/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/product-lines/elevator_spec9_product26.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:47:34,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:47:34,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:47:34,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 04:47:34,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:47:34,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:47:34,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:47:34,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:47:34,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:47:34,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:47:34,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:47:34,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:47:34,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:47:34,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:47:34,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:47:34,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:47:34,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:47:34,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:47:34,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:47:34,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:47:34,791 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:47:34,820 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:47:34,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:47:34,824 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:47:34,824 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:47:34,825 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:47:34,825 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:47:34,825 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:47:34,825 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:47:34,825 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:47:34,826 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:47:34,826 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:47:34,826 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:47:34,826 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:47:34,827 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:47:34,827 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:47:34,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:47:34,828 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:47:34,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:47:34,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:47:34,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:47:34,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:47:34,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:47:34,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:47:34,832 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:47:34,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:47:34,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:47:34,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:47:34,832 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:47:34,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:47:34,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:47:34,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:47:34,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:47:34,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:47:34,835 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:47:34,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:47:34,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:47:34,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:47:34,836 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:47:35,113 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:47:35,132 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:47:35,135 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:47:35,137 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:47:35,138 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:47:35,138 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec9_product26.cil.c [2019-11-24 04:47:35,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ab1d272b/f6e8b11ef0bd457b84784e7afeb39631/FLAG19c08e77c [2019-11-24 04:47:35,877 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:47:35,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec9_product26.cil.c [2019-11-24 04:47:35,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ab1d272b/f6e8b11ef0bd457b84784e7afeb39631/FLAG19c08e77c [2019-11-24 04:47:36,125 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ab1d272b/f6e8b11ef0bd457b84784e7afeb39631 [2019-11-24 04:47:36,137 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:47:36,139 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:47:36,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:47:36,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:47:36,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:47:36,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:47:36" (1/1) ... [2019-11-24 04:47:36,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336c0d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:47:36, skipping insertion in model container [2019-11-24 04:47:36,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:47:36" (1/1) ... [2019-11-24 04:47:36,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:47:36,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:47:36,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:47:36,963 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:47:37,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:47:37,182 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:47:37,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:47:37 WrapperNode [2019-11-24 04:47:37,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:47:37,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:47:37,183 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:47:37,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:47:37,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:47:37" (1/1) ... [2019-11-24 04:47:37,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:47:37" (1/1) ... [2019-11-24 04:47:37,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:47:37,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:47:37,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:47:37,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:47:37,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:47:37" (1/1) ... [2019-11-24 04:47:37,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:47:37" (1/1) ... [2019-11-24 04:47:37,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:47:37" (1/1) ... [2019-11-24 04:47:37,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:47:37" (1/1) ... [2019-11-24 04:47:37,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:47:37" (1/1) ... [2019-11-24 04:47:37,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:47:37" (1/1) ... [2019-11-24 04:47:37,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:47:37" (1/1) ... [2019-11-24 04:47:38,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:47:38,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:47:38,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:47:38,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:47:38,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:47:37" (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 [2019-11-24 04:47:38,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:47:38,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:47:38,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:47:38,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:48:31,831 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:48:31,831 INFO L284 CfgBuilder]: Removed 1113 assume(true) statements. [2019-11-24 04:48:31,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:48:31 BoogieIcfgContainer [2019-11-24 04:48:31,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:48:31,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:48:31,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:48:31,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:48:31,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:47:36" (1/3) ... [2019-11-24 