/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/eca-rers2012/Problem02_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:32:58,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:32:58,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:32:58,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 23:32:58,642 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 [2019-11-23 23:32:58,657 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:32:58,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:32:58,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:32:58,658 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:32:58,658 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:32:58,658 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:32:58,659 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:32:58,659 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:32:58,659 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:32:58,659 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:32:58,659 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:32:58,659 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:32:58,660 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:32:58,660 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:32:58,660 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:32:58,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:32:58,661 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:32:58,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:32:58,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:32:58,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:32:58,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:32:58,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:32:58,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:32:58,662 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:32:58,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:32:58,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:32:58,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:32:58,663 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:32:58,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:32:58,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:32:58,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:32:58,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:32:58,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:32:58,664 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:32:58,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:32:58,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:32:58,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:32:58,665 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:32:58,968 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:32:58,987 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:32:58,991 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:32:58,992 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:32:58,993 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:32:58,993 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label39.c [2019-11-23 23:32:59,063 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38c3273ae/6f1ae122ffaa4643b23b47615d01cbc8/FLAG48ceb87a8 [2019-11-23 23:32:59,649 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:32:59,653 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label39.c [2019-11-23 23:32:59,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38c3273ae/6f1ae122ffaa4643b23b47615d01cbc8/FLAG48ceb87a8 [2019-11-23 23:32:59,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38c3273ae/6f1ae122ffaa4643b23b47615d01cbc8 [2019-11-23 23:32:59,970 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:32:59,971 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:32:59,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:32:59,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:32:59,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:32:59,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:32:59" (1/1) ... [2019-11-23 23:32:59,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@516cae5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:32:59, skipping insertion in model container [2019-11-23 23:32:59,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:32:59" (1/1) ... [2019-11-23 23:32:59,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:33:00,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:33:00,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:33:00,595 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:33:00,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:33:00,747 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:33:00,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00 WrapperNode [2019-11-23 23:33:00,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:33:00,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:33:00,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:33:00,749 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:33:00,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2019-11-23 23:33:00,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2019-11-23 23:33:00,849 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:33:00,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:33:00,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:33:00,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:33:00,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2019-11-23 23:33:00,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2019-11-23 23:33:00,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2019-11-23 23:33:00,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2019-11-23 23:33:00,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2019-11-23 23:33:00,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2019-11-23 23:33:00,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2019-11-23 23:33:00,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:33:00,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:33:00,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:33:00,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:33:00,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (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 [2019-11-23 23:33:00,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:33:00,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:33:03,149 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:33:03,150 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 23:33:03,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:33:03 BoogieIcfgContainer [2019-11-23 23:33:03,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:33:03,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:33:03,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:33:03,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:33:03,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:32:59" (1/3) ... [2019-11-23 23:33:03,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36125099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:33:03, skipping insertion in model container [2019-11-23 23:33:03,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (2/3) ... [2019-11-23 23:33:03,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36125099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:33:03, skipping