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_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:03:13,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:03:13,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:03:13,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:03:13,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:03:13,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:03:13,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:03:13,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:03:13,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:03:13,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:03:13,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:03:13,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:03:13,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:03:13,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:03:13,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:03:13,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:03:13,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:03:13,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:03:13,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:03:13,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:03:13,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:03:13,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:03:13,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:03:13,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:03:13,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:03:13,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:03:13,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:03:13,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:03:13,437 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 00:03:13,463 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:03:13,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:03:13,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:03:13,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:03:13,466 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:03:13,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:03:13,467 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:03:13,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:03:13,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:03:13,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:03:13,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:03:13,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:03:13,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:03:13,468 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:03:13,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:03:13,468 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:03:13,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:03:13,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:03:13,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:03:13,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:03:13,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:03:13,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:03:13,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:03:13,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:03:13,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:03:13,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:03:13,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:03:13,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:03:13,471 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 00:03:13,780 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:03:13,793 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:03:13,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:03:13,799 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:03:13,800 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:03:13,800 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label21.c [2019-10-15 00:03:13,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/652ea3bcc/e7c1b513ff22440bab97e13fa51a88a4/FLAGa71b458f9 [2019-10-15 00:03:14,507 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:03:14,508 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label21.c [2019-10-15 00:03:14,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/652ea3bcc/e7c1b513ff22440bab97e13fa51a88a4/FLAGa71b458f9 [2019-10-15 00:03:14,716 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/652ea3bcc/e7c1b513ff22440bab97e13fa51a88a4 [2019-10-15 00:03:14,727 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:03:14,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:03:14,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:14,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:03:14,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:03:14,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:14" (1/1) ... [2019-10-15 00:03:14,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bb6eee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:14, skipping insertion in model container [2019-10-15 00:03:14,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:14" (1/1) ... [2019-10-15 00:03:14,746 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:03:14,816 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:03:15,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:03:15,636 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:03:15,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:03:16,002 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:03:16,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:16 WrapperNode [2019-10-15 00:03:16,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:16,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:03:16,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:03:16,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:03:16,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:16" (1/1) ... [2019-10-15 00:03:16,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:16" (1/1) ... [2019-10-15 00:03:16,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:16" (1/1) ... [2019-10-15 00:03:16,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:16" (1/1) ... [2019-10-15 00:03:16,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:16" (1/1) ... [2019-10-15 00:03:16,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:16" (1/1) ... [2019-10-15 00:03:16,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:16" (1/1) ... [2019-10-15 00:03:16,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:03:16,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:03:16,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:03:16,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:03:16,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:16" (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 00:03:16,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:03:16,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:03:16,256 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:03:16,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:03:16,257 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:03:16,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:03:16,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:03:16,258 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:03:16,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:03:16,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:03:16,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:03:18,250 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:03:18,250 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:03:18,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:18 BoogieIcfgContainer [2019-10-15 00:03:18,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:03:18,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:03:18,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:03:18,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:03:18,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:03:14" (1/3) ... [2019-10-15 00:03:18,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5ff45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:18, skipping insertion in model container [2019-10-15 00:03:18,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:16" (2/3) ... [2019-10-15 00:03:18,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5ff45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:18, skipping insertion in model container [2019-10-15 00:03:18,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:18" (3/3) ... [2019-10-15 00:03:18,263 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label21.c [2019-10-15 00:03:18,279 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:03:18,291 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:03:18,308 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:03:18,344 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:03:18,345 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:03:18,345 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:03:18,345 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:03:18,346 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:03:18,346 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:03:18,346 