04:48:31,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c51e704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:48:31, skipping insertion in model container [2019-11-24 04:48:31,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:47:37" (2/3) ... [2019-11-24 04:48:31,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c51e704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:48:31, skipping insertion in model container [2019-11-24 04:48:31,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:48:31" (3/3) ... [2019-11-24 04:48:31,841 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product26.cil.c [2019-11-24 04:48:31,851 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:48:31,859 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-24 04:48:31,870 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-24 04:48:31,910 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:48:31,910 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:48:31,910 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:48:31,910 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:48:31,911 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:48:31,911 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:48:31,911 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:48:31,911 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:48:31,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states. [2019-11-24 04:48:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:48:31,964 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:48:31,965 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:48:31,966 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:48:31,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:48:31,972 INFO L82 PathProgramCache]: Analyzing trace with hash -537076349, now seen corresponding path program 1 times [2019-11-24 04:48:31,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:48:31,981 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338103360] [2019-11-24 04:48:31,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:48:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:48:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:48:32,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338103360] [2019-11-24 04:48:32,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:48:32,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:48:32,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124339176] [2019-11-24 04:48:32,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:48:32,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:48:32,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:48:32,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:48:32,389 INFO L87 Difference]: Start difference. First operand 1429 states. Second operand 2 states. [2019-11-24 04:48:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:48:32,480 INFO L93 Difference]: Finished difference Result 1446 states and 2787 transitions. [2019-11-24 04:48:32,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:48:32,482 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-24 04:48:32,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:48:32,523 INFO L225 Difference]: With dead ends: 1446 [2019-11-24 04:48:32,523 INFO L226 Difference]: Without dead ends: 1427 [2019-11-24 04:48:32,529 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:48:32,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2019-11-24 04:48:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1427. [2019-11-24 04:48:32,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1427 states. [2019-11-24 04:48:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 2757 transitions. [2019-11-24 04:48:32,685 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 2757 transitions. Word has length 10 [2019-11-24 04:48:32,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:48:32,685 INFO L462 AbstractCegarLoop]: Abstraction has 1427 states and 2757 transitions. [2019-11-24 04:48:32,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:48:32,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 2757 transitions. [2019-11-24 04:48:32,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 04:48:32,691 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:48:32,692 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:48:32,692 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:48:32,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:48:32,693 INFO L82 PathProgramCache]: Analyzing trace with hash 389396076, now seen corresponding path program 1 times [2019-11-24 04:48:32,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:48:32,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642834752] [2019-11-24 04:48:32,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:48:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:48:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:48:32,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642834752] [2019-11-24 04:48:32,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:48:32,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:48:32,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347906767] [2019-11-24 04:48:32,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:48:32,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:48:32,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:48:32,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:48:32,913 INFO L87 Difference]: Start difference. First operand 1427 states and 2757 transitions. Second operand 3 states. [2019-11-24 04:48:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:48:33,397 INFO L93 Difference]: Finished difference Result 2501 states and 4825 transitions. [2019-11-24 04:48:33,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:48:33,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-24 04:48:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:48:33,410 INFO L225 Difference]: With dead ends: 2501 [2019-11-24 04:48:33,411 INFO L226 Difference]: Without dead ends: 1778 [2019-11-24 04:48:33,416 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:48:33,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2019-11-24 04:48:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1704. [2019-11-24 04:48:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2019-11-24 04:48:33,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 3289 transitions. [2019-11-24 04:48:33,471 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 3289 transitions. Word has length 11 [2019-11-24 04:48:33,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:48:33,471 INFO L462 AbstractCegarLoop]: Abstraction has 1704 states and 3289 transitions. [2019-11-24 04:48:33,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:48:33,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 3289 transitions. [2019-11-24 04:48:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:48:33,474 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:48:33,474 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:48:33,475 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:48:33,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:48:33,475 INFO L82 PathProgramCache]: Analyzing trace with hash -813594190, now seen corresponding path program 1 times [2019-11-24 04:48:33,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:48:33,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055241201] [2019-11-24 04:48:33,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:48:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:48:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:48:33,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055241201] [2019-11-24 04:48:33,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:48:33,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:48:33,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381072495] [2019-11-24 