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_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:01:15,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:01:15,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:01:15,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-14 22:01:15,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:01:15,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:01:15,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:01:15,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:01:15,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:01:15,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:01:15,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:01:15,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:01:15,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:01:15,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:01:15,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:01:15,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:01:15,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:01:15,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:01:15,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:01:15,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:01:15,287 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 [2019-10-14 22:01:15,308 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:01:15,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:01:15,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:01:15,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:01:15,311 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:01:15,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:01:15,312 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:01:15,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:01:15,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:01:15,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:01:15,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:01:15,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:01:15,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:01:15,314 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:01:15,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:01:15,314 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:01:15,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:01:15,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:01:15,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:01:15,315 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:01:15,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:01:15,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:01:15,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:01:15,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:01:15,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:01:15,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:01:15,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:01:15,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:01:15,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:01:15,675 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:01:15,697 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:01:15,701 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:01:15,702 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:01:15,703 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:01:15,704 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label14.c [2019-10-14 22:01:15,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9320852a5/456cc233cf584058ae0ce9fa7b453664/FLAGb63cbd3cf [2019-10-14 22:01:16,381 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:01:16,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label14.c [2019-10-14 22:01:16,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9320852a5/456cc233cf584058ae0ce9fa7b453664/FLAGb63cbd3cf [2019-10-14 22:01:16,637 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9320852a5/456cc233cf584058ae0ce9fa7b453664 [2019-10-14 22:01:16,647 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:01:16,649 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:01:16,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:16,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:01:16,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:01:16,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:16" (1/1) ... [2019-10-14 22:01:16,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2e6592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:16, skipping insertion in model container [2019-10-14 22:01:16,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:16" (1/1) ... [2019-10-14 22:01:16,669 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:01:16,718 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:01:17,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:17,323 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:01:17,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:17,640 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:01:17,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:17 WrapperNode [2019-10-14 22:01:17,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:17,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:01:17,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:01:17,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:01:17,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:17" (1/1) ... [2019-10-14 22:01:17,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:17" (1/1) ... [2019-10-14 22:01:17,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:17" (1/1) ... [2019-10-14 22:01:17,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:17" (1/1) ... [2019-10-14 22:01:17,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:17" (1/1) ... [2019-10-14 22:01:17,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:17" (1/1) ... [2019-10-14 22:01:17,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:17" (1/1) ... [2019-10-14 22:01:17,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:01:17,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:01:17,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:01:17,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:01:17,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:17" (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 [2019-10-14 22:01:17,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:01:17,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:01:17,887 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:01:17,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:01:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:01:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:01:17,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:01:17,888 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:01:17,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:01:17,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:01:17,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:01:19,571 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:01:19,572 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:01:19,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:19 BoogieIcfgContainer [2019-10-14 22:01:19,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:01:19,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:01:19,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:01:19,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:01:19,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:01:16" (1/3) ... [2019-10-14 22:01:19,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da9ec30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:19, skipping insertion in model container [2019-10-14 22:01:19,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:17" (2/3) ... [2019-10-14 22:01:19,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da9ec30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:19, skipping insertion in model container [2019-10-14 22:01:19,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:19" (3/3) ... [2019-10-14 22:01:19,583 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label14.c [2019-10-14 22:01:19,593 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:01:19,601 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:01:19,613 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:01:19,642 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:01:19,642 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:01:19,643 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:01:19,643 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:01:19,643 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:01:19,643 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:01:19,643 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:01:19,643 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:01:19,668 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:01:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 22:01:19,675 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:19,676 INFO L380 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] [2019-10-14 22:01:19,678 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:19,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:19,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2013862189, now seen corresponding path program 1 times [2019-10-14 22:01:19,693 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:19,694 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156379853] [2019-10-14 22:01:19,694 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:19,694 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:19,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:20,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156379853] [2019-10-14 22:01:20,108 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:20,108 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:01:20,108 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474316946] [2019-10-14 22:01:20,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:20,114 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:20,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:20,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:01:20,133 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:01:22,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:22,877 INFO L93 Difference]: Finished difference Result 902 states and 1627 transitions. [2019-10-14 22:01:22,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:01:22,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2019-10-14 22:01:22,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:22,901 INFO L225 Difference]: With dead ends: 902 [2019-10-14 22:01:22,901 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:01:22,912 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:22,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:01:23,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-10-14 22:01:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-10-14 22:01:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 812 transitions. [2019-10-14 22:01:23,017 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 812 transitions. Word has length 32 [2019-10-14 22:01:23,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:23,018 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 812 transitions. [2019-10-14 22:01:23,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:23,018 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 812 transitions. [2019-10-14 22:01:23,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-14 22:01:23,027 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:23,028 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:23,028 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:23,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:23,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1275083330, now seen corresponding path program 1 times [2019-10-14 22:01:23,029 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:23,029 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237987800] [2019-10-14 22:01:23,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:23,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:23,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:23,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237987800] [2019-10-14 22:01:23,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100271226] [2019-10-14 22:01:23,382 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 [2019-10-14 22:01:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:23,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:23,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:23,635 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:23,635 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:01:23,635 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174572293] [2019-10-14 22:01:23,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:01:23,638 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:23,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:01:23,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:23,639 INFO L87 Difference]: Start difference. First operand 560 states and 812 transitions. Second operand 3 states. [2019-10-14 22:01:24,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:24,580 INFO L93 Difference]: Finished difference Result 1666 states and 2449 transitions. [2019-10-14 22:01:24,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:01:24,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 144 [2019-10-14 22:01:24,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:24,589 INFO L225 Difference]: With dead ends: 1666 [2019-10-14 22:01:24,589 INFO L226 Difference]: Without dead ends: 1112 [2019-10-14 22:01:24,591 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:24,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-10-14 22:01:24,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2019-10-14 22:01:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-10-14 22:01:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1563 transitions. [2019-10-14 22:01:24,646 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1563 transitions. Word has length 144 [2019-10-14 22:01:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:24,647 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1563 transitions. [2019-10-14 22:01:24,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:01:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1563 transitions. [2019-10-14 22:01:24,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-14 22:01:24,652 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:24,653 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:24,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:24,860 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:24,862 INFO L82 PathProgramCache]: Analyzing trace with hash -356380674, now seen corresponding path program 1 times [2019-10-14 22:01:24,862 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:24,863 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667495210] [2019-10-14 22:01:24,863 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:24,864 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:24,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:25,129 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667495210] [2019-10-14 22:01:25,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149630565] [2019-10-14 22:01:25,130 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 [2019-10-14 22:01:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:25,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:25,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:25,253 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:25,253 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:01:25,253 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069198251] [2019-10-14 22:01:25,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:01:25,255 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:25,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:01:25,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:25,256 INFO L87 Difference]: Start difference. First operand 1112 states and 1563 transitions. Second operand 3 states. [2019-10-14 22:01:26,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:26,175 INFO L93 Difference]: Finished difference Result 1666 states and 2397 transitions. [2019-10-14 22:01:26,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:01:26,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2019-10-14 22:01:26,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:26,185 INFO L225 Difference]: With dead ends: 1666 [2019-10-14 22:01:26,186 INFO L226 Difference]: Without dead ends: 1664 [2019-10-14 22:01:26,187 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2019-10-14 22:01:26,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1298. [2019-10-14 22:01:26,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1298 states. [2019-10-14 22:01:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1875 transitions. [2019-10-14 22:01:26,236 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1875 transitions. Word has length 162 [2019-10-14 22:01:26,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:26,236 INFO L462 AbstractCegarLoop]: Abstraction has 1298 states and 1875 transitions. [2019-10-14 22:01:26,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:01:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1875 transitions. [2019-10-14 22:01:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-10-14 22:01:26,241 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:26,242 INFO L380 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:26,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:26,448 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:26,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:26,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1544408570, now seen corresponding path program 1 times [2019-10-14 22:01:26,449 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:26,450 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740240785] [2019-10-14 22:01:26,450 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:26,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:26,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 97 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:01:26,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740240785] [2019-10-14 22:01:26,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005827333] [2019-10-14 