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_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:43:00,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:43:00,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:43:00,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:43:00,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:43:00,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:43:00,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:43:00,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:43:00,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:43:00,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:43:00,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:43:00,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:43:00,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:43:00,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:43:00,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:43:00,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:43:00,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:43:00,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:43:00,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:43:00,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:43:00,619 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 01:43:00,646 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:43:00,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:43:00,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:43:00,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:43:00,648 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:43:00,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:43:00,648 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:43:00,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:43:00,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:43:00,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:43:00,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:43:00,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:43:00,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:43:00,649 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:43:00,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:43:00,650 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:43:00,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:43:00,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:43:00,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:43:00,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:43:00,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:43:00,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:43:00,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:43:00,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:43:00,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:43:00,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:43:00,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:43:00,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:43:00,652 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 01:43:00,923 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:43:00,939 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:43:00,943 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:43:00,944 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:43:00,945 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:43:00,945 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label53.c [2019-10-15 01:43:01,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/432ef7e22/df7fab625af1493ca39c6e7054fcbb43/FLAG48fe79ce5 [2019-10-15 01:43:01,541 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:43:01,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label53.c [2019-10-15 01:43:01,555 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/432ef7e22/df7fab625af1493ca39c6e7054fcbb43/FLAG48fe79ce5 [2019-10-15 01:43:01,852 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/432ef7e22/df7fab625af1493ca39c6e7054fcbb43 [2019-10-15 01:43:01,863 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:43:01,865 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:43:01,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:01,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:43:01,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:43:01,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:01" (1/1) ... [2019-10-15 01:43:01,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65599f9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:01, skipping insertion in model container [2019-10-15 01:43:01,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:01" (1/1) ... [2019-10-15 01:43:01,884 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:43:01,935 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:43:02,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:02,542 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:43:02,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:02,725 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:43:02,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:02 WrapperNode [2019-10-15 01:43:02,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:02,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:43:02,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:43:02,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:43:02,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:02" (1/1) ... [2019-10-15 01:43:02,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:02" (1/1) ... [2019-10-15 01:43:02,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:02" (1/1) ... [2019-10-15 01:43:02,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:02" (1/1) ... [2019-10-15 01:43:02,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:02" (1/1) ... [2019-10-15 01:43:02,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:02" (1/1) ... [2019-10-15 01:43:02,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:02" (1/1) ... [2019-10-15 01:43:02,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:43:02,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:43:02,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:43:02,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:43:02,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:02" (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 01:43:02,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:43:02,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:43:02,890 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:43:02,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:43:02,891 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:43:02,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:43:02,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:43:02,891 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:43:02,891 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:43:02,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:43:02,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:43:04,772 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:43:04,773 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:43:04,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:04 BoogieIcfgContainer [2019-10-15 01:43:04,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:43:04,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:43:04,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:43:04,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:43:04,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:43:01" (1/3) ... [2019-10-15 01:43:04,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8b1883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:04, skipping insertion in model container [2019-10-15 01:43:04,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:02" (2/3) ... [2019-10-15 01:43:04,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8b1883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:04, skipping insertion in model container [2019-10-15 01:43:04,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:04" (3/3) ... [2019-10-15 01:43:04,782 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label53.c [2019-10-15 01:43:04,792 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:43:04,799 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:43:04,811 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:43:04,836 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:43:04,836 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:43:04,836 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:43:04,836 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:43:04,836 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:43:04,837 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:43:04,837 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:43:04,837 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:43:04,857 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:43:04,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:43:04,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:04,868 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 01:43:04,870 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:04,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:04,876 INFO L82 PathProgramCache]: Analyzing trace with hash -219355849, now seen corresponding path program 1 times [2019-10-15 01:43:04,885 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:04,885 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318934794] [2019-10-15 01:43:04,885 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:04,886 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:04,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:05,280 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 01:43:05,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318934794] [2019-10-15 01:43:05,282 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:05,282 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:05,282 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040568263] [2019-10-15 01:43:05,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:05,289 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:05,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:05,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:05,312 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:43:05,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:05,874 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:43:05,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:05,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:43:05,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:05,921 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:43:05,921 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:43:05,927 INFO L600 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 [2019-10-15 01:43:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:43:06,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:43:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:43:06,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:43:06,024 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:43:06,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:06,026 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:43:06,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:43:06,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:43:06,041 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:06,041 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 01:43:06,042 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:06,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:06,043 INFO L82 PathProgramCache]: Analyzing trace with hash -701890628, now seen corresponding path program 1 times [2019-10-15 01:43:06,043 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:06,044 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261219449] [2019-10-15 01:43:06,044 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:06,044 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:06,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:06,235 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 01:43:06,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261219449] [2019-10-15 01:43:06,236 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:06,236 