04:48:33,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:48:33,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:48:33,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:48:33,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:48:33,558 INFO L87 Difference]: Start difference. First operand 1704 states and 3289 transitions. Second operand 3 states. [2019-11-24 04:48:34,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:48:34,046 INFO L93 Difference]: Finished difference Result 3458 states and 6669 transitions. [2019-11-24 04:48:34,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:48:34,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 04:48:34,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:48:34,062 INFO L225 Difference]: With dead ends: 3458 [2019-11-24 04:48:34,062 INFO L226 Difference]: Without dead ends: 2471 [2019-11-24 04:48:34,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:48:34,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2019-11-24 04:48:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2247. [2019-11-24 04:48:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2247 states. [2019-11-24 04:48:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 4333 transitions. [2019-11-24 04:48:34,159 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 4333 transitions. Word has length 12 [2019-11-24 04:48:34,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:48:34,160 INFO L462 AbstractCegarLoop]: Abstraction has 2247 states and 4333 transitions. [2019-11-24 04:48:34,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:48:34,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 4333 transitions. [2019-11-24 04:48:34,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 04:48:34,163 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:48:34,163 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:48:34,163 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:48:34,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:48:34,164 INFO L82 PathProgramCache]: Analyzing trace with hash 548413237, now seen corresponding path program 1 times [2019-11-24 04:48:34,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:48:34,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783135135] [2019-11-24 04:48:34,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:48:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:48:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:48:34,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783135135] [2019-11-24 04:48:34,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:48:34,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:48:34,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748512839] [2019-11-24 04:48:34,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:48:34,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:48:34,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:48:34,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:48:34,278 INFO L87 Difference]: Start difference. First operand 2247 states and 4333 transitions. Second operand 3 states. [2019-11-24 04:48:34,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:48:34,738 INFO L93 Difference]: Finished difference Result 3764 states and 7255 transitions. [2019-11-24 04:48:34,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:48:34,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-24 04:48:34,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:48:34,755 INFO L225 Difference]: With dead ends: 3764 [2019-11-24 04:48:34,755 INFO L226 Difference]: Without dead ends: 2245 [2019-11-24 04:48:34,759 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:48:34,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2019-11-24 04:48:34,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2019-11-24 04:48:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2019-11-24 04:48:34,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 4323 transitions. [2019-11-24 04:48:34,840 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 4323 transitions. Word has length 13 [2019-11-24 04:48:34,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:48:34,840 INFO L462 AbstractCegarLoop]: Abstraction has 2245 states and 4323 transitions. [2019-11-24 04:48:34,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:48:34,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 4323 transitions. [2019-11-24 04:48:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-24 04:48:34,843 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:48:34,844 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:48:34,844 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:48:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:48:34,844 INFO L82 PathProgramCache]: Analyzing trace with hash -179029477, now seen corresponding path program 1 times [2019-11-24 04:48:34,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:48:34,845 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184530877] [2019-11-24 04:48:34,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:48:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:48:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:48:34,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184530877] [2019-11-24 04:48:34,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:48:34,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:48:34,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554727076] [2019-11-24 04:48:34,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:48:34,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:48:34,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:48:34,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:48:34,947 INFO L87 Difference]: Start difference. First operand 2245 states and 4323 transitions. Second operand 3 states. [2019-11-24 04:48:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:48:35,480 INFO L93 Difference]: Finished difference Result 5131 states and 9874 transitions. [2019-11-24 04:48:35,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:48:35,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-24 04:48:35,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:48:35,500 INFO L225 Difference]: With dead ends: 5131 [2019-11-24 04:48:35,500 INFO L226 Difference]: Without dead ends: 3617 [2019-11-24 04:48:35,504 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:48:35,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2019-11-24 04:48:35,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 3317. [2019-11-24 04:48:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3317 states. [2019-11-24 04:48:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 6376 transitions. [2019-11-24 04:48:35,609 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 6376 transitions. Word has length 14 [2019-11-24 04:48:35,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:48:35,609 INFO L462 AbstractCegarLoop]: Abstraction has 3317 states and 6376 transitions. [2019-11-24 04:48:35,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:48:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 6376 transitions. [2019-11-24 04:48:35,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:48:35,611 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:48:35,611 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:48:35,611 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:48:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:48:35,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1254917122, now seen corresponding path program 1 times [2019-11-24 04:48:35,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:48:35,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985952932] [2019-11-24 04:48:35,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:48:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:48:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:48:35,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985952932] [2019-11-24 04:48:35,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:48:35,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:48:35,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540654644] [2019-11-24 