/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_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:19:05,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:19:05,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:19:05,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:19:05,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:19:05,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:19:05,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:19:05,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:19:05,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:19:05,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:19:05,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:19:05,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:19:05,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:19:05,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:19:05,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:19:05,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:19:05,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:19:05,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:19:05,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:19:05,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:19:05,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:19:05,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:19:05,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:19:05,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:19:05,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:19:05,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:19:05,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:19:05,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:19:05,679 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 19:19:05,699 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:19:05,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:19:05,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:19:05,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:19:05,701 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:19:05,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:19:05,702 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:19:05,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:19:05,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:19:05,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:19:05,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:19:05,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:19:05,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:19:05,703 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:19:05,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:19:05,704 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:19:05,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:19:05,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:19:05,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:19:05,704 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:19:05,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:19:05,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:19:05,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:19:05,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:19:05,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:19:05,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:19:05,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:19:05,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:19:05,706 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:19:05,981 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:19:05,998 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:19:06,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:19:06,004 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:19:06,004 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:19:06,005 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label53.c [2019-11-06 19:19:06,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1005688b4/afcb245280154c25beab539f12f8abef/FLAG32ea8e99c [2019-11-06 19:19:06,715 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:19:06,716 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label53.c [2019-11-06 19:19:06,737 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1005688b4/afcb245280154c25beab539f12f8abef/FLAG32ea8e99c [2019-11-06 19:19:06,909 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1005688b4/afcb245280154c25beab539f12f8abef [2019-11-06 19:19:06,919 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:19:06,921 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:19:06,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:06,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:19:06,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:19:06,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:06" (1/1) ... [2019-11-06 19:19:06,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2406b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:06, skipping insertion in model container [2019-11-06 19:19:06,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:06" (1/1) ... [2019-11-06 19:19:06,938 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:19:07,022 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:19:07,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:07,909 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:19:08,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:08,275 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:19:08,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:08 WrapperNode [2019-11-06 19:19:08,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:08,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:19:08,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:19:08,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:19:08,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:08" (1/1) ... [2019-11-06 19:19:08,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:08" (1/1) ... [2019-11-06 19:19:08,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:08" (1/1) ... [2019-11-06 19:19:08,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:08" (1/1) ... [2019-11-06 19:19:08,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:08" (1/1) ... [2019-11-06 19:19:08,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:08" (1/1) ... [2019-11-06 19:19:08,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:08" (1/1) ... [2019-11-06 19:19:08,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:19:08,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:19:08,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:19:08,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:19:08,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:08" (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 19:19:08,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:19:08,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:19:08,544 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:19:08,544 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:19:08,544 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:19:08,544 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:19:08,544 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:19:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:19:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:19:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:19:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:19:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:19:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:19:10,773 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:19:10,774 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:19:10,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:10 BoogieIcfgContainer [2019-11-06 19:19:10,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:19:10,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:19:10,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:19:10,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:19:10,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:19:06" (1/3) ... [2019-11-06 19:19:10,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa38b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:10, skipping insertion in model container [2019-11-06 19:19:10,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:08" (2/3) ... [2019-11-06 19:19:10,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa38b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:10, skipping insertion in model container [2019-11-06 19:19:10,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:10" (3/3) ... [2019-11-06 19:19:10,793 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label53.c [2019-11-06 19:19:10,807 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:19:10,819 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:19:10,831 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:19:10,878 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:19:10,879 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:19:10,879 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:19:10,879 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:19:10,879 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:19:10,879 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:19:10,879 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:19:10,880 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:19:10,915 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:19:10,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 19:19:10,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:10,925 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] [2019-11-06 19:19:10,927 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:10,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:10,934 INFO L82 PathProgramCache]: Analyzing trace with hash -302324190, now seen corresponding path program 1 times [2019-11-06 19:19:10,943 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:10,943 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088844486] [2019-11-06 19:19:10,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:11,373 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 19:19:11,374 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088844486] [2019-11-06 19:19:11,374 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:11,375 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:19:11,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14873175] [2019-11-06 19:19:11,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:11,383 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:11,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:11,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:19:11,401 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:19:16,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:16,344 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-11-06 19:19:16,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:19:16,346 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2019-11-06 19:19:16,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:16,374 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:19:16,375 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:19:16,386 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 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 19:19:16,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:19:16,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:19:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:19:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1619 transitions. [2019-11-06 19:19:16,517 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1619 transitions. Word has length 43 [2019-11-06 19:19:16,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:16,518 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1619 transitions. [2019-11-06 19:19:16,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:16,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1619 transitions. [2019-11-06 19:19:16,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-06 19:19:16,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:16,530 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:19:16,530 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:16,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1581366797, now seen corresponding path program 1 times [2019-11-06 19:19:16,532 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:16,532 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810022786] [2019-11-06 19:19:16,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:19:17,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810022786] [2019-11-06 19:19:17,032 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:17,032 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:19:17,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236270641] [2019-11-06 19:19:17,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:19:17,035 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:17,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:19:17,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:19:17,036 INFO L87 Difference]: Start difference. First operand 1031 states and 1619 transitions. Second operand 9 states. [2019-11-06 19:19:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:21,377 INFO L93 Difference]: Finished difference Result 3125 states and 5015 transitions. [2019-11-06 19:19:21,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:19:21,378 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-11-06 19:19:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:21,399 INFO L225 Difference]: With dead ends: 3125 [2019-11-06 19:19:21,400 INFO L226 Difference]: Without dead ends: 2100 [2019-11-06 19:19:21,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:19:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-11-06 19:19:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2069. [2019-11-06 19:19:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2069 states. [2019-11-06 19:19:21,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3146 transitions. [2019-11-06 19:19:21,510 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3146 transitions. Word has length 178 [2019-11-06 19:19:21,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:21,513 INFO L462 AbstractCegarLoop]: Abstraction has 2069 states and 3146 transitions. [2019-11-06 19:19:21,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:19:21,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3146 transitions. [2019-11-06 19:19:21,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-11-06 19:19:21,526 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:21,526 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:19:21,526 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:21,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1384968958, now seen corresponding path program 1 times [2019-11-06 19:19:21,528 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:21,528 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129517190] [2019-11-06 19:19:21,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:19:21,907 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129517190] [2019-11-06 19:19:21,908 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74524164] [2019-11-06 19:19:21,908 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 19:19:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:22,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:22,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 19:19:22,202 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:22,202 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:19:22,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743889546] [2019-11-06 19:19:22,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:22,204 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:22,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:22,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:22,205 INFO L87 Difference]: Start difference. First operand 2069 states and 3146 transitions. Second operand 5 states. [2019-11-06 19:19:25,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:25,454 INFO L93 Difference]: Finished difference Result 5192 states and 7967 transitions. [2019-11-06 19:19:25,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:19:25,463 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 213 [2019-11-06 19:19:25,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:25,485 INFO L225 Difference]: With dead ends: 5192 [2019-11-06 19:19:25,485 INFO L226 Difference]: Without dead ends: 3129 [2019-11-06 19:19:25,492 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 213 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 19:19:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2019-11-06 19:19:25,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3097. [2019-11-06 19:19:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3097 states. [2019-11-06 19:19:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 3988 transitions. [2019-11-06 19:19:25,593 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 3988 transitions. Word has length 213 [2019-11-06 19:19:25,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:25,594 INFO L462 AbstractCegarLoop]: Abstraction has 3097 states and 3988 transitions. [2019-11-06 19:19:25,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:25,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 3988 transitions. [2019-11-06 19:19:25,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2019-11-06 19:19:25,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:25,601 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:19:25,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:25,805 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:25,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:25,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1371980027, now seen corresponding path program 1 times [2019-11-06 19:19:25,805 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:25,806 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682058244] [2019-11-06 19:19:25,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 19:19:26,338 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682058244] [2019-11-06 19:19:26,338 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996554430] [2019-11-06 19:19:26,338 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 19:19:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:26,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:26,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 304 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 19:19:26,658 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:26,658 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:19:26,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447010242] [2019-11-06 19:19:26,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:19:26,660 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:26,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:19:26,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:26,661 INFO L87 Difference]: Start difference. First operand 3097 states and 3988 transitions. Second operand 11 states. [2019-11-06 19:19:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:34,312 INFO L93 Difference]: Finished difference Result 10419 states and 14042 transitions. [2019-11-06 19:19:34,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 19:19:34,315 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 322 [2019-11-06 19:19:34,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:34,356 INFO L225 Difference]: With dead ends: 10419 [2019-11-06 19:19:34,356 INFO L226 Difference]: Without dead ends: 6317 [2019-11-06 19:19:34,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:19:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2019-11-06 19:19:34,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 6275. [2019-11-06 19:19:34,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6275 states. [2019-11-06 19:19:34,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6275 states to 6275 states and 7952 transitions. [2019-11-06 19:19:34,573 INFO L78 Accepts]: Start accepts. Automaton has 6275 states and 7952 transitions. Word has length 322 [2019-11-06 19:19:34,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:34,574 INFO L462 AbstractCegarLoop]: Abstraction has 6275 states and 7952 transitions. [2019-11-06 19:19:34,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:19:34,576 INFO L276 IsEmpty]: Start isEmpty. Operand 6275 states and 7952 transitions. [2019-11-06 19:19:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2019-11-06 19:19:34,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:34,596 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:19:34,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:34,801 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:34,802 INFO L82 PathProgramCache]: Analyzing trace with hash 102017770, now seen corresponding path program 1 times [2019-11-06 19:19:34,802 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:34,803 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127642961] [2019-11-06 19:19:34,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 200 proven. 115 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 19:19:35,702 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127642961] [2019-11-06 19:19:35,702 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545722341] [2019-11-06 19:19:35,702 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 19:19:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:35,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:35,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 367 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 19:19:36,178 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:36,179 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:19:36,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287598210] [2019-11-06 19:19:36,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:19:36,181 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:36,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:19:36,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:36,181 INFO L87 Difference]: Start difference. First operand 6275 states and 7952 transitions. Second operand 11 states. [2019-11-06 19:19:41,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:41,820 INFO L93 Difference]: Finished difference Result 14003 states and 18478 transitions. [2019-11-06 19:19:41,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:19:41,821 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 523 [2019-11-06 19:19:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:41,857 INFO L225 Difference]: With dead ends: 14003 [2019-11-06 19:19:41,857 INFO L226 Difference]: Without dead ends: 7351 [2019-11-06 19:19:41,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-11-06 19:19:41,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2019-11-06 19:19:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 7313. [2019-11-06 19:19:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7313 states. [2019-11-06 19:19:42,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7313 states to 7313 states and 8292 transitions. [2019-11-06 19:19:42,064 INFO L78 Accepts]: Start accepts. Automaton has 7313 states and 8292 transitions. Word has length 523 [2019-11-06 19:19:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:42,065 INFO L462 AbstractCegarLoop]: Abstraction has 7313 states and 8292 transitions. [2019-11-06 19:19:42,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:19:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 7313 states and 8292 transitions. [2019-11-06 19:19:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2019-11-06 19:19:42,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:42,098 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 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 19:19:42,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:42,302 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:42,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:42,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1181249610, now seen corresponding path program 1 times [2019-11-06 19:19:42,303 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:42,304 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595348695] [2019-11-06 19:19:42,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1862 backedges. 329 proven. 460 refuted. 0 times theorem prover too weak. 1073 trivial. 0 not checked. [2019-11-06 19:19:43,694 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595348695] [2019-11-06 19:19:43,694 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452856750] [2019-11-06 19:19:43,695 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 19:19:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:43,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:43,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1862 backedges. 1316 proven. 2 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-11-06 19:19:44,259 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:44,260 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 19:19:44,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134331073] [2019-11-06 19:19:44,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:19:44,262 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:44,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:19:44,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:19:44,263 INFO L87 Difference]: Start difference. First operand 7313 states and 8292 transitions. Second operand 12 states.