/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_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:53:54,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:53:54,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:53:54,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:53:54,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:53:54,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:53:54,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:53:54,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:53:54,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:53:54,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:53:54,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:53:54,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:53:54,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:53:54,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:53:54,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:53:54,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:53:54,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:53:54,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:53:54,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:53:54,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:53:54,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:53:54,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:53:54,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:53:54,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:53:54,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:53:54,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:53:54,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:53:54,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:53:54,365 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 22:53:54,403 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:53:54,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:53:54,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:53:54,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:53:54,405 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:53:54,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:53:54,405 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:53:54,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:53:54,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:53:54,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:53:54,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:53:54,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:53:54,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:53:54,406 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:53:54,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:53:54,407 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:53:54,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:53:54,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:53:54,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:53:54,411 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:53:54,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:53:54,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:53:54,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:53:54,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:53:54,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:53:54,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:53:54,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:53:54,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:53:54,414 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 22:53:54,715 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:53:54,732 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:53:54,736 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:53:54,737 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:53:54,738 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:53:54,739 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label10.c [2019-11-06 22:53:54,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95fa8f867/dc9a2e03037343688f08ebd1faa542c4/FLAGcdc049764 [2019-11-06 22:53:55,474 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:53:55,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label10.c [2019-11-06 22:53:55,494 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95fa8f867/dc9a2e03037343688f08ebd1faa542c4/FLAGcdc049764 [2019-11-06 22:53:55,649 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95fa8f867/dc9a2e03037343688f08ebd1faa542c4 [2019-11-06 22:53:55,660 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:53:55,661 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:53:55,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:53:55,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:53:55,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:53:55,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:55" (1/1) ... [2019-11-06 22:53:55,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b4092cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:55, skipping insertion in model container [2019-11-06 22:53:55,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:55" (1/1) ... [2019-11-06 22:53:55,681 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:53:55,752 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:53:56,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:53:56,689 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:53:57,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:53:57,073 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:53:57,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:57 WrapperNode [2019-11-06 22:53:57,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:53:57,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:53:57,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:53:57,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:53:57,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:57" (1/1) ... [2019-11-06 22:53:57,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:57" (1/1) ... [2019-11-06 22:53:57,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:57" (1/1) ... [2019-11-06 22:53:57,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:57" (1/1) ... [2019-11-06 22:53:57,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:57" (1/1) ... [2019-11-06 22:53:57,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:57" (1/1) ... [2019-11-06 22:53:57,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:57" (1/1) ... [2019-11-06 22:53:57,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:53:57,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:53:57,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:53:57,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:53:57,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:57" (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 22:53:57,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:53:57,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:53:57,341 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:53:57,342 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:53:57,342 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:53:57,342 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:53:57,342 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:53:57,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:53:57,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:53:57,343 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:53:57,343 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:53:57,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:53:57,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:53:59,738 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:53:59,738 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:53:59,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:59 BoogieIcfgContainer [2019-11-06 22:53:59,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:53:59,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:53:59,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:53:59,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:53:59,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:53:55" (1/3) ... [2019-11-06 22:53:59,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b6586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:59, skipping insertion in model container [2019-11-06 22:53:59,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:57" (2/3) ... [2019-11-06 22:53:59,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b6586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:59, skipping insertion in model container [2019-11-06 22:53:59,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:59" (3/3) ... [2019-11-06 22:53:59,757 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label10.c [2019-11-06 22:53:59,774 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:53:59,791 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:53:59,810 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:53:59,871 