/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/Problem18_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:57:23,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:57:23,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:57:23,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:57:23,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:57:23,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:57:23,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:57:23,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:57:23,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:57:23,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:57:23,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:57:23,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:57:23,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:57:23,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:57:23,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:57:23,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:57:23,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:57:23,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:57:23,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:57:23,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:57:23,987 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 22:57:24,005 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:57:24,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:57:24,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:57:24,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:57:24,007 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:57:24,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:57:24,007 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:57:24,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:57:24,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:57:24,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:57:24,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:57:24,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:57:24,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:57:24,010 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:57:24,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:57:24,011 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:57:24,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:57:24,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:57:24,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:57:24,012 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:57:24,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:57:24,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:57:24,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:57:24,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:57:24,013 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:57:24,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:57:24,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:57:24,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:57:24,014 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 22:57:24,342 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:57:24,358 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:57:24,362 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:57:24,363 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:57:24,363 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:57:24,364 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label27.c [2019-11-06 22:57:24,432 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e60718bf0/67922fd5fb47407b9af70ea43f957ca1/FLAG3ad73d86b [2019-11-06 22:57:25,223 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:57:25,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label27.c [2019-11-06 22:57:25,260 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e60718bf0/67922fd5fb47407b9af70ea43f957ca1/FLAG3ad73d86b [2019-11-06 22:57:25,764 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e60718bf0/67922fd5fb47407b9af70ea43f957ca1 [2019-11-06 22:57:25,773 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:57:25,775 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:57:25,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:57:25,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:57:25,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:57:25,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:25" (1/1) ... [2019-11-06 22:57:25,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a3be5b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:25, skipping insertion in model container [2019-11-06 22:57:25,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:25" (1/1) ... [2019-11-06 22:57:25,791 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:57:25,903 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:57:27,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:57:27,453 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:57:27,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:57:27,946 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:57:27,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:27 WrapperNode [2019-11-06 22:57:27,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:57:27,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:57:27,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:57:27,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:57:27,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:27" (1/1) ... [2019-11-06 22:57:27,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:27" (1/1) ... [2019-11-06 22:57:28,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:27" (1/1) ... [2019-11-06 22:57:28,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:27" (1/1) ... [2019-11-06 22:57:28,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:27" (1/1) ... [2019-11-06 22:57:28,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:27" (1/1) ... [2019-11-06 22:57:28,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:27" (1/1) ... [2019-11-06 22:57:28,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:57:28,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:57:28,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:57:28,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:57:28,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:27" (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 22:57:28,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:57:28,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:57:28,245 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:57:28,245 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:57:28,245 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:57:28,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:57:28,246 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:57:28,246 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:57:28,246 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:57:28,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:57:28,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:57:28,247 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:57:28,247 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:57:28,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:57:28,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:57:31,941 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:57:31,941 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:57:31,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:31 BoogieIcfgContainer [2019-11-06 22:57:31,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:57:31,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:57:31,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:57:31,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:57:31,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:57:25" (1/3) ... [2019-11-06 22:57:31,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1938dcd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:31, skipping insertion in model container [2019-11-06 22:57:31,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:27" (2/3) ... [2019-11-06 22:57:31,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1938dcd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:31, skipping insertion in model container [2019-11-06 22:57:31,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:31" (3/3) ... [2019-11-06 22:57:31,951 