/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:14:08,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:14:08,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:14:08,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:14:08,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:14:08,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:14:08,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:14:08,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:14:08,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:14:08,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:14:08,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:14:08,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:14:08,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:14:08,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:14:08,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:14:08,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:14:08,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:14:08,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:14:08,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:14:08,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:14:08,271 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 [2019-11-06 19:14:08,285 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:14:08,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:14:08,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:14:08,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:14:08,287 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:14:08,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:14:08,287 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:14:08,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:14:08,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:14:08,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:14:08,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:14:08,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:14:08,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:14:08,289 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:14:08,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:14:08,289 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:14:08,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:14:08,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:14:08,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:14:08,290 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:14:08,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:14:08,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:14:08,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:14:08,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:14:08,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:14:08,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:14:08,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:14:08,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:14:08,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:14:08,585 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:14:08,599 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:14:08,603 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:14:08,604 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:14:08,605 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:14:08,605 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label37.c [2019-11-06 19:14:08,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b7b5038b/ab8b20462e214237bba088608b3bfce8/FLAGc5bc7620a [2019-11-06 19:14:09,274 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:14:09,277 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label37.c [2019-11-06 19:14:09,295 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b7b5038b/ab8b20462e214237bba088608b3bfce8/FLAGc5bc7620a [2019-11-06 19:14:09,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b7b5038b/ab8b20462e214237bba088608b3bfce8 [2019-11-06 19:14:09,568 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:14:09,570 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:14:09,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:09,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:14:09,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:14:09,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:09" (1/1) ... [2019-11-06 19:14:09,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45e69e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:09, skipping insertion in model container [2019-11-06 19:14:09,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:09" (1/1) ... [2019-11-06 19:14:09,585 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:14:09,630 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:14:10,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:10,209 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:14:10,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:10,479 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:14:10,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:10 WrapperNode [2019-11-06 19:14:10,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:10,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:14:10,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:14:10,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:14:10,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:10" (1/1) ... [2019-11-06 19:14:10,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:10" (1/1) ... [2019-11-06 19:14:10,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:10" (1/1) ... [2019-11-06 19:14:10,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:10" (1/1) ... [2019-11-06 19:14:10,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:10" (1/1) ... [2019-11-06 19:14:10,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:10" (1/1) ... [2019-11-06 19:14:10,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:10" (1/1) ... [2019-11-06 19:14:10,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:14:10,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:14:10,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:14:10,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:14:10,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:10" (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 [2019-11-06 19:14:10,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:14:10,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:14:10,802 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:14:10,803 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:14:10,803 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:14:10,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:14:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:14:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:14:10,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:14:10,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:14:10,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:14:12,442 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:14:12,444 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:14:12,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:14:12 BoogieIcfgContainer [2019-11-06 19:14:12,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:14:12,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:14:12,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:14:12,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:14:12,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:14:09" (1/3) ... [2019-11-06 19:14:12,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142766c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:14:12, skipping insertion in model container [2019-11-06 19:14:12,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:10" (2/3) ... [2019-11-06 19:14:12,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142766c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:14:12, skipping insertion in model container [2019-11-06 19:14:12,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:14:12" (3/3) ... [2019-11-06 19:14:12,455 