/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/systemc/token_ring.06.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 06:05:32,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 06:05:32,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 06:05:32,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 06:05:32,711 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 06:05:32,726 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 06:05:32,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 06:05:32,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 06:05:32,727 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 06:05:32,727 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 06:05:32,728 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 06:05:32,728 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 06:05:32,728 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 06:05:32,728 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 06:05:32,728 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 06:05:32,729 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 06:05:32,729 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 06:05:32,729 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 06:05:32,729 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 06:05:32,730 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 06:05:32,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 06:05:32,730 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 06:05:32,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 06:05:32,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 06:05:32,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 06:05:32,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 06:05:32,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 06:05:32,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 06:05:32,732 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 06:05:32,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 06:05:32,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 06:05:32,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 06:05:32,733 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 06:05:32,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 06:05:32,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 06:05:32,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 06:05:32,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 06:05:32,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 06:05:32,734 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 06:05:32,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 06:05:32,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 06:05:32,735 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 06:05:32,735 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 06:05:33,022 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 06:05:33,035 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 06:05:33,039 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 06:05:33,040 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 06:05:33,040 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 06:05:33,041 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.06.cil-1.c [2019-11-24 06:05:33,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09d726865/507aaa25eaf64faba59e0dd5e1022f5f/FLAG113127370 [2019-11-24 06:05:33,552 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 06:05:33,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.06.cil-1.c [2019-11-24 06:05:33,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09d726865/507aaa25eaf64faba59e0dd5e1022f5f/FLAG113127370 [2019-11-24 06:05:33,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09d726865/507aaa25eaf64faba59e0dd5e1022f5f [2019-11-24 06:05:33,936 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 06:05:33,937 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 06:05:33,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 06:05:33,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 06:05:33,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 06:05:33,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:05:33" (1/1) ... [2019-11-24 06:05:33,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b57d1a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:05:33, skipping insertion in model container [2019-11-24 06:05:33,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:05:33" (1/1) ... [2019-11-24 06:05:33,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 06:05:34,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 06:05:34,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:05:34,326 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 06:05:34,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:05:34,520 INFO L208 MainTranslator]: Completed translation [2019-11-24 06:05:34,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:05:34 WrapperNode [2019-11-24 06:05:34,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 06:05:34,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 06:05:34,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 06:05:34,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 06:05:34,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:05:34" (1/1) ... [2019-11-24 06:05:34,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:05:34" (1/1) ... [2019-11-24 06:05:34,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 06:05:34,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 06:05:34,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 06:05:34,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 06:05:34,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:05:34" (1/1) ... [2019-11-24 06:05:34,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:05:34" (1/1) ... [2019-11-24 06:05:34,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:05:34" (1/1) ... [2019-11-24 06:05:34,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:05:34" (1/1) ... [2019-11-24 06:05:34,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:05:34" (1/1) ... [2019-11-24 06:05:34,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:05:34" (1/1) ... [2019-11-24 06:05:34,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:05:34" (1/1) ... [2019-11-24 06:05:34,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 06:05:34,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 06:05:34,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 06:05:34,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 06:05:34,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:05:34" (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 06:05:34,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 06:05:34,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 06:05:38,275 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 06:05:38,275 INFO L284 CfgBuilder]: Removed 237 assume(true) statements. [2019-11-24 06:05:38,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:05:38 BoogieIcfgContainer [2019-11-24 