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:53:59,871 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:53:59,872 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:53:59,872 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:53:59,872 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:53:59,872 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:53:59,872 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:53:59,872 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:53:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:53:59,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 22:53:59,933 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:59,935 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] [2019-11-06 22:53:59,937 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:59,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:59,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1129192547, now seen corresponding path program 1 times [2019-11-06 22:53:59,959 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:59,959 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670473531] [2019-11-06 22:53:59,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:00,406 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 22:54:00,407 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670473531] [2019-11-06 22:54:00,408 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:00,408 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:54:00,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694635865] [2019-11-06 22:54:00,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:54:00,417 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:00,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:54:00,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:54:00,434 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-11-06 22:54:04,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:04,414 INFO L93 Difference]: Finished difference Result 1509 states and 2834 transitions. [2019-11-06 22:54:04,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:54:04,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2019-11-06 22:54:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:04,444 INFO L225 Difference]: With dead ends: 1509 [2019-11-06 22:54:04,444 INFO L226 Difference]: Without dead ends: 1019 [2019-11-06 22:54:04,457 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 22:54:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-11-06 22:54:04,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1019. [2019-11-06 22:54:04,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2019-11-06 22:54:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1739 transitions. [2019-11-06 22:54:04,619 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1739 transitions. Word has length 38 [2019-11-06 22:54:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:04,620 INFO L462 AbstractCegarLoop]: Abstraction has 1019 states and 1739 transitions. [2019-11-06 22:54:04,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:54:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1739 transitions. [2019-11-06 22:54:04,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-06 22:54:04,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:04,627 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:04,627 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:04,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:04,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2138729124, now seen corresponding path program 1 times [2019-11-06 22:54:04,628 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:04,628 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009520857] [2019-11-06 22:54:04,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:04,795 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009520857] [2019-11-06 22:54:04,795 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:04,795 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:04,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417971382] [2019-11-06 22:54:04,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:04,798 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:04,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:04,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:04,799 INFO L87 Difference]: Start difference. First operand 1019 states and 1739 transitions. Second operand 6 states. [2019-11-06 22:54:07,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:07,463 INFO L93 Difference]: Finished difference Result 3097 states and 5370 transitions. [2019-11-06 22:54:07,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:07,464 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-11-06 22:54:07,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:07,486 INFO L225 Difference]: With dead ends: 3097 [2019-11-06 22:54:07,486 INFO L226 Difference]: Without dead ends: 2084 [2019-11-06 22:54:07,491 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 22:54:07,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2019-11-06 22:54:07,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 2061. [2019-11-06 22:54:07,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2061 states. [2019-11-06 22:54:07,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 3384 transitions. [2019-11-06 22:54:07,581 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 3384 transitions. Word has length 108 [2019-11-06 22:54:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:07,583 INFO L462 AbstractCegarLoop]: Abstraction has 2061 states and 3384 transitions. [2019-11-06 22:54:07,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:07,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 3384 transitions. [2019-11-06 22:54:07,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-06 22:54:07,594 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:07,595 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:07,595 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:07,597 INFO L82 PathProgramCache]: Analyzing trace with hash -899506204, now seen corresponding path program 1 times [2019-11-06 22:54:07,597 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:07,597 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207089090] [2019-11-06 22:54:07,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:07,878 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207089090] [2019-11-06 22:54:07,879 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:07,879 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:07,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106309991] [2019-11-06 22:54:07,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:07,882 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:07,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:07,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:07,883 INFO L87 Difference]: Start difference. First operand 2061 states and 3384 transitions. Second operand 6 states. [2019-11-06 22:54:10,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:10,959 INFO L93 Difference]: Finished difference Result 5904 states and 10021 transitions. [2019-11-06 22:54:10,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:10,962 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2019-11-06 22:54:10,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:10,990 INFO L225 Difference]: With dead ends: 5904 [2019-11-06 22:54:10,991 INFO L226 Difference]: Without dead ends: 3849 [2019-11-06 22:54:10,998 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 22:54:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2019-11-06 22:54:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3813. [2019-11-06 22:54:11,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3813 states. [2019-11-06 22:54:11,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 6183 transitions. [2019-11-06 22:54:11,198 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 6183 transitions. Word has length 136 [2019-11-06 22:54:11,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:11,200 INFO L462 AbstractCegarLoop]: Abstraction has 3813 states and 6183 transitions. [2019-11-06 22:54:11,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 6183 transitions. [2019-11-06 22:54:11,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-06 22:54:11,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:11,205 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:11,205 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:11,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:11,205 INFO L82 PathProgramCache]: Analyzing trace with hash -387784608, now seen corresponding path program 1 times [2019-11-06 22:54:11,208 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:11,208 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191746533] [2019-11-06 22:54:11,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:11,395 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191746533] [2019-11-06 