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:03:18,346 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:03:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:03:18,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 00:03:18,390 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:18,392 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, 1, 1, 1, 1] [2019-10-15 00:03:18,394 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:18,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:18,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1029260131, now seen corresponding path program 1 times [2019-10-15 00:03:18,417 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:18,418 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226995990] [2019-10-15 00:03:18,418 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:18,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:18,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:18,850 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 00:03:18,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226995990] [2019-10-15 00:03:18,853 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:18,853 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:03:18,853 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500338649] [2019-10-15 00:03:18,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:03:18,861 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:18,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:03:18,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:03:18,881 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-15 00:03:21,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:21,096 INFO L93 Difference]: Finished difference Result 978 states and 1754 transitions. [2019-10-15 00:03:21,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:03:21,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-10-15 00:03:21,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:21,121 INFO L225 Difference]: With dead ends: 978 [2019-10-15 00:03:21,122 INFO L226 Difference]: Without dead ends: 619 [2019-10-15 00:03:21,163 INFO L600 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 [2019-10-15 00:03:21,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2019-10-15 00:03:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2019-10-15 00:03:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2019-10-15 00:03:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 859 transitions. [2019-10-15 00:03:21,316 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 859 transitions. Word has length 30 [2019-10-15 00:03:21,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:21,317 INFO L462 AbstractCegarLoop]: Abstraction has 619 states and 859 transitions. [2019-10-15 00:03:21,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:03:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 859 transitions. [2019-10-15 00:03:21,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-15 00:03:21,327 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:21,329 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:03:21,329 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:21,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:21,330 INFO L82 PathProgramCache]: Analyzing trace with hash -27309419, now seen corresponding path program 1 times [2019-10-15 00:03:21,331 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:21,331 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408546999] [2019-10-15 00:03:21,331 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:21,331 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:21,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:21,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408546999] [2019-10-15 00:03:21,583 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:21,583 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:03:21,584 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260805575] [2019-10-15 00:03:21,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:03:21,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:21,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:03:21,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:03:21,592 INFO L87 Difference]: Start difference. First operand 619 states and 859 transitions. Second operand 4 states. [2019-10-15 00:03:23,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:23,568 INFO L93 Difference]: Finished difference Result 2380 states and 3384 transitions. [2019-10-15 00:03:23,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:03:23,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2019-10-15 00:03:23,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:23,581 INFO L225 Difference]: With dead ends: 2380 [2019-10-15 00:03:23,581 INFO L226 Difference]: Without dead ends: 1767 [2019-10-15 00:03:23,584 INFO L600 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 [2019-10-15 00:03:23,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2019-10-15 00:03:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1563. [2019-10-15 00:03:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1563 states. [2019-10-15 00:03:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2115 transitions. [2019-10-15 00:03:23,641 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2115 transitions. Word has length 103 [2019-10-15 00:03:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:23,642 INFO L462 AbstractCegarLoop]: Abstraction has 1563 states and 2115 transitions. [2019-10-15 00:03:23,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:03:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2115 transitions. [2019-10-15 00:03:23,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 00:03:23,645 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:23,645 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:03:23,645 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:23,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:23,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1916245598, now seen corresponding path program 1 times [2019-10-15 00:03:23,646 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:23,646 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045476727] [2019-10-15 00:03:23,646 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:23,647 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:23,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:23,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045476727] [2019-10-15 00:03:23,744 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:23,744 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:03:23,744 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325058863] [2019-10-15 00:03:23,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:03:23,745 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:23,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:03:23,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:03:23,746 INFO L87 Difference]: Start difference. First operand 1563 states and 2115 transitions. Second operand 4 states. [2019-10-15 00:03:25,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:25,524 INFO L93 Difference]: Finished difference Result 5756 states and 8079 transitions. [2019-10-15 00:03:25,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:03:25,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2019-10-15 00:03:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:25,551 INFO L225 Difference]: With dead ends: 5756 [2019-10-15 00:03:25,551 INFO L226 Difference]: Without dead ends: 4199 [2019-10-15 00:03:25,557 INFO L600 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 [2019-10-15 00:03:25,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2019-10-15 00:03:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 4197. [2019-10-15 00:03:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4197 states. [2019-10-15 00:03:25,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4197 states to 4197 states and 5525 transitions. [2019-10-15 00:03:25,711 INFO L78 Accepts]: Start accepts. Automaton has 4197 states and 5525 transitions. Word has length 104 [2019-10-15 00:03:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:25,713 INFO L462 AbstractCegarLoop]: Abstraction has 4197 states and 5525 transitions. [2019-10-15 00:03:25,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:03:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 4197 states and 5525 transitions. [2019-10-15 00:03:25,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-10-15 00:03:25,735 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:25,736 INFO L380 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:03:25,736 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:25,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:25,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1953610746, now seen corresponding path program 1 times [2019-10-15 00:03:25,737 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:25,738 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598068917] [2019-10-15 00:03:25,738 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:25,738 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:25,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 