/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:55:55,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:55:55,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:55:55,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:55:55,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:55:55,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:55:55,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:55:55,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:55:55,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:55:55,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:55:55,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:55:55,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:55:55,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:55:55,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:55:55,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:55:55,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:55:55,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:55:55,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:55:55,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:55:55,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:55:55,986 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 22:55:56,015 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:55:56,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:55:56,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:55:56,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:55:56,017 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:55:56,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:55:56,017 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:55:56,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:55:56,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:55:56,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:55:56,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:55:56,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:55:56,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:55:56,018 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:55:56,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:55:56,019 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:55:56,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:55:56,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:55:56,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:55:56,020 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:55:56,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:55:56,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:55:56,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:55:56,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:55:56,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:55:56,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:55:56,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:55:56,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:55:56,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:55:56,290 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:55:56,303 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:55:56,306 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:55:56,308 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:55:56,308 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:55:56,309 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label50.c [2019-11-06 22:55:56,370 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9be56d39/7877cd893791446c89017b9f658f9d62/FLAG0a564ab9c [2019-11-06 22:55:57,017 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:55:57,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label50.c [2019-11-06 22:55:57,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9be56d39/7877cd893791446c89017b9f658f9d62/FLAG0a564ab9c [2019-11-06 22:55:57,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9be56d39/7877cd893791446c89017b9f658f9d62 [2019-11-06 22:55:57,224 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:55:57,225 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:55:57,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:57,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:55:57,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:55:57,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:57" (1/1) ... [2019-11-06 22:55:57,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@123ae4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:57, skipping insertion in model container [2019-11-06 22:55:57,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:57" (1/1) ... [2019-11-06 22:55:57,245 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:55:57,327 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:55:58,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:58,171 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:55:58,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:58,693 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:55:58,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:58 WrapperNode [2019-11-06 22:55:58,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:58,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:55:58,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:55:58,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:55:58,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:58" (1/1) ... [2019-11-06 22:55:58,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:58" (1/1) ... [2019-11-06 22:55:58,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:58" (1/1) ... [2019-11-06 22:55:58,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:58" (1/1) ... [2019-11-06 22:55:58,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:58" (1/1) ... [2019-11-06 22:55:58,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:58" (1/1) ... [2019-11-06 22:55:58,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:58" (1/1) ... [2019-11-06 22:55:58,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:55:58,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:55:58,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:55:58,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:55:58,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:55:58,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:55:58,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:55:58,993 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:55:58,993 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:55:58,993 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:55:58,994 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:55:58,994 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:55:58,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:55:58,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:55:58,995 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:55:58,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:55:58,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:55:58,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:56:01,341 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:56:01,342 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:56:01,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:01 BoogieIcfgContainer [2019-11-06 22:56:01,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:56:01,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:56:01,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:56:01,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:56:01,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:55:57" (1/3) ... [2019-11-06 22:56:01,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1703f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:01, skipping insertion in model container [2019-11-06 22:56:01,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:58" (2/3) ... [2019-11-06 22:56:01,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1703f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:01, skipping insertion in model container [2019-11-06 22:56:01,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:01" (3/3) ... [2019-11-06 22:56:01,366 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label50.c [2019-11-06 22:56:01,383 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:56:01,396 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:56:01,414 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:56:01,467 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:56:01,467 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:56:01,467 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:56:01,468 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:56:01,468 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:56:01,468 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:56:01,468 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:56:01,469 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:56:01,518 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:56:01,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 22:56:01,531 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:01,533 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] [2019-11-06 22:56:01,535 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:01,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:01,542 INFO L82 PathProgramCache]: Analyzing trace with hash 789303234, now seen corresponding path program 1 times [2019-11-06 22:56:01,555 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:01,556 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912991116] [2019-11-06 22:56:01,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:02,009 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 22:56:02,010 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912991116] [2019-11-06 22:56:02,011 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:02,011 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:56:02,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787374321] [2019-11-06 22:56:02,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:56:02,019 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:02,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:56:02,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:56:02,036 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-11-06 22:56:06,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:06,040 INFO L93 Difference]: Finished difference Result 1509 states and 2834 transitions. [2019-11-06 22:56:06,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:56:06,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2019-11-06 22:56:06,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:06,069 INFO L225 Difference]: With dead ends: 1509 [2019-11-06 22:56:06,069 INFO L226 Difference]: Without dead ends: 1019 [2019-11-06 22:56:06,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:56:06,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-11-06 22:56:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1019. [2019-11-06 22:56:06,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2019-11-06 22:56:06,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1739 transitions. [2019-11-06 22:56:06,213 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1739 transitions. Word has length 51 [2019-11-06 22:56:06,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:06,214 INFO L462 AbstractCegarLoop]: Abstraction has 1019 states and 1739 transitions. [2019-11-06 22:56:06,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:56:06,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1739 transitions. [2019-11-06 22:56:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-06 22:56:06,221 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:06,221 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:06,221 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:06,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:06,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1245214242, now seen corresponding path program 1 times [2019-11-06 22:56:06,222 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:06,222 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972412368] [2019-11-06 22:56:06,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:06,453 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972412368] [2019-11-06 22:56:06,453 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:06,453 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:56:06,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842504010] [2019-11-06 22:56:06,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:56:06,464 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:06,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:56:06,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:56:06,464 INFO L87 Difference]: Start difference. First operand 1019 states and 1739 transitions. Second operand 6 states. [2019-11-06 22:56:09,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:09,207 INFO L93 Difference]: Finished difference Result 3097 states and 5370 transitions. [2019-11-06 22:56:09,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:09,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2019-11-06 22:56:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:09,225 INFO L225 Difference]: With dead ends: 3097 [2019-11-06 22:56:09,225 INFO L226 Difference]: Without dead ends: 2084 [2019-11-06 22:56:09,230 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:56:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2019-11-06 22:56:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 2061. [2019-11-06 22:56:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2061 states. [2019-11-06 22:56:09,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 3384 transitions. [2019-11-06 22:56:09,304 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 3384 transitions. Word has length 121 [2019-11-06 22:56:09,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:09,305 INFO L462 AbstractCegarLoop]: Abstraction has 2061 states and 3384 transitions. [2019-11-06 22:56:09,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:56:09,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 3384 transitions. [2019-11-06 22:56:09,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-06 22:56:09,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:09,318 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:09,319 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:09,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:09,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1384987622, now seen corresponding path program 1 times [2019-11-06 22:56:09,319 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:09,319 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175997769] [2019-11-06 22:56:09,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:09,544 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175997769] [2019-11-06 22:56:09,544 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:09,544 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:56:09,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148952011] [2019-11-06 22:56:09,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:56:09,545 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:09,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:56:09,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:56:09,546 INFO L87 Difference]: Start difference. First operand 2061 states and 3384 transitions. Second operand 6 states. [2019-11-06 22:56:12,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:12,362 INFO L93 Difference]: Finished difference Result 5904 states and 10021 transitions. [2019-11-06 22:56:12,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:12,362 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-11-06 22:56:12,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:12,389 INFO L225 Difference]: With dead ends: 5904 [2019-11-06 22:56:12,390 INFO L226 Difference]: Without dead ends: 3849 [2019-11-06 22:56:12,396 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:56:12,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2019-11-06 22:56:12,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3813. [2019-11-06 22:56:12,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3813 states. [2019-11-06 22:56:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 6183 transitions. [2019-11-06 22:56:12,519 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 6183 transitions. Word has length 149 [2019-11-06 22:56:12,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:12,520 INFO L462 AbstractCegarLoop]: Abstraction has 3813 states and 6183 transitions. [2019-11-06 22:56:12,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:56:12,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 6183 transitions. [2019-11-06 22:56:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-06 22:56:12,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:12,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:12,523 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:12,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1196358494, now seen corresponding path program 1 times [2019-11-06 22:56:12,524 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:12,524 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127386107] [2019-11-06 22:56:12,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:12,662 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127386107] [2019-11-06 22:56:12,662 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:12,663 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:56:12,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065095067] [2019-11-06 