06:05:38,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 06:05:38,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 06:05:38,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 06:05:38,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 06:05:38,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 06:05:33" (1/3) ... [2019-11-24 06:05:38,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bdb2107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:05:38, skipping insertion in model container [2019-11-24 06:05:38,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:05:34" (2/3) ... [2019-11-24 06:05:38,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bdb2107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:05:38, skipping insertion in model container [2019-11-24 06:05:38,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:05:38" (3/3) ... [2019-11-24 06:05:38,285 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.06.cil-1.c [2019-11-24 06:05:38,294 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 06:05:38,302 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 06:05:38,312 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 06:05:38,340 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 06:05:38,340 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 06:05:38,340 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 06:05:38,340 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 06:05:38,340 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 06:05:38,341 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 06:05:38,341 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 06:05:38,341 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 06:05:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states. [2019-11-24 06:05:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-24 06:05:38,374 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:05:38,375 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 06:05:38,375 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:05:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:05:38,382 INFO L82 PathProgramCache]: Analyzing trace with hash 330688912, now seen corresponding path program 1 times [2019-11-24 06:05:38,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:05:38,392 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807673060] [2019-11-24 06:05:38,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:05:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:05:38,581 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 06:05:38,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807673060] [2019-11-24 06:05:38,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:05:38,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:05:38,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649565073] [2019-11-24 06:05:38,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:05:38,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:05:38,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:05:38,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:05:38,607 INFO L87 Difference]: Start difference. First operand 333 states. Second operand 3 states. [2019-11-24 06:05:38,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:05:38,811 INFO L93 Difference]: Finished difference Result 927 states and 1418 transitions. [2019-11-24 06:05:38,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:05:38,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-11-24 06:05:38,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:05:38,835 INFO L225 Difference]: With dead ends: 927 [2019-11-24 06:05:38,835 INFO L226 Difference]: Without dead ends: 596 [2019-11-24 06:05:38,840 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 06:05:38,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2019-11-24 06:05:38,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 591. [2019-11-24 06:05:38,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2019-11-24 06:05:38,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 890 transitions. [2019-11-24 06:05:38,922 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 890 transitions. Word has length 31 [2019-11-24 06:05:38,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:05:38,922 INFO L462 AbstractCegarLoop]: Abstraction has 591 states and 890 transitions. [2019-11-24 06:05:38,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:05:38,922 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 890 transitions. [2019-11-24 06:05:38,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-24 06:05:38,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:05:38,924 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 06:05:38,924 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:05:38,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:05:38,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1341828719, now seen corresponding path program 1 times [2019-11-24 06:05:38,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:05:38,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421995284] [2019-11-24 06:05:38,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:05:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:05:39,012 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 06:05:39,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421995284] [2019-11-24 06:05:39,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:05:39,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:05:39,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444080627] [2019-11-24 06:05:39,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:05:39,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:05:39,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:05:39,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:05:39,017 INFO L87 Difference]: Start difference. First operand 591 states and 890 transitions. Second operand 3 states. [2019-11-24 06:05:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:05:39,134 INFO L93 Difference]: Finished difference Result 1665 states and 2505 transitions. [2019-11-24 06:05:39,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:05:39,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-11-24 06:05:39,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:05:39,141 INFO L225 Difference]: With dead ends: 1665 [2019-11-24 06:05:39,141 INFO L226 Difference]: Without dead ends: 1083 [2019-11-24 06:05:39,148 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 06:05:39,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2019-11-24 06:05:39,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1077. [2019-11-24 06:05:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1077 states. [2019-11-24 06:05:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1605 transitions. [2019-11-24 06:05:39,223 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1605 transitions. Word has length 31 [2019-11-24 06:05:39,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:05:39,224 INFO L462 AbstractCegarLoop]: Abstraction has 1077 states and 