/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:40:25,410 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:40:25,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:40:25,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:40:25,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:40:25,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:40:25,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:40:25,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:40:25,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:40:25,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:40:25,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:40:25,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:40:25,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:40:25,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:40:25,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:40:25,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:40:25,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:40:25,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:40:25,505 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 01:40:25,543 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:40:25,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:40:25,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:40:25,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:40:25,545 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:40:25,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:40:25,546 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:40:25,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:40:25,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:40:25,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:40:25,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:40:25,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:40:25,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:40:25,547 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:40:25,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:40:25,547 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:40:25,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:40:25,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:40:25,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:40:25,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:40:25,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:40:25,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:40:25,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:40:25,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:40:25,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:40:25,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:40:25,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:40:25,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:40:25,556 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 01:40:25,869 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:40:25,891 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:40:25,894 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:40:25,896 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:40:25,897 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:40:25,897 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label50.c [2019-11-07 01:40:25,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e27acff5b/d6d4f4f794aa42f09d823869c8ccbb21/FLAG08fcb1722 [2019-11-07 01:40:26,592 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:40:26,593 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label50.c [2019-11-07 01:40:26,615 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e27acff5b/d6d4f4f794aa42f09d823869c8ccbb21/FLAG08fcb1722 [2019-11-07 01:40:26,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e27acff5b/d6d4f4f794aa42f09d823869c8ccbb21 [2019-11-07 01:40:26,874 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:40:26,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:40:26,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:40:26,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:40:26,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:40:26,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:26" (1/1) ... [2019-11-07 01:40:26,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4599ef75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:26, skipping insertion in model container [2019-11-07 01:40:26,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:26" (1/1) ... [2019-11-07 01:40:26,927 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:40:27,029 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:40:27,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:40:27,744 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:40:27,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:40:27,892 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:40:27,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:27 WrapperNode [2019-11-07 01:40:27,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:40:27,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:40:27,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:40:27,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:40:27,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:27" (1/1) ... [2019-11-07 01:40:27,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:27" (1/1) ... [2019-11-07 01:40:27,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:27" (1/1) ... [2019-11-07 01:40:27,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:27" (1/1) ... [2019-11-07 01:40:27,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:27" (1/1) ... [2019-11-07 01:40:28,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:27" (1/1) ... [2019-11-07 01:40:28,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:27" (1/1) ... [2019-11-07 01:40:28,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:40:28,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:40:28,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:40:28,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:40:28,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:27" (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 01:40:28,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:40:28,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:40:28,092 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:40:28,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:40:28,092 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:40:28,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:40:28,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:40:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:40:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:40:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:40:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:40:30,291 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:40:30,291 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:40:30,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:30 BoogieIcfgContainer [2019-11-07 01:40:30,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:40:30,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:40:30,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:40:30,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:40:30,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:40:26" (1/3) ... [2019-11-07 01:40:30,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de56d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:30, skipping insertion in model container [2019-11-07 01:40:30,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:27" (2/3) ... [2019-11-07 01:40:30,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de56d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:30, skipping insertion in model container [2019-11-07 01:40:30,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:30" (3/3) ... [2019-11-07 01:40:30,302 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label50.c [2019-11-07 01:40:30,312 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:40:30,320 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:40:30,332 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:40:30,358 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:40:30,359 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:40:30,359 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:40:30,359 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:40:30,359 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:40:30,359 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:40:30,359 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:40:30,360 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:40:30,380 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:40:30,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:40:30,390 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:30,391 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:40:30,393 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:30,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:30,399 INFO L82 PathProgramCache]: Analyzing trace with hash -220073893, now seen corresponding path program 1 times [2019-11-07 01:40:30,408 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:30,409 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38241964] [2019-11-07 01:40:30,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:30,834 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 01:40:30,835 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38241964] [2019-11-07 01:40:30,836 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:40:30,836 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:40:30,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585142870] [2019-11-07 01:40:30,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:40:30,843 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:30,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:40:30,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:40:30,864 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-11-07 01:40:31,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:31,462 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-11-07 01:40:31,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:40:31,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 01:40:31,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:31,481 INFO L225 Difference]: With dead ends: 273 [2019-11-07 01:40:31,481 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:40:31,485 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 01:40:31,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:40:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-07 01:40:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:40:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-11-07 01:40:31,568 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-11-07 01:40:31,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:31,570 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-11-07 01:40:31,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:40:31,570 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-11-07 01:40:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 01:40:31,584 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:31,584 INFO L410 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] [2019-11-07 01:40:31,585 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:31,585 INFO L82 PathProgramCache]: Analyzing trace with hash -702608672, now seen corresponding path program 1 times [2019-11-07 01:40:31,586 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:31,586 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921514607] [2019-11-07 01:40:31,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:31,766 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921514607] [2019-11-07 01:40:31,767 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:40:31,767 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:40:31,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540640624] [2019-11-07 01:40:31,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:40:31,770 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:31,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:40:31,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:40:31,770 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-11-07 01:40:32,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:32,215 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-11-07 01:40:32,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:40:32,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-11-07 01:40:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:32,220 INFO L225 Difference]: With dead ends: 513 [2019-11-07 01:40:32,221 INFO L226 Difference]: Without dead ends: 343 [2019-11-07 01:40:32,223 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 01:40:32,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-11-07 01:40:32,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-11-07 01:40:32,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-11-07 01:40:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 580 transitions. [2019-11-07 01:40:32,249 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 580 transitions. Word has length 94 [2019-11-07 01:40:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:32,249 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 580 transitions. [2019-11-07 01:40:32,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:40:32,250 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 580 transitions. [2019-11-07 01:40:32,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-07 01:40:32,252 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:32,252 INFO L410 BasicCegarLoop]: trace histogram [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, 1] [2019-11-07 01:40:32,252 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:32,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:32,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1246707500, now seen corresponding path program 1 times [2019-11-07 01:40:32,253 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:32,253 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869533507] [2019-11-07 01:40:32,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:32,350 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869533507] [2019-11-07 01:40:32,351 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:40:32,351 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:40:32,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163737455] [2019-11-07 01:40:32,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:40:32,352 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:32,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:40:32,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:40:32,353 INFO L87 Difference]: Start difference. First operand 343 states and 580 transitions. Second operand 6 states. [2019-11-07 01:40:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:33,168 INFO L93 Difference]: Finished difference Result 1059 states and 1889 transitions. [2019-11-07 01:40:33,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:40:33,171 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2019-11-07 01:40:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:33,182 INFO L225 Difference]: With dead ends: 1059 [2019-11-07 01:40:33,182 INFO L226 Difference]: Without dead ends: 721 [2019-11-07 01:40:33,186 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:40:33,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-11-07 01:40:33,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 705. [2019-11-07 01:40:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705 states. [2019-11-07 01:40:33,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1144 transitions. [2019-11-07 01:40:33,251 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1144 transitions. Word has length 100 [2019-11-07 01:40:33,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:33,252 INFO L462 AbstractCegarLoop]: Abstraction has 705 states and 1144 transitions. [2019-11-07 01:40:33,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:40:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1144 transitions. [2019-11-07 01:40:33,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-07 01:40:33,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:33,256 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:40:33,256 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:33,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1308012349, now seen corresponding path program 1 times [2019-11-07 01:40:33,257 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:33,257 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200803950] [2019-11-07 01:40:33,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:33,345 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200803950] [2019-11-07 01:40:33,345 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:40:33,345 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:40:33,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140690458] [2019-11-07 01:40:33,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:40:33,346 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:33,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:40:33,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:40:33,347 INFO L87 Difference]: Start difference. First operand 705 states and 1144 transitions. Second operand 6 states. [2019-11-07 01:40:34,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:34,182 INFO L93 Difference]: Finished difference Result 1783 states and 2979 transitions. [2019-11-07 01:40:34,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:40:34,183 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-11-07 01:40:34,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:34,192 INFO L225 Difference]: With dead ends: 1783 [2019-11-07 01:40:34,192 INFO L226 Difference]: Without dead ends: 1083 [2019-11-07 01:40:34,196 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:40:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2019-11-07 01:40:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1069. [2019-11-07 01:40:34,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1069 states. [2019-11-07 01:40:34,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1678 transitions. [2019-11-07 01:40:34,260 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1678 transitions. Word has length 108 [2019-11-07 01:40:34,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:34,261 INFO L462 AbstractCegarLoop]: Abstraction has 1069 states and 1678 transitions. [2019-11-07 01:40:34,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:40:34,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1678 transitions. [2019-11-07 01:40:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-07 01:40:34,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:34,267 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:40:34,267 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:34,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:34,268 INFO L82 PathProgramCache]: Analyzing trace with hash 4631830, now seen corresponding path program 1 times [2019-11-07 01:40:34,268 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:34,268 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079633767] [2019-11-07 01:40:34,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 01:40:34,398 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079633767] [2019-11-07 01:40:34,399 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945899081] [2019-11-07 01:40:34,399 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 01:40:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:34,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:40:34,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:40:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:40:34,615 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:40:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:40:34,735 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:40:34,735 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 6 [2019-11-07 01:40:34,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015052920] [2019-11-07 01:40:34,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:40:34,737 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:34,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:40:34,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:40:34,737 INFO L87 Difference]: Start difference. First operand 1069 states and 1678 transitions. Second operand 3 states. [2019-11-07 01:40:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:35,202 INFO L93 Difference]: Finished difference Result 2733 states and 4333 transitions. [2019-11-07 01:40:35,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:40:35,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-11-07 01:40:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:35,211 INFO L225 Difference]: With dead ends: 2733 [2019-11-07 01:40:35,212 INFO L226 Difference]: Without dead ends: 977 [2019-11-07 01:40:35,216 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 244 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:40:35,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2019-11-07 01:40:35,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 977. [2019-11-07 01:40:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 977 states. [2019-11-07 01:40:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1448 transitions. [2019-11-07 01:40:35,252 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1448 transitions. Word has length 121 [2019-11-07 01:40:35,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:35,253 INFO L462 AbstractCegarLoop]: Abstraction has 977 states and 1448 transitions. [2019-11-07 01:40:35,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:40:35,253 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1448 transitions. [2019-11-07 01:40:35,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-07 01:40:35,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:35,257 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:40:35,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:40:35,461 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:35,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:35,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1269666795, now seen corresponding path program 1 times [2019-11-07 01:40:35,462 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:35,462 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127578983] [2019-11-07 01:40:35,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 01:40:35,559 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127578983] [2019-11-07 01:40:35,560 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139910495] [2019-11-07 01:40:35,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:40:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:35,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:40:35,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:40:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 01:40:35,713 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:40:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:40:35,791 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1049263070] [2019-11-07 01:40:35,843 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:40:35,844 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:40:35,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:40:35,865 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:40:35,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:40:36,020 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-11-07 01:40:37,045 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 86 for LOIs [2019-11-07 01:40:48,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:40:48,367 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:40:48,788 WARN L191 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 79 [2019-11-07 01:40:49,137 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2019-11-07 01:40:49,436 WARN L191 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-11-07 01:40:49,756 WARN L191 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2019-11-07 01:40:50,045 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2019-11-07 01:40:50,278 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2019-11-07 01:40:50,515 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2019-11-07 01:40:50,814 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2019-11-07 01:40:51,455 WARN L191 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 82 [2019-11-07 01:40:51,766 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 85 [2019-11-07 01:40:52,123 WARN L191 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2019-11-07 01:40:59,598 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:40:59,599 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 13] total 23 [2019-11-07 01:40:59,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654482829] [2019-11-07 01:40:59,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:40:59,601 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:59,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:40:59,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:40:59,602 INFO L87 Difference]: Start difference. First operand 977 states and 1448 transitions. Second operand 23 states. [2019-11-07 01:40:59,762 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 01:41:00,074 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 91 [2019-11-07 01:41:00,433 WARN L191 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 97 [2019-11-07 01:41:00,808 WARN L191 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 94 [2019-11-07 01:41:01,140 WARN L191 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2019-11-07 01:41:01,453 WARN L191 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 92 [2019-11-07 01:41:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:03,797 INFO L93 Difference]: Finished difference Result 1952 states and 2870 transitions. [2019-11-07 01:41:03,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-07 01:41:03,798 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 131 [2019-11-07 01:41:03,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:03,805 INFO L225 Difference]: With dead ends: 1952 [2019-11-07 01:41:03,805 INFO L226 Difference]: Without dead ends: 980 [2019-11-07 01:41:03,809 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 292 SyntacticMatches, 93 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=266, Invalid=664, Unknown=0, NotChecked=0, Total=930 [2019-11-07 01:41:03,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2019-11-07 01:41:03,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 888. [2019-11-07 01:41:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2019-11-07 01:41:03,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1177 transitions. [2019-11-07 01:41:03,847 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1177 transitions. Word has length 131 [2019-11-07 01:41:03,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:03,847 INFO L462 AbstractCegarLoop]: Abstraction has 888 states and 1177 transitions. [2019-11-07 01:41:03,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:41:03,848 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1177 transitions. [2019-11-07 01:41:03,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 01:41:03,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:03,851 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:04,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:41:04,056 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:04,057 INFO L82 PathProgramCache]: Analyzing trace with hash 650523707, now seen corresponding path program 1 times [2019-11-07 01:41:04,057 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:04,057 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793777601] [2019-11-07 01:41:04,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:41:04,383 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793777601] [2019-11-07 01:41:04,383 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565177399] [2019-11-07 01:41:04,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:41:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:04,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:41:04,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:41:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 01:41:04,570 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:41:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 61 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 01:41:04,644 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [336417405] [2019-11-07 01:41:04,647 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:41:04,648 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:41:04,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:41:04,649 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:41:04,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:41:04,703 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs