/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_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:12:28,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:12:28,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:12:28,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:12:28,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:12:28,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:12:28,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:12:28,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:12:28,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:12:28,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:12:28,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:12:28,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:12:28,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:12:28,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:12:28,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:12:28,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:12:28,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:12:28,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:12:28,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:12:28,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:12:28,477 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 19:12:28,491 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:12:28,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:12:28,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:12:28,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:12:28,493 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:12:28,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:12:28,494 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:12:28,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:12:28,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:12:28,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:12:28,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:12:28,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:12:28,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:12:28,495 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:12:28,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:12:28,495 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:12:28,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:12:28,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:12:28,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:12:28,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:12:28,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:12:28,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:12:28,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:12:28,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:12:28,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:12:28,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:12:28,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:12:28,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:12:28,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:12:28,772 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:12:28,786 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:12:28,789 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:12:28,791 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:12:28,791 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:12:28,792 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label08.c [2019-11-06 19:12:28,855 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34057b036/db2e49f58ad3499e928754591349487f/FLAG6bbcd4b43 [2019-11-06 19:12:29,449 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:12:29,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label08.c [2019-11-06 19:12:29,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34057b036/db2e49f58ad3499e928754591349487f/FLAG6bbcd4b43 [2019-11-06 19:12:29,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34057b036/db2e49f58ad3499e928754591349487f [2019-11-06 19:12:29,720 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:12:29,721 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:12:29,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:12:29,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:12:29,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:12:29,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:12:29" (1/1) ... [2019-11-06 19:12:29,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73c95312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:29, skipping insertion in model container [2019-11-06 19:12:29,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:12:29" (1/1) ... [2019-11-06 19:12:29,738 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:12:29,789 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:12:30,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:12:30,417 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:12:30,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:12:30,583 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:12:30,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:30 WrapperNode [2019-11-06 19:12:30,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:12:30,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:12:30,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:12:30,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:12:30,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:30" (1/1) ... [2019-11-06 19:12:30,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:30" (1/1) ... [2019-11-06 19:12:30,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:30" (1/1) ... [2019-11-06 19:12:30,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:30" (1/1) ... [2019-11-06 19:12:30,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:30" (1/1) ... [2019-11-06 19:12:30,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:30" (1/1) ... [2019-11-06 19:12:30,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:30" (1/1) ... [2019-11-06 19:12:30,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:12:30,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:12:30,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:12:30,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:12:30,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:30" (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 19:12:30,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:12:30,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:12:30,815 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:12:30,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:12:30,816 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:12:30,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:12:30,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:12:30,817 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:12:30,817 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:12:30,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:12:30,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:12:32,151 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:12:32,151 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:12:32,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:12:32 BoogieIcfgContainer [2019-11-06 19:12:32,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:12:32,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:12:32,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:12:32,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:12:32,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:12:29" (1/3) ... [2019-11-06 19:12:32,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6a9e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:12:32, skipping insertion in model container [2019-11-06 19:12:32,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:30" (2/3) ... [2019-11-06 19:12:32,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6a9e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:12:32, skipping insertion in model container [2019-11-06 19:12:32,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:12:32" (3/3) ... [2019-11-06 19:12:32,179 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label08.c [2019-11-06 19:12:32,192 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:12:32,203 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:12:32,215 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:12:32,253 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:12:32,253 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:12:32,253 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:12:32,253 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:12:32,253 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:12:32,254 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:12:32,254 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:12:32,254 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:12:32,286 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:12:32,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 19:12:32,291 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:32,292 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:12:32,294 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:32,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:32,299 INFO L82 PathProgramCache]: Analyzing trace with hash -597113733, now seen corresponding path program 1 times [2019-11-06 19:12:32,306 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:32,306 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352600058] [2019-11-06 19:12:32,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:32,632 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 19:12:32,634 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352600058] [2019-11-06 19:12:32,635 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:32,635 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:12:32,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16931540] [2019-11-06 19:12:32,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:12:32,644 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:32,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:12:32,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:12:32,666 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:12:34,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:34,987 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-11-06 19:12:34,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:12:34,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-11-06 19:12:34,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:35,053 INFO L225 Difference]: With dead ends: 886 [2019-11-06 19:12:35,053 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:12:35,071 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 19:12:35,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:12:35,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-11-06 19:12:35,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-06 19:12:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-11-06 19:12:35,230 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 18 [2019-11-06 19:12:35,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:35,230 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-11-06 19:12:35,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:12:35,231 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-11-06 19:12:35,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-06 19:12:35,235 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:35,235 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:12:35,236 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:35,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:35,236 INFO L82 PathProgramCache]: Analyzing trace with hash -866058331, now seen corresponding path program 1 times [2019-11-06 19:12:35,236 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:35,237 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797296857] [2019-11-06 19:12:35,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:35,562 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797296857] [2019-11-06 19:12:35,562 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:35,562 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:12:35,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691743683] [2019-11-06 19:12:35,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:12:35,565 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:35,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:12:35,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:12:35,565 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-11-06 19:12:38,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:38,155 INFO L93 Difference]: Finished difference Result 2246 states and 3775 transitions. [2019-11-06 19:12:38,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:12:38,156 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 87 [2019-11-06 19:12:38,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:38,169 INFO L225 Difference]: With dead ends: 2246 [2019-11-06 19:12:38,170 INFO L226 Difference]: Without dead ends: 1694 [2019-11-06 19:12:38,173 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:12:38,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2019-11-06 19:12:38,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 938. [2019-11-06 19:12:38,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2019-11-06 19:12:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1456 transitions. [2019-11-06 19:12:38,231 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1456 transitions. Word has length 87 [2019-11-06 19:12:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:38,231 INFO L462 AbstractCegarLoop]: Abstraction has 938 states and 1456 transitions. [2019-11-06 19:12:38,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:12:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1456 transitions. [2019-11-06 19:12:38,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-06 19:12:38,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:38,237 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:12:38,237 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:38,237 INFO L82 PathProgramCache]: Analyzing trace with hash 903171785, now seen corresponding path program 1 times [2019-11-06 19:12:38,238 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:38,238 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807799118] [2019-11-06 19:12:38,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:38,533 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807799118] [2019-11-06 19:12:38,533 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:38,533 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:12:38,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158523406] [2019-11-06 19:12:38,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:12:38,535 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:38,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:12:38,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:12:38,535 INFO L87 Difference]: Start difference. First operand 938 states and 1456 transitions. Second operand 8 states. [2019-11-06 19:12:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:41,949 INFO L93 Difference]: Finished difference Result 3278 states and 5571 transitions. [2019-11-06 19:12:41,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:12:41,950 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 117 [2019-11-06 19:12:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:41,970 INFO L225 Difference]: With dead ends: 3278 [2019-11-06 19:12:41,970 INFO L226 Difference]: Without dead ends: 2346 [2019-11-06 19:12:41,974 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:12:41,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2019-11-06 19:12:42,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1926. [2019-11-06 19:12:42,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1926 states. [2019-11-06 19:12:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 2910 transitions. [2019-11-06 19:12:42,070 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 2910 transitions. Word has length 117 [2019-11-06 19:12:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:42,071 INFO L462 AbstractCegarLoop]: Abstraction has 1926 states and 2910 transitions. [2019-11-06 19:12:42,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:12:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 2910 transitions. [2019-11-06 19:12:42,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-11-06 19:12:42,079 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:42,079 INFO L410 BasicCegarLoop]: trace histogram [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, 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 19:12:42,079 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:42,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:42,080 INFO L82 PathProgramCache]: Analyzing trace with hash -399824422, now seen corresponding path program 1 times [2019-11-06 19:12:42,080 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:42,080 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996437480] [2019-11-06 19:12:42,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-06 19:12:42,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996437480] [2019-11-06 19:12:42,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462925712] [2019-11-06 19:12:42,386 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 19:12:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:42,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:42,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-06 19:12:42,705 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:42,706 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:12:42,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591667068] [2019-11-06 19:12:42,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:12:42,709 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:42,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:12:42,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:42,710 INFO L87 Difference]: Start difference. First operand 1926 states and 2910 transitions. Second operand 3 states. [2019-11-06 19:12:43,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:43,596 INFO L93 Difference]: Finished difference Result 4406 states and 6778 transitions. [2019-11-06 19:12:43,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:12:43,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 229 [2019-11-06 19:12:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:43,615 INFO L225 Difference]: With dead ends: 4406 [2019-11-06 19:12:43,616 INFO L226 Difference]: Without dead ends: 2486 [2019-11-06 19:12:43,623 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 234 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 19:12:43,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2019-11-06 19:12:43,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2304. [2019-11-06 19:12:43,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2304 states. [2019-11-06 19:12:43,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3596 transitions. [2019-11-06 19:12:43,722 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3596 transitions. Word has length 229 [2019-11-06 19:12:43,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:43,724 INFO L462 AbstractCegarLoop]: Abstraction has 2304 states and 3596 transitions. [2019-11-06 19:12:43,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:12:43,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3596 transitions. [2019-11-06 19:12:43,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-11-06 19:12:43,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:43,733 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:43,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:43,946 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:43,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:43,947 INFO L82 PathProgramCache]: Analyzing trace with hash 899186239, now seen corresponding path program 1 times [2019-11-06 19:12:43,948 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:43,948 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401779445] [2019-11-06 19:12:43,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:12:44,377 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401779445] [2019-11-06 19:12:44,377 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280225591] [2019-11-06 19:12:44,378 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 19:12:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:44,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:44,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:44,575 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:12:44,575 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:12:44,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212902295] [2019-11-06 19:12:44,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:12:44,576 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:44,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:12:44,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:12:44,577 INFO L87 Difference]: Start difference. First operand 2304 states and 3596 transitions. Second operand 11 states. [2019-11-06 19:12:49,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:49,552 INFO L93 Difference]: Finished difference Result 7878 states and 14601 transitions. [2019-11-06 19:12:49,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 19:12:49,552 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 230 [2019-11-06 19:12:49,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:49,592 INFO L225 Difference]: With dead ends: 7878 [2019-11-06 19:12:49,592 INFO L226 Difference]: Without dead ends: 4612 [2019-11-06 19:12:49,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:12:49,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4612 states. [2019-11-06 19:12:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4612 to 4522. [2019-11-06 19:12:49,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4522 states. [2019-11-06 19:12:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 6746 transitions. [2019-11-06 19:12:49,912 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 6746 transitions. Word has length 230 [2019-11-06 19:12:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:49,914 INFO L462 AbstractCegarLoop]: Abstraction has 4522 states and 6746 transitions. [2019-11-06 19:12:49,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:12:49,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 6746 transitions. [2019-11-06 19:12:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-11-06 19:12:49,927 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:49,928 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:12:50,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:50,142 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:50,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:50,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1658054871, now seen corresponding path program 1 times [2019-11-06 19:12:50,144 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:50,144 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895867820] [2019-11-06 19:12:50,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-11-06 19:12:50,363 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895867820] [2019-11-06 19:12:50,363 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126986851] [2019-11-06 19:12:50,367 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 19:12:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:50,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:50,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:50,503 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-11-06 19:12:50,504 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:50,504 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-11-06 19:12:50,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092501894] [2019-11-06 19:12:50,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:12:50,505 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:50,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:12:50,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:12:50,506 INFO L87 Difference]: Start difference. First operand 4522 states and 6746 transitions. Second operand 3 states. [2019-11-06 19:12:51,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:51,460 INFO L93 Difference]: Finished difference Result 10526 states and 15929 transitions. [2019-11-06 19:12:51,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:12:51,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 234 [2019-11-06 19:12:51,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:51,497 INFO L225 Difference]: With dead ends: 10526 [2019-11-06 19:12:51,497 INFO L226 Difference]: Without dead ends: 6018 [2019-11-06 19:12:51,521 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 239 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:12:51,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2019-11-06 19:12:51,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 5272. [2019-11-06 19:12:51,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5272 states. [2019-11-06 19:12:51,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5272 states to 5272 states and 7845 transitions. [2019-11-06 19:12:51,740 INFO L78 Accepts]: Start accepts. Automaton has 5272 states and 7845 transitions. Word has length 234 [2019-11-06 19:12:51,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:51,741 INFO L462 AbstractCegarLoop]: Abstraction has 5272 states and 7845 transitions. [2019-11-06 19:12:51,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:12:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 5272 states and 7845 transitions. [2019-11-06 19:12:51,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2019-11-06 19:12:51,752 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:51,752 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:51,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:51,965 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:51,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1571879831, now seen corresponding path program 1 times [2019-11-06 19:12:51,966 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:51,966 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807978702] [2019-11-06 19:12:51,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:12:52,306 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807978702] [2019-11-06 19:12:52,306 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613299488] [2019-11-06 19:12:52,306 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 19:12:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:52,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:52,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:52,549 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:12:52,549 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:12:52,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690916449] [2019-11-06 19:12:52,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:12:52,551 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:52,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:12:52,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:12:52,553 INFO L87 Difference]: Start difference. First operand 5272 states and 7845 transitions. Second operand 11 states. [2019-11-06 19:12:56,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:56,367 INFO L93 Difference]: Finished difference Result 11986 states and 17838 transitions. [2019-11-06 19:12:56,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 19:12:56,368 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 242 [2019-11-06 19:12:56,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:56,417 INFO L225 Difference]: With dead ends: 11986 [2019-11-06 