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_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:02:36,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:02:36,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:02:36,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:02:36,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:02:36,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:02:36,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:02:36,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:02:36,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:02:36,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:02:36,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:02:36,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:02:36,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:02:36,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:02:36,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:02:36,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:02:36,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:02:36,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:02:36,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:02:36,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:02:36,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:02:36,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:02:36,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:02:36,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:02:36,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:02:36,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:02:36,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:02:36,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:02:36,899 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 00:02:36,913 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:02:36,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:02:36,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:02:36,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:02:36,915 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:02:36,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:02:36,915 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:02:36,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:02:36,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:02:36,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:02:36,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:02:36,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:02:36,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:02:36,916 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:02:36,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:02:36,917 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:02:36,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:02:36,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:02:36,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:02:36,918 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:02:36,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:02:36,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:02:36,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:02:36,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:02:36,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:02:36,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:02:36,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:02:36,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:02:36,919 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 00:02:37,232 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:02:37,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:02:37,249 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:02:37,250 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:02:37,251 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:02:37,252 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label07.c [2019-10-15 00:02:37,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aa87799a/4d47d47707d64d69b2ec1f692b40865a/FLAGa7ea67d5a [2019-10-15 00:02:38,006 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:02:38,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label07.c [2019-10-15 00:02:38,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aa87799a/4d47d47707d64d69b2ec1f692b40865a/FLAGa7ea67d5a [2019-10-15 00:02:38,192 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aa87799a/4d47d47707d64d69b2ec1f692b40865a [2019-10-15 00:02:38,203 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:02:38,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:02:38,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:38,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:02:38,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:02:38,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:38" (1/1) ... [2019-10-15 00:02:38,214 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 12:02:38, skipping insertion in model container [2019-10-15 00:02:38,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:38" (1/1) ... [2019-10-15 00:02:38,222 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:02:38,295 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:02:38,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:38,953 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:02:39,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:39,309 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:02:39,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:39 WrapperNode [2019-10-15 00:02:39,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:39,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:02:39,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:02:39,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:02:39,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:39" (1/1) ... [2019-10-15 00:02:39,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:39" (1/1) ... [2019-10-15 00:02:39,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:39" (1/1) ... [2019-10-15 00:02:39,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:39" (1/1) ... [2019-10-15 00:02:39,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:39" (1/1) ... [2019-10-15 00:02:39,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:39" (1/1) ... [2019-10-15 00:02:39,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:39" (1/1) ... [2019-10-15 00:02:39,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:02:39,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:02:39,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:02:39,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:02:39,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:39" (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 00:02:39,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:02:39,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:02:39,581 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:02:39,581 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:02:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:02:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:02:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:02:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:02:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:02:39,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:02:39,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:02:41,507 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:02:41,507 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:02:41,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:41 BoogieIcfgContainer [2019-10-15 00:02:41,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:02:41,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:02:41,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:02:41,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:02:41,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:02:38" (1/3) ... [2019-10-15 00:02:41,515 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 12:02:41, skipping insertion in model container [2019-10-15 00:02:41,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:39" (2/3) ... [2019-10-15 00:02:41,516 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 12:02:41, skipping insertion in model container [2019-10-15 00:02:41,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:41" (3/3) ... [2019-10-15 00:02:41,518 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label07.c [2019-10-15 00:02:41,528 