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/Problem14_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:05:25,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:05:25,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:05:25,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:05:25,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:05:25,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:05:25,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:05:25,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:05:25,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:05:25,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:05:25,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:05:25,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:05:25,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:05:25,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:05:25,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:05:25,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:05:25,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:05:25,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:05:25,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:05:25,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:05:25,108 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 00:05:25,140 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:05:25,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:05:25,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:05:25,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:05:25,144 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:05:25,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:05:25,144 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:05:25,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:05:25,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:05:25,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:05:25,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:05:25,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:05:25,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:05:25,147 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:05:25,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:05:25,148 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:05:25,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:05:25,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:05:25,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:05:25,148 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:05:25,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:05:25,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:05:25,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:05:25,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:05:25,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:05:25,150 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:05:25,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:05:25,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:05:25,150 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 00:05:25,438 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:05:25,451 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:05:25,454 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:05:25,456 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:05:25,456 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:05:25,457 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label06.c [2019-10-15 00:05:25,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a42ed6f10/f8fb098cfeee4d628994478feadaa400/FLAG75e944e2f [2019-10-15 00:05:26,097 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:05:26,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label06.c [2019-10-15 00:05:26,113 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a42ed6f10/f8fb098cfeee4d628994478feadaa400/FLAG75e944e2f [2019-10-15 00:05:26,337 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a42ed6f10/f8fb098cfeee4d628994478feadaa400 [2019-10-15 00:05:26,345 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:05:26,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:05:26,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:26,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:05:26,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:05:26,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:26" (1/1) ... [2019-10-15 00:05:26,354 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 12:05:26, skipping insertion in model container [2019-10-15 00:05:26,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:26" (1/1) ... [2019-10-15 00:05:26,362 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:05:26,420 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:05:26,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:27,004 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:05:27,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:27,174 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:05:27,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:27 WrapperNode [2019-10-15 00:05:27,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:27,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:05:27,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:05:27,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:05:27,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:27" (1/1) ... [2019-10-15 00:05:27,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:27" (1/1) ... [2019-10-15 00:05:27,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:27" (1/1) ... [2019-10-15 00:05:27,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:27" (1/1) ... [2019-10-15 00:05:27,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:27" (1/1) ... [2019-10-15 00:05:27,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:27" (1/1) ... [2019-10-15 00:05:27,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:27" (1/1) ... [2019-10-15 00:05:27,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:05:27,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:05:27,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:05:27,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:05:27,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:27" (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 00:05:27,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:05:27,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:05:27,388 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:05:27,388 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:05:27,388 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:05:27,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:05:27,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:05:27,389 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:05:27,390 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:05:27,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:05:27,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:05:28,685 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:05:28,685 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:05:28,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:28 BoogieIcfgContainer [2019-10-15 00:05:28,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:05:28,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:05:28,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:05:28,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:05:28,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:05:26" (1/3) ... [2019-10-15 00:05:28,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d989d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:28, skipping insertion in model container [2019-10-15 00:05:28,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:27" (2/3) ... [2019-10-15 00:05:28,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d989d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:28, skipping insertion in model container [2019-10-15 00:05:28,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:28" (3/3) ... [2019-10-15 00:05:28,695 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label06.c [2019-10-15 00:05:28,704 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:05:28,712 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:05:28,723 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:05:28,751 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:05:28,751 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:05:28,751 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:05:28,752 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:05:28,752 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:05:28,752 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:05:28,752 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:05:28,752 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:05:28,777 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:05:28,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-15 00:05:28,787 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:28,788 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:28,789 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:28,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:28,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1258864990, now seen corresponding path program 1 times [2019-10-15 00:05:28,805 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:28,806 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285767526] [2019-10-15 00:05:28,806 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:28,806 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:28,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:29,196 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 00:05:29,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285767526] [2019-10-15 00:05:29,198 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:29,198 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:05:29,199 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335552701] [2019-10-15 00:05:29,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:05:29,205 