/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:32:44,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:32:44,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:32:44,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 22:32:44,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:32:44,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:32:44,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:32:44,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:32:44,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:32:44,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:32:44,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:32:44,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:32:44,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:32:44,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:32:44,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:32:44,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:32:44,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:32:44,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:32:44,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:32:44,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:32:44,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:32:44,432 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:32:44,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:32:44,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:32:44,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:32:44,434 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:32:44,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:32:44,435 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:32:44,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:32:44,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:32:44,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:32:44,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:32:44,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:32:44,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:32:44,436 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:32:44,436 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:32:44,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:32:44,437 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:32:44,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:32:44,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:32:44,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:32:44,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:32:44,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:32:44,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:32:44,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:32:44,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:32:44,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:32:44,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:32:44,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:32:44,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:32:44,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:32:44,720 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:32:44,734 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:32:44,737 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:32:44,739 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:32:44,739 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:32:44,740 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-11-23 22:32:44,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26e7961f8/48f1173cf4984d1eae2f1a5ca100fb91/FLAGd7fc83d9d [2019-11-23 22:32:45,295 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:32:45,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-11-23 22:32:45,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26e7961f8/48f1173cf4984d1eae2f1a5ca100fb91/FLAGd7fc83d9d [2019-11-23 22:32:45,622 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26e7961f8/48f1173cf4984d1eae2f1a5ca100fb91 [2019-11-23 22:32:45,632 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:32:45,634 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:32:45,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:32:45,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:32:45,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:32:45,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:32:45" (1/1) ... [2019-11-23 22:32:45,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54f37169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:45, skipping insertion in model container [2019-11-23 22:32:45,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:32:45" (1/1) ... [2019-11-23 22:32:45,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:32:45,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:32:45,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:32:45,967 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:32:46,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:32:46,111 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:32:46,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:46 WrapperNode [2019-11-23 22:32:46,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:32:46,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:32:46,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:32:46,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:32:46,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:46" (1/1) ... [2019-11-23 22:32:46,130 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:46" (1/1) ... [2019-11-23 22:32:46,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:32:46,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:32:46,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:32:46,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:32:46,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:46" (1/1) ... [2019-11-23 22:32:46,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:46" (1/1) ... [2019-11-23 22:32:46,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:46" (1/1) ... [2019-11-23 22:32:46,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:46" (1/1) ... [2019-11-23 22:32:46,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:46" (1/1) ... [2019-11-23 22:32:46,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:46" (1/1) ... [2019-11-23 22:32:46,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:46" (1/1) ... [2019-11-23 22:32:46,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:32:46,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:32:46,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:32:46,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:32:46,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:46" (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 22:32:46,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:32:46,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:32:46,849 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:32:46,849 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-23 22:32:46,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:32:46 BoogieIcfgContainer [2019-11-23 22:32:46,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:32:46,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:32:46,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:32:46,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:32:46,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:32:45" (1/3) ... [2019-11-23 22:32:46,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@308e6609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:32:46, skipping insertion in model container [2019-11-23 22:32:46,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:46" (2/3) ... [2019-11-23 22:32:46,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@308e6609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:32:46, skipping insertion in model container [2019-11-23 22:32:46,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:32:46" (3/3) ... [2019-11-23 22:32:46,860 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-11-23 22:32:46,870 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:32:46,878 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:32:46,890 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:32:46,917 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:32:46,918 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:32:46,918 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:32:46,918 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:32:46,919 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:32:46,919 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:32:46,919 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:32:46,919 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:32:46,939 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states. [2019-11-23 22:32:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 22:32:46,947 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:32:46,949 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:32:46,949 