/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:36:15,464 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:36:15,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:36:15,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:36:15,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:36:15,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:36:15,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:36:15,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:36:15,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:36:15,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:36:15,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:36:15,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:36:15,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:36:15,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:36:15,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:36:15,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:36:15,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:36:15,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:36:15,516 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 01:36:15,540 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:36:15,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:36:15,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:36:15,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:36:15,543 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:36:15,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:36:15,544 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:36:15,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:36:15,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:36:15,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:36:15,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:36:15,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:36:15,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:36:15,546 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:36:15,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:36:15,546 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:36:15,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:36:15,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:36:15,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:36:15,547 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:36:15,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:36:15,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:36:15,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:36:15,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:36:15,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:36:15,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:36:15,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:36:15,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:36:15,549 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 01:36:15,827 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:36:15,842 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:36:15,847 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:36:15,849 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:36:15,850 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:36:15,850 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label46.c [2019-11-07 01:36:15,918 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b40fe5638/8e0bd6685abb405285fa24f64e964120/FLAGb95e1b5dd [2019-11-07 01:36:16,407 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:36:16,407 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label46.c [2019-11-07 01:36:16,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b40fe5638/8e0bd6685abb405285fa24f64e964120/FLAGb95e1b5dd [2019-11-07 01:36:16,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b40fe5638/8e0bd6685abb405285fa24f64e964120 [2019-11-07 01:36:16,701 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:36:16,703 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:36:16,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:36:16,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:36:16,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:36:16,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:16" (1/1) ... [2019-11-07 01:36:16,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c17596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:16, skipping insertion in model container [2019-11-07 01:36:16,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:16" (1/1) ... [2019-11-07 01:36:16,722 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:36:16,783 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:36:17,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:36:17,229 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:36:17,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:36:17,456 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:36:17,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:17 WrapperNode [2019-11-07 01:36:17,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:36:17,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:36:17,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:36:17,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:36:17,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:17" (1/1) ... [2019-11-07 01:36:17,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:17" (1/1) ... [2019-11-07 01:36:17,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:17" (1/1) ... [2019-11-07 01:36:17,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:17" (1/1) ... [2019-11-07 01:36:17,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:17" (1/1) ... [2019-11-07 01:36:17,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:17" (1/1) ... [2019-11-07 01:36:17,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:17" (1/1) ... [2019-11-07 01:36:17,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:36:17,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:36:17,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:36:17,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:36:17,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:17" (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 01:36:17,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:36:17,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:36:17,626 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:36:17,626 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:36:17,626 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:36:17,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:36:17,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:36:17,628 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:36:17,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:36:17,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:36:17,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:36:19,377 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:36:19,378 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:36:19,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:36:19 BoogieIcfgContainer [2019-11-07 01:36:19,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:36:19,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:36:19,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:36:19,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:36:19,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:36:16" (1/3) ... [2019-11-07 01:36:19,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aeea2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:36:19, skipping insertion in model container [2019-11-07 01:36:19,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:17" (2/3) ... [2019-11-07 01:36:19,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aeea2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:36:19, skipping insertion in model container [2019-11-07 01:36:19,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:36:19" (3/3) ... [2019-11-07 01:36:19,387 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label46.c [2019-11-07 01:36:19,397 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:36:19,405 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:36:19,417 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:36:19,442 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:36:19,443 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:36:19,443 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:36:19,443 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:36:19,443 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:36:19,444 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:36:19,463 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:36:19,463 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:36:19,494 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-11-07 01:36:19,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-07 01:36:19,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:36:19,507 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:36:19,509 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:36:19,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:36:19,515 INFO L82 PathProgramCache]: Analyzing trace with hash 826821476, now seen corresponding path program 1 times [2019-11-07 01:36:19,524 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:36:19,525 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439286381] [2019-11-07 01:36:19,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:36:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:36:19,986 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 01:36:19,987 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439286381] [2019-11-07 01:36:19,988 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:36:19,988 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:36:19,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635061159] [2019-11-07 01:36:19,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:36:19,997 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:36:20,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:36:20,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:36:20,015 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-11-07 01:36:20,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:36:20,559 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-11-07 01:36:20,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:36:20,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-11-07 01:36:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:36:20,581 INFO L225 Difference]: With dead ends: 246 [2019-11-07 01:36:20,582 INFO L226 Difference]: Without dead ends: 157 [2019-11-07 01:36:20,588 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 01:36:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-07 01:36:20,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-11-07 01:36:20,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-07 01:36:20,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 285 transitions. [2019-11-07 01:36:20,685 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 285 transitions. Word has length 77 [2019-11-07 01:36:20,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:36:20,686 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 285 transitions. [2019-11-07 01:36:20,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:36:20,687 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 285 transitions. [2019-11-07 01:36:20,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:36:20,691 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:36:20,691 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 01:36:20,692 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:36:20,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:36:20,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1022494757, now seen corresponding path program 1 times [2019-11-07 01:36:20,692 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:36:20,693 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729611634] [2019-11-07 01:36:20,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:36:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:36:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:36:20,834 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729611634] [2019-11-07 01:36:20,834 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:36:20,834 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:36:20,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719453079] [2019-11-07 01:36:20,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:36:20,837 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:36:20,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:36:20,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:36:20,838 INFO L87 Difference]: Start difference. First operand 157 states and 285 transitions. Second operand 5 states. [2019-11-07 01:36:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:36:21,371 INFO L93 Difference]: Finished difference Result 479 states and 892 transitions. [2019-11-07 01:36:21,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:36:21,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2019-11-07 01:36:21,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:36:21,377 INFO L225 Difference]: With dead ends: 479 [2019-11-07 01:36:21,377 INFO L226 Difference]: Without dead ends: 327 [2019-11-07 01:36:21,380 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:36:21,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-11-07 01:36:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 317. [2019-11-07 01:36:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-11-07 01:36:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 546 transitions. [2019-11-07 01:36:21,410 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 546 transitions. Word has length 86 [2019-11-07 01:36:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:36:21,410 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 546 transitions. [2019-11-07 01:36:21,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:36:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 546 transitions. [2019-11-07 01:36:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-07 01:36:21,414 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:36:21,415 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:21,415 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:36:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:36:21,416 INFO L82 PathProgramCache]: Analyzing trace with hash -498199828, now seen corresponding path program 1 times [2019-11-07 01:36:21,416 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:36:21,416 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120253319] [2019-11-07 01:36:21,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:36:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:36:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:36:21,593 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120253319] [2019-11-07 01:36:21,593 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439026857] [2019-11-07 01:36:21,594 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 01:36:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:36:21,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:36:21,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:36:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:36:21,798 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:36:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:36:21,903 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [30559154] [2019-11-07 01:36:21,950 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-11-07 01:36:21,950 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:36:21,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:36:21,964 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:36:21,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:36:22,122 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs [2019-11-07 01:36:23,082 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 180 [2019-11-07 01:36:23,618 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 141 for LOIs [2019-11-07 01:36:23,971 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-11-07 01:36:24,160 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-11-07 01:36:24,609 WARN L191 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 149 [2019-11-07 01:36:24,844 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-11-07 01:36:25,124 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-11-07 01:36:25,298 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-11-07 01:36:25,542 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-11-07 01:36:25,727 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-11-07 01:36:25,969 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:26,128 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:26,630 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 148 [2019-11-07 01:36:26,782 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:27,011 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:27,163 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:27,400 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:27,547 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:28,024 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 148 [2019-11-07 01:36:28,159 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:28,347 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:28,481 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:28,796 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 148 [2019-11-07 01:36:28,900 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:29,070 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 148 [2019-11-07 01:36:29,232 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:29,917 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:30,541 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:30,926 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 148 [2019-11-07 01:36:31,356 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 147 [2019-11-07 01:36:31,644 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-11-07 01:36:32,206 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 147 [2019-11-07 01:36:32,450 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 147 [2019-11-07 01:36:32,562 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-11-07 01:36:32,709 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 147 [2019-11-07 01:36:32,934 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 147 [2019-11-07 01:36:33,197 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-11-07 01:36:33,521 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 147 [2019-11-07 01:36:34,350 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-11-07 01:36:35,287 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 146 [2019-11-07 01:36:37,795 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2019-11-07 01:36:39,294 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2019-11-07 01:36:39,408 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2019-11-07 01:36:39,568 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2019-11-07 01:36:39,682 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2019-11-07 01:36:39,842 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2019-11-07 01:36:39,961 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2019-11-07 01:36:40,120 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2019-11-07 01:36:40,234 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2019-11-07 01:36:40,425 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 124 [2019-11-07 01:36:40,775 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 42