insertion in model container [2019-11-23 23:33:03,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:33:03" (3/3) ... [2019-11-23 23:33:03,160 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label39.c [2019-11-23 23:33:03,170 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:33:03,178 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:33:03,189 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:33:03,215 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:33:03,215 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:33:03,216 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:33:03,216 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:33:03,216 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:33:03,216 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:33:03,216 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:33:03,217 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:33:03,234 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2019-11-23 23:33:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 23:33:03,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:33:03,245 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:33:03,245 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:33:03,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:33:03,251 INFO L82 PathProgramCache]: Analyzing trace with hash 925950345, now seen corresponding path program 1 times [2019-11-23 23:33:03,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:33:03,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581032148] [2019-11-23 23:33:03,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:33:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:33:03,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581032148] [2019-11-23 23:33:03,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:33:03,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:33:03,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595259187] [2019-11-23 23:33:03,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:33:03,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:33:03,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:33:03,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:33:03,674 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 4 states. [2019-11-23 23:33:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:33:04,591 INFO L93 Difference]: Finished difference Result 333 states and 641 transitions. [2019-11-23 23:33:04,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:33:04,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2019-11-23 23:33:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:33:04,611 INFO L225 Difference]: With dead ends: 333 [2019-11-23 23:33:04,612 INFO L226 Difference]: Without dead ends: 243 [2019-11-23 23:33:04,616 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:33:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-11-23 23:33:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2019-11-23 23:33:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-11-23 23:33:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 298 transitions. [2019-11-23 23:33:04,704 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 298 transitions. Word has length 80 [2019-11-23 23:33:04,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:33:04,706 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 298 transitions. [2019-11-23 23:33:04,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:33:04,706 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 298 transitions. [2019-11-23 23:33:04,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-23 23:33:04,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:33:04,716 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:33:04,716 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:33:04,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:33:04,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1028671102, now seen corresponding path program 1 times [2019-11-23 23:33:04,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:33:04,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485538511] [2019-11-23 23:33:04,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:33:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:33:04,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485538511] [2019-11-23 23:33:04,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:33:04,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 23:33:04,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143516229] [2019-11-23 23:33:04,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:33:04,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:33:04,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:33:04,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:33:04,921 INFO L87 Difference]: Start difference. First operand 163 states and 298 transitions. Second operand 4 states. [2019-11-23 23:33:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:33:05,631 INFO L93 Difference]: Finished difference Result 645 states and 1187 transitions. [2019-11-23 23:33:05,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:33:05,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2019-11-23 23:33:05,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:33:05,636 INFO L225 Difference]: With dead ends: 645 [2019-11-23 23:33:05,636 INFO L226 Difference]: Without dead ends: 483 [2019-11-23 23:33:05,641 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 [2019-11-23 23:33:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2019-11-23 23:33:05,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2019-11-23 23:33:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2019-11-23 23:33:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 788 transitions. [2019-11-23 23:33:05,700 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 788 transitions. Word has length 84 [2019-11-23 23:33:05,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:33:05,703 INFO L462 AbstractCegarLoop]: Abstraction has 483 states and 788 transitions. [2019-11-23 23:33:05,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:33:05,703 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 788 transitions. [2019-11-23 23:33:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-23 23:33:05,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:33:05,709 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-23 23:33:05,710 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:33:05,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:33:05,710 INFO L82 PathProgramCache]: Analyzing trace with hash -792073672, now seen corresponding path program 1 times [2019-11-23 23:33:05,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:33:05,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155787424] [2019-11-23 23:33:05,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:33:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:33:05,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155787424] [2019-11-23 23:33:05,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:33:05,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:33:05,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974998579] [2019-11-23 