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/Problem10_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:02:18,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:02:18,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:02:18,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:02:18,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:02:18,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:02:18,735 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:02:18,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:02:18,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:02:18,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:02:18,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:02:18,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:02:18,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:02:18,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:02:18,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:02:18,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:02:18,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:02:18,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:02:18,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:02:18,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:02:18,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:02:18,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:02:18,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:02:18,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:02:18,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:02:18,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:02:18,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:02:18,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:02:18,770 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 00:02:18,790 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:02:18,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:02:18,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:02:18,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:02:18,793 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:02:18,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:02:18,793 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:02:18,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:02:18,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:02:18,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:02:18,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:02:18,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:02:18,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:02:18,796 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:02:18,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:02:18,796 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:02:18,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:02:18,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:02:18,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:02:18,797 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:02:18,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:02:18,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:02:18,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:02:18,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:02:18,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:02:18,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:02:18,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:02:18,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:02:18,799 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 00:02:19,109 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:02:19,126 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:02:19,129 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:02:19,130 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:02:19,131 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:02:19,131 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label56.c [2019-10-15 00:02:19,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f76bf59d8/517e2e1fb1ab4a65b6552b0d11cc315e/FLAG690926eff [2019-10-15 00:02:19,799 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:02:19,801 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label56.c [2019-10-15 00:02:19,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f76bf59d8/517e2e1fb1ab4a65b6552b0d11cc315e/FLAG690926eff [2019-10-15 00:02:20,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f76bf59d8/517e2e1fb1ab4a65b6552b0d11cc315e [2019-10-15 00:02:20,055 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:02:20,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:02:20,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:20,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:02:20,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:02:20,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:20" (1/1) ... [2019-10-15 00:02:20,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a25795a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:20, skipping insertion in model container [2019-10-15 00:02:20,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:20" (1/1) ... [2019-10-15 00:02:20,077 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:02:20,138 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:02:20,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:20,667 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:02:20,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:20,826 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:02:20,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:20 WrapperNode [2019-10-15 00:02:20,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:20,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:02:20,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:02:20,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:02:20,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:20" (1/1) ... [2019-10-15 00:02:20,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:20" (1/1) ... [2019-10-15 00:02:20,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:20" (1/1) ... [2019-10-15 00:02:20,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:20" (1/1) ... [2019-10-15 00:02:20,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:20" (1/1) ... [2019-10-15 00:02:20,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:20" (1/1) ... [2019-10-15 00:02:20,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:20" (1/1) ... [2019-10-15 00:02:20,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:02:20,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:02:20,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:02:20,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:02:20,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:20" (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 00:02:21,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:02:21,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:02:21,025 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:02:21,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:02:21,025 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:02:21,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:02:21,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:02:21,026 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:02:21,026 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:02:21,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:02:21,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:02:22,246 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:02:22,246 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:02:22,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:22 BoogieIcfgContainer [2019-10-15 00:02:22,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:02:22,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:02:22,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:02:22,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:02:22,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:02:20" (1/3) ... [2019-10-15 00:02:22,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e14d842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:22, skipping insertion in model container [2019-10-15 00:02:22,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:20" (2/3) ... [2019-10-15 00:02:22,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e14d842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:22, skipping insertion in model container [2019-10-15 00:02:22,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:22" (3/3) ... [2019-10-15 00:02:22,258 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label56.c [2019-10-15 00:02:22,270 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:02:22,280 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:02:22,293 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:02:22,321 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:02:22,322 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:02:22,322 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:02:22,322 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:02:22,322 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:02:22,323 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:02:22,323 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:02:22,323 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:02:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:02:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 00:02:22,355 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:22,356 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 00:02:22,358 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:22,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1758937742, now seen corresponding path program 1 times [2019-10-15 