04:48:35,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:48:35,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:48:35,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:48:35,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:48:35,685 INFO L87 Difference]: Start difference. First operand 3317 states and 6376 transitions. Second operand 3 states. [2019-11-24 04:48:36,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:48:36,086 INFO L93 Difference]: Finished difference Result 3317 states and 6376 transitions. [2019-11-24 04:48:36,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:48:36,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-24 04:48:36,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:48:36,105 INFO L225 Difference]: With dead ends: 3317 [2019-11-24 04:48:36,106 INFO L226 Difference]: Without dead ends: 3310 [2019-11-24 04:48:36,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:48:36,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2019-11-24 04:48:36,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 3310. [2019-11-24 04:48:36,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3310 states. [2019-11-24 04:48:36,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3310 states to 3310 states and 6364 transitions. [2019-11-24 04:48:36,366 INFO L78 Accepts]: Start accepts. Automaton has 3310 states and 6364 transitions. Word has length 15 [2019-11-24 04:48:36,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:48:36,367 INFO L462 AbstractCegarLoop]: Abstraction has 3310 states and 6364 transitions. [2019-11-24 04:48:36,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:48:36,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3310 states and 6364 transitions. [2019-11-24 04:48:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-24 04:48:36,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:48:36,373 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] [2019-11-24 04:48:36,375 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:48:36,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:48:36,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1380183324, now seen corresponding path program 1 times [2019-11-24 04:48:36,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:48:36,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309237980] [2019-11-24 04:48:36,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:48:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:48:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:48:36,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309237980] [2019-11-24 04:48:36,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:48:36,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:48:36,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604727440] [2019-11-24 04:48:36,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:48:36,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:48:36,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:48:36,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:48:36,568 INFO L87 Difference]: Start difference. First operand 3310 states and 6364 transitions. Second operand 4 states. [2019-11-24 04:48:36,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:48:36,863 INFO L93 Difference]: Finished difference Result 7554 states and 14374 transitions. [2019-11-24 04:48:36,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:48:36,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-11-24 04:48:36,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:48:36,886 INFO L225 Difference]: With dead ends: 7554 [2019-11-24 04:48:36,886 INFO L226 Difference]: Without dead ends: 4592 [2019-11-24 04:48:36,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:48:36,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4592 states. [2019-11-24 04:48:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4592 to 3131. [2019-11-24 04:48:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3131 states. [2019-11-24 04:48:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 5953 transitions. [2019-11-24 04:48:37,021 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 5953 transitions. Word has length 30 [2019-11-24 04:48:37,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:48:37,021 INFO L462 AbstractCegarLoop]: Abstraction has 3131 states and 5953 transitions. [2019-11-24 04:48:37,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:48:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 5953 transitions. [2019-11-24 04:48:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-24 04:48:37,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:48:37,024 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] [2019-11-24 04:48:37,025 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:48:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:48:37,025 INFO L82 PathProgramCache]: Analyzing trace with hash -851567953, now seen corresponding path program 1 times [2019-11-24 04:48:37,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:48:37,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993149198] [2019-11-24 04:48:37,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:48:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:48:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:48:37,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993149198] [2019-11-24 04:48:37,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:48:37,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:48:37,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469621322] [2019-11-24 04:48:37,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:48:37,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:48:37,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:48:37,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:48:37,308 INFO L87 Difference]: Start difference. First operand 3131 states and 5953 transitions. Second operand 4 states. [2019-11-24 04:48:39,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:48:39,032 INFO L93 Difference]: Finished difference Result 6329 states and 12021 transitions. [2019-11-24 04:48:39,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:48:39,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-11-24 04:48:39,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:48:39,053 INFO L225 Difference]: With dead ends: 6329 [2019-11-24 04:48:39,054 INFO L226 Difference]: Without dead ends: 3421 [2019-11-24 04:48:39,059 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:48:39,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3421 states. [2019-11-24 04:48:39,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3421 to 3131. [2019-11-24 04:48:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3131 states. [2019-11-24 04:48:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 5878 transitions. [2019-11-24 04:48:39,171 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 5878 transitions. Word has length 31 [2019-11-24 04:48:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:48:39,172 INFO L462 AbstractCegarLoop]: Abstraction has 3131 states and 5878 transitions. [2019-11-24 04:48:39,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:48:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 5878 transitions. [2019-11-24 04:48:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-24 04:48:39,175 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:48:39,175 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] [2019-11-24 04:48:39,175 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:48:39,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:48:39,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1142266034, now seen corresponding path program 1 times [2019-11-24 04:48:39,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:48:39,176 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154217076] [2019-11-24 04:48:39,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:48:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:48:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:48:39,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154217076] [2019-11-24 