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:06,236 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135427558] [2019-10-15 01:43:06,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:06,239 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:06,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:06,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:06,240 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-15 01:43:06,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:06,619 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-10-15 01:43:06,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:06,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 01:43:06,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:06,624 INFO L225 Difference]: With dead ends: 513 [2019-10-15 01:43:06,624 INFO L226 Difference]: Without dead ends: 343 [2019-10-15 01:43:06,626 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 01:43:06,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-15 01:43:06,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-10-15 01:43:06,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-10-15 01:43:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 575 transitions. [2019-10-15 01:43:06,651 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 575 transitions. Word has length 94 [2019-10-15 01:43:06,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:06,652 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 575 transitions. [2019-10-15 01:43:06,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 575 transitions. [2019-10-15 01:43:06,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 01:43:06,654 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:06,654 INFO L380 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] [2019-10-15 01:43:06,654 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:06,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:06,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1307294305, now seen corresponding path program 1 times [2019-10-15 01:43:06,655 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:06,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487970701] [2019-10-15 01:43:06,656 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:06,656 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:06,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:06,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487970701] [2019-10-15 01:43:06,814 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:06,814 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:43:06,814 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093072273] [2019-10-15 01:43:06,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:43:06,815 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:06,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:43:06,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:43:06,816 INFO L87 Difference]: Start difference. First operand 343 states and 575 transitions. Second operand 6 states. [2019-10-15 01:43:07,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:07,428 INFO L93 Difference]: Finished difference Result 1059 states and 1887 transitions. [2019-10-15 01:43:07,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:43:07,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-15 01:43:07,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:07,435 INFO L225 Difference]: With dead ends: 1059 [2019-10-15 01:43:07,436 INFO L226 Difference]: Without dead ends: 721 [2019-10-15 01:43:07,439 INFO L600 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 [2019-10-15 01:43:07,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-15 01:43:07,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 703. [2019-10-15 01:43:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2019-10-15 01:43:07,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1169 transitions. [2019-10-15 01:43:07,501 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1169 transitions. Word has length 108 [2019-10-15 01:43:07,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:07,502 INFO L462 AbstractCegarLoop]: Abstraction has 703 states and 1169 transitions. [2019-10-15 01:43:07,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:43:07,502 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1169 transitions. [2019-10-15 01:43:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 01:43:07,506 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:07,506 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-15 01:43:07,506 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:07,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:07,507 INFO L82 PathProgramCache]: Analyzing trace with hash -89300748, now seen corresponding path program 1 times [2019-10-15 01:43:07,507 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:07,507 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583345400] [2019-10-15 01:43:07,508 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:07,508 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:07,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:07,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583345400] [2019-10-15 01:43:07,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144905699] [2019-10-15 01:43:07,711 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 01:43:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:07,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:43:07,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:07,972 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:08,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1439125733] [2019-10-15 01:43:08,115 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:43:08,115 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:08,121 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:08,129 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:08,130 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:08,359 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:43:10,303 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-10-15 01:43:19,395 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-10-15 01:43:19,471 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7608 conjuctions. This might take some time... [2019-10-15 01:43:19,699 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2019-10-15 01:43:20,142 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 23872 conjuctions. This might take some time... [2019-10-15 01:43:20,735 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2019-10-15 01:43:21,073 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 23872 conjuctions. This might take some time... [2019-10-15 01:43:21,763 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:43:21,774 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:43:22,073 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2019-10-15 01:43:22,319 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:43:22,615 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:43:22,943 WARN L191 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:43:23,426 WARN L191 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 82 [2019-10-15 01:43:23,703 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:43:23,951 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2019-10-15 01:43:24,210 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2019-10-15 01:43:24,766 WARN L191 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2019-10-15 01:43:25,337 WARN L191 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 77 [2019-10-15 01:43:25,593 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2019-10-15 01:43:29,392 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:43:29,393 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5, 12] total 25 [2019-10-15 01:43:29,393 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667800747] [2019-10-15 01:43:29,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:43:29,395 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:29,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:43:29,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:43:29,396 INFO L87 Difference]: Start difference. First operand 703 states and 1169 transitions. Second operand 25 states. [2019-10-15 01:43:29,713 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:43:30,084 WARN L191 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 93 [2019-10-15 01:43:30,463 WARN L191 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 99 [2019-10-15 01:43:30,855 WARN L191 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 96 [2019-10-15 01:43:31,203 WARN L191 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2019-10-15 01:43:31,572 WARN L191 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95 [2019-10-15 01:43:32,904 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2019-10-15 01:43:33,187 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2019-10-15 01:43:37,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:37,426 INFO L93 Difference]: Finished difference Result 2274 states and 4214 transitions. [2019-10-15 01:43:37,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-15 01:43:37,426 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 127 [2019-10-15 01:43:37,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:37,444 INFO L225 Difference]: With dead ends: 2274 [2019-10-15 01:43:37,444 INFO L226 Difference]: Without dead ends: 1576 [2019-10-15 01:43:37,451 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 281 SyntacticMatches, 98 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=598, Invalid=1852, Unknown=0, NotChecked=0, Total=2450 [2019-10-15 01:43:37,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2019-10-15 01:43:37,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1306. [2019-10-15 01:43:37,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1306 states. [2019-10-15 01:43:37,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 2216 transitions. [2019-10-15 01:43:37,531 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 2216 transitions. Word has length 127 [2019-10-15 01:43:37,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:37,531 INFO L462 AbstractCegarLoop]: Abstraction has 1306 states and 2216 transitions. [2019-10-15 01:43:37,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:43:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 2216 transitions. [2019-10-15 01:43:37,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-15 01:43:37,539 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:37,540 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:43:37,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:37,746 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:37,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:37,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1326224426, now seen corresponding path program 1 times [2019-10-15 01:43:37,747 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:37,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137329904] [2019-10-15 01:43:37,747 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:37,748 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:37,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:43:37,916 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137329904] [2019-10-15 01:43:37,916 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712020802] [2019-10-15 01:43:37,917 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 01:43:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:38,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:43:38,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:43:38,100 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:43:38,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [762497748] [2019-10-15 01:43:38,174 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:43:38,174 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:38,175 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:38,175 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:38,175 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:38,281 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:43:39,260 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 84 for LOIs