/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:46:19,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:46:19,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:46:19,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:46:19,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:46:19,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:46:19,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:46:19,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:46:19,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:46:19,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:46:19,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:46:19,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:46:19,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:46:19,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:46:19,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:46:19,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:46:19,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:46:19,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:46:19,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:46:19,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:46:19,888 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 [2019-11-06 22:46:19,920 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:46:19,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:46:19,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:46:19,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:46:19,924 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:46:19,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:46:19,925 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:46:19,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:46:19,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:46:19,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:46:19,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:46:19,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:46:19,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:46:19,931 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:46:19,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:46:19,931 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:46:19,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:46:19,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:46:19,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:46:19,932 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:46:19,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:46:19,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:46:19,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:46:19,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:46:19,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:46:19,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:46:19,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:46:19,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:46:19,934 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 [2019-11-06 22:46:20,243 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:46:20,263 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:46:20,266 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:46:20,268 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:46:20,268 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:46:20,269 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label26.c [2019-11-06 22:46:20,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9860b55bd/2d4bf059e45d4d20ac74a7cc3d6d2aa0/FLAGddbc7c77c [2019-11-06 22:46:20,948 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:46:20,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label26.c [2019-11-06 22:46:20,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9860b55bd/2d4bf059e45d4d20ac74a7cc3d6d2aa0/FLAGddbc7c77c [2019-11-06 22:46:21,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9860b55bd/2d4bf059e45d4d20ac74a7cc3d6d2aa0 [2019-11-06 22:46:21,181 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:46:21,183 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:46:21,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:46:21,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:46:21,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:46:21,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:21" (1/1) ... [2019-11-06 22:46:21,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ceec6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:21, skipping insertion in model container [2019-11-06 22:46:21,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:21" (1/1) ... [2019-11-06 22:46:21,198 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:46:21,260 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:46:21,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:46:21,979 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:46:22,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:46:22,176 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:46:22,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:22 WrapperNode [2019-11-06 22:46:22,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:46:22,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:46:22,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:46:22,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:46:22,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:22" (1/1) ... [2019-11-06 22:46:22,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:22" (1/1) ... [2019-11-06 22:46:22,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:22" (1/1) ... [2019-11-06 22:46:22,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:22" (1/1) ... [2019-11-06 22:46:22,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:22" (1/1) ... [2019-11-06 22:46:22,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:22" (1/1) ... [2019-11-06 22:46:22,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:22" (1/1) ... [2019-11-06 22:46:22,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:46:22,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:46:22,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:46:22,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:46:22,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:22" (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 [2019-11-06 22:46:22,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:46:22,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:46:22,447 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:46:22,447 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:46:22,447 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:46:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:46:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:46:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:46:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:46:22,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:46:22,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:46:24,291 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:46:24,291 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:46:24,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:24 BoogieIcfgContainer [2019-11-06 22:46:24,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:46:24,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:46:24,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:46:24,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:46:24,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:21" (1/3) ... [2019-11-06 22:46:24,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27a2e453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:24, skipping insertion in model container [2019-11-06 22:46:24,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:22" (2/3) ... [2019-11-06 22:46:24,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27a2e453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:24, skipping insertion in model container [2019-11-06 22:46:24,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:24" (3/3) ... [2019-11-06 22:46:24,311 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label26.c [2019-11-06 22:46:24,324 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:46:24,337 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:46:24,349 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:46:24,391 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:46:24,391 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:46:24,393 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:46:24,393 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:46:24,393 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:46:24,393 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:46:24,394 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:46:24,394 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:46:24,432 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:46:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 22:46:24,440 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:24,441 INFO L410 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] [2019-11-06 