/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_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:17:07,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:17:07,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:17:07,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:17:07,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:17:07,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:17:07,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:17:07,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:17:07,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:17:07,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:17:07,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:17:07,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:17:07,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:17:07,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:17:07,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:17:07,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:17:07,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:17:07,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:17:07,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:17:07,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:17:07,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:17:07,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:17:07,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:17:07,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:17:07,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:17:07,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:17:07,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:17:07,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:17:07,521 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 19:17:07,534 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:17:07,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:17:07,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:17:07,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:17:07,536 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:17:07,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:17:07,537 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:17:07,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:17:07,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:17:07,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:17:07,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:17:07,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:17:07,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:17:07,538 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:17:07,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:17:07,538 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:17:07,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:17:07,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:17:07,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:17:07,539 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:17:07,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:17:07,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:17:07,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:17:07,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:17:07,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:17:07,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:17:07,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:17:07,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:17:07,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:17:07,802 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:17:07,822 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:17:07,827 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:17:07,828 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:17:07,829 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:17:07,830 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label11.c [2019-11-06 19:17:07,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47c459600/34918614f64341a486375df2889b0948/FLAGd5bbfb4d6 [2019-11-06 19:17:08,565 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:17:08,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label11.c [2019-11-06 19:17:08,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47c459600/34918614f64341a486375df2889b0948/FLAGd5bbfb4d6 [2019-11-06 19:17:08,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47c459600/34918614f64341a486375df2889b0948 [2019-11-06 19:17:08,772 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:17:08,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:17:08,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:08,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:17:08,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:17:08,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:08" (1/1) ... [2019-11-06 19:17:08,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e7cb3bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:08, skipping insertion in model container [2019-11-06 19:17:08,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:08" (1/1) ... [2019-11-06 19:17:08,789 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:17:08,858 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:17:09,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:09,653 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:17:09,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:09,923 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:17:09,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:09 WrapperNode [2019-11-06 19:17:09,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:09,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:17:09,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:17:09,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:17:09,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:09" (1/1) ... [2019-11-06 19:17:09,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:09" (1/1) ... [2019-11-06 19:17:09,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:09" (1/1) ... [2019-11-06 19:17:09,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:09" (1/1) ... [2019-11-06 19:17:10,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:09" (1/1) ... [2019-11-06 19:17:10,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:09" (1/1) ... [2019-11-06 19:17:10,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:09" (1/1) ... [2019-11-06 19:17:10,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:17:10,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:17:10,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:17:10,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:17:10,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:09" (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 19:17:10,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:17:10,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:17:10,229 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:17:10,229 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:17:10,230 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:17:10,231 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:17:10,231 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:17:10,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:17:10,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:17:10,232 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:17:10,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:17:10,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:17:10,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:17:12,904 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:17:12,908 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:17:12,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:12 BoogieIcfgContainer [2019-11-06 19:17:12,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:17:12,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:17:12,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:17:12,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:17:12,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:17:08" (1/3) ... [2019-11-06 19:17:12,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7950cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:12, skipping insertion in model container [2019-11-06 19:17:12,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:09" (2/3) ... [2019-11-06 19:17:12,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7950cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:12, skipping insertion in model container [2019-11-06 19:17:12,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:12" (3/3) ... [2019-11-06 19:17:12,924 