04:48:39,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:48:39,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:48:39,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736247500] [2019-11-24 04:48:39,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:48:39,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:48:39,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:48:39,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:48:39,417 INFO L87 Difference]: Start difference. First operand 3131 states and 5878 transitions. Second operand 3 states. [2019-11-24 04:48:40,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:48:40,954 INFO L93 Difference]: Finished difference Result 8303 states and 15606 transitions. [2019-11-24 04:48:40,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:48:40,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2019-11-24 04:48:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:48:40,972 INFO L225 Difference]: With dead ends: 8303 [2019-11-24 04:48:40,973 INFO L226 Difference]: Without dead ends: 5416 [2019-11-24 04:48:40,978 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:48:40,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5416 states. [2019-11-24 04:48:41,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5416 to 3086. [2019-11-24 04:48:41,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3086 states. [2019-11-24 04:48:41,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 5758 transitions. [2019-11-24 04:48:41,126 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 5758 transitions. Word has length 36 [2019-11-24 04:48:41,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:48:41,128 INFO L462 AbstractCegarLoop]: Abstraction has 3086 states and 5758 transitions. [2019-11-24 04:48:41,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:48:41,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 5758 transitions. [2019-11-24 04:48:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-24 04:48:41,133 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:48:41,133 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] [2019-11-24 04:48:41,136 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:48:41,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:48:41,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1798606070, now seen corresponding path program 1 times [2019-11-24 04:48:41,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:48:41,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548025204] [2019-11-24 04:48:41,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:48:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:48:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:48:41,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548025204] [2019-11-24 04:48:41,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:48:41,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:48:41,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066389292] [2019-11-24 04:48:41,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:48:41,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:48:41,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:48:41,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:48:41,397 INFO L87 Difference]: Start difference. First operand 3086 states and 5758 transitions. Second operand 3 states. [2019-11-24 04:48:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:48:42,951 INFO L93 Difference]: Finished difference Result 8198 states and 15356 transitions. [2019-11-24 04:48:42,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:48:42,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-24 04:48:42,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:48:42,968 INFO L225 Difference]: With dead ends: 8198 [2019-11-24 04:48:42,968 INFO L226 Difference]: Without dead ends: 5383 [2019-11-24 04:48:42,973 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:48:42,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5383 states. [2019-11-24 04:48:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5383 to 3056. [2019-11-24 04:48:43,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3056 states. [2019-11-24 04:48:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 5653 transitions. [2019-11-24 04:48:43,117 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 5653 transitions. Word has length 37 [2019-11-24 04:48:43,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:48:43,117 INFO L462 AbstractCegarLoop]: Abstraction has 3056 states and 5653 transitions. [2019-11-24 04:48:43,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:48:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 5653 transitions. [2019-11-24 04:48:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-24 04:48:43,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:48:43,120 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] [2019-11-24 04:48:43,121 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:48:43,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:48:43,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1314455003, now seen corresponding path program 1 times [2019-11-24 04:48:43,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:48:43,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704997598] [2019-11-24 04:48:43,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:48:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:48:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:48:43,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704997598] [2019-11-24 04:48:43,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:48:43,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:48:43,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063055376] [2019-11-24 04:48:43,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:48:43,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:48:43,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:48:43,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:48:43,320 INFO L87 Difference]: Start difference. First operand 3056 states and 5653 transitions. Second operand 3 states. [2019-11-24 04:48:44,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:48:44,605 INFO L93 Difference]: Finished difference Result 8118 states and 15131 transitions. [2019-11-24 04:48:44,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:48:44,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-11-24 04:48:44,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:48:44,620 INFO L225 Difference]: With dead ends: 8118 [2019-11-24 04:48:44,621 INFO L226 Difference]: Without dead ends: 5365 [2019-11-24 04:48:44,626 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:48:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5365 states. [2019-11-24 04:48:44,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5365 to 3041. [2019-11-24 04:48:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2019-11-24 04:48:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 5563 transitions. [2019-11-24 04:48:44,786 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 5563 transitions. Word has length 39 [2019-11-24 04:48:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:48:44,787 INFO L462 AbstractCegarLoop]: Abstraction has 3041 states and 5563 transitions. [2019-11-24 04:48:44,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:48:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 5563 transitions. [2019-11-24 04:48:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-24 04:48:44,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:48:44,792 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] [2019-11-24 04:48:44,793 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:48:44,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:48:44,793 INFO L82 PathProgramCache]: Analyzing trace with hash -798818684, now seen corresponding path program 1 times [2019-11-24 04:48:44,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:48:44,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915686143] [2019-11-24 04:48:44,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:48:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat