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_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:42:17,373 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:42:17,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:42:17,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:42:17,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:42:17,442 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 01:42:17,464 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:42:17,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:42:17,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:42:17,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:42:17,467 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:42:17,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:42:17,467 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:42:17,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:42:17,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:42:17,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:42:17,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:42:17,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:42:17,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:42:17,470 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:42:17,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:42:17,470 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:42:17,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:42:17,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:42:17,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:42:17,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:42:17,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:42:17,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:17,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:42:17,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:42:17,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:42:17,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:42:17,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:42:17,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:42:17,473 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 01:42:17,751 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:42:17,764 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:42:17,768 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:42:17,769 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:42:17,770 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:42:17,770 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label34.c [2019-10-15 01:42:17,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df2975d49/81992332c19447a6a903acd804ff90dc/FLAG1af7f3311 [2019-10-15 01:42:18,340 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:42:18,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label34.c [2019-10-15 01:42:18,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df2975d49/81992332c19447a6a903acd804ff90dc/FLAG1af7f3311 [2019-10-15 01:42:18,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df2975d49/81992332c19447a6a903acd804ff90dc [2019-10-15 01:42:18,613 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:42:18,615 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:42:18,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:18,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:42:18,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:42:18,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:18" (1/1) ... [2019-10-15 01:42:18,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f2b4d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:18, skipping insertion in model container [2019-10-15 01:42:18,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:18" (1/1) ... [2019-10-15 01:42:18,631 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:42:18,683 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:42:19,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:19,255 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:42:19,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:19,376 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:42:19,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:19 WrapperNode [2019-10-15 01:42:19,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:19,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:42:19,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:42:19,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:42:19,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:19" (1/1) ... [2019-10-15 01:42:19,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:19" (1/1) ... [2019-10-15 01:42:19,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:19" (1/1) ... [2019-10-15 01:42:19,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:19" (1/1) ... [2019-10-15 01:42:19,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:19" (1/1) ... [2019-10-15 01:42:19,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:19" (1/1) ... [2019-10-15 01:42:19,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:19" (1/1) ... [2019-10-15 01:42:19,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:42:19,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:42:19,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:42:19,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:42:19,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:19" (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 01:42:19,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:42:19,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:42:19,586 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:42:19,586 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:42:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:42:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:42:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:42:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:42:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:42:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:42:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:42:21,525 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:42:21,525 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:42:21,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:21 BoogieIcfgContainer [2019-10-15 01:42:21,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:42:21,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:42:21,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:42:21,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:42:21,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:42:18" (1/3) ... [2019-10-15 01:42:21,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234b4a3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:21, skipping insertion in model container [2019-10-15 01:42:21,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:19" (2/3) ... [2019-10-15 01:42:21,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234b4a3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:21, skipping insertion in model container [2019-10-15 01:42:21,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:21" (3/3) ... [2019-10-15 01:42:21,537 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label34.c [2019-10-15 01:42:21,547 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:42:21,555 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:42:21,566 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:42:21,592 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:42:21,592 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:42:21,592 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:42:21,592 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:42:21,593 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:42:21,593 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:42:21,593 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:42:21,593 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:42:21,614 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:42:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:42:21,623 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:21,624 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 01:42:21,626 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:21,632 INFO L82 PathProgramCache]: Analyzing trace with hash -219366089, now seen corresponding path program 1 times [2019-10-15 01:42:21,642 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:21,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827112337] [2019-10-15 01:42:21,642 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:21,643 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:21,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:22,101 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 01:42:22,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827112337] [2019-10-15 01:42:22,103 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:22,104 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:22,104 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312545145] [2019-10-15 01:42:22,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:22,110 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:22,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:22,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:22,127 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:42:22,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:22,727 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:42:22,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:22,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:42:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:22,754 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:42:22,755 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:42:22,761 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 01:42:22,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:42:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:42:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:42:22,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-10-15 01:42:22,908 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-10-15 01:42:22,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:22,909 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-10-15 01:42:22,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:22,910 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-10-15 01:42:22,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-15 