22:54:11,395 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:11,396 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:11,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394224973] [2019-11-06 22:54:11,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:11,397 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:11,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:11,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:11,399 INFO L87 Difference]: Start difference. First operand 3813 states and 6183 transitions. Second operand 6 states. [2019-11-06 22:54:14,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:14,216 INFO L93 Difference]: Finished difference Result 9749 states and 16101 transitions. [2019-11-06 22:54:14,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:14,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 154 [2019-11-06 22:54:14,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:14,256 INFO L225 Difference]: With dead ends: 9749 [2019-11-06 22:54:14,256 INFO L226 Difference]: Without dead ends: 5942 [2019-11-06 22:54:14,267 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 22:54:14,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2019-11-06 22:54:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 5896. [2019-11-06 22:54:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5896 states. [2019-11-06 22:54:14,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 8054 transitions. [2019-11-06 22:54:14,448 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 8054 transitions. Word has length 154 [2019-11-06 22:54:14,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:14,449 INFO L462 AbstractCegarLoop]: Abstraction has 5896 states and 8054 transitions. [2019-11-06 22:54:14,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:14,449 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 8054 transitions. [2019-11-06 22:54:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-11-06 22:54:14,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:14,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:14,454 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:14,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:14,455 INFO L82 PathProgramCache]: Analyzing trace with hash 215437429, now seen corresponding path program 1 times [2019-11-06 22:54:14,455 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:14,456 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238880440] [2019-11-06 22:54:14,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:14,736 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238880440] [2019-11-06 22:54:14,736 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:14,736 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:14,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35069185] [2019-11-06 22:54:14,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:14,737 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:14,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:14,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:14,738 INFO L87 Difference]: Start difference. First operand 5896 states and 8054 transitions. Second operand 6 states. [2019-11-06 22:54:17,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:17,633 INFO L93 Difference]: Finished difference Result 14575 states and 20025 transitions. [2019-11-06 22:54:17,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:17,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 201 [2019-11-06 22:54:17,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:17,673 INFO L225 Difference]: With dead ends: 14575 [2019-11-06 22:54:17,673 INFO L226 Difference]: Without dead ends: 8685 [2019-11-06 22:54:17,689 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 22:54:17,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8685 states. [2019-11-06 22:54:17,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8685 to 8651. [2019-11-06 22:54:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8651 states. [2019-11-06 22:54:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8651 states to 8651 states and 11412 transitions. [2019-11-06 22:54:17,942 INFO L78 Accepts]: Start accepts. Automaton has 8651 states and 11412 transitions. Word has length 201 [2019-11-06 22:54:17,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:17,943 INFO L462 AbstractCegarLoop]: Abstraction has 8651 states and 11412 transitions. [2019-11-06 22:54:17,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:17,944 INFO L276 IsEmpty]: Start isEmpty. Operand 8651 states and 11412 transitions. [2019-11-06 22:54:17,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-11-06 22:54:17,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:17,950 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, 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] [2019-11-06 22:54:17,950 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:17,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:17,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1906343064, now seen corresponding path program 1 times [2019-11-06 22:54:17,951 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:17,951 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72178400] [2019-11-06 22:54:17,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 22:54:18,142 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72178400] [2019-11-06 22:54:18,143 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:18,143 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:54:18,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469052826] [2019-11-06 22:54:18,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:54:18,145 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:18,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:54:18,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:54:18,145 INFO L87 Difference]: Start difference. First operand 8651 states and 11412 transitions. Second operand 4 states. [2019-11-06 22:54:21,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:21,380 INFO L93 Difference]: Finished difference Result 23062 states and 30660 transitions. [2019-11-06 22:54:21,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:54:21,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 237 [2019-11-06 22:54:21,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:21,438 INFO L225 Difference]: With dead ends: 23062 [2019-11-06 22:54:21,438 INFO L226 Difference]: Without dead ends: 14417 [2019-11-06 22:54:21,464 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 22:54:21,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14417 states. [2019-11-06 22:54:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14417 to 13741. [2019-11-06 22:54:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13741 states. [2019-11-06 22:54:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13741 states to 13741 states and 17470 transitions. [2019-11-06 22:54:21,738 INFO L78 Accepts]: Start accepts. Automaton has 13741 states and 17470 transitions. Word has length 237 [2019-11-06 22:54:21,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:21,739 INFO L462 AbstractCegarLoop]: Abstraction has 13741 states and 17470 transitions. [2019-11-06 22:54:21,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:54:21,739 INFO L276 IsEmpty]: Start isEmpty. Operand 13741 states and 17470 transitions. [2019-11-06 22:54:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2019-11-06 22:54:21,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:21,759 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, 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, 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 22:54:21,760 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:21,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1225908112, now seen corresponding path program 1 times [2019-11-06 22:54:21,766 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:21,766 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999198403] [2019-11-06 22:54:21,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 210 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-06 22:54:22,230 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999198403] [2019-11-06 22:54:22,230 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662383991] [2019-11-06 22:54:22,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:54:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:22,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:54:22,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-06 22:54:22,688 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 210 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-06 22:54:23,123 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [203236777] [2019-11-06 22:54:23,129 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 421 [2019-11-06 22:54:23,197 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:54:23,197 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)