23:33:05,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:33:05,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:33:05,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:33:05,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:33:05,754 INFO L87 Difference]: Start difference. First operand 483 states and 788 transitions. Second operand 3 states. [2019-11-23 23:33:06,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:33:06,192 INFO L93 Difference]: Finished difference Result 1365 states and 2221 transitions. [2019-11-23 23:33:06,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:33:06,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2019-11-23 23:33:06,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:33:06,202 INFO L225 Difference]: With dead ends: 1365 [2019-11-23 23:33:06,202 INFO L226 Difference]: Without dead ends: 883 [2019-11-23 23:33:06,205 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:33:06,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2019-11-23 23:33:06,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 563. [2019-11-23 23:33:06,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2019-11-23 23:33:06,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 929 transitions. [2019-11-23 23:33:06,246 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 929 transitions. Word has length 90 [2019-11-23 23:33:06,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:33:06,246 INFO L462 AbstractCegarLoop]: Abstraction has 563 states and 929 transitions. [2019-11-23 23:33:06,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:33:06,246 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 929 transitions. [2019-11-23 23:33:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-23 23:33:06,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:33:06,249 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:33:06,249 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:33:06,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:33:06,250 INFO L82 PathProgramCache]: Analyzing trace with hash -833109491, now seen corresponding path program 1 times [2019-11-23 23:33:06,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:33:06,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421705829] [2019-11-23 23:33:06,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:33:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:33:06,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421705829] [2019-11-23 23:33:06,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:33:06,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:33:06,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34633797] [2019-11-23 23:33:06,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:33:06,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:33:06,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:33:06,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:33:06,295 INFO L87 Difference]: Start difference. First operand 563 states and 929 transitions. Second operand 3 states. [2019-11-23 23:33:06,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:33:06,763 INFO L93 Difference]: Finished difference Result 1445 states and 2382 transitions. [2019-11-23 23:33:06,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:33:06,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2019-11-23 23:33:06,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:33:06,770 INFO L225 Difference]: With dead ends: 1445 [2019-11-23 23:33:06,770 INFO L226 Difference]: Without dead ends: 883 [2019-11-23 23:33:06,773 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 [2019-11-23 23:33:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2019-11-23 23:33:06,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2019-11-23 23:33:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2019-11-23 23:33:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1344 transitions. [2019-11-23 23:33:06,798 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1344 transitions. Word has length 90 [2019-11-23 23:33:06,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:33:06,799 INFO L462 AbstractCegarLoop]: Abstraction has 883 states and 1344 transitions. [2019-11-23 23:33:06,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:33:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1344 transitions. [2019-11-23 23:33:06,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-23 23:33:06,801 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:33:06,802 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:33:06,802 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:33:06,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:33:06,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1750164066, now seen corresponding path program 1 times [2019-11-23 23:33:06,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:33:06,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419311650] [2019-11-23 23:33:06,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:33:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 23:33:06,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419311650] [2019-11-23 23:33:06,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:33:06,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:33:06,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765520846] [2019-11-23 23:33:06,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:33:06,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:33:06,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:33:06,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:33:06,857 INFO L87 Difference]: Start difference. First operand 883 states and 1344 transitions. Second operand 4 states. [2019-11-23 23:33:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:33:07,433 INFO L93 Difference]: Finished difference Result 2805 states and 4224 transitions. [2019-11-23 23:33:07,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:33:07,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2019-11-23 23:33:07,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:33:07,443 INFO L225 Difference]: With dead ends: 2805 [2019-11-23 23:33:07,443 INFO L226 Difference]: Without dead ends: 1923 [2019-11-23 23:33:07,445 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:33:07,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2019-11-23 23:33:07,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1203. [2019-11-23 23:33:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1203 states. [2019-11-23 23:33:07,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1769 transitions. [2019-11-23 23:33:07,481 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1769 transitions. Word has length 104 [2019-11-23 23:33:07,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:33:07,482 INFO L462 AbstractCegarLoop]: Abstraction has 1203 states and 1769 transitions. [2019-11-23 23:33:07,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:33:07,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1769 transitions. [2019-11-23 23:33:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 23:33:07,485 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:33:07,485 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 23:33:07,486 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:33:07,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:33:07,486 INFO L82 PathProgramCache]: Analyzing