19:12:56,421 INFO L226 Difference]: Without dead ends: 5960 [2019-11-06 19:12:56,460 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:12:56,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5960 states. [2019-11-06 19:12:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5960 to 4216. [2019-11-06 19:12:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4216 states. [2019-11-06 19:12:56,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4216 states to 4216 states and 5708 transitions. [2019-11-06 19:12:56,702 INFO L78 Accepts]: Start accepts. Automaton has 4216 states and 5708 transitions. Word has length 242 [2019-11-06 19:12:56,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:56,703 INFO L462 AbstractCegarLoop]: Abstraction has 4216 states and 5708 transitions. [2019-11-06 19:12:56,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:12:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 4216 states and 5708 transitions. [2019-11-06 19:12:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-11-06 19:12:56,720 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:56,720 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:12:56,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:56,933 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:56,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:56,934 INFO L82 PathProgramCache]: Analyzing trace with hash -121492162, now seen corresponding path program 1 times [2019-11-06 19:12:56,934 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:56,934 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507964015] [2019-11-06 19:12:56,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:12:57,837 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507964015] [2019-11-06 19:12:57,837 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694989424] [2019-11-06 19:12:57,837 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 19:12:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:57,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:12:57,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:57,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:12:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 19:12:58,069 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:58,069 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-11-06 19:12:58,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136944529] [2019-11-06 19:12:58,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:12:58,070 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:58,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:12:58,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:12:58,071 INFO L87 Difference]: Start difference. First operand 4216 states and 5708 transitions. Second operand 5 states. [2019-11-06 19:12:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:59,445 INFO L93 Difference]: Finished difference Result 7492 states and 10255 transitions. [2019-11-06 19:12:59,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:12:59,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2019-11-06 19:12:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:59,461 INFO L225 Difference]: With dead ends: 7492 [2019-11-06 19:12:59,461 INFO L226 Difference]: Without dead ends: 4220 [2019-11-06 19:12:59,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 261 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-11-06 19:12:59,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2019-11-06 19:12:59,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 4012. [2019-11-06 19:12:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4012 states. [2019-11-06 19:12:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4012 states to 4012 states and 5368 transitions. [2019-11-06 19:12:59,582 INFO L78 Accepts]: Start accepts. Automaton has 4012 states and 5368 transitions. Word has length 259 [2019-11-06 19:12:59,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:59,582 INFO L462 AbstractCegarLoop]: Abstraction has 4012 states and 5368 transitions. [2019-11-06 19:12:59,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:12:59,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4012 states and 5368 transitions. [2019-11-06 19:12:59,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2019-11-06 19:12:59,589 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:59,590 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:12:59,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:59,793 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:59,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:59,794 INFO L82 PathProgramCache]: Analyzing trace with hash 813242422, now seen corresponding path program 1 times [2019-11-06 19:12:59,794 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:59,794 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507656237] [2019-11-06 19:12:59,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 22 proven. 124 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:13:00,200 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507656237] [2019-11-06 19:13:00,201 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789589669] [2019-11-06 19:13:00,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:13:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:00,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:13:00,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 19:13:00,598 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:00,598 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:13:00,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598076968] [2019-11-06 19:13:00,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:13:00,599 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:00,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:13:00,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:13:00,600 INFO L87 Difference]: Start difference. First operand 4012 states and 5368 transitions. Second operand 5 states. [2019-11-06 19:13:01,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:01,799 INFO L93 Difference]: Finished difference Result 6644 states and 8936 transitions. [2019-11-06 19:13:01,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:13:01,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 287 [2019-11-06 19:13:01,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:01,808 INFO L225 Difference]: With dead ends: 6644 [2019-11-06 19:13:01,808 INFO L226 Difference]: Without dead ends: 3030 [2019-11-06 19:13:01,817 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:13:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2019-11-06 19:13:01,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2994. [2019-11-06 19:13:01,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2994 states. [2019-11-06 19:13:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 3723 transitions. [2019-11-06 19:13:01,884 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 3723 transitions. Word has length 287 [2019-11-06 19:13:01,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:01,885 INFO L462 AbstractCegarLoop]: Abstraction has 2994 states and 3723 transitions. [2019-11-06 19:13:01,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:13:01,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 3723 transitions. [2019-11-06 19:13:01,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-11-06 19:13:01,892 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:01,893 INFO L410 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 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 19:13:02,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:02,096 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:02,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:02,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1137249175, now seen corresponding path program 1 times [2019-11-06 19:13:02,097 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:02,097 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484011168] [2019-11-06 19:13:02,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 43 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:13:03,342 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484011168] [2019-11-06 19:13:03,343 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5338921] [2019-11-06 19:13:03,343 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 19:13:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:03,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:13:03,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:03,534 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:13:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 248 proven. 53 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 19:13:03,759 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:03,760 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-06 19:13:03,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258122609] [2019-11-06 19:13:03,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:13:03,763 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:03,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:13:03,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:13:03,763 INFO L87 Difference]: Start difference. First operand 2994 states and 3723 transitions. Second operand 16 states.