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/Problem11_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:03:29,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:03:29,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:03:29,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:03:29,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:03:29,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:03:29,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:03:29,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:03:29,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:03:29,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:03:29,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:03:29,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:03:29,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:03:29,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:03:29,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:03:29,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:03:29,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:03:29,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:03:29,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:03:29,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:03:29,777 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 [2019-10-15 00:03:29,796 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:03:29,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:03:29,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:03:29,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:03:29,798 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:03:29,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:03:29,798 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:03:29,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:03:29,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:03:29,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:03:29,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:03:29,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:03:29,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:03:29,805 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:03:29,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:03:29,805 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:03:29,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:03:29,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:03:29,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:03:29,806 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:03:29,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:03:29,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:03:29,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:03:29,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:03:29,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:03:29,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:03:29,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:03:29,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:03:29,810 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 [2019-10-15 00:03:30,072 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:03:30,090 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:03:30,094 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:03:30,095 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:03:30,096 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:03:30,096 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label29.c [2019-10-15 00:03:30,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b84b639d/069f898027f74ac3a340f7e75752f916/FLAG3e06cb5cb [2019-10-15 00:03:30,800 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:03:30,801 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label29.c [2019-10-15 00:03:30,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b84b639d/069f898027f74ac3a340f7e75752f916/FLAG3e06cb5cb [2019-10-15 00:03:30,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b84b639d/069f898027f74ac3a340f7e75752f916 [2019-10-15 00:03:30,988 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:03:30,990 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:03:30,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:30,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:03:30,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:03:30,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:30" (1/1) ... [2019-10-15 00:03:30,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70a09de7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:30, skipping insertion in model container [2019-10-15 00:03:30,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:30" (1/1) ... [2019-10-15 00:03:31,006 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:03:31,070 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:03:31,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:03:31,767 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:03:31,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:03:31,974 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:03:31,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:31 WrapperNode [2019-10-15 00:03:31,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:31,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:03:31,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:03:31,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:03:31,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:31" (1/1) ... [2019-10-15 00:03:31,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:31" (1/1) ... [2019-10-15 00:03:32,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:31" (1/1) ... [2019-10-15 00:03:32,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:31" (1/1) ... [2019-10-15 00:03:32,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:31" (1/1) ... [2019-10-15 00:03:32,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:31" (1/1) ... [2019-10-15 00:03:32,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:31" (1/1) ... [2019-10-15 00:03:32,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:03:32,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:03:32,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:03:32,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:03:32,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:31" (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 [2019-10-15 00:03:32,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:03:32,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:03:32,263 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:03:32,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:03:32,264 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:03:32,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:03:32,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:03:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:03:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:03:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:03:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:03:34,194 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:03:34,194 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:03:34,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:34 BoogieIcfgContainer [2019-10-15 00:03:34,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:03:34,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:03:34,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:03:34,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:03:34,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:03:30" (1/3) ... [2019-10-15 00:03:34,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a05fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:34, skipping insertion in model container [2019-10-15 00:03:34,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:31" (2/3) ... [2019-10-15 00:03:34,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a05fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:34, skipping insertion in model container [2019-10-15 00:03:34,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:34" (3/3) ... [2019-10-15 00:03:34,206 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label29.c [2019-10-15 00:03:34,218 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:03:34,230 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:03:34,244 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:03:34,276 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:03:34,276 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:03:34,277 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:03:34,277 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:03:34,277 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:03:34,277 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:03:34,278 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:03:34,278 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:03:34,308 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:03:34,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 00:03:34,317 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:34,318 INFO L380 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] [2019-10-15 00:03:34,320 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:34,327 INFO L82 PathProgramCache]: Analyzing trace with hash 2007465363, now seen corresponding path program 1 times [2019-10-15 00:03:34,338 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:34,338 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9257409] [2019-10-15 00:03:34,338 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:34,339 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:34,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:34,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9257409] [2019-10-15 00:03:34,581 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:34,581 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:03:34,581 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003479380] [2019-10-15 00:03:34,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:03:34,588 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:34,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:03:34,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:03:34,607 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-15 00:03:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:36,102 INFO L93 Difference]: Finished difference Result 782 states and 1375 transitions. [2019-10-15 00:03:36,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:03:36,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2019-10-15 00:03:36,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:36,144 INFO L225 Difference]: With dead ends: 782 [2019-10-15 00:03:36,145 INFO L226 Difference]: Without dead ends: 428 [2019-10-15 00:03:36,160 INFO L600 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 [2019-10-15 00:03:36,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2019-10-15 00:03:36,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 420. [2019-10-15 00:03:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-15 00:03:36,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 671 transitions. [2019-10-15 00:03:36,302 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 671 transitions. Word has length 26 [2019-10-15 00:03:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:36,303 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 671 transitions. [2019-10-15 00:03:36,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:03:36,305 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 671 transitions. [2019-10-15 00:03:36,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-15 00:03:36,313 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:36,314 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:03:36,315 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:36,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:36,316 INFO L82 PathProgramCache]: Analyzing trace with hash -954827699, now seen corresponding path program 1 times [2019-10-15 00:03:36,316 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:36,317 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076831119] [2019-10-15 00:03:36,317 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:36,317 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:36,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:36,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076831119] [2019-10-15 00:03:36,549 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:36,550 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:03:36,550 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982634078] [2019-10-15 00:03:36,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:03:36,552 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:36,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:03:36,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:03:36,553 INFO L87 Difference]: Start difference. First operand 420 states and 671 transitions. Second operand 6 states. [2019-10-15 00:03:38,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:38,493 INFO L93 Difference]: Finished difference Result 1253 states and 2034 transitions. [2019-10-15 00:03:38,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 00:03:38,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2019-10-15 00:03:38,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:38,500 INFO L225 Difference]: With dead ends: 1253 [2019-10-15 00:03:38,500 INFO L226 Difference]: Without dead ends: 839 [2019-10-15 00:03:38,502 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:03:38,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2019-10-15 00:03:38,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 817. [2019-10-15 00:03:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 817 states. [2019-10-15 00:03:38,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1173 transitions. [2019-10-15 00:03:38,558 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1173 transitions. Word has length 95 [2019-10-15 00:03:38,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:38,560 INFO L462 AbstractCegarLoop]: Abstraction has 817 states and 1173 transitions. [2019-10-15 00:03:38,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:03:38,560 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1173 transitions. [2019-10-15 00:03:38,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-15 00:03:38,565 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:38,566 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:03:38,566 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:38,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:38,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1471750030, now seen corresponding path program 1 times [2019-10-15 00:03:38,571 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:38,571 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862514992] [2019-10-15 00:03:38,571 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:38,571 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:38,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:38,827 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862514992] [2019-10-15 00:03:38,827 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:38,828 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:03:38,828 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207886443] [2019-10-15 00:03:38,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:03:38,829 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:38,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:03:38,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:03:38,830 INFO L87 Difference]: Start difference. First operand 817 states and 1173 transitions. Second operand 6 states. [2019-10-15 00:03:40,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:40,512 INFO L93 Difference]: Finished difference Result 2046 states and 2971 transitions. [2019-10-15 00:03:40,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:03:40,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-10-15 00:03:40,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:40,530 INFO L225 Difference]: With dead ends: 2046 [2019-10-15 00:03:40,531 INFO L226 Difference]: Without dead ends: 1235 [2019-10-15 00:03:40,534 INFO L600 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 [2019-10-15 00:03:40,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2019-10-15 00:03:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1221. [2019-10-15 00:03:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1221 states. [2019-10-15 00:03:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1724 transitions. [2019-10-15 00:03:40,583 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1724 transitions. Word has length 98 [2019-10-15 00:03:40,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:40,584 INFO L462 AbstractCegarLoop]: Abstraction has 1221 states and 1724 transitions. [2019-10-15 00:03:40,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:03:40,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1724 transitions. [2019-10-15 00:03:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-15 00:03:40,586 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:40,586 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:03:40,587 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:40,587 INFO L82 PathProgramCache]: Analyzing trace with hash 698002821, now seen corresponding path program 1 times [2019-10-15 00:03:40,588 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:40,588 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233134180] [2019-10-15 00:03:40,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:40,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:40,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:40,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233134180] [2019-10-15 00:03:40,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435876091] [2019-10-15 00:03:40,816 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 [2019-10-15 00:03:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:40,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:03:40,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:41,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:03:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:41,103 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:41,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:41,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:41,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:41,281 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:41,282 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:03:41,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:41,285 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:41,287 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:03:41,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:41,361 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:41,472 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:03:41,473 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-10-15 00:03:41,473 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902014067] [2019-10-15 00:03:41,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 00:03:41,475 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:41,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 