/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/Problem16_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:18:56,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:18:56,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:18:56,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:18:56,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:18:56,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:18:56,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:18:56,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:18:56,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:18:56,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:18:56,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:18:56,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:18:56,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:18:56,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:18:56,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:18:56,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:18:56,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:18:56,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:18:56,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:18:56,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:18:56,195 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 19:18:56,217 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:18:56,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:18:56,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:18:56,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:18:56,219 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:18:56,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:18:56,220 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:18:56,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:18:56,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:18:56,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:18:56,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:18:56,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:18:56,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:18:56,222 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:18:56,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:18:56,223 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:18:56,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:18:56,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:18:56,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:18:56,223 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:18:56,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:18:56,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:18:56,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:18:56,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:18:56,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:18:56,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:18:56,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:18:56,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:18:56,225 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:18:56,493 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:18:56,506 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:18:56,510 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:18:56,512 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:18:56,512 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:18:56,513 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label42.c [2019-11-06 19:18:56,583 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52bcfa224/e423579bce424173a6f135cec7bf3c04/FLAGa30b93488 [2019-11-06 19:18:57,220 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:18:57,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label42.c [2019-11-06 19:18:57,245 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52bcfa224/e423579bce424173a6f135cec7bf3c04/FLAGa30b93488 [2019-11-06 19:18:57,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52bcfa224/e423579bce424173a6f135cec7bf3c04 [2019-11-06 19:18:57,429 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:18:57,431 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:18:57,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:57,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:18:57,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:18:57,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:57" (1/1) ... [2019-11-06 19:18:57,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f9a9b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:57, skipping insertion in model container [2019-11-06 19:18:57,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:57" (1/1) ... [2019-11-06 19:18:57,449 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:18:57,529 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:18:58,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:58,371 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:18:58,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:58,734 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:18:58,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58 WrapperNode [2019-11-06 19:18:58,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:58,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:18:58,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:18:58,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:18:58,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (1/1) ... [2019-11-06 19:18:58,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (1/1) ... [2019-11-06 19:18:58,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (1/1) ... [2019-11-06 19:18:58,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (1/1) ... [2019-11-06 19:18:58,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (1/1) ... [2019-11-06 19:18:58,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (1/1) ... [2019-11-06 19:18:58,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (1/1) ... [2019-11-06 19:18:58,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:18:58,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:18:58,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:18:58,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:18:58,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (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 19:18:59,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:18:59,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:18:59,012 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:18:59,013 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:18:59,013 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:18:59,013 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:18:59,013 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:18:59,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:18:59,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:18:59,014 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:18:59,014 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:18:59,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:18:59,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:19:01,395 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:19:01,396 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:19:01,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:01 BoogieIcfgContainer [2019-11-06 19:19:01,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:19:01,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:19:01,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:19:01,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:19:01,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:18:57" (1/3) ... [2019-11-06 19:19:01,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db37e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:01, skipping insertion in model container [2019-11-06 19:19:01,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:58" (2/3) ... [2019-11-06 19:19:01,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db37e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:01, skipping insertion in model container [2019-11-06 19:19:01,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:01" (3/3) ... [2019-11-06 19:19:01,419 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label42.c [2019-11-06 19:19:01,430 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:19:01,443 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:19:01,455 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:19:01,498 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:19:01,499 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:19:01,499 