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label37.c [2019-11-06 19:14:12,465 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:14:12,474 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:14:12,487 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:14:12,517 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:14:12,517 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:14:12,518 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:14:12,518 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:14:12,518 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:14:12,518 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:14:12,518 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:14:12,519 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:14:12,543 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:14:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 19:14:12,551 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:12,552 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] [2019-11-06 19:14:12,554 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:12,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:12,562 INFO L82 PathProgramCache]: Analyzing trace with hash -803708109, now seen corresponding path program 1 times [2019-11-06 19:14:12,575 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:12,576 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407897131] [2019-11-06 19:14:12,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:12,938 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407897131] [2019-11-06 19:14:12,939 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:14:12,940 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:14:12,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884678524] [2019-11-06 19:14:12,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:12,948 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:12,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:12,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:14:12,965 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:14:15,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:15,701 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-11-06 19:14:15,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:14:15,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-11-06 19:14:15,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:15,725 INFO L225 Difference]: With dead ends: 886 [2019-11-06 19:14:15,726 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:14:15,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:15,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:14:15,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-11-06 19:14:15,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-06 19:14:15,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-11-06 19:14:15,853 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 24 [2019-11-06 19:14:15,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:15,855 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-11-06 19:14:15,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:15,855 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-11-06 19:14:15,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 19:14:15,868 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:15,869 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:15,870 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:15,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:15,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1307539406, now seen corresponding path program 1 times [2019-11-06 19:14:15,871 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:15,871 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567877241] [2019-11-06 19:14:15,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:16,190 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567877241] [2019-11-06 19:14:16,190 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:14:16,190 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:14:16,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524797762] [2019-11-06 19:14:16,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:14:16,193 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:16,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:14:16,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:14:16,194 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-11-06 19:14:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:18,346 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-11-06 19:14:18,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:14:18,347 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 98 [2019-11-06 19:14:18,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:18,354 INFO L225 Difference]: With dead ends: 1320 [2019-11-06 19:14:18,355 INFO L226 Difference]: Without dead ends: 768 [2019-11-06 19:14:18,357 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:14:18,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-11-06 19:14:18,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-11-06 19:14:18,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-11-06 19:14:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-11-06 19:14:18,391 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 98 [2019-11-06 19:14:18,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:18,392 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-11-06 19:14:18,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:14:18,392 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-11-06 19:14:18,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-06 19:14:18,394 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:18,394 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:18,394 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:18,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:18,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1750148479, now seen corresponding path program 1 times [2019-11-06 19:14:18,395 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:18,395 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367833849] [2019-11-06 19:14:18,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:18,564 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367833849] [2019-11-06 19:14:18,565 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637481824] [2019-11-06 19:14:18,565 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 [2019-11-06 19:14:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:18,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:18,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:18,719 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:18,719 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:14:18,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149333118] [2019-11-06 19:14:18,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:18,721 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:18,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:18,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:18,721 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-11-06 19:14:19,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:19,650 INFO L93 Difference]: Finished difference Result 1676 states and 2459 transitions. [2019-11-06 19:14:19,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:19,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2019-11-06 19:14:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:19,658 INFO L225 Difference]: With dead ends: 1676 [2019-11-06 19:14:19,658 INFO L226 Difference]: Without dead ends: 1116 [2019-11-06 19:14:19,660 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:19,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2019-11-06 19:14:19,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 932. [2019-11-06 19:14:19,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2019-11-06 19:14:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1275 transitions. [2019-11-06 19:14:19,695 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1275 transitions. Word has length 107 [2019-11-06 19:14:19,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:19,695 INFO L462 AbstractCegarLoop]: Abstraction has 932 states and 1275 transitions. [2019-11-06 19:14:19,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:19,696 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1275 transitions. [2019-11-06 19:14:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-11-06 19:14:19,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:19,701 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:19,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:19,912 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:19,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:19,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1588575235, now seen corresponding path program 1 times [2019-11-06 19:14:19,913 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:19,913 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927724911] [2019-11-06 19:14:19,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:14:20,321 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927724911] [2019-11-06 19:14:20,321 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076706003] [2019-11-06 19:14:20,321 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 [2019-11-06 19:14:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:20,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:20,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:14:20,474 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:20,474 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:14:20,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696686688] [2019-11-06 19:14:20,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:20,478 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:20,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:20,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:20,479 INFO L87 Difference]: Start difference. First operand 932 states and 1275 transitions. Second operand 3 states. [2019-11-06 19:14:21,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:21,436 INFO L93 Difference]: Finished difference Result 2412 states and 3390 transitions. [2019-11-06 19:14:21,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:21,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 210 [2019-11-06 19:14:21,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:21,452 INFO L225 Difference]: With dead ends: 2412 [2019-11-06 19:14:21,453 INFO L226 Difference]: Without dead ends: 1486 [2019-11-06 19:14:21,456 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:21,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2019-11-06 19:14:21,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1302. [2019-11-06 19:14:21,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2019-11-06 19:14:21,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1746 transitions. [2019-11-06 19:14:21,513 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1746 transitions. Word has length 210 [2019-11-06 19:14:21,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:21,515 INFO L462 AbstractCegarLoop]: Abstraction has 1302 states and 1746 transitions. [2019-11-06 19:14:21,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:21,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1746 transitions. [2019-11-06 19:14:21,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-11-06 19:14:21,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:21,526 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:21,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:21,732 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:21,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:21,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1682277713, now seen corresponding path program 1 times [2019-11-06 19:14:21,733 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:21,734 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637053939] [2019-11-06 19:14:21,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 19:14:22,042 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637053939] [2019-11-06 19:14:22,042 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474028172] [2019-11-06 19:14:22,043 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 [2019-11-06 19:14:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:22,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:22,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 19:14:22,239 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:22,239 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-11-06 19:14:22,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980568218] [2019-11-06 19:14:22,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:22,240 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:22,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:22,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:14:22,241 INFO L87 Difference]: Start difference. First operand 1302 states and 1746 transitions. Second operand 3 states. [2019-11-06 19:14:23,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:23,053 INFO L93 Difference]: Finished difference Result 3702 states and 5056 transitions. [2019-11-06 19:14:23,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:23,055 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2019-11-06 19:14:23,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:23,068 INFO L225 Difference]: With dead ends: 3702 [2019-11-06 19:14:23,069 INFO L226 Difference]: Without dead ends: 2406 [2019-11-06 19:14:23,072 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:14:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2019-11-06 19:14:23,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2224. [2019-11-06 19:14:23,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2224 states. [2019-11-06 19:14:23,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 2933 transitions. [2019-11-06 19:14:23,140 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 2933 transitions. Word has length 216 [2019-11-06 19:14:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:23,141 INFO L462 AbstractCegarLoop]: Abstraction has 2224 states and 2933 transitions. [2019-11-06 19:14:23,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:23,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 2933 transitions. [2019-11-06 19:14:23,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-11-06 19:14:23,145 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:23,145 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:14:23,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:23,350 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:23,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1807502101, now seen corresponding path program 1 times [2019-11-06 19:14:23,350 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:23,350 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098070537] [2019-11-06 19:14:23,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 19:14:23,585 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098070537] [2019-11-06 19:14:23,586 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594985996] [2019-11-06 19:14:23,586 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 [2019-11-06 19:14:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:23,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:23,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 19:14:23,737 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:23,737 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 19:14:23,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064744435] [2019-11-06 19:14:23,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:23,739 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:23,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:23,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:14:23,739 INFO L87 Difference]: Start difference. First operand 2224 states and 2933 transitions. Second operand 3 states. [2019-11-06 19:14:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:24,767 INFO L93 Difference]: Finished difference Result 5180 states and 6986 transitions. [2019-11-06 19:14:24,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:24,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 230 [2019-11-06 19:14:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:24,790 INFO L225 Difference]: With dead ends: 5180 [2019-11-06 19:14:24,790 INFO L226 Difference]: Without dead ends: 2962 [2019-11-06 19:14:24,799 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:14:24,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2019-11-06 19:14:24,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2780. [2019-11-06 19:14:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2780 states. [2019-11-06 19:14:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 3722 transitions. [2019-11-06 19:14:24,941 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 3722 transitions. Word has length 230 [2019-11-06 19:14:24,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:24,942 INFO L462 AbstractCegarLoop]: Abstraction has 2780 states and 3722 transitions. [2019-11-06 19:14:24,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:24,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 3722 transitions. [2019-11-06 19:14:24,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-11-06 19:14:24,951 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:24,951 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:25,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:25,156 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:25,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:25,157 INFO L82 PathProgramCache]: Analyzing trace with hash 710456757, now seen corresponding path program 1 times [2019-11-06 19:14:25,157 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:25,157 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673456627] [2019-11-06 19:14:25,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:14:25,921 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673456627] [2019-11-06 19:14:25,921 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592450825] [2019-11-06 19:14:25,921 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 [2019-11-06 19:14:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:26,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:14:26,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:26,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:14:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 19:14:26,209 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:26,210 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2019-11-06 19:14:26,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884253886] [2019-11-06 19:14:26,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:26,211 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:26,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:26,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:14:26,212 INFO L87 Difference]: Start difference. First operand 2780 states and 3722 transitions. Second operand 5 states. [2019-11-06 19:14:27,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:27,901 INFO L93 Difference]: Finished difference Result 6146 states and 8216 transitions. [2019-11-06 19:14:27,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:14:27,902 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 278 [2019-11-06 19:14:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:27,931 INFO L225 Difference]: With dead ends: 6146 [2019-11-06 19:14:27,932 INFO L226 Difference]: Without dead ends: 3372 [2019-11-06 19:14:27,942 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:14:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2019-11-06 19:14:28,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 3184. [2019-11-06 19:14:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3184 states. [2019-11-06 19:14:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 4185 transitions. [2019-11-06 19:14:28,081 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 4185 transitions. Word has length 278 [2019-11-06 19:14:28,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:28,082 INFO L462 AbstractCegarLoop]: Abstraction has 3184 states and 4185 transitions. [2019-11-06 19:14:28,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:28,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 4185 transitions. [2019-11-06 19:14:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2019-11-06 19:14:28,103 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:28,103 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:28,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:28,318 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:28,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:28,318 INFO L82 PathProgramCache]: Analyzing trace with hash -987748772, now seen corresponding path program 1 times [2019-11-06 19:14:28,318 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:28,318 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272268305] [2019-11-06 19:14:28,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 61 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:14:29,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272268305] [2019-11-06 19:14:29,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113263432] [2019-11-06 19:14:29,473 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 [2019-11-06 19:14:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:29,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:14:29,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:29,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:14:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 260 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 19:14:29,939 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:29,940 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-06 19:14:29,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287915576] [2019-11-06 19:14:29,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:14:29,941 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:29,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:14:29,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:14:29,942 INFO L87 Difference]: Start difference. First operand 3184 states and 4185 transitions. Second operand 16 states. [2019-11-06 19:14:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:34,079 INFO L93 Difference]: Finished difference Result 6682 states and 8813 transitions. [2019-11-06 19:14:34,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 19:14:34,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 362 [2019-11-06 19:14:34,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:34,097 INFO L225 Difference]: With dead ends: 6682 [2019-11-06 19:14:34,098 INFO L226 Difference]: Without dead ends: 3457 [2019-11-06 19:14:34,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:14:34,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2019-11-06 19:14:34,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 3382. [2019-11-06 19:14:34,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3382 states. [2019-11-06 19:14:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 4139 transitions. [2019-11-06 19:14:34,234 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 4139 transitions. Word has length 362 [2019-11-06 19:14:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:34,234 INFO L462 AbstractCegarLoop]: Abstraction has 3382 states and 4139 transitions. [2019-11-06 19:14:34,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:14:34,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 4139 transitions. [2019-11-06 19:14:34,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2019-11-06 19:14:34,245 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:34,246 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:34,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:34,452 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:34,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1145133969, now seen corresponding path program 1 times [2019-11-06 19:14:34,453 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:34,453 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560819138] [2019-11-06 19:14:34,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 122 proven. 252 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:14:35,101 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560819138] [2019-11-06 19:14:35,102 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066665739] [2019-11-06 19:14:35,102 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 [2019-11-06 19:14:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:35,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:14:35,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:35,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:14:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 233 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-11-06 19:14:35,474 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:35,474 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-11-06 19:14:35,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393329330] [2019-11-06 19:14:35,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:35,475 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:35,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:35,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:14:35,476 INFO L87 Difference]: Start difference. First operand 3382 states and 4139 transitions. Second operand 5 states. [2019-11-06 19:14:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:36,583 INFO L93 Difference]: Finished difference Result 7318 states and 9006 transitions. [2019-11-06 19:14:36,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:14:36,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 387 [2019-11-06 19:14:36,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:36,598 INFO L225 Difference]: With dead ends: 7318 [2019-11-06 19:14:36,599 INFO L226 Difference]: Without dead ends: 3942 [2019-11-06 19:14:36,607 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 388 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:14:36,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2019-11-06 19:14:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 3940. [2019-11-06 19:14:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3940 states. [2019-11-06 19:14:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 4829 transitions. [2019-11-06 19:14:36,700 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 4829 transitions. Word has length 387 [2019-11-06 19:14:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:36,701 INFO L462 AbstractCegarLoop]: Abstraction has 3940 states and 4829 transitions. [2019-11-06 19:14:36,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 4829 transitions. [2019-11-06 19:14:36,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2019-11-06 19:14:36,717 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:36,717 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2019-11-06 19:14:36,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:36,930 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:36,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:36,930 INFO L82 PathProgramCache]: Analyzing trace with hash -197185924, now seen corresponding path program 1 times [2019-11-06 19:14:36,930 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:36,931 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12461933] [2019-11-06 19:14:36,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:38,022 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 294 proven. 111 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-06 19:14:38,022 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12461933] [2019-11-06 19:14:38,023 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005693376] [2019-11-06 19:14:38,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:38,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:14:38,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 601 proven. 2 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-11-06 19:14:38,362 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:38,362 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-11-06 19:14:38,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656689207] [2019-11-06 19:14:38,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:14:38,364 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:38,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:14:38,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:14:38,365 INFO L87 Difference]: Start difference. First operand 3940 states and 4829 transitions. Second operand 9 states. [2019-11-06 19:14:40,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:40,304 INFO L93 Difference]: Finished difference Result 7700 states and 9473 transitions. [2019-11-06 19:14:40,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:14:40,305 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 497 [2019-11-06 19:14:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:40,320 INFO L225 Difference]: With dead ends: 7700 [2019-11-06 19:14:40,320 INFO L226 Difference]: Without dead ends: 3948 [2019-11-06 19:14:40,328 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 510 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:14:40,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2019-11-06 19:14:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3944. [2019-11-06 19:14:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3944 states. [2019-11-06 19:14:40,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3944 states to 3944 states and 4591 transitions. [2019-11-06 19:14:40,405 INFO L78 Accepts]: Start accepts. Automaton has 3944 states and 4591 transitions. Word has length 497 [2019-11-06 19:14:40,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:40,405 INFO L462 AbstractCegarLoop]: Abstraction has 3944 states and 4591 transitions. [2019-11-06 19:14:40,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:14:40,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3944 states and 4591 transitions. [2019-11-06 19:14:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2019-11-06 19:14:40,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:40,423 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2019-11-06 19:14:40,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:40,628 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:40,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:40,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1008975267, now seen corresponding path program 1 times [2019-11-06 19:14:40,629 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:40,629 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864395696] [2019-11-06 19:14:40,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:40,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 403 proven. 119 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-11-06 19:14:42,224 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864395696] [2019-11-06 19:14:42,224 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225751173] [2019-11-06 19:14:42,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:42,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 19:14:42,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:42,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:14:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 789 proven. 2 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-06 19:14:43,063 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:43,063 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-11-06 19:14:43,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73528078] [2019-11-06 19:14:43,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:14:43,065 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:43,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:14:43,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:14:43,066 INFO L87 Difference]: Start difference. First operand 3944 states and 4591 transitions. Second operand 12 states.