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:14" (1/1) ... [2019-11-07 01:38:14,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:14" (1/1) ... [2019-11-07 01:38:14,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:14" (1/1) ... [2019-11-07 01:38:14,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:14" (1/1) ... [2019-11-07 01:38:14,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:14" (1/1) ... [2019-11-07 01:38:14,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:38:14,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:38:14,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:38:14,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:38:14,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:14" (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 01:38:14,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:38:14,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:38:14,887 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:38:14,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:38:14,887 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:38:14,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:38:14,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:38:14,888 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:38:14,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:38:14,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:38:14,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:38:16,768 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:38:16,768 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:38:16,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:38:16 BoogieIcfgContainer [2019-11-07 01:38:16,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:38:16,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:38:16,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:38:16,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:38:16,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:38:13" (1/3) ... [2019-11-07 01:38:16,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f892df5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:38:16, skipping insertion in model container [2019-11-07 01:38:16,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:38:14" (2/3) ... [2019-11-07 01:38:16,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f892df5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:38:16, skipping insertion in model container [2019-11-07 01:38:16,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:38:16" (3/3) ... [2019-11-07 01:38:16,791 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label17.c [2019-11-07 01:38:16,801 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:38:16,811 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:38:16,823 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:38:16,854 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:38:16,854 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:38:16,856 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:38:16,856 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:38:16,856 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:38:16,857 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:38:16,857 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:38:16,857 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:38:16,886 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:38:16,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:38:16,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:16,902 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 01:38:16,905 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:16,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:16,913 INFO L82 PathProgramCache]: Analyzing trace with hash -219360713, now seen corresponding path program 1 times [2019-11-07 01:38:16,926 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:16,926 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88037832] [2019-11-07 01:38:16,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:17,435 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 01:38:17,436 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88037832] [2019-11-07 01:38:17,437 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:38:17,437 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:38:17,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591775985] [2019-11-07 01:38:17,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:38:17,447 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:17,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:38:17,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:38:17,463 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-11-07 01:38:18,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:18,034 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-11-07 01:38:18,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:38:18,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 01:38:18,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:18,068 INFO L225 Difference]: With dead ends: 273 [2019-11-07 01:38:18,068 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:38:18,075 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 01:38:18,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:38:18,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-07 01:38:18,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:38:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-11-07 01:38:18,188 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-11-07 01:38:18,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:18,190 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-11-07 01:38:18,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:38:18,190 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-11-07 01:38:18,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-07 01:38:18,199 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:18,199 INFO L410 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] [2019-11-07 01:38:18,199 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:18,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:18,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1874056050, now seen corresponding path program 1 times [2019-11-07 01:38:18,200 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:18,200 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061700801] [2019-11-07 01:38:18,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:18,314 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061700801] [2019-11-07 01:38:18,314 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:38:18,314 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:38:18,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779029508] [2019-11-07 01:38:18,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:38:18,317 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:18,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:38:18,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:38:18,317 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-11-07 01:38:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:19,013 INFO L93 Difference]: Finished difference Result 547 states and 1064 transitions. [2019-11-07 01:38:19,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 01:38:19,013 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-11-07 01:38:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:19,019 INFO L225 Difference]: With dead ends: 547 [2019-11-07 01:38:19,019 INFO L226 Difference]: Without dead ends: 377 [2019-11-07 01:38:19,021 INFO L630 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 [2019-11-07 01:38:19,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-11-07 01:38:19,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 355. [2019-11-07 01:38:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-11-07 01:38:19,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 642 transitions. [2019-11-07 01:38:19,064 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 642 transitions. Word has length 101 [2019-11-07 