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:19:01,499 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:19:01,499 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:19:01,500 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:19:01,500 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:19:01,500 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:19:01,539 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:19:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-06 19:19:01,549 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:01,550 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:19:01,552 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:01,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:01,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1984606347, now seen corresponding path program 1 times [2019-11-06 19:19:01,563 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:01,563 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239613761] [2019-11-06 19:19:01,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:01,917 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 19:19:01,918 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239613761] [2019-11-06 19:19:01,919 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:01,919 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:19:01,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896462552] [2019-11-06 19:19:01,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:01,927 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:01,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:01,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:19:01,944 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:19:07,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:07,081 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-11-06 19:19:07,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:19:07,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2019-11-06 19:19:07,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:07,118 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:19:07,119 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:19:07,128 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 19:19:07,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:19:07,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:19:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:19:07,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1666 transitions. [2019-11-06 19:19:07,267 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1666 transitions. Word has length 68 [2019-11-06 19:19:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:07,268 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1666 transitions. [2019-11-06 19:19:07,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1666 transitions. [2019-11-06 19:19:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-11-06 19:19:07,281 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:07,281 INFO L410 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 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 19:19:07,282 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:07,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:07,282 INFO L82 PathProgramCache]: Analyzing trace with hash -763824464, now seen corresponding path program 1 times [2019-11-06 19:19:07,282 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:07,282 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459055353] [2019-11-06 19:19:07,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 122 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:19:07,889 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459055353] [2019-11-06 19:19:07,890 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751260808] [2019-11-06 19:19:07,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:19:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:08,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:08,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-11-06 19:19:08,138 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:08,138 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-11-06 19:19:08,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881295824] [2019-11-06 19:19:08,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:08,141 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:08,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:08,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:19:08,142 INFO L87 Difference]: Start difference. First operand 1031 states and 1666 transitions. Second operand 5 states. [2019-11-06 19:19:13,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:13,465 INFO L93 Difference]: Finished difference Result 3131 states and 5147 transitions. [2019-11-06 19:19:13,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:19:13,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 235 [2019-11-06 19:19:13,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:13,480 INFO L225 Difference]: With dead ends: 3131 [2019-11-06 19:19:13,480 INFO L226 Difference]: Without dead ends: 2106 [2019-11-06 19:19:13,483 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:19:13,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-11-06 19:19:13,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2078. [2019-11-06 19:19:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2078 states. [2019-11-06 19:19:13,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3239 transitions. [2019-11-06 19:19:13,557 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3239 transitions. Word has length 235 [2019-11-06 19:19:13,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:13,558 INFO L462 AbstractCegarLoop]: Abstraction has 2078 states and 3239 transitions. [2019-11-06 19:19:13,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:13,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3239 transitions. [2019-11-06 19:19:13,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2019-11-06 19:19:13,563 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:13,564 INFO L410 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 19:19:13,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:13,772 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:13,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:13,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2017169816, now seen corresponding path program 1 times [2019-11-06 19:19:13,773 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:13,774 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919267244] [2019-11-06 19:19:13,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 122 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:19:14,144 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919267244] [2019-11-06 19:19:14,145 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791199813] [2019-11-06 19:19:14,145 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 19:19:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:14,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:14,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-11-06 19:19:14,444 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:14,444 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:19:14,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038582105] [2019-11-06 19:19:14,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:14,446 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:14,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:14,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:14,451 INFO L87 Difference]: Start difference. First operand 2078 states and 3239 transitions. Second operand 5 states. [2019-11-06 19:19:17,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:17,407 INFO L93 Difference]: Finished difference Result 6302 states and 10079 transitions. [2019-11-06 19:19:17,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:19:17,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 239 [2019-11-06 19:19:17,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:17,443 INFO L225 Difference]: With dead ends: 6302 [2019-11-06 19:19:17,444 INFO L226 Difference]: Without dead ends: 4230 [2019-11-06 19:19:17,452 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:19:17,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2019-11-06 19:19:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4208. [2019-11-06 19:19:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2019-11-06 19:19:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5868 transitions. [2019-11-06 19:19:17,610 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 