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_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:41:19,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:41:19,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:41:19,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:41:19,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:41:19,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:41:19,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:41:19,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:41:19,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:41:19,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:41:19,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:41:19,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:41:19,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:41:19,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:41:19,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:41:19,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:41:19,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:41:19,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:41:19,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:41:19,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:41:19,510 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 01:41:19,525 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:41:19,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:41:19,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:41:19,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:41:19,527 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:41:19,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:41:19,528 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:41:19,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:41:19,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:41:19,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:41:19,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:41:19,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:41:19,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:41:19,529 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:41:19,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:41:19,529 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:41:19,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:41:19,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:41:19,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:41:19,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:41:19,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:41:19,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:41:19,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:41:19,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:41:19,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:41:19,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:41:19,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:41:19,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:41:19,532 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 01:41:19,829 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:41:19,842 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:41:19,845 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:41:19,847 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:41:19,847 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:41:19,848 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label09.c [2019-10-15 01:41:19,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4474686a7/392345d700774eebb205740ec637e346/FLAG8ab2d5a85 [2019-10-15 01:41:20,516 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:41:20,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label09.c [2019-10-15 01:41:20,532 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4474686a7/392345d700774eebb205740ec637e346/FLAG8ab2d5a85 [2019-10-15 01:41:20,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4474686a7/392345d700774eebb205740ec637e346 [2019-10-15 01:41:20,791 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:41:20,793 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:41:20,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:20,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:41:20,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:41:20,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:20" (1/1) ... [2019-10-15 01:41:20,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3304fef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:20, skipping insertion in model container [2019-10-15 01:41:20,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:20" (1/1) ... [2019-10-15 01:41:20,811 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:41:20,865 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:41:21,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:21,386 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:41:21,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:21,509 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:41:21,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21 WrapperNode [2019-10-15 01:41:21,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:21,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:41:21,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:41:21,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:41:21,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (1/1) ... [2019-10-15 01:41:21,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (1/1) ... [2019-10-15 01:41:21,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (1/1) ... [2019-10-15 01:41:21,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (1/1) ... [2019-10-15 01:41:21,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (1/1) ... [2019-10-15 01:41:21,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (1/1) ... [2019-10-15 01:41:21,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (1/1) ... [2019-10-15 01:41:21,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:41:21,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:41:21,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:41:21,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:41:21,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (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 01:41:21,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:41:21,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:41:21,703 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:41:21,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:41:21,703 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:41:21,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:41:21,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:41:21,704 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:41:21,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:41:21,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:41:21,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:41:23,737 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:41:23,738 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:41:23,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:23 BoogieIcfgContainer [2019-10-15 01:41:23,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:41:23,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:41:23,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:41:23,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:41:23,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:41:20" (1/3) ... [2019-10-15 01:41:23,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa35a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:23, skipping insertion in model container [2019-10-15 01:41:23,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (2/3) ... [2019-10-15 01:41:23,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa35a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:23, skipping insertion in model container [2019-10-15 01:41:23,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:23" (3/3) ... [2019-10-15 01:41:23,757 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label09.c [2019-10-15 01:41:23,770 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:41:23,781 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:41:23,792 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:41:23,826 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:41:23,826 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:41:23,826 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:41:23,826 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:41:23,827 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:41:23,827 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:41:23,827 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:41:23,827 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:41:23,859 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:41:23,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:41:23,868 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:23,869 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 01:41:23,870 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:23,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:23,875 INFO L82 PathProgramCache]: Analyzing trace with hash -219360201, now seen corresponding path program 1 times [2019-10-15 01:41:23,884 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:23,884 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245056826] [2019-10-15 01:41:23,885 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:23,885 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:23,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:24,300 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 01:41:24,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245056826] [2019-10-15 01:41:24,302 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:24,303 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:24,304 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041096317] [2019-10-15 01:41:24,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:24,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:24,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:24,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:24,335 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:41:24,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:24,911 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:41:24,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:24,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:41:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:24,929 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:41:24,929 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:41:24,933 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 01:41:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:41:24,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:41:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:41:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:41:25,004 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:41:25,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:25,005 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:41:25,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:25,006 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:41:25,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:41:25,011 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:25,011 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:25,012 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:25,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:25,012 INFO L82 PathProgramCache]: Analyzing trace with hash -701894980, now seen corresponding path program 1 times [2019-10-15 01:41:25,013 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:25,013 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050738027] [2019-10-15 01:41:25,013 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:25,014 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:25,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:25,275 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050738027] [2019-10-15 01:41:25,276 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:25,276 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:41:25,276 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040228652] [2019-10-15 01:41:25,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:41:25,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:25,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:41:25,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:41:25,280 