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:32:46,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:32:46,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1356231251, now seen corresponding path program 1 times [2019-11-23 22:32:46,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:32:46,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135809382] [2019-11-23 22:32:46,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:32:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:32:47,262 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 22:32:47,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135809382] [2019-11-23 22:32:47,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:32:47,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:32:47,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678610598] [2019-11-23 22:32:47,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:32:47,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:32:47,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:32:47,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:32:47,290 INFO L87 Difference]: Start difference. First operand 82 states. Second operand 3 states. [2019-11-23 22:32:47,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:32:47,363 INFO L93 Difference]: Finished difference Result 190 states and 300 transitions. [2019-11-23 22:32:47,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:32:47,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-23 22:32:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:32:47,379 INFO L225 Difference]: With dead ends: 190 [2019-11-23 22:32:47,379 INFO L226 Difference]: Without dead ends: 122 [2019-11-23 22:32:47,382 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 22:32:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-23 22:32:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2019-11-23 22:32:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-23 22:32:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 178 transitions. [2019-11-23 22:32:47,434 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 178 transitions. Word has length 37 [2019-11-23 22:32:47,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:32:47,434 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 178 transitions. [2019-11-23 22:32:47,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:32:47,435 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 178 transitions. [2019-11-23 22:32:47,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 22:32:47,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:32:47,436 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] [2019-11-23 22:32:47,437 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:32:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:32:47,437 INFO L82 PathProgramCache]: Analyzing trace with hash -775084619, now seen corresponding path program 1 times [2019-11-23 22:32:47,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:32:47,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957460311] [2019-11-23 22:32:47,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:32:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:32:47,572 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 22:32:47,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957460311] [2019-11-23 22:32:47,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:32:47,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:32:47,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137734661] [2019-11-23 22:32:47,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:32:47,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:32:47,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:32:47,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:32:47,580 INFO L87 Difference]: Start difference. First operand 120 states and 178 transitions. Second operand 3 states. [2019-11-23 22:32:47,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:32:47,638 INFO L93 Difference]: Finished difference Result 288 states and 442 transitions. [2019-11-23 22:32:47,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:32:47,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2019-11-23 22:32:47,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:32:47,642 INFO L225 Difference]: With dead ends: 288 [2019-11-23 22:32:47,642 INFO L226 Difference]: Without dead ends: 188 [2019-11-23 22:32:47,644 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 22:32:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-11-23 22:32:47,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2019-11-23 22:32:47,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-23 22:32:47,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 281 transitions. [2019-11-23 22:32:47,671 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 281 transitions. Word has length 38 [2019-11-23 22:32:47,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:32:47,672 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 281 transitions. [2019-11-23 22:32:47,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:32:47,672 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 281 transitions. [2019-11-23 22:32:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 22:32:47,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:32:47,674 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:32:47,674 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:32:47,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:32:47,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1501816372, now seen corresponding path program 1 times [2019-11-23 22:32:47,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:32:47,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162844544] [2019-11-23 22:32:47,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:32:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:32:47,867 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 22:32:47,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162844544] [2019-11-23 22:32:47,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:32:47,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 22:32:47,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86903224] [2019-11-23 22:32:47,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:32:47,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:32:47,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:32:47,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:32:47,870 INFO L87 Difference]: Start difference. First operand 186 states and 281 transitions. Second operand 5 states. [2019-11-23 22:32:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:32:48,030 INFO L93 Difference]: Finished difference Result 628 states and 972 transitions. [2019-11-23 22:32:48,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:32:48,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-11-23 22:32:48,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:32:48,038 INFO L225 Difference]: With dead ends: 628 [2019-11-23 22:32:48,038 INFO L226 Difference]: Without dead ends: 462 [2019-11-23 22:32:48,040 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:32:48,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2019-11-23 22:32:48,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 458. [2019-11-23 22:32:48,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2019-11-23 22:32:48,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 705 transitions. [2019-11-23 22:32:48,095 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 705 transitions. Word has length 39 [2019-11-23 22:32:48,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:32:48,096 INFO L462 AbstractCegarLoop]: Abstraction has 458 states and 705 transitions. [2019-11-23 22:32:48,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:32:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 705 transitions. [2019-11-23 22:32:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:32:48,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:32:48,098 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] [2019-11-23 22:32:48,098 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:32:48,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:32:48,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1560757853, now seen corresponding path program 1 times [2019-11-23 22:32:48,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:32:48,099 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755087471] [2019-11-23 22:32:48,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:32:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:32:48,216 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 22:32:48,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755087471] [2019-11-23 22:32:48,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:32:48,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:32:48,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843428072] [2019-11-23 