1605 transitions. [2019-11-24 06:05:39,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:05:39,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1605 transitions. [2019-11-24 06:05:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-24 06:05:39,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:05:39,226 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 06:05:39,226 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:05:39,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:05:39,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1362743600, now seen corresponding path program 1 times [2019-11-24 06:05:39,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:05:39,229 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959603879] [2019-11-24 06:05:39,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:05:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:05:39,296 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 06:05:39,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959603879] [2019-11-24 06:05:39,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:05:39,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:05:39,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348607127] [2019-11-24 06:05:39,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:05:39,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:05:39,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:05:39,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:05:39,300 INFO L87 Difference]: Start difference. First operand 1077 states and 1605 transitions. Second operand 3 states. [2019-11-24 06:05:39,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:05:39,418 INFO L93 Difference]: Finished difference Result 3051 states and 4543 transitions. [2019-11-24 06:05:39,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:05:39,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-11-24 06:05:39,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:05:39,430 INFO L225 Difference]: With dead ends: 3051 [2019-11-24 06:05:39,431 INFO L226 Difference]: Without dead ends: 1990 [2019-11-24 06:05:39,433 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 06:05:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2019-11-24 06:05:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1982. [2019-11-24 06:05:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1982 states. [2019-11-24 06:05:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 2920 transitions. [2019-11-24 06:05:39,502 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 2920 transitions. Word has length 31 [2019-11-24 06:05:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:05:39,503 INFO L462 AbstractCegarLoop]: Abstraction has 1982 states and 2920 transitions. [2019-11-24 06:05:39,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:05:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 2920 transitions. [2019-11-24 06:05:39,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-24 06:05:39,505 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:05:39,505 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 06:05:39,505 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:05:39,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:05:39,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1791871985, now seen corresponding path program 1 times [2019-11-24 06:05:39,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:05:39,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58959543] [2019-11-24 06:05:39,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:05:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:05:39,564 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 06:05:39,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58959543] [2019-11-24 06:05:39,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:05:39,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:05:39,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093269051] [2019-11-24 06:05:39,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:05:39,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:05:39,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:05:39,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:05:39,567 INFO L87 Difference]: Start difference. First operand 1982 states and 2920 transitions. Second operand 3 states. [2019-11-24 06:05:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:05:39,731 INFO L93 Difference]: Finished difference Result 5632 states and 8290 transitions. [2019-11-24 06:05:39,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:05:39,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-11-24 06:05:39,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:05:39,751 INFO L225 Difference]: With dead ends: 5632 [2019-11-24 06:05:39,752 INFO L226 Difference]: Without dead ends: 3673 [2019-11-24 06:05:39,756 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 06:05:39,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3673 states. [2019-11-24 06:05:39,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3673 to 3661. [2019-11-24 06:05:39,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3661 states. [2019-11-24 06:05:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3661 states to 3661 states and 5329 transitions. [2019-11-24 06:05:39,890 INFO L78 Accepts]: Start accepts. Automaton has 3661 states and 5329 transitions. Word has length 31 [2019-11-24 06:05:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:05:39,891 INFO L462 AbstractCegarLoop]: Abstraction has 3661 states and 5329 transitions. [2019-11-24 06:05:39,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:05:39,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3661 states and 5329 transitions. [2019-11-24 06:05:39,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-24 06:05:39,892 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:05:39,892 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 06:05:39,893 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:05:39,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:05:39,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1214900782, now seen corresponding path program 1 times [2019-11-24 06:05:39,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:05:39,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401340000] [2019-11-24 06:05:39,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:05:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:05:40,033 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 06:05:40,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401340000] [2019-11-24 06:05:40,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:05:40,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:05:40,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37418244] [2019-11-24 06:05:40,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:05:40,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:05:40,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:05:40,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:05:40,036 