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label27.c [2019-11-06 22:57:31,961 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:57:31,970 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:57:31,982 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:57:32,026 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:57:32,026 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:57:32,027 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:57:32,027 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:57:32,027 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:57:32,027 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:57:32,027 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:57:32,027 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:57:32,070 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 22:57:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 22:57:32,077 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:32,079 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] [2019-11-06 22:57:32,080 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:32,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:32,086 INFO L82 PathProgramCache]: Analyzing trace with hash 602165681, now seen corresponding path program 1 times [2019-11-06 22:57:32,095 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:32,096 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869639340] [2019-11-06 22:57:32,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:32,377 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 22:57:32,378 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869639340] [2019-11-06 22:57:32,379 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:32,379 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:57:32,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061750242] [2019-11-06 22:57:32,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:57:32,388 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:32,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:57:32,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:57:32,407 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-11-06 22:57:37,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:37,025 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-11-06 22:57:37,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:57:37,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2019-11-06 22:57:37,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:37,067 INFO L225 Difference]: With dead ends: 2248 [2019-11-06 22:57:37,067 INFO L226 Difference]: Without dead ends: 1412 [2019-11-06 22:57:37,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:57:37,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-11-06 22:57:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-11-06 22:57:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-11-06 22:57:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-11-06 22:57:37,243 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 36 [2019-11-06 22:57:37,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:37,245 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-11-06 22:57:37,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:57:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-11-06 22:57:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 22:57:37,253 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:37,254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:37,254 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:37,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:37,255 INFO L82 PathProgramCache]: Analyzing trace with hash -820345212, now seen corresponding path program 1 times [2019-11-06 22:57:37,255 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:37,255 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554727946] [2019-11-06 22:57:37,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:37,519 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554727946] [2019-11-06 22:57:37,519 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:37,520 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:57:37,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608968959] [2019-11-06 22:57:37,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:57:37,522 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:37,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:57:37,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:57:37,523 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-11-06 22:57:42,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:42,653 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-11-06 22:57:42,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:42,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2019-11-06 22:57:42,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:42,677 INFO L225 Difference]: With dead ends: 4294 [2019-11-06 22:57:42,677 INFO L226 Difference]: Without dead ends: 2888 [2019-11-06 22:57:42,682 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 22:57:42,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-11-06 22:57:42,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-11-06 22:57:42,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-11-06 22:57:42,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4761 transitions. [2019-11-06 22:57:42,790 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4761 transitions. Word has length 110 [2019-11-06 22:57:42,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:42,793 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 4761 transitions. [2019-11-06 22:57:42,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:57:42,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4761 transitions. [2019-11-06 22:57:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 22:57:42,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:42,806 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:42,806 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:42,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:42,807 INFO L82 PathProgramCache]: Analyzing trace with hash -784208084, now seen corresponding path program 1 times [2019-11-06 22:57:42,808 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:42,808 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167190009] [2019-11-06 22:57:42,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:43,054 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167190009] [2019-11-06 22:57:43,054 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:43,055 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:57:43,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965702124] [2019-11-06 22:57:43,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:57:43,057 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:43,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:57:43,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:57:43,058 INFO L87 Difference]: Start difference. First operand 2864 states and 4761 transitions. Second operand 6 states. [2019-11-06 22:57:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:47,714 INFO L93 Difference]: Finished difference Result 7205 states and 11771 transitions. [2019-11-06 22:57:47,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:47,719 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-11-06 22:57:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:47,739 INFO L225 Difference]: With dead ends: 7205 [2019-11-06 22:57:47,740 INFO L226 Difference]: Without dead ends: 4347 [2019-11-06 22:57:47,746 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 22:57:47,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2019-11-06 22:57:47,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 4331. [2019-11-06 22:57:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4331 states. [2019-11-06 22:57:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 6101 transitions. [2019-11-06 22:57:47,887 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 6101 transitions. Word has length 122 [2019-11-06 22:57:47,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:47,887 INFO L462 AbstractCegarLoop]: Abstraction has 4331 states and 6101 transitions. [2019-11-06 22:57:47,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:57:47,888 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 6101 transitions. [2019-11-06 22:57:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-06 