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label11.c [2019-11-06 19:17:12,937 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:17:12,947 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:17:12,959 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:17:13,003 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:17:13,004 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:17:13,004 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:17:13,004 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:17:13,004 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:17:13,004 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:17:13,004 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:17:13,005 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:17:13,042 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:17:13,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 19:17:13,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:13,055 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:17:13,057 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:13,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:13,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1003051062, now seen corresponding path program 1 times [2019-11-06 19:17:13,072 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:13,072 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408369] [2019-11-06 19:17:13,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:13,428 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 19:17:13,429 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408369] [2019-11-06 19:17:13,430 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:13,430 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:17:13,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012683333] [2019-11-06 19:17:13,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:17:13,439 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:13,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:17:13,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:17:13,456 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:17:18,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:18,842 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-11-06 19:17:18,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:17:18,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-11-06 19:17:18,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:18,880 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:17:18,881 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:17:18,895 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 19:17:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:17:19,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:17:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:17:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1619 transitions. [2019-11-06 19:17:19,039 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1619 transitions. Word has length 61 [2019-11-06 19:17:19,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:19,040 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1619 transitions. [2019-11-06 19:17:19,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:17:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1619 transitions. [2019-11-06 19:17:19,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-11-06 19:17:19,048 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:19,050 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:19,050 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:19,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:19,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1732161147, now seen corresponding path program 1 times [2019-11-06 19:17:19,051 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:19,051 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153020001] [2019-11-06 19:17:19,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:19,569 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153020001] [2019-11-06 19:17:19,570 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:19,570 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:17:19,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609472655] [2019-11-06 19:17:19,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:17:19,572 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:19,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:17:19,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:17:19,573 INFO L87 Difference]: Start difference. First operand 1031 states and 1619 transitions. Second operand 9 states. [2019-11-06 19:17:23,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:23,703 INFO L93 Difference]: Finished difference Result 3125 states and 5015 transitions. [2019-11-06 19:17:23,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:17:23,705 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 196 [2019-11-06 19:17:23,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:23,724 INFO L225 Difference]: With dead ends: 3125 [2019-11-06 19:17:23,724 INFO L226 Difference]: Without dead ends: 2100 [2019-11-06 19:17:23,728 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 19:17:23,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-11-06 19:17:23,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2069. [2019-11-06 19:17:23,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2069 states. [2019-11-06 19:17:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3146 transitions. [2019-11-06 19:17:23,820 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3146 transitions. Word has length 196 [2019-11-06 19:17:23,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:23,821 INFO L462 AbstractCegarLoop]: Abstraction has 2069 states and 3146 transitions. [2019-11-06 19:17:23,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:17:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3146 transitions. [2019-11-06 19:17:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-11-06 19:17:23,828 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:23,828 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:17:23,828 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:23,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:23,829 INFO L82 PathProgramCache]: Analyzing trace with hash -801492122, now seen corresponding path program 1 times [2019-11-06 19:17:23,829 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:23,829 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359650589] [2019-11-06 19:17:23,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 108 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:17:24,170 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359650589] [2019-11-06 19:17:24,171 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588598397] [2019-11-06 19:17:24,171 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 19:17:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:24,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:17:24,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 19:17:24,464 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:17:24,464 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:17:24,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723273243] [2019-11-06 19:17:24,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:17:24,466 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:24,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:17:24,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:17:24,466 INFO L87 Difference]: Start difference. First operand 2069 states and 3146 transitions. Second operand 5 states. [2019-11-06 19:17:27,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:27,152 INFO L93 Difference]: Finished difference Result 5192 states and 7967 transitions. [2019-11-06 19:17:27,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:17:27,154 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 231 [2019-11-06 19:17:27,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:27,193 INFO L225 Difference]: With dead ends: 5192 [2019-11-06 19:17:27,193 INFO L226 Difference]: Without dead ends: 3129 [2019-11-06 19:17:27,198 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 231 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 19:17:27,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2019-11-06 19:17:27,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3097. [2019-11-06 19:17:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3097 states. [2019-11-06 19:17:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 3988 transitions. [2019-11-06 19:17:27,299 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 3988 transitions. Word has length 231 [2019-11-06 19:17:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:27,300 INFO L462 AbstractCegarLoop]: Abstraction has 3097 states and 3988 transitions. [2019-11-06 19:17:27,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:17:27,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 3988 transitions. [2019-11-06 19:17:27,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2019-11-06 19:17:27,309 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:27,309 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 19:17:27,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:17:27,513 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:27,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:27,513 INFO L82 PathProgramCache]: Analyzing trace with hash -318977725, now seen corresponding path program 1 times [2019-11-06 19:17:27,514 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:27,514 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131185758] [2019-11-06 19:17:27,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 235 proven. 