01:42:22,922 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:22,922 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 01:42:22,923 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:22,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1874061426, now seen corresponding path program 1 times [2019-10-15 01:42:22,925 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:22,925 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483739634] [2019-10-15 01:42:22,926 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:22,926 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:22,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:23,105 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 01:42:23,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483739634] [2019-10-15 01:42:23,106 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:23,106 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:42:23,106 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841492569] [2019-10-15 01:42:23,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:42:23,109 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:23,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:42:23,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:42:23,110 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-10-15 01:42:23,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:23,883 INFO L93 Difference]: Finished difference Result 549 states and 1065 transitions. [2019-10-15 01:42:23,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:42:23,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-10-15 01:42:23,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:23,890 INFO L225 Difference]: With dead ends: 549 [2019-10-15 01:42:23,890 INFO L226 Difference]: Without dead ends: 379 [2019-10-15 01:42:23,892 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 01:42:23,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2019-10-15 01:42:23,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 355. [2019-10-15 01:42:23,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-10-15 01:42:23,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 642 transitions. [2019-10-15 01:42:23,933 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 642 transitions. Word has length 101 [2019-10-15 01:42:23,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:23,934 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 642 transitions. [2019-10-15 01:42:23,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:42:23,934 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 642 transitions. [2019-10-15 01:42:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-15 01:42:23,936 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:23,937 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 01:42:23,937 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:23,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:23,938 INFO L82 PathProgramCache]: Analyzing trace with hash 750781033, now seen corresponding path program 1 times [2019-10-15 01:42:23,938 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:23,938 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253680279] [2019-10-15 01:42:23,938 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:23,938 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:23,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:24,072 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 01:42:24,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253680279] [2019-10-15 01:42:24,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645471907] [2019-10-15 01:42:24,073 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 01:42:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:24,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:24,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:24,289 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 01:42:24,290 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:24,375 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 01:42:24,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2029711689] [2019-10-15 01:42:24,420 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:24,420 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:24,426 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:24,434 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:24,435 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:24,782 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:26,175 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 134 [2019-10-15 01:42:27,042 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-10-15 01:42:37,003 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2019-10-15 01:42:37,085 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 9432 conjuctions. This might take some time... [2019-10-15 01:42:37,782 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 19 [2019-10-15 01:42:37,863 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 14496 conjuctions. This might take some time... [2019-10-15 01:42:38,719 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 19 [2019-10-15 01:42:38,792 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 14496 conjuctions. This might take some time... [2019-10-15 01:42:39,701 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:39,719 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:39,985 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:40,286 WARN L191 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:40,598 WARN L191 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:42:41,109 WARN L191 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 82 [2019-10-15 01:42:41,399 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:42:41,664 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2019-10-15 01:42:41,942 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2019-10-15 01:42:42,571 WARN L191 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2019-10-15 01:42:43,247 WARN L191 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 87 [2019-10-15 01:42:43,513 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2019-10-15 01:42:46,246 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:42:46,247 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 21 [2019-10-15 01:42:46,247 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788319481] [2019-10-15 01:42:46,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-15 01:42:46,250 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:46,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-15 01:42:46,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:42:46,251 INFO L87 Difference]: Start difference. First operand 355 states and 642 transitions. Second operand 13 states. [2019-10-15 01:42:46,581 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:46,965 WARN L191 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2019-10-15 01:42:47,384 WARN L191 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2019-10-15 01:42:47,848 WARN L191 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 96 [2019-10-15 01:42:48,201 WARN L191 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:42:48,567 WARN L191 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:42:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:51,132 INFO L93 Difference]: Finished difference Result 880 states and 1587 transitions. [2019-10-15 01:42:51,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:42:51,133 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 109 [2019-10-15 01:42:51,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:51,138 INFO L225 Difference]: With dead ends: 880 [2019-10-15 01:42:51,138 INFO L226 Difference]: Without dead ends: 530 [2019-10-15 01:42:51,141 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 236 SyntacticMatches, 80 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:42:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2019-10-15 01:42:51,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 526. [2019-10-15 01:42:51,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2019-10-15 01:42:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 827 transitions. [2019-10-15 01:42:51,172 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 827 transitions. Word has length 109 [2019-10-15 01:42:51,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:51,173 INFO L462 AbstractCegarLoop]: Abstraction has 526 states and 827 transitions. [2019-10-15 01:42:51,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-15 01:42:51,173 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 827 transitions. [2019-10-15 01:42:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 01:42:51,175 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:51,175 INFO L380 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] [2019-10-15 01:42:51,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:51,377 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:51,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:51,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1234615042, now seen corresponding path program 1 times [2019-10-15 01:42:51,379 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:51,379 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29293954] [2019-10-15 01:42:51,379 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:51,380 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:51,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:42:51,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29293954] [2019-10-15 01:42:51,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680014340] [2019-10-15 01:42:51,557 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 01:42:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:51,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:51,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:42:51,728 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:42:51,809 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1762725525] [2019-10-15 01:42:51,814 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:51,814 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:51,815 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:51,816 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:51,816 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:51,994 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:53,371 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 84 for LOIs