22:46:24,443 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:24,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:24,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2020342670, now seen corresponding path program 1 times [2019-11-06 22:46:24,460 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:24,460 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091816117] [2019-11-06 22:46:24,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:24,920 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091816117] [2019-11-06 22:46:24,920 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:24,921 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:46:24,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968644838] [2019-11-06 22:46:24,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:46:24,929 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:24,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:46:24,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:46:24,947 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-11-06 22:46:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:26,319 INFO L93 Difference]: Finished difference Result 779 states and 1369 transitions. [2019-11-06 22:46:26,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:46:26,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2019-11-06 22:46:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:26,339 INFO L225 Difference]: With dead ends: 779 [2019-11-06 22:46:26,340 INFO L226 Difference]: Without dead ends: 425 [2019-11-06 22:46:26,348 INFO L630 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 [2019-11-06 22:46:26,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-11-06 22:46:26,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-11-06 22:46:26,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-11-06 22:46:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 672 transitions. [2019-11-06 22:46:26,455 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 672 transitions. Word has length 45 [2019-11-06 22:46:26,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:26,455 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 672 transitions. [2019-11-06 22:46:26,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:46:26,456 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 672 transitions. [2019-11-06 22:46:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-06 22:46:26,461 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:26,462 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:46:26,462 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:26,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:26,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1793518198, now seen corresponding path program 1 times [2019-11-06 22:46:26,463 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:26,463 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762277302] [2019-11-06 22:46:26,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:26,683 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762277302] [2019-11-06 22:46:26,684 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:26,684 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:46:26,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315956864] [2019-11-06 22:46:26,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:46:26,687 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:26,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:46:26,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:46:26,687 INFO L87 Difference]: Start difference. First operand 420 states and 672 transitions. Second operand 3 states. [2019-11-06 22:46:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:27,754 INFO L93 Difference]: Finished difference Result 1217 states and 1972 transitions. [2019-11-06 22:46:27,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:46:27,754 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 119 [2019-11-06 22:46:27,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:27,761 INFO L225 Difference]: With dead ends: 1217 [2019-11-06 22:46:27,762 INFO L226 Difference]: Without dead ends: 803 [2019-11-06 22:46:27,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:46:27,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2019-11-06 22:46:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 803. [2019-11-06 22:46:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2019-11-06 22:46:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1166 transitions. [2019-11-06 22:46:27,816 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1166 transitions. Word has length 119 [2019-11-06 22:46:27,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:27,817 INFO L462 AbstractCegarLoop]: Abstraction has 803 states and 1166 transitions. [2019-11-06 22:46:27,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:46:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1166 transitions. [2019-11-06 22:46:27,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 22:46:27,821 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:27,821 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:46:27,822 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:27,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:27,822 INFO L82 PathProgramCache]: Analyzing trace with hash 406650521, now seen corresponding path program 1 times [2019-11-06 22:46:27,822 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:27,823 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932714313] [2019-11-06 22:46:27,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:28,047 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932714313] [2019-11-06 22:46:28,048 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:28,048 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:46:28,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473841608] [2019-11-06 22:46:28,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:46:28,052 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:28,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:46:28,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:46:28,053 INFO L87 Difference]: Start difference. First operand 803 states and 1166 transitions. Second operand 6 states. [2019-11-06 22:46:30,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:30,512 INFO L93 Difference]: Finished difference Result 2977 states and 4579 transitions. [2019-11-06 22:46:30,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:46:30,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2019-11-06 22:46:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:30,535 INFO L225 Difference]: With dead ends: 2977 [2019-11-06 22:46:30,536 INFO L226 Difference]: Without dead ends: 2180 [2019-11-06 22:46:30,543 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:46:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2019-11-06 22:46:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1978. [2019-11-06 22:46:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1978 states. [2019-11-06 22:46:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2771 transitions. [2019-11-06 22:46:30,650 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2771 transitions. Word has length 130 [2019-11-06 22:46:30,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:30,659 INFO L462 AbstractCegarLoop]: Abstraction has 1978 states and 2771 transitions. [2019-11-06 22:46:30,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:46:30,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2771 transitions. [2019-11-06 22:46:30,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-11-06 22:46:30,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:30,674 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:46:30,674 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:30,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:30,675 INFO L82 PathProgramCache]: Analyzing trace with hash 622607653, now seen corresponding path program 1 times [2019-11-06 22:46:30,675 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:30,675 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286260217] [2019-11-06 22:46:30,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:30,941 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286260217] [2019-11-06 22:46:30,941 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265565650] [2019-11-06 22:46:30,942 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 [2019-11-06 22:46:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:31,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:46:31,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:46:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:31,159 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:46:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:31,347 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1966490806] [2019-11-06 22:46:31,353 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 209 [2019-11-06 22:46:31,401 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:46:31,401 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)