22:32:48,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:32:48,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:32:48,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:32:48,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:32:48,219 INFO L87 Difference]: Start difference. First operand 458 states and 705 transitions. Second operand 5 states. [2019-11-23 22:32:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:32:48,430 INFO L93 Difference]: Finished difference Result 1334 states and 2075 transitions. [2019-11-23 22:32:48,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:32:48,431 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2019-11-23 22:32:48,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:32:48,437 INFO L225 Difference]: With dead ends: 1334 [2019-11-23 22:32:48,437 INFO L226 Difference]: Without dead ends: 896 [2019-11-23 22:32:48,439 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:32:48,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2019-11-23 22:32:48,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 894. [2019-11-23 22:32:48,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2019-11-23 22:32:48,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1381 transitions. [2019-11-23 22:32:48,508 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1381 transitions. Word has length 41 [2019-11-23 22:32:48,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:32:48,509 INFO L462 AbstractCegarLoop]: Abstraction has 894 states and 1381 transitions. [2019-11-23 22:32:48,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:32:48,509 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1381 transitions. [2019-11-23 22:32:48,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:32:48,511 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:32:48,511 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] [2019-11-23 22:32:48,511 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:32:48,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:32:48,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1890309442, now seen corresponding path program 1 times [2019-11-23 22:32:48,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:32:48,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120755926] [2019-11-23 22:32:48,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:32:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:32:48,594 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 22:32:48,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120755926] [2019-11-23 22:32:48,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:32:48,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 22:32:48,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444833720] [2019-11-23 22:32:48,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:32:48,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:32:48,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:32:48,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:32:48,597 INFO L87 Difference]: Start difference. First operand 894 states and 1381 transitions. Second operand 5 states. [2019-11-23 22:32:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:32:48,831 INFO L93 Difference]: Finished difference Result 3546 states and 5503 transitions. [2019-11-23 22:32:48,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:32:48,832 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2019-11-23 22:32:48,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:32:48,849 INFO L225 Difference]: With dead ends: 3546 [2019-11-23 22:32:48,849 INFO L226 Difference]: Without dead ends: 2672 [2019-11-23 22:32:48,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:32:48,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2019-11-23 22:32:48,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 1766. [2019-11-23 22:32:48,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1766 states. [2019-11-23 22:32:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2693 transitions. [2019-11-23 22:32:48,996 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2693 transitions. Word has length 41 [2019-11-23 22:32:48,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:32:48,997 INFO L462 AbstractCegarLoop]: Abstraction has 1766 states and 2693 transitions. [2019-11-23 22:32:48,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:32:48,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2693 transitions. [2019-11-23 22:32:49,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 22:32:49,003 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:32:49,003 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:32:49,004 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:32:49,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:32:49,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1549405756, now seen corresponding path program 1 times [2019-11-23 22:32:49,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:32:49,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351346232] [2019-11-23 22:32:49,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:32:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:32:49,109 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 22:32:49,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351346232] [2019-11-23 22:32:49,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:32:49,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 22:32:49,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768353425] [2019-11-23 22:32:49,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:32:49,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:32:49,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:32:49,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:32:49,112 INFO L87 Difference]: Start difference. First operand 1766 states and 2693 transitions. Second operand 5 states. [2019-11-23 22:32:49,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:32:49,392 INFO L93 Difference]: Finished difference Result 3608 states and 5462 transitions. [2019-11-23 22:32:49,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:32:49,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-11-23 22:32:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:32:49,416 INFO L225 Difference]: With dead ends: 3608 [2019-11-23 22:32:49,417 INFO L226 Difference]: Without dead ends: 3606 [2019-11-23 22:32:49,419 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:32:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2019-11-23 22:32:49,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 1862. [2019-11-23 22:32:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1862 states. [2019-11-23 22:32:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2789 transitions. [2019-11-23 22:32:49,597 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2789 transitions. Word has length 42 [2019-11-23 22:32:49,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:32:49,600 INFO L462 AbstractCegarLoop]: Abstraction has 1862 states and 2789 transitions. [2019-11-23 22:32:49,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:32:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2789 transitions. [2019-11-23 22:32:49,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 22:32:49,606 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:32:49,607 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] [2019-11-23 22:32:49,607 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:32:49,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:32:49,607 INFO L82 PathProgramCache]: Analyzing trace with hash -776365166, now seen corresponding path program 1 times [2019-11-23 22:32:49,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:32:49,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520580289] [2019-11-23 22:32:49,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:32:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:32:49,686 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 22:32:49,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520580289] [2019-11-23 22:32:49,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:32:49,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:32:49,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413410282] [2019-11-23 22:32:49,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:32:49,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:32:49,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:32:49,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:32:49,688 INFO L87 Difference]: Start difference. First operand 1862 states and 2789 transitions. Second operand 3 states. [2019-11-23 22:32:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:32:49,959 INFO L93 Difference]: Finished difference Result 4962 states and 7385 transitions. [2019-11-23 22:32:49,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:32:49,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-11-23 22:32:49,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:32:49,981 INFO L225 Difference]: With dead ends: 4962 [2019-11-23 22:32:49,982 INFO L226 Difference]: Without dead ends: 3120 [2019-11-23 