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 4 states. [2019-10-15 01:41:26,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:26,075 INFO L93 Difference]: Finished difference Result 681 states and 1263 transitions. [2019-10-15 01:41:26,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:41:26,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-10-15 01:41:26,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:26,084 INFO L225 Difference]: With dead ends: 681 [2019-10-15 01:41:26,084 INFO L226 Difference]: Without dead ends: 511 [2019-10-15 01:41:26,087 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:41:26,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2019-10-15 01:41:26,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 427. [2019-10-15 01:41:26,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-10-15 01:41:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 732 transitions. [2019-10-15 01:41:26,133 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 732 transitions. Word has length 94 [2019-10-15 01:41:26,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:26,134 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 732 transitions. [2019-10-15 01:41:26,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:41:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 732 transitions. [2019-10-15 01:41:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-15 01:41:26,138 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:26,139 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:26,139 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:26,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:26,139 INFO L82 PathProgramCache]: Analyzing trace with hash -99584640, now seen corresponding path program 1 times [2019-10-15 01:41:26,140 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:26,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970464008] [2019-10-15 01:41:26,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:26,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:26,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:26,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970464008] [2019-10-15 01:41:26,244 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:26,244 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:41:26,244 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139785405] [2019-10-15 01:41:26,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:41:26,245 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:26,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:41:26,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:41:26,246 INFO L87 Difference]: Start difference. First operand 427 states and 732 transitions. Second operand 6 states. [2019-10-15 01:41:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:26,958 INFO L93 Difference]: Finished difference Result 1355 states and 2652 transitions. [2019-10-15 01:41:26,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:41:26,958 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2019-10-15 01:41:26,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:26,976 INFO L225 Difference]: With dead ends: 1355 [2019-10-15 01:41:26,977 INFO L226 Difference]: Without dead ends: 933 [2019-10-15 01:41:26,982 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 01:41:26,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2019-10-15 01:41:27,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 883. [2019-10-15 01:41:27,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2019-10-15 01:41:27,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1527 transitions. [2019-10-15 01:41:27,108 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1527 transitions. Word has length 96 [2019-10-15 01:41:27,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:27,108 INFO L462 AbstractCegarLoop]: Abstraction has 883 states and 1527 transitions. [2019-10-15 01:41:27,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:41:27,109 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1527 transitions. [2019-10-15 01:41:27,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 01:41:27,117 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:27,117 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1] [2019-10-15 01:41:27,117 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:27,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:27,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1241902533, now seen corresponding path program 1 times [2019-10-15 01:41:27,118 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:27,118 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263572384] [2019-10-15 01:41:27,118 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:27,119 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:27,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:41:27,230 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263572384] [2019-10-15 01:41:27,230 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701774026] [2019-10-15 01:41:27,230 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 01:41:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:27,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:27,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:27,428 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:27,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1255441855] [2019-10-15 01:41:27,550 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:27,551 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:27,557 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:27,566 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:27,567 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:27,873 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:41:29,900 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-10-15 01:41:38,040 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2019-10-15 01:41:38,110 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7480 conjuctions. This might take some time... [2019-10-15 01:41:38,484 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 42 [2019-10-15 01:41:38,769 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 15216 conjuctions. This might take some time... [2019-10-15 01:41:39,367 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 42 [2019-10-15 01:41:39,518 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 15216 conjuctions. This might take some time... [2019-10-15 01:41:40,266 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:41:40,284 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:41:40,530 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:41:40,819 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:41:41,108 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:41:41,446 WARN L191 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 82 [2019-10-15 01:41:41,720 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:41:41,972 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2019-10-15 01:41:42,241 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2019-10-15 01:41:42,540 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2019-10-15 01:41:43,259 WARN L191 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 90 [2019-10-15 01:41:43,562 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2019-10-15 01:41:46,405 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:41:46,406 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 5, 5] total 21 [2019-10-15 01:41:46,406 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205241297] [2019-10-15 01:41:46,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-15 01:41:46,409 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:46,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-15 01:41:46,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:41:46,410 INFO L87 Difference]: Start difference. First operand 883 states and 1527 transitions. Second operand 13 states. [2019-10-15 01:41:46,717 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:41:47,089 WARN L191 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2019-10-15 01:41:47,494 WARN L191 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2019-10-15 01:41:47,903 WARN L191 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 96 [2019-10-15 01:41:48,258 WARN L191 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:41:48,617 WARN L191 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:41:51,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:51,185 INFO L93 Difference]: Finished difference Result 1950 states and 3376 transitions. [2019-10-15 01:41:51,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:41:51,185 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 104 [2019-10-15 01:41:51,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:51,192 INFO L225 Difference]: With dead ends: 1950 [2019-10-15 01:41:51,192 INFO L226 Difference]: Without dead ends: 1072 [2019-10-15 01:41:51,197 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 226 SyntacticMatches, 74 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:41:51,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2019-10-15 01:41:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1066. [2019-10-15 01:41:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2019-10-15 01:41:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1742 transitions. [2019-10-15 01:41:51,269 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1742 transitions. Word has length 104 [2019-10-15 01:41:51,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:51,269 INFO L462 AbstractCegarLoop]: Abstraction has 1066 states and 1742 transitions. [2019-10-15 01:41:51,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-15 01:41:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1742 transitions. [2019-10-15 01:41:51,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-15 01:41:51,279 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:51,280 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:41:51,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:41:51,492 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:51,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:51,492 INFO L82 PathProgramCache]: Analyzing trace with hash -2048351728, now seen corresponding path program 1 times [2019-10-15 01:41:51,493 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:51,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437594329] [2019-10-15 01:41:51,493 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:51,494 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:51,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:41:51,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437594329] [2019-10-15 01:41:51,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736592365] [2019-10-15 01:41:51,645 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 01:41:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:51,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:51,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:41:51,858 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:41:51,928 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [202711169] [2019-10-15 01:41:51,941 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:51,942 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:51,944 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:51,944 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:51,944 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:52,088 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:41:53,611 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 84 for LOIs [2019-10-15 01:41:55,730 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2019-10-15 01:41:55,763 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 41 [2019-10-15 01:41:55,846 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 41 [2019-10-15 01:41:55,934 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:41:55,947 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:41:56,180 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:41:56,474 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:41:56,894 WARN L191 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 95 [2019-10-15 01:41:57,173 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 77 [2019-10-15 01:41:57,442 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2019-10-15 01:41:57,673 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2019-10-15 01:41:57,920 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68