00:02:22,374 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:22,374 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954819221] [2019-10-15 00:02:22,374 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:22,375 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:22,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:22,663 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 00:02:22,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954819221] [2019-10-15 00:02:22,669 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:22,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:02:22,670 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882451397] [2019-10-15 00:02:22,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:02:22,677 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:22,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:02:22,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:02:22,695 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-15 00:02:23,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:23,716 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-15 00:02:23,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:02:23,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-10-15 00:02:23,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:23,752 INFO L225 Difference]: With dead ends: 571 [2019-10-15 00:02:23,753 INFO L226 Difference]: Without dead ends: 294 [2019-10-15 00:02:23,768 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:02:23,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-15 00:02:23,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-15 00:02:23,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-15 00:02:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 436 transitions. [2019-10-15 00:02:23,886 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 436 transitions. Word has length 29 [2019-10-15 00:02:23,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:23,886 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 436 transitions. [2019-10-15 00:02:23,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:02:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 436 transitions. [2019-10-15 00:02:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 00:02:23,892 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:23,892 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] [2019-10-15 00:02:23,893 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:23,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:23,893 INFO L82 PathProgramCache]: Analyzing trace with hash 30670753, now seen corresponding path program 1 times [2019-10-15 00:02:23,894 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:23,894 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009350123] [2019-10-15 00:02:23,894 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:23,894 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:23,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:02:24,172 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009350123] [2019-10-15 00:02:24,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662662076] [2019-10-15 00:02:24,173 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 00:02:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:24,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:02:24,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:24,333 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 00:02:24,333 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:24,413 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 00:02:24,414 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:02:24,414 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-15 00:02:24,415 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725996107] [2019-10-15 00:02:24,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:02:24,420 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:24,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:02:24,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:02:24,420 INFO L87 Difference]: Start difference. First operand 294 states and 436 transitions. Second operand 3 states. [2019-10-15 00:02:24,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:24,964 INFO L93 Difference]: Finished difference Result 582 states and 874 transitions. [2019-10-15 00:02:24,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:02:24,964 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2019-10-15 00:02:24,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:24,969 INFO L225 Difference]: With dead ends: 582 [2019-10-15 00:02:24,969 INFO L226 Difference]: Without dead ends: 580 [2019-10-15 00:02:24,970 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 233 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:02:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2019-10-15 00:02:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 437. [2019-10-15 00:02:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-10-15 00:02:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 658 transitions. [2019-10-15 00:02:25,007 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 658 transitions. Word has length 116 [2019-10-15 00:02:25,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:25,010 INFO L462 AbstractCegarLoop]: Abstraction has 437 states and 658 transitions. [2019-10-15 00:02:25,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:02:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 658 transitions. [2019-10-15 00:02:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 00:02:25,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:25,022 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] [2019-10-15 00:02:25,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:25,229 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:25,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:25,230 INFO L82 PathProgramCache]: Analyzing trace with hash 644320205, now seen corresponding path program 1 times [2019-10-15 00:02:25,230 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:25,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753262378] [2019-10-15 00:02:25,231 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:25,232 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:25,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:25,440 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 00:02:25,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753262378] [2019-10-15 00:02:25,441 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:25,441 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:02:25,441 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845906746] [2019-10-15 00:02:25,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:02:25,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:25,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:02:25,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:02:25,452 INFO L87 Difference]: Start difference. First operand 437 states and 658 transitions. Second operand 5 states. [2019-10-15 00:02:26,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:26,504 INFO L93 Difference]: Finished difference Result 1327 states and 2033 transitions. [2019-10-15 00:02:26,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:02:26,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2019-10-15 00:02:26,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:26,511 INFO L225 Difference]: With dead ends: 1327 [2019-10-15 00:02:26,512 INFO L226 Difference]: Without dead ends: 896 [2019-10-15 00:02:26,513 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:02:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2019-10-15 00:02:26,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 886. [2019-10-15 00:02:26,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2019-10-15 00:02:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1296 transitions. [2019-10-15 00:02:26,551 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1296 transitions. Word has length 154 [2019-10-15 00:02:26,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:26,552 INFO L462 AbstractCegarLoop]: Abstraction has 886 states and 1296 transitions. [2019-10-15 00:02:26,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:02:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1296 transitions. [2019-10-15 00:02:26,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-15 00:02:26,557 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:26,558 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, 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] [2019-10-15 00:02:26,558 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:26,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:26,558 INFO L82 PathProgramCache]: Analyzing trace with hash 171733525, now seen corresponding path program 1 times [2019-10-15 00:02:26,559 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:26,559 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822810466] [2019-10-15 00:02:26,559 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:26,559 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:26,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 44 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:02:26,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822810466] [2019-10-15 00:02:26,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094601564] [2019-10-15 00:02:26,758 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 00:02:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:26,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:02:26,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-15 00:02:26,955 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 44 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:02:27,079 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:02:27,079 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-15 00:02:27,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980483398] [2019-10-15 00:02:27,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:02:27,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:27,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:02:27,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:02:27,082 INFO L87 Difference]: Start difference. First operand 886 states and 1296 transitions. Second operand 5 states. [2019-10-15 00:02:28,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:28,008 INFO L93 Difference]: Finished difference Result 2096 states and 3158 transitions. [2019-10-15 00:02:28,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:28,009 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2019-10-15 00:02:28,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:28,016 INFO L225 Difference]: With dead ends: 2096 [2019-10-15 00:02:28,016 INFO L226 Difference]: Without dead ends: 1216 [2019-10-15 00:02:28,019 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 422 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-15 00:02:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2019-10-15 00:02:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1192. [2019-10-15 00:02:28,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-10-15 00:02:28,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1614 transitions. [2019-10-15 00:02:28,058 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1614 transitions. Word has length 214 [2019-10-15 00:02:28,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:28,059 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1614 transitions. [2019-10-15 00:02:28,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:02:28,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1614 transitions. [2019-10-15 00:02:28,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-10-15 00:02:28,064 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:28,065 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, 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] [2019-10-15 00:02:28,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:28,269 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:28,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:28,269 INFO L82 PathProgramCache]: Analyzing trace with hash -499290238, now seen corresponding path program 1 times [2019-10-15 00:02:28,270 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:28,270 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107982143] [2019-10-15 00:02:28,270 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:28,270 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:28,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-15 00:02:28,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107982143] [2019-10-15 00:02:28,434 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:28,434 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:02:28,434 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615996028] [2019-10-15 00:02:28,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:28,437 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:28,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:28,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:28,437 INFO L87 Difference]: Start difference. First operand 1192 states and 1614 transitions. Second operand 4 states. [2019-10-15 00:02:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:29,540 INFO L93 Difference]: Finished difference Result 3534 states and 4977 transitions. [2019-10-15 00:02:29,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:02:29,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 215 [2019-10-15 00:02:29,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:29,556 INFO L225 Difference]: With dead ends: 3534 [2019-10-15 00:02:29,556 INFO L226 Difference]: Without dead ends: 2348 [2019-10-15 00:02:29,560 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 00:02:29,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2019-10-15 00:02:29,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2060. [2019-10-15 00:02:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2060 states. [2019-10-15 00:02:29,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 2802 transitions. [2019-10-15 00:02:29,628 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 2802 transitions. Word has length 215 [2019-10-15 00:02:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:29,628 INFO L462 AbstractCegarLoop]: Abstraction has 2060 states and 2802 transitions. [2019-10-15 00:02:29,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:29,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 2802 transitions. [2019-10-15 00:02:29,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-10-15 00:02:29,635 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:29,636 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, 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] [2019-10-15 00:02:29,636 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:29,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:29,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1918826263, now seen corresponding path program 1 times [2019-10-15 00:02:29,637 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:29,637 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229029587] [2019-10-15 00:02:29,637 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:29,638 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:29,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 44 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:02:29,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229029587] [2019-10-15 00:02:29,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914481897] [2019-10-15 00:02:29,791 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 00:02:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:29,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:02:29,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-15 00:02:29,998 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 44 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:02:30,122 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:02:30,123 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:02:30,123 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919613770] [2019-10-15 00:02:30,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:02:30,124 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:30,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:02:30,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:02:30,125 INFO L87 Difference]: Start difference. First operand 2060 states and 2802 transitions. Second operand 5 states. [2019-10-15 00:02:31,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:31,021 INFO L93 Difference]: Finished difference Result 5016 states and 7033 transitions. [2019-10-15 00:02:31,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:02:31,022 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 244 [2019-10-15 00:02:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:31,037 INFO L225 Difference]: With dead ends: 5016 [2019-10-15 00:02:31,038 INFO L226 Difference]: Without dead ends: 2962 [2019-10-15 00:02:31,043 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 484 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:02:31,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2019-10-15 00:02:31,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2662. [2019-10-15 00:02:31,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2662 states. [2019-10-15 00:02:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3604 transitions. [2019-10-15 00:02:31,124 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3604 transitions. Word has length 244 [2019-10-15 00:02:31,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:31,124 INFO L462 AbstractCegarLoop]: Abstraction has 2662 states and 3604 transitions. [2019-10-15 00:02:31,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:02:31,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3604 transitions. [2019-10-15 00:02:31,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2019-10-15 00:02:31,131 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:31,132 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:31,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:31,337 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:31,338 INFO L82 PathProgramCache]: Analyzing trace with hash -324525238, now seen corresponding path program 1 times [2019-10-15 00:02:31,338 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:31,338 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449734469] [2019-10-15 00:02:31,338 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:31,338 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:31,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-15 00:02:31,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449734469] [2019-10-15 00:02:31,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061936548] [2019-10-15 00:02:31,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:31,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:02:31,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:31,802 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:31,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [545876928] [2019-10-15 00:02:31,911 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 250 [2019-10-15 00:02:31,967 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:02:31,967 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:02:43,398 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.