22:32:49,985 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 22:32:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2019-11-23 22:32:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 3078. [2019-11-23 22:32:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3078 states. [2019-11-23 22:32:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 4495 transitions. [2019-11-23 22:32:50,270 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 4495 transitions. Word has length 43 [2019-11-23 22:32:50,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:32:50,271 INFO L462 AbstractCegarLoop]: Abstraction has 3078 states and 4495 transitions. [2019-11-23 22:32:50,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:32:50,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 4495 transitions. [2019-11-23 22:32:50,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 22:32:50,273 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:32:50,273 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] [2019-11-23 22:32:50,273 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:32:50,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:32:50,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1884301642, now seen corresponding path program 1 times [2019-11-23 22:32:50,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:32:50,276 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116688151] [2019-11-23 22:32:50,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:32:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:32:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:32:50,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116688151] [2019-11-23 22:32:50,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:32:50,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:32:50,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090202835] [2019-11-23 22:32:50,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:32:50,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:32:50,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:32:50,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:32:50,320 INFO L87 Difference]: Start difference. First operand 3078 states and 4495 transitions. Second operand 3 states. [2019-11-23 22:32:50,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:32:50,675 INFO L93 Difference]: Finished difference Result 6141 states and 9029 transitions. [2019-11-23 22:32:50,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:32:50,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-11-23 22:32:50,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:32:50,698 INFO L225 Difference]: With dead ends: 6141 [2019-11-23 22:32:50,698 INFO L226 Difference]: Without dead ends: 4298 [2019-11-23 22:32:50,702 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 22:32:50,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2019-11-23 22:32:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 4296. [2019-11-23 22:32:51,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4296 states. [2019-11-23 22:32:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 6209 transitions. [2019-11-23 22:32:51,062 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 6209 transitions. Word has length 43 [2019-11-23 22:32:51,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:32:51,065 INFO L462 AbstractCegarLoop]: Abstraction has 4296 states and 6209 transitions. [2019-11-23 22:32:51,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:32:51,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 6209 transitions. [2019-11-23 22:32:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 22:32:51,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:32:51,068 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] [2019-11-23 22:32:51,069 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:32:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:32:51,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1507478329, now seen corresponding path program 1 times [2019-11-23 22:32:51,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:32:51,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314075802] [2019-11-23 22:32:51,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:32:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:32:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:32:51,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314075802] [2019-11-23 22:32:51,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984791070] [2019-11-23 22:32:51,197 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 22:32:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:32:51,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:32:51,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:32:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:32:51,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:32:51,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-23 22:32:51,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988755049] [2019-11-23 22:32:51,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:32:51,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:32:51,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:32:51,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:32:51,418 INFO L87 Difference]: Start difference. First operand 4296 states and 6209 transitions. Second operand 11 states. [2019-11-23 22:32:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:32:52,919 INFO L93 Difference]: Finished difference Result 14189 states and 20409 transitions. [2019-11-23 22:32:52,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:32:52,920 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 22:32:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:32:52,995 INFO L225 Difference]: With dead ends: 14189 [2019-11-23 22:32:52,996 INFO L226 Difference]: Without dead ends: 11477 [2019-11-23 22:32:53,002 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:32:53,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11477 states. [2019-11-23 22:32:53,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11477 to 6064. [2019-11-23 22:32:53,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6064 states. [2019-11-23 22:32:53,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6064 states to 6064 states and 8729 transitions. [2019-11-23 22:32:53,782 INFO L78 Accepts]: Start accepts. Automaton has 6064 states and 8729 transitions. Word has length 61 [2019-11-23 22:32:53,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:32:53,783 INFO L462 AbstractCegarLoop]: Abstraction has 6064 states and 8729 transitions. [2019-11-23 22:32:53,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:32:53,783 INFO L276 IsEmpty]: Start isEmpty. Operand 6064 states and 8729 transitions. [2019-11-23 22:32:53,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 22:32:53,786 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:32:53,786 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] [2019-11-23 22:32:53,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:32:53,989 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:32:53,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:32:53,991 INFO L82 PathProgramCache]: Analyzing trace with hash 910806190, now seen corresponding path program 1 times [2019-11-23 22:32:53,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:32:53,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085263179] [2019-11-23 22:32:53,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:32:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:32:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:32:54,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085263179] [2019-11-23 22:32:54,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:32:54,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:32:54,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662394799] [2019-11-23 22:32:54,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:32:54,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:32:54,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:32:54,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:32:54,078 INFO L87 Difference]: Start difference. First operand 6064 states and 8729 transitions. Second operand 3 states. [2019-11-23 22:32:54,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:32:54,784 INFO L93 Difference]: Finished difference Result 9842 states and 14091 transitions. [2019-11-23 22:32:54,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:32:54,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2019-11-23 22:32:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:32:54,806 INFO L225 Difference]: With dead ends: 9842 [2019-11-23 22:32:54,806 INFO L226 Difference]: Without dead ends: 6405 [2019-11-23 22:32:54,811 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 22:32:54,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6405 states. [2019-11-23 22:32:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6405 to 6151. [2019-11-23 22:32:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6151 states. [2019-11-23 22:32:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6151 states to 6151 states and 8685 transitions. [2019-11-23 22:32:55,426 INFO L78 Accepts]: Start accepts. Automaton has 6151 states and 8685 transitions. Word has length 61 [2019-11-23 22:32:55,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:32:55,426 INFO L462 AbstractCegarLoop]: Abstraction has 6151 states and 8685 transitions. [2019-11-23 22:32:55,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:32:55,426 INFO L276 IsEmpty]: Start isEmpty. Operand 6151 states and 8685 transitions. [2019-11-23 22:32:55,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 22:32:55,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:32:55,429 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] [2019-11-23 22:32:55,430 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:32:55,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:32:55,430 INFO L82 PathProgramCache]: Analyzing trace with hash -632426569, now seen corresponding path program 1 times [2019-11-23 22:32:55,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:32:55,431 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669125096] [2019-11-23 22:32:55,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:32:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:32:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:32:55,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669125096] [2019-11-23 22:32:55,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708430951] [2019-11-23 22:32:55,559 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 22:32:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:32:55,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:32:55,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:32:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:32:55,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:32:55,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2019-11-23 22:32:55,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377408589] [2019-11-23 22:32:55,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:32:55,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:32:55,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:32:55,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:32:55,709 INFO L87 Difference]: Start difference. First operand 6151 states and 8685 transitions. Second operand 5 states. [2019-11-23 22:32:56,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:32:56,779 INFO L93 Difference]: Finished difference Result 15837 states and 22343 transitions. [2019-11-23 22:32:56,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:32:56,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-11-23 22:32:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:32:56,801 INFO L225 Difference]: With dead ends: 15837 [2019-11-23 22:32:56,801 INFO L226 Difference]: Without dead ends: 9746 [2019-11-23 22:32:56,812 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:32:56,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9746 states. [2019-11-23 22:32:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9746 to 9643. [2019-11-23 22:32:57,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9643 states. [2019-11-23 22:32:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9643 states to 9643 states and 13531 transitions. [2019-11-23 22:32:57,636 INFO L78 Accepts]: Start accepts. Automaton has 9643 states and 13531 transitions. Word has length 61 [2019-11-23 22:32:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:32:57,636 INFO L462 AbstractCegarLoop]: Abstraction has 9643 states and 13531 transitions. [2019-11-23 22:32:57,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:32:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 9643 states and 13531 transitions. [2019-11-23 22:32:57,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 22:32:57,640 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:32:57,641 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] [2019-11-23 22:32:57,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:32:57,851 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:32:57,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:32:57,852 INFO L82 PathProgramCache]: Analyzing trace with hash 985078322, now seen corresponding path program 1 times [2019-11-23 22:32:57,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:32:57,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50451137] [2019-11-23 22:32:57,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:32:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:32:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:32:57,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50451137] [2019-11-23 22:32:57,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134170012] [2019-11-23 22:32:57,951 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 22:32:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:32:58,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:32:58,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:32:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:32:58,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:32:58,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-23 22:32:58,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146117393] [2019-11-23 22:32:58,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:32:58,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:32:58,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:32:58,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:32:58,132 INFO L87 Difference]: Start difference. First operand 9643 states and 13531 transitions. Second operand 11 states. [2019-11-23 22:32:59,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:32:59,728 INFO L93 Difference]: Finished difference Result 20707 states and 28904 transitions. [2019-11-23 22:32:59,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:32:59,728 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 22:32:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:32:59,763 INFO L225 Difference]: With dead ends: 20707 [2019-11-23 22:32:59,764 INFO L226 Difference]: Without dead ends: 18209 [2019-11-23 22:32:59,772 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:32:59,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18209 states. [2019-11-23 22:33:00,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18209 to 10489. [2019-11-23 22:33:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10489 states. [2019-11-23 22:33:00,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10489 states to 10489 states and 14702 transitions. [2019-11-23 22:33:00,403 INFO L78 Accepts]: Start accepts. Automaton has 10489 states and 14702 transitions. Word has length 61 [2019-11-23 22:33:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:33:00,404 INFO L462 AbstractCegarLoop]: Abstraction has 10489 states and 14702 transitions. [2019-11-23 22:33:00,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:33:00,404 INFO L276 IsEmpty]: Start isEmpty. Operand 10489 states and 14702 transitions. [2019-11-23 22:33:00,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 22:33:00,408 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:33:00,408 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 22:33:00,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:33:00,613 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:33:00,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:33:00,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1047697334, now seen corresponding path program 1 times [2019-11-23 22:33:00,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:33:00,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902248929] [2019-11-23 22:33:00,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:33:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:33:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:33:00,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902248929] [2019-11-23 22:33:00,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:33:00,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:33:00,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973266131] [2019-11-23 22:33:00,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:33:00,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:33:00,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:33:00,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:33:00,657 INFO L87 Difference]: Start difference. First operand 10489 states and 14702 transitions. Second operand 3 states. [2019-11-23 22:33:01,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:33:01,624 INFO L93 Difference]: Finished difference Result 18777 states and 26225 transitions. [2019-11-23 22:33:01,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:33:01,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2019-11-23 22:33:01,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:33:01,647 INFO L225 