trace with hash -279026646, now seen corresponding path program 1 times [2019-11-23 23:33:07,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:33:07,487 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735363810] [2019-11-23 23:33:07,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:33:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:33:07,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735363810] [2019-11-23 23:33:07,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:33:07,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:33:07,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151315097] [2019-11-23 23:33:07,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:33:07,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:33:07,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:33:07,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:33:07,585 INFO L87 Difference]: Start difference. First operand 1203 states and 1769 transitions. Second operand 4 states. [2019-11-23 23:33:08,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:33:08,226 INFO L93 Difference]: Finished difference Result 2725 states and 3982 transitions. [2019-11-23 23:33:08,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:33:08,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2019-11-23 23:33:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:33:08,237 INFO L225 Difference]: With dead ends: 2725 [2019-11-23 23:33:08,237 INFO L226 Difference]: Without dead ends: 1523 [2019-11-23 23:33:08,240 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:33:08,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2019-11-23 23:33:08,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1363. [2019-11-23 23:33:08,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1363 states. [2019-11-23 23:33:08,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 1774 transitions. [2019-11-23 23:33:08,277 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 1774 transitions. Word has length 111 [2019-11-23 23:33:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:33:08,277 INFO L462 AbstractCegarLoop]: Abstraction has 1363 states and 1774 transitions. [2019-11-23 23:33:08,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:33:08,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 1774 transitions. [2019-11-23 23:33:08,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 23:33:08,283 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:33:08,283 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:33:08,284 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:33:08,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:33:08,287 INFO L82 PathProgramCache]: Analyzing trace with hash -130998907, now seen corresponding path program 1 times [2019-11-23 23:33:08,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:33:08,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250975387] [2019-11-23 23:33:08,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:33:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 23:33:08,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250975387] [2019-11-23 23:33:08,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:33:08,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 23:33:08,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316462900] [2019-11-23 23:33:08,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:33:08,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:33:08,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:33:08,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:33:08,378 INFO L87 Difference]: Start difference. First operand 1363 states and 1774 transitions. Second operand 4 states. [2019-11-23 23:33:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:33:09,103 INFO L93 Difference]: Finished difference Result 3205 states and 4207 transitions. [2019-11-23 23:33:09,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:33:09,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2019-11-23 23:33:09,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:33:09,113 INFO L225 Difference]: With dead ends: 3205 [2019-11-23 23:33:09,113 INFO L226 Difference]: Without dead ends: 1843 [2019-11-23 23:33:09,115 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 [2019-11-23 23:33:09,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2019-11-23 23:33:09,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1203. [2019-11-23 23:33:09,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1203 states. [2019-11-23 23:33:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1494 transitions. [2019-11-23 23:33:09,148 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1494 transitions. Word has length 113 [2019-11-23 23:33:09,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:33:09,148 INFO L462 AbstractCegarLoop]: Abstraction has 1203 states and 1494 transitions. [2019-11-23 23:33:09,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:33:09,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1494 transitions. [2019-11-23 23:33:09,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-23 23:33:09,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:33:09,152 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:33:09,152 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:33:09,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:33:09,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1177512871, now seen corresponding path program 1 times [2019-11-23 23:33:09,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:33:09,153 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316465215] [2019-11-23 23:33:09,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:33:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:33:09,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316465215] [2019-11-23 23:33:09,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:33:09,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:33:09,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583124555] [2019-11-23 23:33:09,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:33:09,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:33:09,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:33:09,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:33:09,221 INFO L87 Difference]: Start difference. First operand 1203 states and 1494 transitions. Second operand 3 states. [2019-11-23 23:33:09,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:33:09,567 INFO L93 Difference]: Finished difference Result 2725 states and 3337 transitions. [2019-11-23 23:33:09,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:33:09,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2019-11-23 23:33:09,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:33:09,574 INFO L225 Difference]: With dead ends: 2725 [2019-11-23 23:33:09,574 INFO L226 Difference]: Without dead ends: 1443 [2019-11-23 23:33:09,576 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 [2019-11-23 23:33:09,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2019-11-23 23:33:09,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1363. [2019-11-23 23:33:09,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1363 states. [2019-11-23 23:33:09,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 1612 transitions. [2019-11-23 23:33:09,610 