22:56:12,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:56:12,664 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:12,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:56:12,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:56:12,665 INFO L87 Difference]: Start difference. First operand 3813 states and 6183 transitions. Second operand 6 states. [2019-11-06 22:56:15,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:15,197 INFO L93 Difference]: Finished difference Result 9749 states and 16101 transitions. [2019-11-06 22:56:15,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:15,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 167 [2019-11-06 22:56:15,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:15,231 INFO L225 Difference]: With dead ends: 9749 [2019-11-06 22:56:15,231 INFO L226 Difference]: Without dead ends: 5942 [2019-11-06 22:56:15,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:56:15,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2019-11-06 22:56:15,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 5896. [2019-11-06 22:56:15,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5896 states. [2019-11-06 22:56:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 8054 transitions. [2019-11-06 22:56:15,425 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 8054 transitions. Word has length 167 [2019-11-06 22:56:15,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:15,425 INFO L462 AbstractCegarLoop]: Abstraction has 5896 states and 8054 transitions. [2019-11-06 22:56:15,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:56:15,426 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 8054 transitions. [2019-11-06 22:56:15,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-06 22:56:15,428 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:15,428 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:15,428 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:15,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:15,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1753752437, now seen corresponding path program 1 times [2019-11-06 22:56:15,429 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:15,429 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393979321] [2019-11-06 22:56:15,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:15,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393979321] [2019-11-06 22:56:15,681 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:15,681 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:56:15,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239509643] [2019-11-06 22:56:15,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:56:15,682 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:15,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:56:15,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:56:15,683 INFO L87 Difference]: Start difference. First operand 5896 states and 8054 transitions. Second operand 6 states. [2019-11-06 22:56:18,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:18,403 INFO L93 Difference]: Finished difference Result 14575 states and 20025 transitions. [2019-11-06 22:56:18,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:18,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 214 [2019-11-06 22:56:18,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:18,446 INFO L225 Difference]: With dead ends: 14575 [2019-11-06 22:56:18,447 INFO L226 Difference]: Without dead ends: 8685 [2019-11-06 22:56:18,464 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:56:18,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8685 states. [2019-11-06 22:56:18,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8685 to 8651. [2019-11-06 22:56:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8651 states. [2019-11-06 22:56:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8651 states to 8651 states and 11412 transitions. [2019-11-06 22:56:18,759 INFO L78 Accepts]: Start accepts. Automaton has 8651 states and 11412 transitions. Word has length 214 [2019-11-06 22:56:18,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:18,760 INFO L462 AbstractCegarLoop]: Abstraction has 8651 states and 11412 transitions. [2019-11-06 22:56:18,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:56:18,760 INFO L276 IsEmpty]: Start isEmpty. Operand 8651 states and 11412 transitions. [2019-11-06 22:56:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-11-06 22:56:18,765 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:18,766 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, 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 22:56:18,766 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:18,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:18,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1202654855, now seen corresponding path program 1 times [2019-11-06 22:56:18,767 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:18,767 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642017206] [2019-11-06 22:56:18,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 22:56:18,966 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642017206] [2019-11-06 22:56:18,967 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:18,968 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:56:18,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616032340] [2019-11-06 22:56:18,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:56:18,969 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:18,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:56:18,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:56:18,969 INFO L87 Difference]: Start difference. First operand 8651 states and 11412 transitions. Second operand 4 states. [2019-11-06 22:56:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:22,343 INFO L93 Difference]: Finished difference Result 23062 states and 30660 transitions. [2019-11-06 22:56:22,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:56:22,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 250 [2019-11-06 22:56:22,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:22,395 INFO L225 Difference]: With dead ends: 23062 [2019-11-06 22:56:22,395 INFO L226 Difference]: Without dead ends: 14417 [2019-11-06 22:56:22,421 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:56:22,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14417 states. [2019-11-06 22:56:22,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14417 to 13741. [2019-11-06 22:56:22,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13741 states. [2019-11-06 22:56:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13741 states to 13741 states and 17470 transitions. [2019-11-06 22:56:22,727 INFO L78 Accepts]: Start accepts. Automaton has 13741 states and 17470 transitions. Word has length 250 [2019-11-06 22:56:22,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:22,728 INFO L462 AbstractCegarLoop]: Abstraction has 13741 states and 17470 transitions. [2019-11-06 22:56:22,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:56:22,729 INFO L276 IsEmpty]: Start isEmpty. Operand 13741 states and 17470 transitions. [2019-11-06 22:56:22,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2019-11-06 22:56:22,744 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:22,744 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:56:22,745 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:22,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:22,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1369926926, now seen corresponding path program 1 times [2019-11-06 22:56:22,754 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:22,755 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135008949] [2019-11-06 22:56:22,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 249 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-06 22:56:23,311 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135008949] [2019-11-06 22:56:23,323 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756470369] [2019-11-06 22:56:23,324 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 22:56:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:23,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:56:23,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 444 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-06 22:56:23,911 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 249 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-06 22:56:24,144 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2054922983] [2019-11-06 22:56:24,150 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 434 [2019-11-06 22:56:24,204 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:56:24,204 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)