Difference]: With dead ends: 18777 [2019-11-23 22:33:01,648 INFO L226 Difference]: Without dead ends: 10892 [2019-11-23 22:33:01,659 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 22:33:01,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10892 states. [2019-11-23 22:33:02,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10892 to 10873. [2019-11-23 22:33:02,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10873 states. [2019-11-23 22:33:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10873 states to 10873 states and 14928 transitions. [2019-11-23 22:33:02,425 INFO L78 Accepts]: Start accepts. Automaton has 10873 states and 14928 transitions. Word has length 62 [2019-11-23 22:33:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:33:02,425 INFO L462 AbstractCegarLoop]: Abstraction has 10873 states and 14928 transitions. [2019-11-23 22:33:02,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:33:02,426 INFO L276 IsEmpty]: Start isEmpty. Operand 10873 states and 14928 transitions. [2019-11-23 22:33:02,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 22:33:02,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:33:02,429 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 22:33:02,430 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:33:02,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:33:02,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1466148538, now seen corresponding path program 1 times [2019-11-23 22:33:02,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:33:02,430 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292820878] [2019-11-23 22:33:02,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:33:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:33:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:33:02,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292820878] [2019-11-23 22:33:02,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798867303] [2019-11-23 22:33:02,622 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 22:33:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:33:02,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:33:02,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:33:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:33:02,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:33:02,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2019-11-23 22:33:02,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979353015] [2019-11-23 22:33:02,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:33:02,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:33:02,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:33:02,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:33:02,785 INFO L87 Difference]: Start difference. First operand 10873 states and 14928 transitions. Second operand 12 states. [2019-11-23 22:33:12,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:33:12,580 INFO L93 Difference]: Finished difference Result 61600 states and 83472 transitions. [2019-11-23 22:33:12,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-11-23 22:33:12,580 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2019-11-23 22:33:12,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:33:12,653 INFO L225 Difference]: With dead ends: 61600 [2019-11-23 22:33:12,654 INFO L226 Difference]: Without dead ends: 51575 [2019-11-23 22:33:12,675 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3357 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1514, Invalid=7042, Unknown=0, NotChecked=0, Total=8556 [2019-11-23 22:33:12,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51575 states. [2019-11-23 22:33:15,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51575 to 25565. [2019-11-23 22:33:15,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25565 states. [2019-11-23 22:33:15,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25565 states to 25565 states and 34527 transitions. [2019-11-23 22:33:15,833 INFO L78 Accepts]: Start accepts. Automaton has 25565 states and 34527 transitions. Word has length 62 [2019-11-23 22:33:15,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:33:15,833 INFO L462 AbstractCegarLoop]: Abstraction has 25565 states and 34527 transitions. [2019-11-23 22:33:15,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:33:15,833 INFO L276 IsEmpty]: Start isEmpty. Operand 25565 states and 34527 transitions. [2019-11-23 22:33:15,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:33:15,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:33:15,839 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] [2019-11-23 22:33:16,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:33:16,040 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:33:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:33:16,041 INFO L82 PathProgramCache]: Analyzing trace with hash -949474624, now seen corresponding path program 1 times [2019-11-23 22:33:16,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:33:16,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528603483] [2019-11-23 22:33:16,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:33:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:33:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:33:16,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528603483] [2019-11-23 22:33:16,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:33:16,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 22:33:16,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63238514] [2019-11-23 22:33:16,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:33:16,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:33:16,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:33:16,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:33:16,111 INFO L87 Difference]: Start difference. First operand 25565 states and 34527 transitions. Second operand 5 states. [2019-11-23 22:33:18,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:33:18,608 INFO L93 Difference]: Finished difference Result 39919 states and 54309 transitions. [2019-11-23 22:33:18,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:33:18,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-11-23 22:33:18,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:33:18,643 INFO L225 Difference]: With dead ends: 39919 [2019-11-23 22:33:18,643 INFO L226 Difference]: Without dead ends: 34681 [2019-11-23 22:33:18,657 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:33:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34681 states. [2019-11-23 22:33:20,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34681 to 28617. [2019-11-23 22:33:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28617 states. [2019-11-23 22:33:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28617 states to 28617 states and 38623 transitions. [2019-11-23 22:33:20,857 INFO L78 Accepts]: Start accepts. Automaton has 28617 states and 38623 transitions. Word has length 63 [2019-11-23 22:33:20,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:33:20,857 INFO L462 AbstractCegarLoop]: Abstraction has 28617 states and 38623 transitions. [2019-11-23 22:33:20,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:33:20,857 INFO L276 IsEmpty]: Start isEmpty. Operand 28617 states and 38623 transitions. [2019-11-23 22:33:20,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:33:20,862 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:33:20,862 INFO L410 BasicCegarLoop]: trace histogram [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 22:33:20,863 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:33:20,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:33:20,863 INFO L82 PathProgramCache]: Analyzing trace with hash 885685064, now seen corresponding path program 1 times [2019-11-23 22:33:20,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:33:20,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220600344] [2019-11-23 22:33:20,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:33:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:33:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:33:20,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220600344] [2019-11-23 22:33:20,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:33:20,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:33:20,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541428772] [2019-11-23 22:33:20,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:33:20,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:33:20,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:33:20,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:33:20,899 INFO L87 Difference]: Start difference. First operand 28617 states and 38623 transitions. Second operand 3 states. [2019-11-23 22:33:23,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:33:23,026 INFO L93 Difference]: Finished difference Result 44191 states and 59690 transitions. [2019-11-23 22:33:23,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:33:23,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2019-11-23 22:33:23,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:33:23,053 INFO L225 Difference]: With dead ends: 44191 [2019-11-23 22:33:23,053 INFO L226 Difference]: Without dead ends: 27946 [2019-11-23 22:33:23,069 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 22:33:23,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27946 states. [2019-11-23 22:33:25,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27946 to 27927. [2019-11-23 22:33:25,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27927 states. [2019-11-23 22:33:25,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27927 states to 27927 states and 37465 transitions. [2019-11-23 22:33:25,824 INFO L78 Accepts]: Start accepts. Automaton has 27927 states and 37465 transitions. Word has length 63 [2019-11-23 22:33:25,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:33:25,824 INFO L462 AbstractCegarLoop]: Abstraction has 27927 states and 37465 transitions. [2019-11-23 22:33:25,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:33:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 27927 states and 37465 transitions. [2019-11-23 22:33:25,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 22:33:25,829 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:33:25,829 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 22:33:25,829 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:33:25,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:33:25,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1327129075, now seen corresponding path program 1 times [2019-11-23 22:33:25,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:33:25,830 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022003731] [2019-11-23 22:33:25,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:33:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:33:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:33:25,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022003731] [2019-11-23 22:33:25,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46289957] [2019-11-23 22:33:25,936 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 22:33:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:33:26,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:33:26,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:33:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:33:26,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:33:26,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2019-11-23 22:33:26,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855433924] [2019-11-23 22:33:26,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:33:26,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:33:26,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:33:26,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:33:26,044 INFO L87 Difference]: Start difference. First operand 27927 states and 37465 transitions. Second operand 5 states. [2019-11-23 22:33:28,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:33:28,360 INFO L93 Difference]: Finished difference Result 54729 states and 73508 transitions. [2019-11-23 22:33:28,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:33:28,360 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2019-11-23 22:33:28,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:33:28,393 INFO L225 Difference]: With dead ends: 54729 [2019-11-23 22:33:28,393 INFO L226 Difference]: Without dead ends: 32144 [2019-11-23 22:33:28,414 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:33:28,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32144 states. [2019-11-23 22:33:30,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32144 to 27927. [2019-11-23 22:33:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27927 states. [2019-11-23 22:33:30,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27927 states to 27927 states and 36966 transitions. [2019-11-23 22:33:30,611 INFO L78 Accepts]: Start accepts. Automaton has 27927 states and 36966 transitions. Word has length 64 [2019-11-23 22:33:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:33:30,611 INFO L462 AbstractCegarLoop]: Abstraction has 27927 states and 36966 transitions. [2019-11-23 22:33:30,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:33:30,611 INFO L276 IsEmpty]: Start isEmpty. Operand 27927 states and 36966 transitions. [2019-11-23 22:33:30,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 22:33:30,615 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:33:30,615 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 22:33:30,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:33:30,819 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:33:30,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:33:30,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1913170926, now seen corresponding path program 1 times [2019-11-23 22:33:30,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:33:30,821 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070044171] [2019-11-23 22:33:30,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:33:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:33:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:33:30,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070044171] [2019-11-23 22:33:30,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80333204] [2019-11-23 22:33:30,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:33:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:33:30,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:33:30,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:33:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:33:31,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:33:31,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-23 22:33:31,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661709513] [2019-11-23 22:33:31,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:33:31,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:33:31,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:33:31,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:33:31,028 INFO L87 Difference]: Start difference. First operand 27927 states and 36966 transitions. Second operand 11 states. [2019-11-23 22:33:34,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:33:34,531 INFO L93 Difference]: Finished difference Result 57652 states and 76087 transitions. [2019-11-23 22:33:34,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:33:34,532 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2019-11-23 22:33:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:33:34,570 INFO L225 Difference]: With dead ends: 57652 [2019-11-23 22:33:34,571 INFO L226 Difference]: Without dead ends: 40668 [2019-11-23 22:33:34,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:33:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40668 states. [2019-11-23 22:33:37,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40668 to 28707. [2019-11-23 22:33:37,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28707 states. [2019-11-23 22:33:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28707 states to 28707 states and 37730 transitions. [2019-11-23 22:33:37,886 INFO L78 Accepts]: Start accepts. Automaton has 28707 states and 37730 transitions. Word has length 64 [2019-11-23 22:33:37,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:33:37,886 INFO L462 AbstractCegarLoop]: Abstraction has 28707 states and 37730 transitions. [2019-11-23 22:33:37,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:33:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 28707 states and 37730 transitions. [2019-11-23 22:33:37,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 22:33:37,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:33:37,889 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 22:33:38,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:33:38,091 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:33:38,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:33:38,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1430287189, now seen corresponding path program 1 times [2019-11-23 22:33:38,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:33:38,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787371877] [2019-11-23 22:33:38,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:33:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:33:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:33:38,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787371877] [2019-11-23 22:33:38,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:33:38,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:33:38,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105489910] [2019-11-23 22:33:38,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:33:38,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:33:38,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:33:38,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:33:38,158 INFO L87 