00:03:41,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:03:41,477 INFO L87 Difference]: Start difference. First operand 1221 states and 1724 transitions. Second operand 7 states. [2019-10-15 00:03:44,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:44,178 INFO L93 Difference]: Finished difference Result 4051 states and 6041 transitions. [2019-10-15 00:03:44,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 00:03:44,179 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2019-10-15 00:03:44,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:44,201 INFO L225 Difference]: With dead ends: 4051 [2019-10-15 00:03:44,201 INFO L226 Difference]: Without dead ends: 2836 [2019-10-15 00:03:44,207 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-10-15 00:03:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-10-15 00:03:44,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2789. [2019-10-15 00:03:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2789 states. [2019-10-15 00:03:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 3708 transitions. [2019-10-15 00:03:44,328 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 3708 transitions. Word has length 99 [2019-10-15 00:03:44,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:44,328 INFO L462 AbstractCegarLoop]: Abstraction has 2789 states and 3708 transitions. [2019-10-15 00:03:44,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 00:03:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 3708 transitions. [2019-10-15 00:03:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-15 00:03:44,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:44,332 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:03:44,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:03:44,547 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:44,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:44,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1349266370, now seen corresponding path program 1 times [2019-10-15 00:03:44,548 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:44,548 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595645719] [2019-10-15 00:03:44,548 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:44,548 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:44,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:44,647 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595645719] [2019-10-15 00:03:44,647 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:44,647 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:03:44,647 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532815536] [2019-10-15 00:03:44,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:03:44,648 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:44,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:03:44,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:03:44,649 INFO L87 Difference]: Start difference. First operand 2789 states and 3708 transitions. Second operand 3 states. [2019-10-15 00:03:45,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:45,784 INFO L93 Difference]: Finished difference Result 7093 states and 9716 transitions. [2019-10-15 00:03:45,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:03:45,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2019-10-15 00:03:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:45,816 INFO L225 Difference]: With dead ends: 7093 [2019-10-15 00:03:45,816 INFO L226 Difference]: Without dead ends: 4310 [2019-10-15 00:03:45,826 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:03:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2019-10-15 00:03:45,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4118. [2019-10-15 00:03:45,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4118 states. [2019-10-15 00:03:45,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4118 states to 4118 states and 5297 transitions. [2019-10-15 00:03:45,971 INFO L78 Accepts]: Start accepts. Automaton has 4118 states and 5297 transitions. Word has length 157 [2019-10-15 00:03:45,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:45,972 INFO L462 AbstractCegarLoop]: Abstraction has 4118 states and 5297 transitions. [2019-10-15 00:03:45,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:03:45,972 INFO L276 IsEmpty]: Start isEmpty. Operand 4118 states and 5297 transitions. [2019-10-15 00:03:45,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-15 00:03:45,976 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:45,976 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:03:45,977 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:45,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:45,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1834742215, now seen corresponding path program 1 times [2019-10-15 00:03:45,977 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:45,978 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257852129] [2019-10-15 00:03:45,978 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:45,978 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:45,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:03:46,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257852129] [2019-10-15 00:03:46,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188035933] [2019-10-15 00:03:46,232 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 [2019-10-15 00:03:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:46,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 00:03:46,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:03:46,472 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:03:46,585 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:03:46,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2019-10-15 00:03:46,585 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903117784] [2019-10-15 00:03:46,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:03:46,586 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:46,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:03:46,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:03:46,587 INFO L87 Difference]: Start difference. First operand 4118 states and 5297 transitions. Second operand 4 states. [2019-10-15 00:03:47,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:47,707 INFO L93 Difference]: Finished difference Result 5288 states and 6855 transitions. [2019-10-15 00:03:47,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:03:47,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2019-10-15 00:03:47,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:47,742 INFO L225 Difference]: With dead ends: 5288 [2019-10-15 00:03:47,742 INFO L226 Difference]: Without dead ends: 5286 [2019-10-15 00:03:47,746 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:03:47,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2019-10-15 00:03:47,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4710. [2019-10-15 00:03:47,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4710 states. [2019-10-15 00:03:47,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4710 states to 4710 states and 6126 transitions. [2019-10-15 00:03:47,947 INFO L78 Accepts]: Start accepts. Automaton has 4710 states and 6126 transitions. Word has length 173 [2019-10-15 00:03:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:47,948 INFO L462 AbstractCegarLoop]: Abstraction has 4710 states and 6126 transitions. [2019-10-15 00:03:47,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:03:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 4710 states and 6126 transitions. [2019-10-15 00:03:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-10-15 00:03:47,953 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:47,954 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-15 00:03:48,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:03:48,158 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:48,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:48,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1048573628, now seen corresponding path program 1 times [2019-10-15 00:03:48,159 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:48,160 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532489645] [2019-10-15 00:03:48,160 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:48,160 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:48,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 00:03:48,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532489645] [2019-10-15 00:03:48,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999825681] [2019-10-15 00:03:48,444 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 [2019-10-15 00:03:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:48,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 00:03:48,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:48,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:48,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:52,855 WARN L191 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-10-15 00:03:57,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 00:03:57,766 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:57,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:57,849 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:57,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:57,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:57,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [580506273] [2019-10-15 00:03:57,971 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 227 [2019-10-15 00:03:58,030 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:03:58,031 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)