/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/Problem10_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:43:37,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:43:37,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:43:37,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:43:37,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:43:37,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:43:37,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:43:37,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:43:37,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:43:37,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:43:37,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:43:37,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:43:37,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:43:37,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:43:37,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:43:37,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:43:37,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:43:37,684 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 22:43:37,711 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:43:37,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:43:37,712 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:43:37,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:43:37,713 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:43:37,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:43:37,713 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:43:37,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:43:37,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:43:37,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:43:37,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:43:37,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:43:37,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:43:37,714 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:43:37,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:43:37,715 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:43:37,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:43:37,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:43:37,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:43:37,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:43:37,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:43:37,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:43:37,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:43:37,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:43:37,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:43:37,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:43:37,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:43:37,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:43:37,718 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 22:43:37,995 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:43:38,009 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:43:38,013 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:43:38,014 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:43:38,015 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:43:38,015 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label36.c [2019-11-06 22:43:38,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b765bb3e/10f5594517c3406587fcc577da0940ee/FLAG4bdc50e94 [2019-11-06 22:43:38,602 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:43:38,603 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label36.c [2019-11-06 22:43:38,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b765bb3e/10f5594517c3406587fcc577da0940ee/FLAG4bdc50e94 [2019-11-06 22:43:38,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b765bb3e/10f5594517c3406587fcc577da0940ee [2019-11-06 22:43:38,927 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:43:38,929 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:43:38,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:43:38,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:43:38,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:43:38,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:38" (1/1) ... [2019-11-06 22:43:38,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2910f1cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:38, skipping insertion in model container [2019-11-06 22:43:38,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:38" (1/1) ... [2019-11-06 22:43:38,946 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:43:39,022 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:43:39,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:43:39,637 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:43:39,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:43:39,832 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:43:39,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:39 WrapperNode [2019-11-06 22:43:39,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:43:39,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:43:39,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:43:39,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:43:39,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:39" (1/1) ... [2019-11-06 22:43:39,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:39" (1/1) ... [2019-11-06 22:43:39,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:39" (1/1) ... [2019-11-06 22:43:39,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:39" (1/1) ... [2019-11-06 22:43:39,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:39" (1/1) ... [2019-11-06 22:43:39,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:39" (1/1) ... [2019-11-06 22:43:39,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:39" (1/1) ... [2019-11-06 22:43:40,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:43:40,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:43:40,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:43:40,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:43:40,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:43:40,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:43:40,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:43:40,072 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:43:40,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:43:40,073 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:43:40,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:43:40,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:43:40,073 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:43:40,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:43:40,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:43:40,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:43:41,398 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:43:41,400 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:43:41,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:41 BoogieIcfgContainer [2019-11-06 22:43:41,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:43:41,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:43:41,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:43:41,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:43:41,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:43:38" (1/3) ... [2019-11-06 22:43:41,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5487ca95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:41, skipping insertion in model container [2019-11-06 22:43:41,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:39" (2/3) ... [2019-11-06 22:43:41,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5487ca95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:41, skipping insertion in model container [2019-11-06 22:43:41,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:41" (3/3) ... [2019-11-06 22:43:41,419 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label36.c [2019-11-06 22:43:41,429 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:43:41,438 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:43:41,449 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:43:41,483 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:43:41,483 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:43:41,483 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:43:41,483 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:43:41,483 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:43:41,484 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:43:41,484 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:43:41,484 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:43:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 22:43:41,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 22:43:41,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:41,526 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 22:43:41,528 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:41,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1093393358, now seen corresponding path program 1 times [2019-11-06 22:43:41,541 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:41,542 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414428295] [2019-11-06 22:43:41,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:41,840 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 22:43:41,841 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414428295] [2019-11-06 22:43:41,842 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:43:41,842 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:43:41,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613690221] [2019-11-06 22:43:41,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:43:41,851 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:43:41,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:43:41,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:43:41,869 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-11-06 22:43:42,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:43:42,906 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-11-06 22:43:42,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:43:42,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2019-11-06 22:43:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:43:42,925 INFO L225 Difference]: With dead ends: 571 [2019-11-06 22:43:42,925 INFO L226 Difference]: Without dead ends: 294 [2019-11-06 22:43:42,934 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 22:43:42,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-11-06 