01:38:19,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:19,065 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 642 transitions. [2019-11-07 01:38:19,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:38:19,065 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 642 transitions. [2019-11-07 01:38:19,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-07 01:38:19,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:19,069 INFO L410 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] [2019-11-07 01:38:19,069 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:19,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:19,070 INFO L82 PathProgramCache]: Analyzing trace with hash 750786409, now seen corresponding path program 1 times [2019-11-07 01:38:19,070 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:19,070 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973831202] [2019-11-07 01:38:19,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:38:19,178 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973831202] [2019-11-07 01:38:19,178 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471436451] [2019-11-07 01:38:19,179 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 01:38:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:19,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:38:19,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:38:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:19,398 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:38:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:19,495 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556445704] [2019-11-07 01:38:19,525 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:38:19,525 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:38:19,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:38:19,539 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:38:19,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:38:19,761 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-11-07 01:38:20,857 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-11-07 01:38:28,650 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2019-11-07 01:38:28,858 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 12672 conjuctions. This might take some time... [2019-11-07 01:38:29,465 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2019-11-07 01:38:29,607 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 12672 conjuctions. This might take some time... [2019-11-07 01:38:30,295 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2019-11-07 01:38:30,478 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 12672 conjuctions. This might take some time... [2019-11-07 01:38:35,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:38:35,938 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:38:36,367 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2019-11-07 01:38:37,196 WARN L191 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 99 [2019-11-07 01:38:38,149 WARN L191 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 103 [2019-11-07 01:38:38,434 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-11-07 01:38:38,660 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-11-07 01:38:38,911 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-11-07 01:38:39,235 WARN L191 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 80 [2019-11-07 01:38:39,629 WARN L191 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 81 [2019-11-07 01:38:39,989 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2019-11-07 01:38:40,364 WARN L191 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2019-11-07 01:38:45,826 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:38:45,827 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [6, 5, 5] total 22 [2019-11-07 01:38:45,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986420252] [2019-11-07 01:38:45,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-07 01:38:45,829 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:45,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-07 01:38:45,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2019-11-07 01:38:45,833 INFO L87 Difference]: Start difference. First operand 355 states and 642 transitions. Second operand 14 states. [2019-11-07 01:38:46,020 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 01:38:46,556 WARN L191 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 103 [2019-11-07 01:38:47,304 WARN L191 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 116 [2019-11-07 01:38:47,985 WARN L191 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 107 [2019-11-07 01:38:48,325 WARN L191 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2019-11-07 01:38:48,654 WARN L191 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 93 [2019-11-07 01:38:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:51,416 INFO L93 Difference]: Finished difference Result 880 states and 1587 transitions. [2019-11-07 01:38:51,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 01:38:51,416 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 109 [2019-11-07 01:38:51,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:51,421 INFO L225 Difference]: With dead ends: 880 [2019-11-07 01:38:51,421 INFO L226 Difference]: Without dead ends: 530 [2019-11-07 01:38:51,425 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 234 SyntacticMatches, 81 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:38:51,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2019-11-07 01:38:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 526. [2019-11-07 01:38:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2019-11-07 01:38:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 827 transitions. [2019-11-07 01:38:51,461 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 827 transitions. Word has length 109 [2019-11-07 01:38:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:51,462 INFO L462 AbstractCegarLoop]: Abstraction has 526 states and 827 transitions. [2019-11-07 01:38:51,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-07 01:38:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 827 transitions. [2019-11-07 01:38:51,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-07 01:38:51,465 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:51,466 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 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] [2019-11-07 01:38:51,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:38:51,674 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:51,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:51,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1234609666, now seen corresponding path program 1 times [2019-11-07 01:38:51,674 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:51,675 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290093135] [2019-11-07 01:38:51,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:38:51,836 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290093135] [2019-11-07 01:38:51,836 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632863825] [2019-11-07 01:38:51,836 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 01:38:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:51,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:38:51,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:38:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:38:51,990 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:38:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:38:52,068 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [977462441] [2019-11-07 01:38:52,077 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:38:52,078 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:38:52,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:38:52,079 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:38:52,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:38:52,135 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-11-07 01:38:52,840 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 84 for LOIs