22:57:47,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:47,890 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:47,890 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:47,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:47,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1874435001, now seen corresponding path program 1 times [2019-11-06 22:57:47,891 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:47,891 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305536392] [2019-11-06 22:57:47,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:48,099 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305536392] [2019-11-06 22:57:48,099 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971477976] [2019-11-06 22:57:48,100 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 22:57:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:48,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:57:48,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:57:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:48,304 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:57:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:48,402 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:57:48,402 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-11-06 22:57:48,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969308344] [2019-11-06 22:57:48,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:57:48,404 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:48,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:57:48,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:57:48,405 INFO L87 Difference]: Start difference. First operand 4331 states and 6101 transitions. Second operand 4 states. [2019-11-06 22:57:54,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:54,078 INFO L93 Difference]: Finished difference Result 15792 states and 22607 transitions. [2019-11-06 22:57:54,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:57:54,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2019-11-06 22:57:54,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:54,130 INFO L225 Difference]: With dead ends: 15792 [2019-11-06 22:57:54,130 INFO L226 Difference]: Without dead ends: 11467 [2019-11-06 22:57:54,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:57:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11467 states. [2019-11-06 22:57:54,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11467 to 10052. [2019-11-06 22:57:54,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10052 states. [2019-11-06 22:57:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10052 states to 10052 states and 13427 transitions. [2019-11-06 22:57:54,457 INFO L78 Accepts]: Start accepts. Automaton has 10052 states and 13427 transitions. Word has length 147 [2019-11-06 22:57:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:54,459 INFO L462 AbstractCegarLoop]: Abstraction has 10052 states and 13427 transitions. [2019-11-06 22:57:54,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:57:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 10052 states and 13427 transitions. [2019-11-06 22:57:54,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-06 22:57:54,466 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:54,466 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, 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] [2019-11-06 22:57:54,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:57:54,681 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:54,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:54,681 INFO L82 PathProgramCache]: Analyzing trace with hash -980264100, now seen corresponding path program 1 times [2019-11-06 22:57:54,682 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:54,682 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576564101] [2019-11-06 22:57:54,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 58 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:57:54,867 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576564101] [2019-11-06 22:57:54,867 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310869679] [2019-11-06 22:57:54,867 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 22:57:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:54,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:57:54,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:57:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 22:57:55,031 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:57:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 58 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:57:55,142 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:57:55,143 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-11-06 22:57:55,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416682675] [2019-11-06 22:57:55,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:57:55,145 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:55,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:57:55,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:57:55,145 INFO L87 Difference]: Start difference. First operand 10052 states and 13427 transitions. Second operand 5 states. [2019-11-06 22:58:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:00,534 INFO L93 Difference]: Finished difference Result 20273 states and 27438 transitions. [2019-11-06 22:58:00,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:00,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 181 [2019-11-06 22:58:00,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:00,574 INFO L225 Difference]: With dead ends: 20273 [2019-11-06 22:58:00,574 INFO L226 Difference]: Without dead ends: 10227 [2019-11-06 22:58:00,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 357 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:58:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10227 states. [2019-11-06 22:58:00,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10227 to 9453. [2019-11-06 22:58:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9453 states. [2019-11-06 22:58:00,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9453 states to 9453 states and 11904 transitions. [2019-11-06 22:58:00,817 INFO L78 Accepts]: Start accepts. Automaton has 9453 states and 11904 transitions. Word has length 181 [2019-11-06 22:58:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:00,819 INFO L462 AbstractCegarLoop]: Abstraction has 9453 states and 11904 transitions. [2019-11-06 22:58:00,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:58:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 9453 states and 11904 transitions. [2019-11-06 22:58:00,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-11-06 22:58:00,824 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:00,825 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, 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] [2019-11-06 22:58:01,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:58:01,029 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:01,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:01,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1382706633, now seen corresponding path program 1 times [2019-11-06 22:58:01,029 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:01,029 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248644818] [2019-11-06 22:58:01,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 130 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:01,230 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248644818] [2019-11-06 22:58:01,230 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032122894] [2019-11-06 22:58:01,230 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 22:58:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:01,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:58:01,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:58:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 130 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:01,559 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:58:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 130 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:01,692 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1991169228] [2019-11-06 22:58:01,699 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 233