22:43:43,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-11-06 22:43:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-11-06 22:43:43,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-11-06 22:43:43,041 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 45 [2019-11-06 22:43:43,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:43:43,042 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-11-06 22:43:43,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:43:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-11-06 22:43:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-06 22:43:43,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:43,056 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] [2019-11-06 22:43:43,056 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:43,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1968204002, now seen corresponding path program 1 times [2019-11-06 22:43:43,057 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:43,058 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086540776] [2019-11-06 22:43:43,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:43,328 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 22:43:43,329 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086540776] [2019-11-06 22:43:43,329 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:43:43,329 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:43:43,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786952777] [2019-11-06 22:43:43,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:43:43,332 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:43:43,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:43:43,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:43:43,332 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 5 states. [2019-11-06 22:43:44,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:43:44,372 INFO L93 Difference]: Finished difference Result 890 states and 1368 transitions. [2019-11-06 22:43:44,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:43:44,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2019-11-06 22:43:44,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:43:44,379 INFO L225 Difference]: With dead ends: 890 [2019-11-06 22:43:44,379 INFO L226 Difference]: Without dead ends: 602 [2019-11-06 22:43:44,381 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:43:44,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2019-11-06 22:43:44,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 592. [2019-11-06 22:43:44,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-11-06 22:43:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 867 transitions. [2019-11-06 22:43:44,423 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 867 transitions. Word has length 127 [2019-11-06 22:43:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:43:44,424 INFO L462 AbstractCegarLoop]: Abstraction has 592 states and 867 transitions. [2019-11-06 22:43:44,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:43:44,424 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 867 transitions. [2019-11-06 22:43:44,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-06 22:43:44,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:44,426 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:43:44,426 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:44,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:44,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1459382270, now seen corresponding path program 1 times [2019-11-06 22:43:44,427 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:44,427 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296517604] [2019-11-06 22:43:44,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:44,703 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 22:43:44,703 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296517604] [2019-11-06 22:43:44,704 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:43:44,704 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:43:44,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238976081] [2019-11-06 22:43:44,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:43:44,705 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:43:44,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:43:44,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:43:44,706 INFO L87 Difference]: Start difference. First operand 592 states and 867 transitions. Second operand 6 states. [2019-11-06 22:43:45,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:43:45,670 INFO L93 Difference]: Finished difference Result 1490 states and 2245 transitions. [2019-11-06 22:43:45,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:43:45,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-11-06 22:43:45,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:43:45,679 INFO L225 Difference]: With dead ends: 1490 [2019-11-06 22:43:45,680 INFO L226 Difference]: Without dead ends: 904 [2019-11-06 22:43:45,682 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:43:45,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2019-11-06 22:43:45,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 890. [2019-11-06 22:43:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-11-06 22:43:45,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1300 transitions. [2019-11-06 22:43:45,726 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1300 transitions. Word has length 143 [2019-11-06 22:43:45,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:43:45,727 INFO L462 AbstractCegarLoop]: Abstraction has 890 states and 1300 transitions. [2019-11-06 22:43:45,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:43:45,727 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1300 transitions. [2019-11-06 22:43:45,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-06 22:43:45,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:45,730 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:45,731 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:45,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:45,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1396859214, now seen corresponding path program 1 times [2019-11-06 22:43:45,731 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:45,732 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024765970] [2019-11-06 22:43:45,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:45,974 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 22:43:45,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024765970] [2019-11-06 22:43:45,974 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:43:45,975 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:43:45,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30049072] [2019-11-06 22:43:45,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:43:45,976 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:43:45,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:43:45,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:43:45,976 INFO L87 Difference]: Start difference. First operand 890 states and 1300 transitions. Second operand 6 states. [2019-11-06 22:43:46,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:43:46,821 INFO L93 Difference]: Finished difference Result 2104 states and 3183 transitions. [2019-11-06 22:43:46,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:43:46,822 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 167 [2019-11-06 22:43:46,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:43:46,830 INFO L225 Difference]: With dead ends: 2104 [2019-11-06 22:43:46,830 INFO L226 Difference]: Without dead ends: 1220 [2019-11-06 22:43:46,834 INFO L630 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 [2019-11-06 22:43:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2019-11-06 22:43:46,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1192. [2019-11-06 22:43:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-11-06 22:43:46,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1616 transitions. [2019-11-06 22:43:46,912 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1616 transitions. Word has length 167 [2019-11-06 22:43:46,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:43:46,913 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1616 transitions. [2019-11-06 22:43:46,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:43:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1616 transitions. [2019-11-06 22:43:46,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-11-06 22:43:46,917 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:46,918 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:43:46,918 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:46,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:46,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1882645595, now seen corresponding path program 1 times [2019-11-06 22:43:46,919 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:46,920 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903184077] [2019-11-06 22:43:46,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:43:47,422 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903184077] [2019-11-06 22:43:47,422 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253585898] [2019-11-06 22:43:47,422 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 22:43:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:47,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:43:47,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:43:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:43:47,692 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:43:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:43:47,827 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1141983960] [2019-11-06 22:43:47,835 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 207 [2019-11-06 22:43:47,903 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:43:47,903 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:44:00,992 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-11-06 22:44:16,716 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:44:16,719 INFO L272 AbstractInterpreter]: Visited 90 different actions 173 times. Merged at 3 different actions 3 times. Never widened. Performed 307 root evaluator evaluations with a maximum evaluation depth of 16. Performed 307 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-11-06 22:44:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:16,723 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates