/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_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:17:56,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:17:56,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:17:56,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:17:56,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:17:56,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:17:56,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:17:56,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:17:56,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:17:56,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:17:56,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:17:56,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:17:56,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:17:56,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:17:56,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:17:56,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:17:56,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:17:56,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:17:56,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:17:56,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:17:56,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:17:56,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:17:56,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:17:56,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:17:56,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:17:56,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:17:56,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:17:56,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:17:56,937 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 19:17:56,950 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:17:56,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:17:56,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:17:56,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:17:56,952 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:17:56,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:17:56,953 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:17:56,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:17:56,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:17:56,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:17:56,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:17:56,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:17:56,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:17:56,954 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:17:56,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:17:56,954 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:17:56,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:17:56,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:17:56,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:17:56,955 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:17:56,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:17:56,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:17:56,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:17:56,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:17:56,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:17:56,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:17:56,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:17:56,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:17:56,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:17:57,230 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:17:57,248 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:17:57,252 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:17:57,253 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:17:57,254 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:17:57,255 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label25.c [2019-11-06 19:17:57,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6765672/1c27dc6f735a425ea8c5d82e6207327b/FLAG7d752b2e3 [2019-11-06 19:17:57,994 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:17:57,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label25.c [2019-11-06 19:17:58,010 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6765672/1c27dc6f735a425ea8c5d82e6207327b/FLAG7d752b2e3 [2019-11-06 19:17:58,150 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6765672/1c27dc6f735a425ea8c5d82e6207327b [2019-11-06 19:17:58,158 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:17:58,160 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:17:58,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:58,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:17:58,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:17:58,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:58" (1/1) ... [2019-11-06 19:17:58,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c14a71e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:58, skipping insertion in model container [2019-11-06 19:17:58,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:58" (1/1) ... [2019-11-06 19:17:58,177 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:17:58,258 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:17:59,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:59,302 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:17:59,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:59,613 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:17:59,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:59 WrapperNode [2019-11-06 19:17:59,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:59,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:17:59,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:17:59,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:17:59,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:59" (1/1) ... [2019-11-06 19:17:59,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:59" (1/1) ... [2019-11-06 19:17:59,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:59" (1/1) ... [2019-11-06 19:17:59,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:59" (1/1) ... [2019-11-06 19:17:59,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:59" (1/1) ... [2019-11-06 19:17:59,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:59" (1/1) ... [2019-11-06 19:17:59,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:59" (1/1) ... [2019-11-06 19:17:59,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:17:59,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:17:59,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:17:59,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:17:59,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:59" (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 19:17:59,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:17:59,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:17:59,906 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:17:59,906 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:17:59,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:17:59,907 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:17:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:17:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:17:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:17:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:17:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:17:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:17:59,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:18:02,483 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:18:02,483 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:18:02,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:02 BoogieIcfgContainer [2019-11-06 19:18:02,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:18:02,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:18:02,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:18:02,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:18:02,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:17:58" (1/3) ... [2019-11-06 19:18:02,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22919bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:02, skipping insertion in model container [2019-11-06 19:18:02,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:59" (2/3) ... [2019-11-06 19:18:02,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22919bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:02, skipping insertion in model container [2019-11-06 19:18:02,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:02" (3/3) ... [2019-11-06 19:18:02,494 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label25.c [2019-11-06 19:18:02,504 