INFO L87 Difference]: Start difference. First operand 3661 states and 5329 transitions. Second operand 3 states. [2019-11-24 06:05:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:05:40,285 INFO L93 Difference]: Finished difference Result 10759 states and 15565 transitions. [2019-11-24 06:05:40,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:05:40,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-11-24 06:05:40,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:05:40,321 INFO L225 Difference]: With dead ends: 10759 [2019-11-24 06:05:40,322 INFO L226 Difference]: Without dead ends: 7100 [2019-11-24 06:05:40,329 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 06:05:40,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7100 states. [2019-11-24 06:05:40,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7100 to 6716. [2019-11-24 06:05:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6716 states. [2019-11-24 06:05:40,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6716 states to 6716 states and 9598 transitions. [2019-11-24 06:05:40,559 INFO L78 Accepts]: Start accepts. Automaton has 6716 states and 9598 transitions. Word has length 31 [2019-11-24 06:05:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:05:40,560 INFO L462 AbstractCegarLoop]: Abstraction has 6716 states and 9598 transitions. [2019-11-24 06:05:40,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:05:40,560 INFO L276 IsEmpty]: Start isEmpty. Operand 6716 states and 9598 transitions. [2019-11-24 06:05:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-24 06:05:40,569 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:05:40,569 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:05:40,570 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:05:40,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:05:40,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1794724063, now seen corresponding path program 1 times [2019-11-24 06:05:40,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:05:40,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593072671] [2019-11-24 06:05:40,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:05:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:05:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:05:40,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593072671] [2019-11-24 06:05:40,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:05:40,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:05:40,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735776425] [2019-11-24 06:05:40,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:05:40,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:05:40,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:05:40,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:05:40,663 INFO L87 Difference]: Start difference. First operand 6716 states and 9598 transitions. Second operand 3 states. [2019-11-24 06:05:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:05:41,111 INFO L93 Difference]: Finished difference Result 19536 states and 27840 transitions. [2019-11-24 06:05:41,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:05:41,112 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2019-11-24 06:05:41,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:05:41,189 INFO L225 Difference]: With dead ends: 19536 [2019-11-24 06:05:41,189 INFO L226 Difference]: Without dead ends: 12831 [2019-11-24 06:05:41,201 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 06:05:41,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12831 states. [2019-11-24 06:05:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12831 to 12379. [2019-11-24 06:05:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12379 states. [2019-11-24 06:05:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12379 states to 12379 states and 17467 transitions. [2019-11-24 06:05:41,659 INFO L78 Accepts]: Start accepts. Automaton has 12379 states and 17467 transitions. Word has length 64 [2019-11-24 06:05:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:05:41,660 INFO L462 AbstractCegarLoop]: Abstraction has 12379 states and 17467 transitions. [2019-11-24 06:05:41,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:05:41,660 INFO L276 IsEmpty]: Start isEmpty. Operand 12379 states and 17467 transitions. [2019-11-24 06:05:41,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-24 06:05:41,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:05:41,674 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:05:41,674 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:05:41,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:05:41,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1155939584, now seen corresponding path program 1 times [2019-11-24 06:05:41,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:05:41,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291316588] [2019-11-24 06:05:41,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:05:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:05:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:05:41,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291316588] [2019-11-24 06:05:41,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:05:41,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:05:41,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217551283] [2019-11-24 06:05:41,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:05:41,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:05:41,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:05:41,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:05:41,785 INFO L87 Difference]: Start difference. First operand 12379 states and 17467 transitions. Second operand 3 states. [2019-11-24 06:05:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:05:42,428 INFO L93 Difference]: Finished difference Result 35528 states and 50020 transitions. [2019-11-24 06:05:42,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:05:42,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2019-11-24 06:05:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:05:42,477 INFO L225 Difference]: With dead ends: 35528 [2019-11-24 06:05:42,478 INFO L226 Difference]: Without dead ends: 23166 [2019-11-24 06:05:42,496 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 06:05:42,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23166 states. [2019-11-24 06:05:43,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23166 to 22746. [2019-11-24 06:05:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22746 states. [2019-11-24 06:05:43,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22746 states to 22746 states and 31704 transitions. [2019-11-24 06:05:43,767 INFO L78 Accepts]: Start accepts. Automaton has 22746 states and 31704 transitions. Word has length 64 [2019-11-24 06:05:43,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:05:43,767 INFO L462 AbstractCegarLoop]: Abstraction has 22746 states and 31704 transitions. [2019-11-24 06:05:43,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:05:43,768 INFO L276 IsEmpty]: Start isEmpty. Operand 22746 states and 31704 transitions. [2019-11-24 06:05:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-24 06:05:43,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:05:43,787 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:05:43,787 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:05:43,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:05:43,788 INFO L82 PathProgramCache]: Analyzing trace with hash -494605793, now seen corresponding path program 1 times [2019-11-24 06:05:43,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:05:43,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936502405] [2019-11-24 06:05:43,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:05:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:05:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:05:43,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936502405] [2019-11-24 06:05:43,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:05:43,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 06:05:43,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884839269] [2019-11-24 06:05:43,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 06:05:43,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:05:43,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 06:05:43,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 06:05:43,885 INFO L87 Difference]: Start difference. First operand 22746 states and 31704 transitions. Second operand 4 states. [2019-11-24 06:05:44,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:05:44,599 INFO L93 Difference]: Finished difference Result 54238 states and 77594 transitions. [2019-11-24 06:05:44,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 06:05:44,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2019-11-24 06:05:44,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:05:44,667 INFO L225 Difference]: With dead ends: 54238 [2019-11-24 06:05:44,668 INFO L226 Difference]: Without dead ends: 31514 [2019-11-24 06:05:44,695 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 06:05:44,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31514 states. [2019-11-24 06:05:45,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31514 to 26586. [2019-11-24 06:05:45,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26586 states. [2019-11-24 06:05:45,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26586 states to 26586 states and 38360 transitions. [2019-11-24 06:05:45,426 INFO L78 Accepts]: Start accepts. Automaton has 26586 states and 38360 transitions. Word has length 64 [2019-11-24 06:05:45,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:05:45,426 INFO L462 AbstractCegarLoop]: Abstraction has 26586 states and 38360 transitions. [2019-11-24 06:05:45,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 06:05:45,427 INFO L276 IsEmpty]: Start isEmpty. Operand 26586 states and 38360 transitions. [2019-11-24 06:05:45,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-24 06:05:45,474 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:05:45,474 INFO L410 BasicCegarLoop]: trace histogram [3, 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] [2019-11-24 06:05:45,475 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:05:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:05:45,475 INFO L82 PathProgramCache]: Analyzing trace with hash 823667426, now seen corresponding path program 1 times [2019-11-24 06:05:45,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:05:45,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242343718] [2019-11-24 06:05:45,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:05:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:05:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:05:45,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242343718] [2019-11-24 06:05:45,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:05:45,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:05:45,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399099100] [2019-11-24 06:05:45,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:05:45,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:05:45,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:05:45,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:05:45,538 INFO L87 Difference]: Start difference. First operand 26586 states and 38360 transitions. Second operand 3 states. [2019-11-24 06:05:46,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:05:46,169 INFO L93 Difference]: Finished difference Result 42558 states and 61370 transitions. [2019-11-24 06:05:46,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:05:46,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2019-11-24 06:05:46,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:05:46,222 INFO L225 Difference]: With dead ends: 42558 [2019-11-24 06:05:46,222 INFO L226 Difference]: Without dead ends: 28058 [2019-11-24 06:05:46,240 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 06:05:46,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28058 states. [2019-11-24 06:05:46,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28058 to 26586. [2019-11-24 06:05:46,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26586 states. [2019-11-24 06:05:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26586 states to 26586 states and 37848 transitions. [2019-11-24 06:05:46,855 INFO L78 Accepts]: Start accepts. Automaton has 26586 states and 37848 transitions. Word has length 92 [2019-11-24 06:05:46,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:05:46,855 INFO L462 AbstractCegarLoop]: Abstraction has 26586 states and 37848 transitions. [2019-11-24 06:05:46,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:05:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand 26586 states and 37848 transitions. [2019-11-24 06:05:46,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-24 06:05:46,925 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:05:46,926 INFO L410 BasicCegarLoop]: trace histogram [3, 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] [2019-11-24 06:05:46,926 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:05:46,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:05:46,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1894742111, now seen corresponding path program 1 times [2019-11-24 06:05:46,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:05:46,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793943357] [2019-11-24 06:05:46,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:05:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:05:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:05:47,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793943357] [2019-11-24 06:05:47,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:05:47,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:05:47,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53063986] [2019-11-24 06:05:47,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 