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:02:41,540 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:02:41,552 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:02:41,593 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:02:41,593 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:02:41,594 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:02:41,594 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:02:41,594 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:02:41,594 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:02:41,594 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:02:41,595 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:02:41,634 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:02:41,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 00:02:41,641 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:41,642 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] [2019-10-15 00:02:41,644 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:41,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:41,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1280127794, now seen corresponding path program 1 times [2019-10-15 00:02:41,656 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:41,657 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226995990] [2019-10-15 00:02:41,657 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:41,657 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:41,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:42,023 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 00:02:42,023 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226995990] [2019-10-15 00:02:42,024 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:42,025 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:02:42,025 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500338649] [2019-10-15 00:02:42,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:42,032 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:42,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:42,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:42,050 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-15 00:02:44,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:44,366 INFO L93 Difference]: Finished difference Result 981 states and 1757 transitions. [2019-10-15 00:02:44,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:02:44,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-10-15 00:02:44,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:44,389 INFO L225 Difference]: With dead ends: 981 [2019-10-15 00:02:44,389 INFO L226 Difference]: Without dead ends: 622 [2019-10-15 00:02:44,399 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 00:02:44,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-10-15 00:02:44,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-10-15 00:02:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-10-15 00:02:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 880 transitions. [2019-10-15 00:02:44,489 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 880 transitions. Word has length 29 [2019-10-15 00:02:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:44,489 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 880 transitions. [2019-10-15 00:02:44,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 880 transitions. [2019-10-15 00:02:44,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-15 00:02:44,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:44,497 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:44,497 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:44,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:44,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1981199134, now seen corresponding path program 1 times [2019-10-15 00:02:44,499 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:44,499 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947062887] [2019-10-15 00:02:44,499 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:44,499 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:44,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:44,756 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947062887] [2019-10-15 00:02:44,757 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:44,757 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:44,757 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187523223] [2019-10-15 00:02:44,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:44,759 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:44,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:44,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:44,760 INFO L87 Difference]: Start difference. First operand 622 states and 880 transitions. Second operand 6 states. [2019-10-15 00:02:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:46,699 INFO L93 Difference]: Finished difference Result 1837 states and 2643 transitions. [2019-10-15 00:02:46,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:46,699 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2019-10-15 00:02:46,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:46,708 INFO L225 Difference]: With dead ends: 1837 [2019-10-15 00:02:46,708 INFO L226 Difference]: Without dead ends: 1221 [2019-10-15 00:02:46,711 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:02:46,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2019-10-15 00:02:46,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1210. [2019-10-15 00:02:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2019-10-15 00:02:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1600 transitions. [2019-10-15 00:02:46,788 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1600 transitions. Word has length 109 [2019-10-15 00:02:46,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:46,789 INFO L462 AbstractCegarLoop]: Abstraction has 1210 states and 1600 transitions. [2019-10-15 00:02:46,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1600 transitions. [2019-10-15 00:02:46,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-15 00:02:46,798 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:46,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:46,799 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:46,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1129088726, now seen corresponding path program 1 times [2019-10-15 00:02:46,802 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:46,802 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406704786] [2019-10-15 00:02:46,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:46,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:46,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:47,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406704786] [2019-10-15 00:02:47,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795378654] [2019-10-15 00:02:47,146 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 00:02:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:47,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:02:47,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:47,383 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:47,503 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:02:47,503 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-15 00:02:47,504 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252201579] [2019-10-15 00:02:47,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:02:47,507 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:47,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:02:47,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:02:47,508 INFO L87 Difference]: Start difference. First operand 1210 states and 1600 transitions. Second operand 3 states. [2019-10-15 00:02:48,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:48,591 INFO L93 Difference]: Finished difference Result 3206 states and 4334 transitions. [2019-10-15 00:02:48,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:02:48,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2019-10-15 00:02:48,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:48,613 INFO L225 Difference]: With dead ends: 3206 [2019-10-15 00:02:48,613 INFO L226 Difference]: Without dead ends: 2002 [2019-10-15 00:02:48,618 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 320 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:02:48,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2019-10-15 00:02:48,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1997. [2019-10-15 00:02:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1997 states. [2019-10-15 00:02:48,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 2602 transitions. [2019-10-15 00:02:48,690 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 2602 transitions. Word has length 160 [2019-10-15 00:02:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:48,692 INFO L462 AbstractCegarLoop]: Abstraction has 1997 states and 2602 transitions. [2019-10-15 00:02:48,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:02:48,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 2602 transitions. [2019-10-15 00:02:48,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-15 00:02:48,698 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:48,699 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:02:48,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:48,904 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:48,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:48,905 INFO L82 PathProgramCache]: Analyzing trace with hash -38341886, now seen corresponding path program 1 times [2019-10-15 00:02:48,905 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:48,905 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969845645] [2019-10-15 00:02:48,906 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:48,906 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:48,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 44 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:02:49,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969845645] [2019-10-15 00:02:49,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629926517] [2019-10-15 00:02:49,083 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 00:02:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:49,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:02:49,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-15 00:02:49,315 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 44 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:02:49,430 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:02:49,430 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:02:49,430 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881681912] [2019-10-15 00:02:49,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:02:49,431 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:49,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:02:49,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:02:49,432 INFO L87 Difference]: Start difference. First operand 1997 states and 2602 transitions. Second operand 5 states. [2019-10-15 00:02:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:51,088 INFO L93 Difference]: Finished difference Result 5998 states and 8098 transitions. [2019-10-15 00:02:51,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:51,089 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 181 [2019-10-15 00:02:51,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:51,119 INFO L225 Difference]: With dead ends: 5998 [2019-10-15 00:02:51,120 INFO L226 Difference]: Without dead ends: 4007 [2019-10-15 00:02:51,127 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 358 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:02:51,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2019-10-15 00:02:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3957. [2019-10-15 00:02:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3957 states. [2019-10-15 00:02:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3957 states to 3957 states and 5157 transitions. [2019-10-15 00:02:51,263 INFO L78 Accepts]: Start accepts. Automaton has 3957 states and 5157 transitions. Word has length 181 [2019-10-15 00:02:51,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:51,263 INFO L462 AbstractCegarLoop]: Abstraction has 3957 states and 5157 transitions. [2019-10-15 00:02:51,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:02:51,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3957 states and 5157 transitions. [2019-10-15 00:02:51,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-15 00:02:51,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:51,268 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:02:51,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:51,473 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:51,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:51,474 INFO L82 PathProgramCache]: Analyzing trace with hash -658879439, now seen corresponding path program 1 times [2019-10-15 00:02:51,474 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:51,474 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429890980] [2019-10-15 00:02:51,474 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:51,474 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:51,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-15 00:02:51,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429890980] [2019-10-15 00:02:51,630 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:51,630 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:02:51,630 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415497132] [2019-10-15 00:02:51,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:51,632 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:51,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:51,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:51,632 INFO L87 Difference]: Start difference. First operand 3957 states and 5157 transitions. Second operand 4 states. [2019-10-15 00:02:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:53,513 INFO L93 Difference]: Finished difference Result 10230 states and 13948 transitions. [2019-10-15 00:02:53,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:02:53,513 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 182 [2019-10-15 00:02:53,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:53,551 INFO L225 Difference]: With dead ends: 10230 [2019-10-15 00:02:53,552 INFO L226 Difference]: Without dead ends: 6467 [2019-10-15 00:02:53,564 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 00:02:53,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6467 states. [2019-10-15 00:02:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6467 to 6064. [2019-10-15 00:02:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6064 states. [2019-10-15 00:02:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6064 states to 6064 states and 8106 transitions. [2019-10-15 00:02:53,762 INFO L78 Accepts]: Start accepts. Automaton has 6064 states and 8106 transitions. Word has length 182 [2019-10-15 00:02:53,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:53,762 INFO L462 AbstractCegarLoop]: Abstraction has 6064 states and 8106 transitions. [2019-10-15 00:02:53,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:53,763 INFO L276 IsEmpty]: Start isEmpty. Operand 6064 states and 8106 transitions. [2019-10-15 00:02:53,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2019-10-15 00:02:53,773 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:53,774 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:53,774 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:53,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:53,775 INFO L82 PathProgramCache]: Analyzing trace with hash -45401431, now seen corresponding path program 1 times [2019-10-15 00:02:53,775 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:53,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775981532] [2019-10-15 00:02:53,775 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:53,775 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:53,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:54,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775981532] [2019-10-15 00:02:54,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38696003] [2019-10-15 00:02:54,107 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 00:02:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:54,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 00:02:54,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:54,299 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:54,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1445681355] [2019-10-15 00:02:54,492 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 261 [2019-10-15 00:02:54,555 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:02:54,555 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)