/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_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:19:00,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:19:00,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:19:00,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:19:00,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:19:00,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:19:00,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:19:00,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:19:00,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:19:00,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:19:00,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:19:00,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:19:00,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:19:00,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:19:00,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:19:00,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:19:00,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:19:00,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:19:00,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:19:00,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:19:00,458 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 19:19:00,476 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:19:00,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:19:00,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:19:00,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:19:00,479 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:19:00,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:19:00,479 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:19:00,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:19:00,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:19:00,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:19:00,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:19:00,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:19:00,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:19:00,482 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:19:00,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:19:00,482 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:19:00,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:19:00,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:19:00,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:19:00,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:19:00,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:19:00,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:19:00,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:19:00,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:19:00,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:19:00,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:19:00,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:19:00,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:19:00,485 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:19:00,744 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:19:00,762 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:19:00,766 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:19:00,767 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:19:00,767 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:19:00,768 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label48.c [2019-11-06 19:19:00,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eeef257f/5f089c3599db40e4a3c523a8fd3995bb/FLAG823e4b138 [2019-11-06 19:19:01,525 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:19:01,528 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label48.c [2019-11-06 19:19:01,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eeef257f/5f089c3599db40e4a3c523a8fd3995bb/FLAG823e4b138 [2019-11-06 19:19:01,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eeef257f/5f089c3599db40e4a3c523a8fd3995bb [2019-11-06 19:19:01,698 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:19:01,699 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:19:01,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:01,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:19:01,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:19:01,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:01" (1/1) ... [2019-11-06 19:19:01,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56069b0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:01, skipping insertion in model container [2019-11-06 19:19:01,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:01" (1/1) ... [2019-11-06 19:19:01,717 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:19:01,795 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:19:02,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:02,760 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:19:03,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:03,029 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:19:03,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03 WrapperNode [2019-11-06 19:19:03,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:03,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:19:03,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:19:03,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:19:03,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (1/1) ... [2019-11-06 19:19:03,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (1/1) ... [2019-11-06 19:19:03,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (1/1) ... [2019-11-06 19:19:03,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (1/1) ... [2019-11-06 19:19:03,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (1/1) ... [2019-11-06 19:19:03,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (1/1) ... [2019-11-06 19:19:03,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (1/1) ... [2019-11-06 19:19:03,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:19:03,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:19:03,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:19:03,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:19:03,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (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 19:19:03,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:19:03,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:19:03,263 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:19:03,263 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:19:03,263 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:19:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:19:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:19:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:19:03,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:19:03,264 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:19:03,264 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:19:03,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:19:03,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:19:05,633 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:19:05,633 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:19:05,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:05 BoogieIcfgContainer [2019-11-06 19:19:05,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:19:05,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:19:05,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:19:05,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:19:05,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:19:01" (1/3) ... [2019-11-06 19:19:05,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81a1d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:05, skipping insertion in model container [2019-11-06 19:19:05,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:03" (2/3) ... [2019-11-06 19:19:05,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81a1d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:05, skipping insertion in model container [2019-11-06 19:19:05,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:05" (3/3) ... [2019-11-06 19:19:05,644 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label48.c [2019-11-06 19:19:05,654 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:19:05,664 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:19:05,676 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:19:05,712 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:19:05,712 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:19:05,712 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:19:05,712 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:19:05,712 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:19:05,712 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:19:05,713 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:19:05,713 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:19:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:19:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-06 19:19:05,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:05,760 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, 1, 1] [2019-11-06 19:19:05,762 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:05,768 INFO L82 PathProgramCache]: Analyzing trace with hash -241070563, now seen corresponding path program 1 times [2019-11-06 19:19:05,777 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:05,777 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052929731] [2019-11-06 19:19:05,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:06,273 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 19:19:06,274 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052929731] [2019-11-06 19:19:06,274 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:06,275 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:19:06,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689508772] [2019-11-06 19:19:06,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:06,285 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:06,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:06,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:19:06,309 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:19:11,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:11,717 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-11-06 19:19:11,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:19:11,719 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2019-11-06 19:19:11,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:11,746 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:19:11,746 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:19:11,758 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 19:19:11,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:19:11,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:19:11,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:19:11,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1619 transitions. [2019-11-06 19:19:11,879 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1619 transitions. Word has length 70 [2019-11-06 19:19:11,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:11,880 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1619 transitions. [2019-11-06 19:19:11,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:11,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1619 transitions. [2019-11-06 19:19:11,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-06 19:19:11,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:11,890 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:19:11,890 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:11,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:11,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1544489621, now seen corresponding path program 1 times [2019-11-06 19:19:11,891 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:11,891 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844307068] [2019-11-06 19:19:11,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:19:12,248 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844307068] [2019-11-06 19:19:12,249 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:12,249 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:19:12,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453154097] [2019-11-06 19:19:12,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:19:12,255 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:12,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:19:12,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:19:12,255 INFO L87 Difference]: Start difference. First operand 1031 states and 1619 transitions. Second operand 9 states. [2019-11-06 19:19:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:16,649 INFO L93 Difference]: Finished difference Result 3118 states and 4964 transitions. [2019-11-06 19:19:16,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:19:16,650 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 153 [2019-11-06 19:19:16,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:16,665 INFO L225 Difference]: With dead ends: 3118 [2019-11-06 19:19:16,665 INFO L226 Difference]: Without dead ends: 2093 [2019-11-06 19:19:16,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:19:16,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2019-11-06 19:19:16,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2075. [2019-11-06 19:19:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2075 states. [2019-11-06 19:19:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 2956 transitions. [2019-11-06 19:19:16,746 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 2956 transitions. Word has length 153 [2019-11-06 19:19:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:16,747 INFO L462 AbstractCegarLoop]: Abstraction has 2075 states and 2956 transitions. [2019-11-06 19:19:16,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:19:16,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 2956 transitions. [2019-11-06 19:19:16,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-06 19:19:16,752 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:16,752 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:19:16,753 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:16,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:16,753 INFO L82 PathProgramCache]: Analyzing trace with hash -258818048, now seen corresponding path program 1 times [2019-11-06 19:19:16,753 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:16,754 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407356053] [2019-11-06 19:19:16,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 19:19:17,048 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407356053] [2019-11-06 19:19:17,048 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574876437] [2019-11-06 19:19:17,049 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 19:19:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:17,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:17,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:19:17,303 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:17,304 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-11-06 19:19:17,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007511483] [2019-11-06 19:19:17,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:19:17,315 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:17,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:19:17,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:19:17,317 INFO L87 Difference]: Start difference. First operand 2075 states and 2956 transitions. Second operand 3 states. [2019-11-06 19:19:18,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:18,862 INFO L93 Difference]: Finished difference Result 3102 states and 4277 transitions. [2019-11-06 19:19:18,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:19:18,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2019-11-06 19:19:18,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:18,880 INFO L225 Difference]: With dead ends: 3102 [2019-11-06 19:19:18,880 INFO L226 Difference]: Without dead ends: 3100 [2019-11-06 19:19:18,882 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 171 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:19:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2019-11-06 19:19:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2755. [2019-11-06 19:19:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2755 states. [2019-11-06 19:19:18,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 3884 transitions. [2019-11-06 19:19:18,961 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 3884 transitions. Word has length 170 [2019-11-06 19:19:18,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:18,962 INFO L462 AbstractCegarLoop]: Abstraction has 2755 states and 3884 transitions. [2019-11-06 19:19:18,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:19:18,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 3884 transitions. [2019-11-06 19:19:18,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-11-06 19:19:18,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:18,968 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, 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, 1, 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 19:19:19,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:19,172 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:19,173 INFO L82 PathProgramCache]: Analyzing trace with hash -61464174, now seen corresponding path program 1 times [2019-11-06 19:19:19,173 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:19,173 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454398030] [2019-11-06 19:19:19,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 220 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 19:19:19,691 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454398030] [2019-11-06 19:19:19,691 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470094069] [2019-11-06 19:19:19,691 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 19:19:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:19,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:19,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 224 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:19:19,932 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:19,932 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 19:19:19,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965904249] [2019-11-06 19:19:19,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:19:19,936 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:19,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:19:19,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:19:19,936 INFO L87 Difference]: Start difference. First operand 2755 states and 3884 transitions. Second operand 12 states. [2019-11-06 19:19:26,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:26,359 INFO L93 Difference]: Finished difference Result 7991 states and 11355 transitions. [2019-11-06 19:19:26,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 19:19:26,360 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 285 [2019-11-06 19:19:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:26,388 INFO L225 Difference]: With dead ends: 7991 [2019-11-06 19:19:26,388 INFO L226 Difference]: Without dead ends: 5242 [2019-11-06 19:19:26,395 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 292 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:19:26,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2019-11-06 19:19:26,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 4510. [2019-11-06 19:19:26,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4510 states. [2019-11-06 19:19:26,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 5583 transitions. [2019-11-06 19:19:26,521 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 5583 transitions. Word has length 285 [2019-11-06 19:19:26,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:26,523 INFO L462 AbstractCegarLoop]: Abstraction has 4510 states and 5583 transitions. [2019-11-06 19:19:26,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:19:26,523 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 5583 transitions. [2019-11-06 19:19:26,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2019-11-06 19:19:26,543 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:26,543 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:19:26,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:26,748 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:26,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:26,749 INFO L82 PathProgramCache]: Analyzing trace with hash 566728298, now seen corresponding path program 1 times [2019-11-06 19:19:26,749 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:26,750 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371436343] [2019-11-06 19:19:26,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 583 proven. 2 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2019-11-06 19:19:27,574 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371436343] [2019-11-06 19:19:27,574 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266630144] [2019-11-06 19:19:27,574 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 19:19:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:27,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:27,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 586 proven. 2 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2019-11-06 19:19:28,016 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:28,017 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:19:28,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306951168] [2019-11-06 19:19:28,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:19:28,018 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:28,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:19:28,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:28,019 INFO L87 Difference]: Start difference. First operand 4510 states and 5583 transitions. Second operand 11 states. [2019-11-06 19:19:33,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:33,644 INFO L93 Difference]: Finished difference Result 10080 states and 12704 transitions. [2019-11-06 19:19:33,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 19:19:33,652 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 639 [2019-11-06 19:19:33,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:33,674 INFO L225 Difference]: With dead ends: 10080 [2019-11-06 19:19:33,674 INFO L226 Difference]: Without dead ends: 5576 [2019-11-06 19:19:33,683 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:19:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2019-11-06 19:19:33,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 5560. [2019-11-06 19:19:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5560 states. [2019-11-06 19:19:33,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 6810 transitions. [2019-11-06 19:19:33,790 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 6810 transitions. Word has length 639 [2019-11-06 19:19:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:33,791 INFO L462 AbstractCegarLoop]: Abstraction has 5560 states and 6810 transitions. [2019-11-06 19:19:33,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:19:33,791 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 6810 transitions. [2019-11-06 19:19:33,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2019-11-06 19:19:33,810 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:33,811 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:19:34,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:34,017 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:34,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:34,017 INFO L82 PathProgramCache]: Analyzing trace with hash -64568860, now seen corresponding path program 1 times [2019-11-06 19:19:34,017 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:34,018 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346264004] [2019-11-06 19:19:34,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 319 proven. 20 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2019-11-06 19:19:34,831 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346264004] [2019-11-06 19:19:34,832 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710700975] [2019-11-06 19:19:34,832 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 19:19:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:35,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:35,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 327 proven. 0 refuted. 0 times theorem prover too weak. 927 trivial. 0 not checked. [2019-11-06 19:19:35,562 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:35,562 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-06 19:19:35,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082847381] [2019-11-06 19:19:35,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:19:35,564 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:35,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:19:35,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:19:35,565 INFO L87 Difference]: Start difference. First operand 5560 states and 6810 transitions. Second operand 3 states.