06:05:47,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:05:47,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 06:05:47,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 06:05:47,072 INFO L87 Difference]: Start difference. First operand 26586 states and 37848 transitions. Second operand 4 states. [2019-11-24 06:05:47,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:05:47,977 INFO L93 Difference]: Finished difference Result 41678 states and 59306 transitions. [2019-11-24 06:05:47,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 06:05:47,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2019-11-24 06:05:47,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:05:48,017 INFO L225 Difference]: With dead ends: 41678 [2019-11-24 06:05:48,017 INFO L226 Difference]: Without dead ends: 27306 [2019-11-24 06:05:48,034 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 06:05:48,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27306 states. [2019-11-24 06:05:48,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27306 to 26586. [2019-11-24 06:05:48,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26586 states. [2019-11-24 06:05:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26586 states to 26586 states and 37496 transitions. [2019-11-24 06:05:48,716 INFO L78 Accepts]: Start accepts. Automaton has 26586 states and 37496 transitions. Word has length 92 [2019-11-24 06:05:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:05:48,716 INFO L462 AbstractCegarLoop]: Abstraction has 26586 states and 37496 transitions. [2019-11-24 06:05:48,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 06:05:48,717 INFO L276 IsEmpty]: Start isEmpty. Operand 26586 states and 37496 transitions. [2019-11-24 06:05:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-24 06:05:48,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:05:48,742 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:05:48,742 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:05:48,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:05:48,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1350396859, now seen corresponding path program 1 times [2019-11-24 06:05:48,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:05:48,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809812804] [2019-11-24 06:05:48,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:05:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:05:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:05:48,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809812804] [2019-11-24 06:05:48,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:05:48,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:05:48,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331568148] [2019-11-24 06:05:48,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 06:05:48,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:05:48,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 06:05:48,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 06:05:48,891 INFO L87 Difference]: Start difference. First operand 26586 states and 37496 transitions. Second operand 4 states. [2019-11-24 06:05:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:05:50,101 INFO L93 Difference]: Finished difference Result 76710 states and 108478 transitions. [2019-11-24 06:05:50,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 06:05:50,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2019-11-24 06:05:50,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:05:50,157 INFO L225 Difference]: With dead ends: 76710 [2019-11-24 06:05:50,158 INFO L226 Difference]: Without dead ends: 50146 [2019-11-24 06:05:50,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 06:05:50,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50146 states. [2019-11-24 06:05:51,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50146 to 38778. [2019-11-24 06:05:51,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38778 states. [2019-11-24 06:05:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38778 states to 38778 states and 54664 transitions. [2019-11-24 06:05:51,996 INFO L78 Accepts]: Start accepts. Automaton has 38778 states and 54664 transitions. Word has length 93 [2019-11-24 06:05:51,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:05:51,996 INFO L462 AbstractCegarLoop]: Abstraction has 38778 states and 54664 transitions. [2019-11-24 06:05:51,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 06:05:51,996 INFO L276 IsEmpty]: Start isEmpty. Operand 38778 states and 54664 transitions. [2019-11-24 06:05:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-24 06:05:52,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:05:52,027 INFO L410 BasicCegarLoop]: trace histogram [3, 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] [2019-11-24 06:05:52,028 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:05:52,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:05:52,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1645301564, now seen corresponding path program 1 times [2019-11-24 06:05:52,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:05:52,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077364665] [2019-11-24 06:05:52,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:05:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:05:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:05:52,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077364665] [2019-11-24 06:05:52,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5683537] [2019-11-24 06:05:52,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:05:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:05:52,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-24 06:05:52,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:05:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:05:52,342 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:05:52,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:05:52,366 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:05:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:05:52,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 06:05:52,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [9] total 10 [2019-11-24 06:05:52,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003379713] [2019-11-24 06:05:52,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:05:52,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:05:52,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:05:52,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-24 06:05:52,381 INFO L87 Difference]: Start difference. First operand 38778 states and 54664 transitions. Second operand 3 states. [2019-11-24 06:05:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:05:54,151 INFO L93 Difference]: Finished difference Result 95266 states and 134612 transitions. [2019-11-24 06:05:54,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:05:54,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-11-24 06:05:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:05:54,283 INFO L225 Difference]: With dead ends: 95266 [2019-11-24 06:05:54,283 INFO L226 Difference]: Without dead ends: 56510 [2019-11-24 06:05:54,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-24 06:05:54,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56510 states. [2019-11-24 06:05:56,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56510 to 56506. [2019-11-24 06:05:56,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56506 states. [2019-11-24 06:05:56,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56506 states to 56506 states and 79584 transitions. [2019-11-24 06:05:56,298 INFO L78 Accepts]: Start accepts. Automaton has 56506 states and 79584 transitions. Word has length 94 [2019-11-24 06:05:56,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:05:56,298 INFO L462 AbstractCegarLoop]: Abstraction has 56506 states and 79584 transitions. [2019-11-24 06:05:56,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:05:56,298 INFO L276 IsEmpty]: Start isEmpty. Operand 56506 states and 79584 transitions. [2019-11-24 06:05:56,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-24 06:05:56,395 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:05:56,396 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:05:56,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:05:56,600 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:05:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:05:56,600 INFO L82 PathProgramCache]: Analyzing trace with hash 783452507, now seen corresponding path program 1 times [2019-11-24 06:05:56,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:05:56,601 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507712236] [2019-11-24 06:05:56,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:05:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:05:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:05:56,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507712236] [2019-11-24 06:05:56,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541376302] [2019-11-24 06:05:56,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:05:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:05:56,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-24 06:05:56,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:05:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:05:56,864 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:05:56,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:05:56,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:05:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:05:56,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 06:05:56,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7] total 8 [2019-11-24 06:05:56,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631459102] [2019-11-24 06:05:56,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:05:56,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:05:56,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:05:56,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-24 06:05:56,898 INFO L87 Difference]: Start difference. First operand 56506 states and 79584 transitions. Second operand 3 states. [2019-11-24 06:05:59,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:05:59,650 INFO L93 Difference]: Finished difference Result 163810 states and 230500 transitions. [2019-11-24 06:05:59,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:05:59,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-11-24 06:05:59,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:05:59,776 INFO L225 Difference]: With dead ends: 163810 [2019-11-24 06:05:59,776 INFO L226 Difference]: Without dead ends: 107326 [2019-11-24 06:05:59,827 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-24 06:05:59,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107326 states. [2019-11-24 06:06:02,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107326 to 107322. [2019-11-24 06:06:02,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107322 states. [2019-11-24 06:06:02,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107322 states to 107322 states and 150360 transitions. [2019-11-24 06:06:02,170 INFO L78 Accepts]: Start accepts. Automaton has 107322 states and 150360 transitions. Word has length 95 [2019-11-24 06:06:02,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:06:02,170 INFO L462 AbstractCegarLoop]: Abstraction has 107322 states and 150360 transitions. [2019-11-24 06:06:02,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:06:02,170 INFO L276 IsEmpty]: Start isEmpty. Operand 107322 states and 150360 transitions. [2019-11-24 06:06:02,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-24 06:06:02,254 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:06:02,255 INFO L410 BasicCegarLoop]: trace histogram [3, 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] [2019-11-24 06:06:02,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:06:02,458 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:06:02,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:06:02,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1478644984, now seen corresponding path program 1 times [2019-11-24 06:06:02,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:06:02,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109079089] [2019-11-24 06:06:02,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:06:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:06:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:06:02,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109079089] [2019-11-24 06:06:02,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782571461] [2019-11-24 06:06:02,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:06:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:06:02,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-24 06:06:02,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:06:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:06:02,724 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:06:02,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:06:02,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:06:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:06:04,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 06:06:04,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7] total 8 [2019-11-24 06:06:04,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881570537] [2019-11-24 06:06:04,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:06:04,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:06:04,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:06:04,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-24 06:06:04,243 INFO L87 Difference]: Start difference. First operand 107322 states and 150360 transitions. Second operand 3 states. [2019-11-24 06:06:06,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:06:06,916 INFO L93 Difference]: Finished difference Result 263246 states and 369496 