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 1612 transitions. Word has length 120 [2019-11-23 23:33:09,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:33:09,610 INFO L462 AbstractCegarLoop]: Abstraction has 1363 states and 1612 transitions. [2019-11-23 23:33:09,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:33:09,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 1612 transitions. [2019-11-23 23:33:09,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-23 23:33:09,614 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:33:09,614 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-23 23:33:09,614 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:33:09,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:33:09,615 INFO L82 PathProgramCache]: Analyzing trace with hash 178145204, now seen corresponding path program 1 times [2019-11-23 23:33:09,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:33:09,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904694973] [2019-11-23 23:33:09,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:33:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 23:33:09,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904694973] [2019-11-23 23:33:09,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:33:09,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:33:09,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653312991] [2019-11-23 23:33:09,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:33:09,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:33:09,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:33:09,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:33:09,701 INFO L87 Difference]: Start difference. First operand 1363 states and 1612 transitions. Second operand 3 states. [2019-11-23 23:33:10,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:33:10,092 INFO L93 Difference]: Finished difference Result 3045 states and 3576 transitions. [2019-11-23 23:33:10,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:33:10,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2019-11-23 23:33:10,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:33:10,097 INFO L225 Difference]: With dead ends: 3045 [2019-11-23 23:33:10,097 INFO L226 Difference]: Without dead ends: 1203 [2019-11-23 23:33:10,099 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 [2019-11-23 23:33:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2019-11-23 23:33:10,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1123. [2019-11-23 23:33:10,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1123 states. [2019-11-23 23:33:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1260 transitions. [2019-11-23 23:33:10,121 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1260 transitions. Word has length 129 [2019-11-23 23:33:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:33:10,121 INFO L462 AbstractCegarLoop]: Abstraction has 1123 states and 1260 transitions. [2019-11-23 23:33:10,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:33:10,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1260 transitions. [2019-11-23 23:33:10,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-23 23:33:10,124 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:33:10,125 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:33:10,125 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:33:10,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:33:10,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1469786071, now seen corresponding path program 1 times [2019-11-23 23:33:10,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:33:10,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456308262] [2019-11-23 23:33:10,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:33:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 23:33:10,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456308262] [2019-11-23 23:33:10,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377883222] [2019-11-23 23:33:10,252 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 [2019-11-23 23:33:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:10,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:33:10,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:33:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 23:33:10,418 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:33:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 23:33:10,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:33:10,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2019-11-23 23:33:10,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260878014] [2019-11-23 23:33:10,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:33:10,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:33:10,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:33:10,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 23:33:10,462 INFO L87 Difference]: Start difference. First operand 1123 states and 1260 transitions. Second operand 3 states. [2019-11-23 23:33:10,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:33:10,747 INFO L93 Difference]: Finished difference Result 2165 states and 2412 transitions. [2019-11-23 23:33:10,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:33:10,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 143 [2019-11-23 23:33:10,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:33:10,751 INFO L225 Difference]: With dead ends: 2165 [2019-11-23 23:33:10,752 INFO L226 Difference]: Without dead ends: 883 [2019-11-23 23:33:10,754 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 23:33:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2019-11-23 23:33:10,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2019-11-23 23:33:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2019-11-23 23:33:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 965 transitions. [2019-11-23 23:33:10,776 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 965 transitions. Word has length 143 [2019-11-23 23:33:10,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:33:10,777 INFO L462 AbstractCegarLoop]: Abstraction has 883 states and 965 transitions. [2019-11-23 23:33:10,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:33:10,777 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 965 transitions. [2019-11-23 23:33:10,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-23 23:33:10,781 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:33:10,781 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:33:10,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:33:10,984 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:33:10,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:33:10,985 INFO L82 PathProgramCache]: Analyzing trace with hash -871464942, now seen corresponding path program 1 times [2019-11-23 23:33:10,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:33:10,985 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231838070] [2019-11-23 23:33:10,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:33:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 23:33:11,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231838070] [2019-11-23 23:33:11,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903063424] [2019-11-23 23:33:11,201 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 [2019-11-23 23:33:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:11,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 23:33:11,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:33:11,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 23:33:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 23:33:11,361 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:33:11,377 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-23 23:33:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 23:33:11,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:33:11,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 6 [2019-11-23 23:33:11,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256581429] [2019-11-23 23:33:11,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 23:33:11,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:33:11,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 23:33:11,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 23:33:11,411 INFO L87 Difference]: Start difference. First operand 883 states and 965 transitions. Second operand 5 states. [2019-11-23 23:33:11,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:33:11,937 INFO L93 Difference]: Finished difference Result 1706 states and 1865 transitions. [2019-11-23 23:33:11,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 23:33:11,937 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2019-11-23 23:33:11,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:33:11,942 INFO L225 Difference]: With dead ends: 1706 [2019-11-23 23:33:11,942 INFO L226 Difference]: Without dead ends: 904 [2019-11-23 23:33:11,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 335 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-23 23:33:11,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2019-11-23 23:33:11,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 883. [2019-11-23 23:33:11,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2019-11-23 23:33:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 952 transitions. [2019-11-23 23:33:11,962 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 952 transitions. Word has length 169 [2019-11-23 23:33:11,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:33:11,963 INFO L462 AbstractCegarLoop]: Abstraction has 883 states and 952 transitions. [2019-11-23 23:33:11,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 23:33:11,963 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 952 transitions. [2019-11-23 23:33:11,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-23 23:33:11,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:33:11,966 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:33:12,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:33:12,178 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:33:12,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:33:12,179 INFO L82 PathProgramCache]: Analyzing trace with hash -904064826, now seen corresponding path program 1 times [2019-11-23 23:33:12,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:33:12,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873895329] [2019-11-23 23:33:12,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:33:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 177 proven. 9 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 23:33:12,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873895329] [2019-11-23 23:33:12,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374172772] [2019-11-23 23:33:12,465 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 [2019-11-23 23:33:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:12,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:33:12,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:33:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-23 23:33:12,619 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:33:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-23 23:33:12,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:33:12,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 10 [2019-11-23 23:33:12,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161819011] [2019-11-23 23:33:12,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:33:12,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:33:12,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:33:12,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 23:33:12,660 INFO L87 Difference]: Start difference. First operand 883 states and 952 transitions. Second operand 4 states. [2019-11-23 23:33:13,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:33:13,138 INFO L93 Difference]: Finished difference Result 1765 states and 1911 transitions. [2019-11-23 23:33:13,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:33:13,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 202 [2019-11-23 23:33:13,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:33:13,142 INFO L225 Difference]: With dead ends: 1765 [2019-11-23 23:33:13,142 INFO L226 Difference]: Without dead ends: 643 [2019-11-23 23:33:13,148 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 23:33:13,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2019-11-23 23:33:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2019-11-23 23:33:13,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2019-11-23 23:33:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 667 transitions. [2019-11-23 23:33:13,170 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 667 transitions. Word has length 202 [2019-11-23 23:33:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:33:13,170 INFO L462 AbstractCegarLoop]: Abstraction has 643 states and 667 transitions. [2019-11-23 23:33:13,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:33:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 667 transitions. [2019-11-23 23:33:13,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-11-23 23:33:13,175 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:33:13,175 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:33:13,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:33:13,380 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:33:13,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:33:13,381 INFO L82 PathProgramCache]: Analyzing trace with hash 359739847, now seen corresponding path program 1 times [2019-11-23 23:33:13,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:33:13,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698601062] [2019-11-23 23:33:13,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:33:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 174 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:33:13,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698601062] [2019-11-23 23:33:13,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715145979] [2019-11-23 23:33:13,777 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 [2019-11-23 23:33:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:13,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 23:33:13,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:33:13,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 23:33:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 190 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:33:14,029 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:33:14,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 