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_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:07:29,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:07:29,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:07:29,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-13 20:07:29,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:07:29,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:07:29,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:07:29,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:07:29,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:07:29,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:07:29,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:07:29,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:07:29,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:07:29,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:07:29,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:07:29,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:07:29,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:07:29,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:07:29,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:07:29,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:07:29,831 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 [2019-10-13 20:07:29,852 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:07:29,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:07:29,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:07:29,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:07:29,855 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:07:29,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:07:29,856 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:07:29,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:07:29,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:07:29,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:07:29,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:07:29,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:07:29,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:07:29,858 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:07:29,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:07:29,859 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:07:29,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:07:29,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:07:29,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:07:29,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:07:29,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:07:29,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:29,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:07:29,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:07:29,861 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:07:29,861 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:07:29,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:07:29,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:07:29,861 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 [2019-10-13 20:07:30,168 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:07:30,187 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:07:30,191 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:07:30,193 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:07:30,193 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:07:30,194 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label45.c [2019-10-13 20:07:30,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad18ff1fd/f4a20d95aa044123930f484ec4c0bd79/FLAG72f8976f3 [2019-10-13 20:07:30,838 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:07:30,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label45.c [2019-10-13 20:07:30,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad18ff1fd/f4a20d95aa044123930f484ec4c0bd79/FLAG72f8976f3 [2019-10-13 20:07:31,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad18ff1fd/f4a20d95aa044123930f484ec4c0bd79 [2019-10-13 20:07:31,056 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:07:31,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:07:31,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:31,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:07:31,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:07:31,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:31" (1/1) ... [2019-10-13 20:07:31,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f0f2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:31, skipping insertion in model container [2019-10-13 20:07:31,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:31" (1/1) ... [2019-10-13 20:07:31,073 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:07:31,136 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:07:31,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:31,931 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:07:32,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:32,122 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:07:32,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:32 WrapperNode [2019-10-13 20:07:32,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:32,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:07:32,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:07:32,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:07:32,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:32" (1/1) ... [2019-10-13 20:07:32,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:32" (1/1) ... [2019-10-13 20:07:32,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:32" (1/1) ... [2019-10-13 20:07:32,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:32" (1/1) ... [2019-10-13 20:07:32,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:32" (1/1) ... [2019-10-13 20:07:32,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:32" (1/1) ... [2019-10-13 20:07:32,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:32" (1/1) ... [2019-10-13 20:07:32,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:07:32,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:07:32,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:07:32,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:07:32,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:32" (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 [2019-10-13 20:07:32,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:07:32,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:07:32,371 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:07:32,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:07:32,372 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:07:32,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:07:32,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:07:32,372 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:07:32,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:07:32,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:07:32,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:07:33,797 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:07:33,797 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:07:33,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:33 BoogieIcfgContainer [2019-10-13 20:07:33,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:07:33,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:07:33,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:07:33,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:07:33,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:07:31" (1/3) ... [2019-10-13 20:07:33,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a026582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:33, skipping insertion in model container [2019-10-13 20:07:33,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:32" (2/3) ... [2019-10-13 20:07:33,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a026582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:33, skipping insertion in model container [2019-10-13 20:07:33,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:33" (3/3) ... [2019-10-13 20:07:33,814 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label45.c [2019-10-13 20:07:33,826 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:07:33,834 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:07:33,844 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:07:33,872 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:07:33,872 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:07:33,872 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:07:33,872 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:07:33,872 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:07:33,873 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:07:33,873 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:07:33,873 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:07:33,897 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:07:33,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 20:07:33,904 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:33,906 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] [2019-10-13 20:07:33,907 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:33,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:33,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1020079963, now seen corresponding path program 1 times [2019-10-13 20:07:33,921 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:33,922 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653645745] [2019-10-13 20:07:33,922 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:33,922 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:33,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:34,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653645745] [2019-10-13 20:07:34,240 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:34,241 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:34,241 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639848747] [2019-10-13 20:07:34,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:34,250 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:34,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:34,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:34,271 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-13 20:07:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:36,079 INFO L93 Difference]: Finished difference Result 890 states and 1606 transitions. [2019-10-13 20:07:36,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:36,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2019-10-13 20:07:36,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:36,104 INFO L225 Difference]: With dead ends: 890 [2019-10-13 20:07:36,105 INFO L226 Difference]: Without dead ends: 554 [2019-10-13 20:07:36,113 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 [2019-10-13 20:07:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-13 20:07:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 372. [2019-10-13 20:07:36,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-13 20:07:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 524 transitions. [2019-10-13 20:07:36,197 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 524 transitions. Word has length 42 [2019-10-13 20:07:36,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:36,198 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 524 transitions. [2019-10-13 20:07:36,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:36,198 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 524 transitions. [2019-10-13 20:07:36,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 20:07:36,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:36,204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:36,205 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:36,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2050989129, now seen corresponding path program 1 times [2019-10-13 20:07:36,205 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:36,206 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100106087] [2019-10-13 20:07:36,206 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:36,206 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:36,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:36,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100106087] [2019-10-13 20:07:36,446 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:36,446 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:36,446 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914192053] [2019-10-13 20:07:36,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:36,455 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:36,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:36,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:36,456 INFO L87 Difference]: Start difference. First operand 372 states and 524 transitions. Second operand 4 states. [2019-10-13 20:07:37,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:37,890 INFO L93 Difference]: Finished difference Result 1466 states and 2091 transitions. [2019-10-13 20:07:37,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:37,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-13 20:07:37,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:37,897 INFO L225 Difference]: With dead ends: 1466 [2019-10-13 20:07:37,897 INFO L226 Difference]: Without dead ends: 736 [2019-10-13 20:07:37,900 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 [2019-10-13 20:07:37,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2019-10-13 20:07:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 554. [2019-10-13 20:07:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-13 20:07:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 809 transitions. [2019-10-13 20:07:37,934 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 809 transitions. Word has length 125 [2019-10-13 20:07:37,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:37,935 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 809 transitions. [2019-10-13 20:07:37,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:37,935 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 809 transitions. [2019-10-13 20:07:37,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 20:07:37,938 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:37,938 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:37,938 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:37,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:37,939 INFO L82 PathProgramCache]: Analyzing trace with hash 488627185, now seen corresponding path program 1 times [2019-10-13 20:07:37,939 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:37,939 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426092589] [2019-10-13 20:07:37,939 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:37,940 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:37,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:38,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426092589] [2019-10-13 20:07:38,037 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:38,037 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:38,037 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783943587] [2019-10-13 20:07:38,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:38,038 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:38,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:38,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:38,039 INFO L87 Difference]: Start difference. First operand 554 states and 809 transitions. Second operand 4 states. [2019-10-13 20:07:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:39,369 INFO L93 Difference]: Finished difference Result 2194 states and 3264 transitions. [2019-10-13 20:07:39,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:39,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-10-13 20:07:39,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:39,390 INFO L225 Difference]: With dead ends: 2194 [2019-10-13 20:07:39,390 INFO L226 Difference]: Without dead ends: 1646 [2019-10-13 20:07:39,393 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 [2019-10-13 20:07:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-10-13 20:07:39,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1646. [2019-10-13 20:07:39,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-10-13 20:07:39,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2286 transitions. [2019-10-13 20:07:39,478 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2286 transitions. Word has length 137 [2019-10-13 20:07:39,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:39,479 INFO L462 AbstractCegarLoop]: Abstraction has 1646 states and 2286 transitions. [2019-10-13 20:07:39,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2286 transitions. [2019-10-13 20:07:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-10-13 20:07:39,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:39,493 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:07:39,493 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:39,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:39,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1957605909, now seen corresponding path program 1 times [2019-10-13 20:07:39,496 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:39,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87623556] [2019-10-13 20:07:39,497 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:39,497 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:39,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:39,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87623556] [2019-10-13 20:07:39,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435553152] [2019-10-13 20:07:39,803 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 [2019-10-13 20:07:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:39,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:07:39,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:40,150 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:40,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1544127355] [2019-10-13 20:07:40,336 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 257 [2019-10-13 20:07:40,408 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:07:40,408 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:07:50,984 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:07:50,986 INFO L272 AbstractInterpreter]: Visited 124 different actions 124 times. Never merged. Never widened. Performed 287 root evaluator evaluations with a maximum evaluation depth of 13. Performed 287 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-13 20:07:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:50,991 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 20:08:00,200 INFO L227 lantSequenceWeakener]: Weakened 237 states. On average, predicates are now at 77.85% of their original sizes. [2019-10-13 20:08:00,201 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 20:08:00,304 INFO L553 sIntCurrentIteration]: We unified 255 AI predicates to 255 [2019-10-13 20:08:00,305 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 20:08:00,306 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 20:08:00,306 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 5, 5] total 20 [2019-10-13 20:08:00,306 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547142228] [2019-10-13 20:08:00,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 20:08:00,308 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:00,308 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 20:08:00,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 20:08:00,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:08:00,309 INFO L87 Difference]: Start difference. First operand 1646 states and 2286 transitions. Second operand 11 states.