Difference]: Start difference. First operand 28707 states and 37730 transitions. Second operand 3 states. [2019-11-23 22:33:40,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:33:40,977 INFO L93 Difference]: Finished difference Result 52741 states and 69272 transitions. [2019-11-23 22:33:40,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:33:40,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2019-11-23 22:33:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:33:41,006 INFO L225 Difference]: With dead ends: 52741 [2019-11-23 22:33:41,006 INFO L226 Difference]: Without dead ends: 30248 [2019-11-23 22:33:41,027 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 22:33:41,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30248 states. [2019-11-23 22:33:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30248 to 27445. [2019-11-23 22:33:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27445 states. [2019-11-23 22:33:43,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27445 states to 27445 states and 35491 transitions. [2019-11-23 22:33:43,477 INFO L78 Accepts]: Start accepts. Automaton has 27445 states and 35491 transitions. Word has length 64 [2019-11-23 22:33:43,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:33:43,477 INFO L462 AbstractCegarLoop]: Abstraction has 27445 states and 35491 transitions. [2019-11-23 22:33:43,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:33:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 27445 states and 35491 transitions. [2019-11-23 22:33:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-23 22:33:43,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:33:43,482 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 22:33:43,482 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:33:43,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:33:43,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1976489216, now seen corresponding path program 1 times [2019-11-23 22:33:43,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:33:43,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426405856] [2019-11-23 22:33:43,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:33:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:33:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:33:43,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426405856] [2019-11-23 22:33:43,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:33:43,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 22:33:43,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513379437] [2019-11-23 22:33:43,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:33:43,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:33:43,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:33:43,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:33:43,534 INFO L87 Difference]: Start difference. First operand 27445 states and 35491 transitions. Second operand 5 states. [2019-11-23 22:33:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:33:46,576 INFO L93 Difference]: Finished difference Result 41166 states and 53827 transitions. [2019-11-23 22:33:46,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:33:46,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2019-11-23 22:33:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:33:46,607 INFO L225 Difference]: With dead ends: 41166 [2019-11-23 22:33:46,607 INFO L226 Difference]: Without dead ends: 35044 [2019-11-23 22:33:46,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:33:46,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35044 states. [2019-11-23 22:33:50,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35044 to 32411. [2019-11-23 22:33:50,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32411 states. [2019-11-23 22:33:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32411 states to 32411 states and 41861 transitions. [2019-11-23 22:33:50,301 INFO L78 Accepts]: Start accepts. Automaton has 32411 states and 41861 transitions. Word has length 66 [2019-11-23 22:33:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:33:50,301 INFO L462 AbstractCegarLoop]: Abstraction has 32411 states and 41861 transitions. [2019-11-23 22:33:50,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:33:50,301 INFO L276 IsEmpty]: Start isEmpty. Operand 32411 states and 41861 transitions. [2019-11-23 22:33:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 22:33:50,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:33:50,305 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:33:50,305 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:33:50,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:33:50,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1654285386, now seen corresponding path program 1 times [2019-11-23 22:33:50,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:33:50,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503920836] [2019-11-23 22:33:50,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:33:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:33:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:33:50,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503920836] [2019-11-23 22:33:50,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:33:50,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 22:33:50,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305646913] [2019-11-23 22:33:50,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:33:50,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:33:50,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:33:50,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:33:50,374 INFO L87 Difference]: Start difference. First operand 32411 states and 41861 transitions. Second operand 5 states. [2019-11-23 22:33:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:33:53,826 INFO L93 Difference]: Finished difference Result 47797 states and 62335 transitions. [2019-11-23 22:33:53,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:33:53,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2019-11-23 22:33:53,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:33:53,863 INFO L225 Difference]: With dead ends: 47797 [2019-11-23 22:33:53,864 INFO L226 Difference]: Without dead ends: 40857 [2019-11-23 22:33:53,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:33:53,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40857 states. [2019-11-23 22:33:57,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40857 to 38211. [2019-11-23 22:33:57,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38211 states. [2019-11-23 22:33:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38211 states to 38211 states and 49347 transitions. [2019-11-23 22:33:57,253 INFO L78 Accepts]: Start accepts. Automaton has 38211 states and 49347 transitions. Word has length 67 [2019-11-23 22:33:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:33:57,253 INFO L462 AbstractCegarLoop]: Abstraction has 38211 states and 49347 transitions. [2019-11-23 22:33:57,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:33:57,254 INFO L276 IsEmpty]: Start isEmpty. Operand 38211 states and 49347 transitions. [2019-11-23 22:33:57,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 22:33:57,259 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:33:57,259 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 22:33:57,259 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:33:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:33:57,260 INFO L82 PathProgramCache]: Analyzing trace with hash -223457712, now seen corresponding path program 1 times [2019-11-23 22:33:57,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:33:57,260 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839813305] [2019-11-23 22:33:57,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:33:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:33:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:33:57,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839813305] [2019-11-23 22:33:57,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205741326] [2019-11-23 22:33:57,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:33:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:33:57,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:33:57,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:33:57,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:33:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:33:57,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:33:57,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-23 22:33:57,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367600125] [2019-11-23 22:33:57,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:33:57,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:33:57,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:33:57,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:33:57,768 INFO L87 Difference]: Start difference. First operand 38211 states and 49347 transitions. Second operand 17 states.