6 terms [2019-11-23 23:33:14,057 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 23:33:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 190 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:33:14,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [457859021] [2019-11-23 23:33:14,216 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2019-11-23 23:33:14,216 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:33:14,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:33:14,230 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:33:14,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:33:20,390 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 32 [2019-11-23 23:33:20,583 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5133 conjuctions. This might take some time... [2019-11-23 23:33:20,767 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 32 [2019-11-23 23:33:20,950 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5133 conjuctions. This might take some time... [2019-11-23 23:33:21,111 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 32 [2019-11-23 23:33:21,267 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5133 conjuctions. This might take some time... [2019-11-23 23:33:23,002 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-23 23:33:24,108 WARN L192 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 120 DAG size of output: 107 [2019-11-23 23:33:25,105 WARN L192 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 111 [2019-11-23 23:33:25,972 WARN L192 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 105 [2019-11-23 23:33:26,385 WARN L192 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2019-11-23 23:33:26,532 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-11-23 23:33:26,869 WARN L192 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2019-11-23 23:33:27,208 WARN L192 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2019-11-23 23:33:27,561 WARN L192 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2019-11-23 23:33:27,864 WARN L192 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2019-11-23 23:33:28,296 WARN L192 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2019-11-23 23:33:28,645 WARN L192 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2019-11-23 23:33:29,000 WARN L192 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2019-11-23 23:33:29,346 WARN L192 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2019-11-23 23:33:29,709 WARN L192 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2019-11-23 23:33:30,029 WARN L192 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2019-11-23 23:33:30,397 WARN L192 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2019-11-23 23:33:30,751 WARN L192 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2019-11-23 23:33:31,091 WARN L192 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2019-11-23 23:33:31,426 WARN L192 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2019-11-23 23:33:31,860 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 88 [2019-11-23 23:33:32,201 WARN L192 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2019-11-23 23:33:32,569 WARN L192 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2019-11-23 23:33:32,956 WARN L192 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2019-11-23 23:33:33,938 WARN L192 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 90 [2019-11-23 23:33:34,890 WARN L192 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2019-11-23 23:33:35,267 WARN L192 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2019-11-23 23:33:35,620 WARN L192 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2019-11-23 23:33:36,152 WARN L192 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2019-11-23 23:33:36,597 WARN L192 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2019-11-23 23:33:36,995 WARN L192 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2019-11-23 23:33:37,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-23 23:33:37,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [7, 5, 5] total 39 [2019-11-23 23:33:37,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80556330] [2019-11-23 23:33:37,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 23:33:37,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:33:37,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 23:33:37,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1356, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 23:33:37,037 INFO L87 Difference]: Start difference. First operand 643 states and 667 transitions. Second operand 32 states. [2019-11-23 23:33:38,004 WARN L192 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 101 [2019-11-23 23:33:38,838 WARN L192 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 105 [2019-11-23 23:33:39,778 WARN L192 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 110 [2019-11-23 23:33:40,682 WARN L192 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 113 [2019-11-23 23:33:41,561 WARN L192 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 114 [2019-11-23 23:33:42,469 WARN L192 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 115 [2019-11-23 23:33:43,418 WARN L192 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 115 [2019-11-23 23:33:44,697 WARN L192 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 142 DAG size of output: 118 [2019-11-23 23:33:46,030 WARN L192 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 130 DAG size of output: 128 [2019-11-23 23:33:47,281 WARN L192 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 119 DAG size of output: 86 [2019-11-23 23:33:48,500 WARN L192 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 143 DAG size of output: 119 [2019-11-23 23:33:49,470 WARN L192 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 90 [2019-11-23 23:33:50,790 WARN L192 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 144 DAG size of output: 120 [2019-11-23 23:33:52,243 WARN L192 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 145 DAG size of output: 115 [2019-11-23 23:33:53,559 WARN L192 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 87 [2019-11-23 23:33:54,451 WARN L192 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 94 [2019-11-23 23:33:55,391 WARN L192 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 129 [2019-11-23 23:33:56,617 WARN L192 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 144 DAG size of output: 114 [2019-11-23 23:33:56,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:33:56,889 INFO L93 Difference]: Finished difference Result 1290 states and 1338 transitions. [2019-11-23 23:33:56,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 23:33:56,890 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 213 [2019-11-23 23:33:56,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:33:56,893 INFO L225 Difference]: With dead ends: 1290 [2019-11-23 23:33:56,893 INFO L226 Difference]: Without dead ends: 888 [2019-11-23 23:33:56,895 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 575 SyntacticMatches, 31 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 31.7s TimeCoverageRelationStatistics Valid=753, Invalid=2553, Unknown=0, NotChecked=0, Total=3306 [2019-11-23 23:33:56,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2019-11-23 23:33:56,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 783. [2019-11-23 23:33:56,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 783 states. [2019-11-23 23:33:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 812 transitions. [2019-11-23 23:33:56,912 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 812 transitions. Word has length 213 [2019-11-23 23:33:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:33:56,912 INFO L462 AbstractCegarLoop]: Abstraction has 783 states and 812 transitions. [2019-11-23 23:33:56,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 23:33:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 812 transitions. [2019-11-23 23:33:56,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-11-23 23:33:56,916 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:33:56,917 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:33:57,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:33:57,121 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:33:57,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:33:57,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1117200014, now seen corresponding path program 1 times [2019-11-23 23:33:57,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:33:57,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518127035] [2019-11-23 23:33:57,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:33:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 247 proven. 96 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 23:33:57,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518127035] [2019-11-23 23:33:57,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376344082] [2019-11-23 23:33:57,532 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 [2019-11-23 23:33:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:33:57,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 23:33:57,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:33:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 271 proven. 72 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 23:33:57,752 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:33:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 271 proven. 72 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 23:33:57,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567186525] [2019-11-23 23:33:57,898 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2019-11-23 23:33:57,898 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:33:57,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:33:57,899 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:33:57,899 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:34:00,930 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 32 [2019-11-23 23:34:01,081 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5133 conjuctions. This might take some time... [2019-11-23 23:34:01,240 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 32 [2019-11-23 23:34:01,412 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5133 conjuctions. This might take some time... [2019-11-23 23:34:01,579 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 32 [2019-11-23 23:34:01,732 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5133 conjuctions. This might take some time... [2019-11-23 23:34:03,261 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-23 23:34:04,509 WARN L192 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 132 DAG size of output: 113 [2019-11-23 23:34:05,735 WARN L192 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 134 DAG size of output: 117 [2019-11-23 23:34:06,811 WARN L192 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 131 DAG size of output: 110 [2019-11-23 23:34:07,194 WARN L192 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2019-11-23 23:34:07,350 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-11-23 23:34:07,696 WARN L192 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2019-11-23 23:34:08,039 WARN L192 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2019-11-23 23:34:08,396 WARN L192 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2019-11-23 23:34:08,716 WARN L192 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2019-11-23 23:34:09,160 WARN L192 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2019-11-23 23:34:09,507 WARN L192 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2019-11-23 23:34:09,919 WARN L192 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2019-11-23 23:34:10,259 WARN L192 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2019-11-23 23:34:10,593 WARN L192 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2019-11-23 23:34:10,943 WARN L192 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2019-11-23 23:34:11,332 WARN L192 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2019-11-23 23:34:11,689 WARN L192 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2019-11-23 23:34:12,054 WARN L192 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2019-11-23 23:34:12,400 WARN L192 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2019-11-23 23:34:12,876 WARN L192 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 88 [2019-11-23 23:34:13,234 WARN L192 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2019-11-23 23:34:13,638 WARN L192 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2019-11-23 23:34:14,029 WARN L192 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2019-11-23 23:34:15,315 WARN L192 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 112 DAG size of output: 96 [2019-11-23 23:34:16,477 WARN L192 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2019-11-23 23:34:16,852 WARN L192 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2019-11-23 23:34:17,226 WARN L192 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2019-11-23 23:34:17,798 WARN L192 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2019-11-23 23:34:18,249 WARN L192 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2019-11-23 23:34:18,693 WARN L192 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2019-11-23 23:34:18,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-23 23:34:18,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [9, 5, 5] total 41 [2019-11-23 23:34:18,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924129526] [2019-11-23 23:34:18,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 23:34:18,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:34:18,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 23:34:18,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 23:34:18,739 INFO L87 Difference]: Start difference. First operand 783 states and 812 transitions. Second operand 32 states. [2019-11-23 23:34:19,951 WARN L192 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 110 [2019-11-23 23:34:21,040 WARN L192 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 114 [2019-11-23 23:34:22,238 WARN L192 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 117 [2019-11-23 23:34:23,387 WARN L192 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 120 [2019-11-23 23:34:24,453 WARN L192 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 121 [2019-11-23 23:34:25,554 WARN L192 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 141 DAG size of output: 122 [2019-11-23 23:34:26,747 WARN L192 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 142 DAG size of output: 122