5868 transitions. Word has length 239 [2019-11-06 19:19:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:17,610 INFO L462 AbstractCegarLoop]: Abstraction has 4208 states and 5868 transitions. [2019-11-06 19:19:17,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 5868 transitions. [2019-11-06 19:19:17,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2019-11-06 19:19:17,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:17,626 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:19:17,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:17,840 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:17,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:17,840 INFO L82 PathProgramCache]: Analyzing trace with hash -414007464, now seen corresponding path program 1 times [2019-11-06 19:19:17,840 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:17,841 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933307592] [2019-11-06 19:19:17,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 264 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 19:19:18,277 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933307592] [2019-11-06 19:19:18,278 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752470785] [2019-11-06 19:19:18,278 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 19:19:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:18,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:18,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 376 proven. 2 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-11-06 19:19:18,482 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:18,482 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-11-06 19:19:18,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26186741] [2019-11-06 19:19:18,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:19:18,484 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:18,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:19:18,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:18,485 INFO L87 Difference]: Start difference. First operand 4208 states and 5868 transitions. Second operand 11 states. [2019-11-06 19:19:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:23,612 INFO L93 Difference]: Finished difference Result 10864 states and 15768 transitions. [2019-11-06 19:19:23,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:19:23,613 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 334 [2019-11-06 19:19:23,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:23,657 INFO L225 Difference]: With dead ends: 10864 [2019-11-06 19:19:23,657 INFO L226 Difference]: Without dead ends: 6662 [2019-11-06 19:19:23,668 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 341 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:19:23,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2019-11-06 19:19:23,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 4930. [2019-11-06 19:19:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4930 states. [2019-11-06 19:19:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 6828 transitions. [2019-11-06 19:19:23,830 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 6828 transitions. Word has length 334 [2019-11-06 19:19:23,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:23,831 INFO L462 AbstractCegarLoop]: Abstraction has 4930 states and 6828 transitions. [2019-11-06 19:19:23,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:19:23,832 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 6828 transitions. [2019-11-06 19:19:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2019-11-06 19:19:23,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:23,843 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-11-06 19:19:24,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:24,047 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:24,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:24,048 INFO L82 PathProgramCache]: Analyzing trace with hash -166887632, now seen corresponding path program 1 times [2019-11-06 19:19:24,050 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:24,051 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498546366] [2019-11-06 19:19:24,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 183 proven. 197 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 19:19:24,594 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498546366] [2019-11-06 19:19:24,595 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940759365] [2019-11-06 19:19:24,595 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 19:19:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:24,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:24,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-11-06 19:19:25,083 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:25,084 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:19:25,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534389107] [2019-11-06 19:19:25,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:25,086 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:25,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:25,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:25,086 INFO L87 Difference]: Start difference. First operand 4930 states and 6828 transitions. Second operand 5 states. [2019-11-06 19:19:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:27,556 INFO L93 Difference]: Finished difference Result 11257 states and 15628 transitions. [2019-11-06 19:19:27,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:19:27,557 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 410 [2019-11-06 19:19:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:27,588 INFO L225 Difference]: With dead ends: 11257 [2019-11-06 19:19:27,589 INFO L226 Difference]: Without dead ends: 6333 [2019-11-06 19:19:27,606 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 412 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 19:19:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6333 states. [2019-11-06 19:19:27,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6333 to 6307. [2019-11-06 19:19:27,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6307 states. [2019-11-06 19:19:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6307 states to 6307 states and 8050 transitions. [2019-11-06 19:19:27,764 INFO L78 Accepts]: Start accepts. Automaton has 6307 states and 8050 transitions. Word has length 410 [2019-11-06 19:19:27,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:27,765 INFO L462 AbstractCegarLoop]: Abstraction has 6307 states and 8050 transitions. [2019-11-06 19:19:27,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:27,765 INFO L276 IsEmpty]: Start isEmpty. Operand 6307 states and 8050 transitions. [2019-11-06 19:19:27,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2019-11-06 19:19:27,780 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:27,781 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 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 19:19:27,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:27,988 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:27,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:27,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1197253196, now seen corresponding path program 1 times [2019-11-06 19:19:27,989 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:27,990 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183961981] [2019-11-06 19:19:27,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 299 proven. 91 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-06 19:19:28,733 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183961981] [2019-11-06 19:19:28,733 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225781602] [2019-11-06 19:19:28,733 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 19:19:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:28,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:28,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-11-06 19:19:29,087 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:29,087 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:19:29,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846551205] [2019-11-06 19:19:29,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:19:29,089 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:29,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:19:29,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:29,089 INFO L87 Difference]: Start difference. First operand 6307 states and 8050 transitions. Second operand 11 states.