22:01:26,820 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 [2019-10-14 22:01:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:26,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:01:26,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:27,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 22:01:27,168 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:27,168 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-10-14 22:01:27,169 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814792566] [2019-10-14 22:01:27,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:27,171 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:27,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:27,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:01:27,172 INFO L87 Difference]: Start difference. First operand 1298 states and 1875 transitions. Second operand 5 states. [2019-10-14 22:01:28,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:28,565 INFO L93 Difference]: Finished difference Result 2984 states and 4267 transitions. [2019-10-14 22:01:28,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:01:28,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2019-10-14 22:01:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:28,576 INFO L225 Difference]: With dead ends: 2984 [2019-10-14 22:01:28,577 INFO L226 Difference]: Without dead ends: 1692 [2019-10-14 22:01:28,580 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:01:28,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2019-10-14 22:01:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1686. [2019-10-14 22:01:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1686 states. [2019-10-14 22:01:28,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 2342 transitions. [2019-10-14 22:01:28,648 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 2342 transitions. Word has length 217 [2019-10-14 22:01:28,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:28,650 INFO L462 AbstractCegarLoop]: Abstraction has 1686 states and 2342 transitions. [2019-10-14 22:01:28,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:28,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 2342 transitions. [2019-10-14 22:01:28,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-10-14 22:01:28,655 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:28,655 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-14 22:01:28,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:28,859 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:28,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:28,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1655155903, now seen corresponding path program 1 times [2019-10-14 22:01:28,860 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:28,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568353810] [2019-10-14 22:01:28,861 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:28,861 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:28,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 22:01:29,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568353810] [2019-10-14 22:01:29,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759080274] [2019-10-14 22:01:29,241 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 [2019-10-14 22:01:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:29,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:29,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:29,457 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:29,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-14 22:01:29,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757695098] [2019-10-14 22:01:29,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:01:29,462 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:29,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:01:29,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:01:29,465 INFO L87 Difference]: Start difference. First operand 1686 states and 2342 transitions. Second operand 11 states. [2019-10-14 22:01:31,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:31,712 INFO L93 Difference]: Finished difference Result 4198 states and 6480 transitions. [2019-10-14 22:01:31,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 22:01:31,724 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 244 [2019-10-14 22:01:31,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:31,742 INFO L225 Difference]: With dead ends: 4198 [2019-10-14 22:01:31,743 INFO L226 Difference]: Without dead ends: 2700 [2019-10-14 22:01:31,748 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 247 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:01:31,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2019-10-14 22:01:31,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 2634. [2019-10-14 22:01:31,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2634 states. [2019-10-14 22:01:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 3652 transitions. [2019-10-14 22:01:31,838 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 3652 transitions. Word has length 244 [2019-10-14 22:01:31,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:31,839 INFO L462 AbstractCegarLoop]: Abstraction has 2634 states and 3652 transitions. [2019-10-14 22:01:31,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:01:31,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 3652 transitions. [2019-10-14 22:01:31,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2019-10-14 22:01:31,846 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:31,846 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2019-10-14 22:01:32,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:32,050 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:32,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:32,051 INFO L82 PathProgramCache]: Analyzing trace with hash 365148164, now seen corresponding path program 1 times [2019-10-14 22:01:32,052 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:32,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320512553] [2019-10-14 22:01:32,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:32,053 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:32,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 152 proven. 72 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-14 22:01:32,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320512553] [2019-10-14 22:01:32,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940659466] [2019-10-14 22:01:32,480 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 [2019-10-14 22:01:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:32,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:32,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 269 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 22:01:32,731 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:32,731 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:01:32,732 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227478245] [2019-10-14 22:01:32,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:01:32,735 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:32,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:01:32,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:01:32,737 INFO L87 Difference]: Start difference. First operand 2634 states and 3652 transitions. Second operand 11 states. [2019-10-14 22:01:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:36,731 INFO L93 Difference]: Finished difference Result 6754 states and 10443 transitions. [2019-10-14 22:01:36,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 22:01:36,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 290 [2019-10-14 22:01:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:36,759 INFO L225 Difference]: With dead ends: 6754 [2019-10-14 22:01:36,759 INFO L226 Difference]: Without dead ends: 4310 [2019-10-14 22:01:36,767 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2019-10-14 22:01:36,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2019-10-14 22:01:36,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4270. [2019-10-14 22:01:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4270 states. [2019-10-14 22:01:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4270 states to 4270 states and 6149 transitions. [2019-10-14 22:01:36,913 INFO L78 Accepts]: Start accepts. Automaton has 4270 states and 6149 transitions. Word has length 290 [2019-10-14 22:01:36,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:36,914 INFO L462 AbstractCegarLoop]: Abstraction has 4270 states and 6149 transitions. [2019-10-14 22:01:36,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:01:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4270 states and 6149 transitions. [2019-10-14 22:01:36,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2019-10-14 22:01:36,921 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:36,921 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:37,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:37,126 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:37,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:37,126 INFO L82 PathProgramCache]: Analyzing trace with hash -2083335041, now seen corresponding path program 1 times [2019-10-14 22:01:37,127 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:37,128 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655467158] [2019-10-14 22:01:37,129 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:37,129 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:37,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 85 proven. 213 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:01:38,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655467158] [2019-10-14 22:01:38,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139390149] [2019-10-14 22:01:38,187 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 [2019-10-14 22:01:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:38,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:01:38,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:38,363 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:01:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 226 proven. 53 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 22:01:38,628 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:38,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-14 22:01:38,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72897282] [2019-10-14 22:01:38,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:01:38,630 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:38,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:01:38,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:01:38,631 INFO L87 Difference]: Start difference. First operand 4270 states and 6149 transitions. Second operand 16 states. [2019-10-14 22:01:42,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:42,989 INFO L93 Difference]: Finished difference Result 8866 states and 12850 transitions. [2019-10-14 22:01:42,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 22:01:42,990 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 301 [2019-10-14 22:01:42,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:43,016 INFO L225 Difference]: With dead ends: 8866 [2019-10-14 22:01:43,016 INFO L226 Difference]: Without dead ends: 4727 [2019-10-14 22:01:43,037 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 22:01:43,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4727 states. [2019-10-14 22:01:43,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4727 to 4654. [2019-10-14 22:01:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4654 states. [2019-10-14 22:01:43,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4654 states to 4654 states and 6201 transitions. [2019-10-14 22:01:43,183 INFO L78 Accepts]: Start accepts. Automaton has 4654 states and 6201 transitions. Word has length 301 [2019-10-14 22:01:43,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:43,183 INFO L462 AbstractCegarLoop]: Abstraction has 4654 states and 6201 transitions. [2019-10-14 22:01:43,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 22:01:43,183 INFO L276 IsEmpty]: Start isEmpty. Operand 4654 states and 6201 transitions. [2019-10-14 22:01:43,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2019-10-14 22:01:43,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:43,193 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:43,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:43,397 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:43,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:43,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1877035878, now seen corresponding path program 1 times [2019-10-14 22:01:43,405 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:43,405 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787189832] [2019-10-14 22:01:43,406 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:43,406 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:43,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 72 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-10-14 22:01:43,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787189832] [2019-10-14 22:01:43,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409660563] [2019-10-14 22:01:43,814 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 [2019-10-14 22:01:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:43,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:43,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-14 22:01:44,128 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:44,128 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 22:01:44,129 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683258288] [2019-10-14 22:01:44,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:01:44,133 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:44,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:01:44,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:01:44,134 INFO L87 Difference]: Start difference. First operand 4654 states and 6201 transitions. Second operand 3 states. [2019-10-14 22:01:44,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:44,821 INFO L93 Difference]: Finished difference Result 5964 states and 7915 transitions. [2019-10-14 22:01:44,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:01:44,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 424 [2019-10-14 22:01:44,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:44,851 INFO L225 Difference]: With dead ends: 5964 [2019-10-14 22:01:44,851 INFO L226 Difference]: Without dead ends: 5962 [2019-10-14 22:01:44,856 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:01:44,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5962 states. [2019-10-14 22:01:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5962 to 5394. [2019-10-14 22:01:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5394 states. [2019-10-14 22:01:45,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5394 states to 5394 states and 7149 transitions. [2019-10-14 22:01:45,016 INFO L78 Accepts]: Start accepts. Automaton has 5394 states and 7149 transitions. Word has length 424 [2019-10-14 22:01:45,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:45,018 INFO L462 AbstractCegarLoop]: Abstraction has 5394 states and 7149 transitions. [2019-10-14 22:01:45,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:01:45,019 INFO L276 IsEmpty]: Start isEmpty. Operand 5394 states and 7149 transitions. [2019-10-14 22:01:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2019-10-14 22:01:45,036 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:45,037 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:45,249 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:45,249 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:45,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1392150877, now seen corresponding path program 1 times [2019-10-14 22:01:45,250 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:45,250 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914839713] [2019-10-14 22:01:45,250 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:45,250 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:45,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 313 proven. 328 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 22:01:47,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914839713] [2019-10-14 22:01:47,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108982978] [2019-10-14 22:01:47,170 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 [2019-10-14 22:01:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:47,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 22:01:47,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:47,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,315 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,318 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,319 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,322 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,323 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,323 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,325 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,842 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 34 [2019-10-14 22:01:47,930 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 5 terms [2019-10-14 22:01:47,930 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 6 terms [2019-10-14 22:01:47,932 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 6 terms [2019-10-14 22:01:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 513 proven. 2 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-10-14 22:01:48,299 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:48,300 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7] total 25 [2019-10-14 22:01:48,300 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095482446] [2019-10-14 22:01:48,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 22:01:48,301 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:48,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 22:01:48,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2019-10-14 22:01:48,302 INFO L87 Difference]: Start difference. First operand 5394 states and 7149 transitions. Second operand 25 states. [2019-10-14 22:01:49,837 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2019-10-14 22:01:49,988 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 75 [2019-10-14 22:01:51,013 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65