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:18:02,514 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:18:02,529 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:18:02,568 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:18:02,568 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:18:02,568 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:18:02,568 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:18:02,568 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:18:02,569 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:18:02,569 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:18:02,569 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:18:02,604 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:18:02,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 19:18:02,615 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:02,616 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] [2019-11-06 19:18:02,618 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:02,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:02,624 INFO L82 PathProgramCache]: Analyzing trace with hash 134360965, now seen corresponding path program 1 times [2019-11-06 19:18:02,633 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:02,633 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493464378] [2019-11-06 19:18:02,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:03,035 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 19:18:03,036 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493464378] [2019-11-06 19:18:03,037 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:03,037 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:18:03,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599267070] [2019-11-06 19:18:03,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:03,046 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:03,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:03,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:18:03,063 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:18:08,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:08,266 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-11-06 19:18:08,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:18:08,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2019-11-06 19:18:08,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:08,294 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:18:08,295 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:18:08,308 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 19:18:08,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:18:08,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:18:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:18:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2019-11-06 19:18:08,418 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 56 [2019-11-06 19:18:08,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:08,419 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2019-11-06 19:18:08,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:08,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2019-11-06 19:18:08,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-11-06 19:18:08,434 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:08,435 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, 2, 2, 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] [2019-11-06 19:18:08,435 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:08,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:08,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1586256827, now seen corresponding path program 1 times [2019-11-06 19:18:08,436 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:08,436 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905061904] [2019-11-06 19:18:08,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 98 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:18:09,036 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905061904] [2019-11-06 19:18:09,037 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765998355] [2019-11-06 19:18:09,037 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 19:18:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:09,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:09,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-06 19:18:09,315 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:09,318 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-11-06 19:18:09,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175165430] [2019-11-06 19:18:09,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:09,321 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:09,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:09,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:18:09,321 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand 5 states. [2019-11-06 19:18:12,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:12,386 INFO L93 Difference]: Finished difference Result 3129 states and 5063 transitions. [2019-11-06 19:18:12,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:18:12,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 238 [2019-11-06 19:18:12,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:12,401 INFO L225 Difference]: With dead ends: 3129 [2019-11-06 19:18:12,401 INFO L226 Difference]: Without dead ends: 2104 [2019-11-06 19:18:12,405 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:12,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2019-11-06 19:18:12,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2083. [2019-11-06 19:18:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2019-11-06 19:18:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3187 transitions. [2019-11-06 19:18:12,475 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3187 transitions. Word has length 238 [2019-11-06 19:18:12,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:12,476 INFO L462 AbstractCegarLoop]: Abstraction has 2083 states and 3187 transitions. [2019-11-06 19:18:12,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:12,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3187 transitions. [2019-11-06 19:18:12,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-11-06 19:18:12,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:12,485 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, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:18:12,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:12,698 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:12,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:12,699 INFO L82 PathProgramCache]: Analyzing trace with hash -714713860, now seen corresponding path program 1 times [2019-11-06 19:18:12,699 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:12,699 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312418469] [2019-11-06 19:18:12,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 98 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:18:13,142 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312418469] [2019-11-06 19:18:13,143 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451557096] [2019-11-06 19:18:13,143 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 19:18:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:13,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:13,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-06 19:18:13,337 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:13,339 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:18:13,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807046029] [2019-11-06 19:18:13,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:13,341 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:13,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:13,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:13,342 INFO L87 Difference]: Start difference. First operand 2083 states and 3187 transitions. Second operand 5 states. [2019-11-06 19:18:16,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:16,122 INFO L93 Difference]: Finished difference Result 6311 states and 9954 transitions. [2019-11-06 19:18:16,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:18:16,123 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 273 [2019-11-06 19:18:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:16,148 INFO L225 Difference]: With dead ends: 6311 [2019-11-06 19:18:16,148 INFO L226 Difference]: Without dead ends: 4234 [2019-11-06 19:18:16,155 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:18:16,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2019-11-06 19:18:16,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4198. [2019-11-06 