transitions. [2019-11-24 06:06:06,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:06:06,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2019-11-24 06:06:06,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:06:07,114 INFO L225 Difference]: With dead ends: 263246 [2019-11-24 06:06:07,115 INFO L226 Difference]: Without dead ends: 155946 [2019-11-24 06:06:07,197 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-24 06:06:07,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155946 states. [2019-11-24 06:06:13,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155946 to 155942. [2019-11-24 06:06:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155942 states. [2019-11-24 06:06:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155942 states to 155942 states and 218004 transitions. [2019-11-24 06:06:13,424 INFO L78 Accepts]: Start accepts. Automaton has 155942 states and 218004 transitions. Word has length 96 [2019-11-24 06:06:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:06:13,424 INFO L462 AbstractCegarLoop]: Abstraction has 155942 states and 218004 transitions. [2019-11-24 06:06:13,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:06:13,424 INFO L276 IsEmpty]: Start isEmpty. Operand 155942 states and 218004 transitions. [2019-11-24 06:06:13,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-24 06:06:13,529 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:06:13,529 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:06:13,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:06:13,730 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:06:13,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:06:13,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1182955625, now seen corresponding path program 1 times [2019-11-24 06:06:13,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:06:13,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343437436] [2019-11-24 06:06:13,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:06:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:06:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:06:13,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343437436] [2019-11-24 06:06:13,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646666510] [2019-11-24 06:06:13,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:06:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:06:13,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-24 06:06:13,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:06:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:06:13,982 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:06:13,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:06:13,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:06:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:06:13,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 06:06:13,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7] total 8 [2019-11-24 06:06:13,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47798387] [2019-11-24 06:06:14,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:06:14,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:06:14,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:06:14,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-24 06:06:14,000 INFO L87 Difference]: Start difference. First operand 155942 states and 218004 transitions. Second operand 3 states. [2019-11-24 06:06:22,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:06:22,793 INFO L93 Difference]: Finished difference Result 450718 states and 629128 transitions. [2019-11-24 06:06:22,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:06:22,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2019-11-24 06:06:22,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:06:23,101 INFO L225 Difference]: With dead ends: 450718 [2019-11-24 06:06:23,101 INFO L226 Difference]: Without dead ends: 294798 [2019-11-24 06:06:23,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-24 06:06:23,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294798 states. [2019-11-24 06:06:33,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294798 to 294794. [2019-11-24 06:06:33,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294794 states. [2019-11-24 06:06:34,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294794 states to 294794 states and 409416 transitions. [2019-11-24 06:06:34,234 INFO L78 Accepts]: Start accepts. Automaton has 294794 states and 409416 transitions. Word has length 97 [2019-11-24 06:06:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:06:34,234 INFO L462 AbstractCegarLoop]: Abstraction has 294794 states and 409416 transitions. [2019-11-24 06:06:34,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:06:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 294794 states and 409416 transitions. [2019-11-24 06:06:34,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-24 06:06:34,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:06:34,452 INFO L410 BasicCegarLoop]: trace histogram [3, 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, 1] [2019-11-24 06:06:34,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:06:34,653 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:06:34,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:06:34,654 INFO L82 PathProgramCache]: Analyzing trace with hash 287918540, now seen corresponding path program 1 times [2019-11-24 06:06:34,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:06:34,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857574203] [2019-11-24 06:06:34,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:06:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:06:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:06:34,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857574203] [2019-11-24 06:06:34,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468632343] [2019-11-24 06:06:34,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:06:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:06:34,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-24 06:06:34,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:06:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:06:34,883 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:06:34,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:06:34,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:06:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:06:34,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 06:06:34,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7] total 8 [2019-11-24 06:06:34,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841144485] [2019-11-24 06:06:34,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:06:34,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:06:34,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:06:34,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-24 06:06:34,901 INFO L87 Difference]: Start difference. First operand 294794 states and 409416 transitions. Second operand 3 states.