46 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:03:25,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598068917] [2019-10-15 00:03:25,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166193341] [2019-10-15 00:03:25,959 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 00:03:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:26,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:03:26,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 00:03:26,248 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 46 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:03:26,387 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:03:26,387 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2019-10-15 00:03:26,388 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289492904] [2019-10-15 00:03:26,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:03:26,390 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:26,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:03:26,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:03:26,392 INFO L87 Difference]: Start difference. First operand 4197 states and 5525 transitions. Second operand 5 states. [2019-10-15 00:03:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:28,229 INFO L93 Difference]: Finished difference Result 9620 states and 13107 transitions. [2019-10-15 00:03:28,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:03:28,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 201 [2019-10-15 00:03:28,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:28,254 INFO L225 Difference]: With dead ends: 9620 [2019-10-15 00:03:28,255 INFO L226 Difference]: Without dead ends: 5429 [2019-10-15 00:03:28,266 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 400 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:03:28,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5429 states. [2019-10-15 00:03:28,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5429 to 5230. [2019-10-15 00:03:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5230 states. [2019-10-15 00:03:28,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5230 states to 5230 states and 6975 transitions. [2019-10-15 00:03:28,410 INFO L78 Accepts]: Start accepts. Automaton has 5230 states and 6975 transitions. Word has length 201 [2019-10-15 00:03:28,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:28,411 INFO L462 AbstractCegarLoop]: Abstraction has 5230 states and 6975 transitions. [2019-10-15 00:03:28,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:03:28,411 INFO L276 IsEmpty]: Start isEmpty. Operand 5230 states and 6975 transitions. [2019-10-15 00:03:28,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-10-15 00:03:28,418 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:28,418 INFO L380 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:03:28,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:03:28,629 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:28,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:28,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1376578934, now seen corresponding path program 1 times [2019-10-15 00:03:28,630 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:28,631 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646462147] [2019-10-15 00:03:28,632 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:28,632 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:28,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:28,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646462147] [2019-10-15 00:03:28,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050401973] [2019-10-15 00:03:28,865 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 00:03:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:28,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:03:28,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-15 00:03:29,075 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-15 00:03:29,140 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:03:29,141 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-15 00:03:29,141 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758976292] [2019-10-15 00:03:29,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:03:29,143 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:29,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:03:29,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:03:29,144 INFO L87 Difference]: Start difference. First operand 5230 states and 6975 transitions. Second operand 3 states. [2019-10-15 00:03:30,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:30,379 INFO L93 Difference]: Finished difference Result 11973 states and 16364 transitions. [2019-10-15 00:03:30,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:03:30,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 209 [2019-10-15 00:03:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:30,426 INFO L225 Difference]: With dead ends: 11973 [2019-10-15 00:03:30,426 INFO L226 Difference]: Without dead ends: 6749 [2019-10-15 00:03:30,447 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 417 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:03:30,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6749 states. [2019-10-15 00:03:30,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6749 to 6749. [2019-10-15 00:03:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6749 states. [2019-10-15 00:03:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 8974 transitions. [2019-10-15 00:03:30,685 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 8974 transitions. Word has length 209 [2019-10-15 00:03:30,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:30,685 INFO L462 AbstractCegarLoop]: Abstraction has 6749 states and 8974 transitions. [2019-10-15 00:03:30,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:03:30,686 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 8974 transitions. [2019-10-15 00:03:30,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2019-10-15 00:03:30,702 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:30,702 INFO L380 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:03:30,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:03:30,908 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:30,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:30,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1652933715, now seen corresponding path program 1 times [2019-10-15 00:03:30,909 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:30,910 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523451598] [2019-10-15 00:03:30,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:30,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:30,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:31,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523451598] [2019-10-15 00:03:31,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691675952] [2019-10-15 00:03:31,180 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 00:03:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:31,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 00:03:31,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-15 00:03:31,449 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-15 00:03:31,553 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:03:31,554 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 10 [2019-10-15 00:03:31,554 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74282391] [2019-10-15 00:03:31,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:03:31,555 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:31,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:03:31,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:03:31,556 INFO L87 Difference]: Start difference. First operand 6749 states and 8974 transitions. Second operand 6 states. [2019-10-15 00:03:55,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:55,262 INFO L93 Difference]: Finished difference Result 20179 states and 27422 transitions. [2019-10-15 00:03:55,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 00:03:55,262 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 293 [2019-10-15 00:03:55,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:55,263 INFO L225 Difference]: With dead ends: 20179 [2019-10-15 00:03:55,263 INFO L226 Difference]: Without dead ends: 0 [2019-10-15 00:03:55,311 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 581 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:03:55,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-15 00:03:55,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-15 00:03:55,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-15 00:03:55,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-15 00:03:55,313 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 293 [2019-10-15 00:03:55,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:55,313 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-15 00:03:55,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:03:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-15 00:03:55,314 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.