19:18:16,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2019-11-06 19:18:16,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5791 transitions. [2019-11-06 19:18:16,298 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5791 transitions. Word has length 273 [2019-11-06 19:18:16,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:16,301 INFO L462 AbstractCegarLoop]: Abstraction has 4198 states and 5791 transitions. [2019-11-06 19:18:16,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:16,302 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5791 transitions. [2019-11-06 19:18:16,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-11-06 19:18:16,309 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:16,309 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:18:16,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:16,513 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:16,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:16,514 INFO L82 PathProgramCache]: Analyzing trace with hash -628993500, now seen corresponding path program 1 times [2019-11-06 19:18:16,514 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:16,514 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008313576] [2019-11-06 19:18:16,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 19:18:16,951 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008313576] [2019-11-06 19:18:16,951 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447070787] [2019-11-06 19:18:16,952 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 19:18:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:17,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:17,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:17,208 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:17,208 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 19:18:17,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949057865] [2019-11-06 19:18:17,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:18:17,209 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:17,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:18:17,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:17,210 INFO L87 Difference]: Start difference. First operand 4198 states and 5791 transitions. Second operand 12 states. [2019-11-06 19:18:24,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:24,414 INFO L93 Difference]: Finished difference Result 13272 states and 19292 transitions. [2019-11-06 19:18:24,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 19:18:24,415 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 285 [2019-11-06 19:18:24,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:24,451 INFO L225 Difference]: With dead ends: 13272 [2019-11-06 19:18:24,451 INFO L226 Difference]: Without dead ends: 7642 [2019-11-06 19:18:24,467 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 293 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:18:24,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2019-11-06 19:18:24,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 5899. [2019-11-06 19:18:24,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5899 states. [2019-11-06 19:18:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5899 states to 5899 states and 6784 transitions. [2019-11-06 19:18:24,631 INFO L78 Accepts]: Start accepts. Automaton has 5899 states and 6784 transitions. Word has length 285 [2019-11-06 19:18:24,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:24,633 INFO L462 AbstractCegarLoop]: Abstraction has 5899 states and 6784 transitions. [2019-11-06 19:18:24,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:18:24,634 INFO L276 IsEmpty]: Start isEmpty. Operand 5899 states and 6784 transitions. [2019-11-06 19:18:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2019-11-06 19:18:24,651 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:24,651 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2019-11-06 19:18:24,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:24,856 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:24,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:24,857 INFO L82 PathProgramCache]: Analyzing trace with hash 797362899, now seen corresponding path program 1 times [2019-11-06 19:18:24,857 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:24,858 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721838373] [2019-11-06 19:18:24,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 196 proven. 345 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2019-11-06 19:18:25,644 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721838373] [2019-11-06 19:18:25,644 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450420162] [2019-11-06 19:18:25,644 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 19:18:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:25,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:25,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 406 proven. 0 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2019-11-06 19:18:26,090 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:26,090 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:18:26,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97005820] [2019-11-06 19:18:26,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:26,091 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:26,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:26,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:26,092 INFO L87 Difference]: Start difference. First operand 5899 states and 6784 transitions. Second operand 5 states. [2019-11-06 19:18:27,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:27,855 INFO L93 Difference]: Finished difference Result 13172 states and 15172 transitions. [2019-11-06 19:18:27,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:18:27,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 554 [2019-11-06 19:18:27,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:27,881 INFO L225 Difference]: With dead ends: 13172 [2019-11-06 19:18:27,882 INFO L226 Difference]: Without dead ends: 7279 [2019-11-06 19:18:27,894 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 558 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 19:18:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7279 states. [2019-11-06 19:18:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7279 to 7261. [2019-11-06 19:18:28,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7261 states. [2019-11-06 19:18:28,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7261 states to 7261 states and 8075 transitions. [2019-11-06 19:18:28,047 INFO L78 Accepts]: Start accepts. Automaton has 7261 states and 8075 transitions. Word has length 554 [2019-11-06 19:18:28,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:28,048 INFO L462 AbstractCegarLoop]: Abstraction has 7261 states and 8075 transitions. [2019-11-06 19:18:28,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:28,048 INFO L276 IsEmpty]: Start isEmpty. Operand 7261 states and 8075 transitions. [2019-11-06 19:18:28,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2019-11-06 19:18:28,085 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:28,086 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:28,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:28,290 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:28,291 INFO L82 PathProgramCache]: Analyzing trace with hash -543608489, now seen corresponding path program 1 times [2019-11-06 19:18:28,291 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:28,291 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637230814] [2019-11-06 19:18:28,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 316 proven. 221 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2019-11-06 19:18:29,541 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637230814] [2019-11-06 19:18:29,541 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405712063] [2019-11-06 19:18:29,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:29,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:29,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 682 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-06 19:18:30,193 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:30,194 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:18:30,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799094509] [2019-11-06 19:18:30,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:18:30,196 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:30,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:18:30,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:30,197 INFO L87 Difference]: Start difference. First operand 7261 states and 8075 transitions. Second operand 11 states.