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:29,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:05:29,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:05:29,221 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-15 00:05:31,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:31,431 INFO L93 Difference]: Finished difference Result 890 states and 1606 transitions. [2019-10-15 00:05:31,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:05:31,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2019-10-15 00:05:31,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:31,454 INFO L225 Difference]: With dead ends: 890 [2019-10-15 00:05:31,454 INFO L226 Difference]: Without dead ends: 554 [2019-10-15 00:05:31,464 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 00:05:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-15 00:05:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 372. [2019-10-15 00:05:31,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-15 00:05:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 524 transitions. [2019-10-15 00:05:31,543 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 524 transitions. Word has length 67 [2019-10-15 00:05:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:31,544 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 524 transitions. [2019-10-15 00:05:31,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:05:31,544 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 524 transitions. [2019-10-15 00:05:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-15 00:05:31,552 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:31,552 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:05:31,552 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:31,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:31,553 INFO L82 PathProgramCache]: Analyzing trace with hash -744258219, now seen corresponding path program 1 times [2019-10-15 00:05:31,553 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:31,553 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190290117] [2019-10-15 00:05:31,553 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:31,554 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:31,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:31,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190290117] [2019-10-15 00:05:31,754 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:31,754 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:05:31,754 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481449310] [2019-10-15 00:05:31,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:05:31,760 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:31,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:05:31,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:05:31,761 INFO L87 Difference]: Start difference. First operand 372 states and 524 transitions. Second operand 4 states. [2019-10-15 00:05:33,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:33,271 INFO L93 Difference]: Finished difference Result 1284 states and 1876 transitions. [2019-10-15 00:05:33,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:05:33,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2019-10-15 00:05:33,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:33,279 INFO L225 Difference]: With dead ends: 1284 [2019-10-15 00:05:33,279 INFO L226 Difference]: Without dead ends: 918 [2019-10-15 00:05:33,281 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 00:05:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2019-10-15 00:05:33,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 918. [2019-10-15 00:05:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918 states. [2019-10-15 00:05:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1267 transitions. [2019-10-15 00:05:33,333 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1267 transitions. Word has length 150 [2019-10-15 00:05:33,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:33,334 INFO L462 AbstractCegarLoop]: Abstraction has 918 states and 1267 transitions. [2019-10-15 00:05:33,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:05:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1267 transitions. [2019-10-15 00:05:33,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-15 00:05:33,342 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:33,343 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:05:33,343 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:33,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:33,344 INFO L82 PathProgramCache]: Analyzing trace with hash -576457814, now seen corresponding path program 1 times [2019-10-15 00:05:33,344 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:33,344 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561398155] [2019-10-15 00:05:33,344 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:33,345 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:33,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:33,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561398155] [2019-10-15 00:05:33,658 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:33,658 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:05:33,658 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382492854] [2019-10-15 00:05:33,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:05:33,659 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:33,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:05:33,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:05:33,660 INFO L87 Difference]: Start difference. First operand 918 states and 1267 transitions. Second operand 6 states. [2019-10-15 00:05:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:34,851 INFO L93 Difference]: Finished difference Result 2604 states and 3737 transitions. [2019-10-15 00:05:34,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:05:34,852 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 207 [2019-10-15 00:05:34,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:34,872 INFO L225 Difference]: With dead ends: 2604 [2019-10-15 00:05:34,872 INFO L226 Difference]: Without dead ends: 1692 [2019-10-15 00:05:34,876 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:05:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2019-10-15 00:05:34,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1670. [2019-10-15 00:05:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1670 states. [2019-10-15 00:05:34,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2239 transitions. [2019-10-15 00:05:34,969 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2239 transitions. Word has length 207 [2019-10-15 00:05:34,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:34,970 INFO L462 AbstractCegarLoop]: Abstraction has 1670 states and 2239 transitions. [2019-10-15 00:05:34,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:05:34,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2239 transitions. [2019-10-15 00:05:34,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-10-15 00:05:34,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:34,989 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:05:34,989 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:34,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:34,990 INFO L82 PathProgramCache]: Analyzing trace with hash 93311285, now seen corresponding path program 1 times [2019-10-15 00:05:34,990 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:34,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096137292] [2019-10-15 00:05:34,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:34,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:34,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:35,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096137292] [2019-10-15 00:05:35,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455867206] [2019-10-15 00:05:35,245 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 00:05:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:35,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:05:35,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:05:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:35,513 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:05:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:35,660 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [635925195] [2019-10-15 00:05:35,666 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 239 [2019-10-15 00:05:35,710 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:05:35,710 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:05:40,779 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:05:40,781 INFO L272 AbstractInterpreter]: Visited 100 different actions 100 times. Never merged. Never widened. Performed 239 root evaluator evaluations with a maximum evaluation depth of 13. Performed 239 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:05:40,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:40,784 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:05:45,199 INFO L227 lantSequenceWeakener]: Weakened 219 states. On average, predicates are now at 78.42% of their original sizes. [2019-10-15 00:05:45,199 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:05:45,266 INFO L553 sIntCurrentIteration]: We unified 237 AI predicates to 237 [2019-10-15 00:05:45,266 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:05:45,267 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:05:45,267 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 5, 5] total 19 [2019-10-15 00:05:45,267 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724638278] [2019-10-15 00:05:45,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 00:05:45,269 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:45,269 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:05:45,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 00:05:45,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:05:45,270 INFO L87 Difference]: Start difference. First operand 1670 states and 2239 transitions. Second operand 10 states.