71 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 19:17:27,872 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131185758] [2019-11-06 19:17:27,872 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791358124] [2019-11-06 19:17:27,872 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 19:17:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:28,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:17:28,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 340 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 19:17:28,170 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:17:28,170 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:17:28,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346625675] [2019-11-06 19:17:28,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:17:28,172 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:28,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:17:28,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:17:28,173 INFO L87 Difference]: Start difference. First operand 3097 states and 3988 transitions. Second operand 11 states. [2019-11-06 19:17:36,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:36,572 INFO L93 Difference]: Finished difference Result 10419 states and 14042 transitions. [2019-11-06 19:17:36,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 19:17:36,572 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 340 [2019-11-06 19:17:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:36,610 INFO L225 Difference]: With dead ends: 10419 [2019-11-06 19:17:36,610 INFO L226 Difference]: Without dead ends: 6317 [2019-11-06 19:17:36,621 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 354 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 19:17:36,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2019-11-06 19:17:36,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 5938. [2019-11-06 19:17:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5938 states. [2019-11-06 19:17:36,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5938 states to 5938 states and 7569 transitions. [2019-11-06 19:17:36,786 INFO L78 Accepts]: Start accepts. Automaton has 5938 states and 7569 transitions. Word has length 340 [2019-11-06 19:17:36,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:36,787 INFO L462 AbstractCegarLoop]: Abstraction has 5938 states and 7569 transitions. [2019-11-06 19:17:36,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:17:36,787 INFO L276 IsEmpty]: Start isEmpty. Operand 5938 states and 7569 transitions. [2019-11-06 19:17:36,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2019-11-06 19:17:36,797 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:36,797 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:37,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:17:37,003 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:37,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1913009258, now seen corresponding path program 1 times [2019-11-06 19:17:37,004 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:37,004 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136224229] [2019-11-06 19:17:37,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 243 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 19:17:37,521 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136224229] [2019-11-06 19:17:37,521 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670013224] [2019-11-06 19:17:37,521 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 19:17:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:37,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:17:37,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 362 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 19:17:37,790 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:17:37,791 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-11-06 19:17:37,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655679805] [2019-11-06 19:17:37,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:17:37,792 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:37,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:17:37,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:17:37,793 INFO L87 Difference]: Start difference. First operand 5938 states and 7569 transitions. Second operand 11 states. [2019-11-06 19:17:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:42,030 INFO L93 Difference]: Finished difference Result 13329 states and 17713 transitions. [2019-11-06 19:17:42,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:17:42,031 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 377 [2019-11-06 19:17:42,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:42,067 INFO L225 Difference]: With dead ends: 13329 [2019-11-06 19:17:42,067 INFO L226 Difference]: Without dead ends: 7352 [2019-11-06 19:17:42,090 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 384 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:17:42,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7352 states. [2019-11-06 19:17:42,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7352 to 7310. [2019-11-06 19:17:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7310 states. [2019-11-06 19:17:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7310 states to 7310 states and 8304 transitions. [2019-11-06 19:17:42,283 INFO L78 Accepts]: Start accepts. Automaton has 7310 states and 8304 transitions. Word has length 377 [2019-11-06 19:17:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:42,284 INFO L462 AbstractCegarLoop]: Abstraction has 7310 states and 8304 transitions. [2019-11-06 19:17:42,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:17:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 7310 states and 8304 transitions. [2019-11-06 19:17:42,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2019-11-06 19:17:42,302 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:42,306 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:17:42,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:17:42,512 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:42,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:42,514 INFO L82 PathProgramCache]: Analyzing trace with hash -857763430, now seen corresponding path program 1 times [2019-11-06 19:17:42,514 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:42,514 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166789873] [2019-11-06 19:17:42,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 321 proven. 240 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2019-11-06 19:17:43,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166789873] [2019-11-06 19:17:43,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628820782] [2019-11-06 19:17:43,411 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 19:17:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:43,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:17:43,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 721 proven. 2 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2019-11-06 19:17:43,880 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:17:43,880 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 19:17:43,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893792620] [2019-11-06 19:17:43,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:17:43,882 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:43,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:17:43,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:17:43,883 INFO L87 Difference]: Start difference. First operand 7310 states and 8304 transitions. Second operand 12 states.