/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/Problem02_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:33:47,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:33:47,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:33:47,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:33:47,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:33:47,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:33:47,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:33:47,755 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 22:33:47,789 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:33:47,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:33:47,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:33:47,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:33:47,791 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:33:47,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:33:47,791 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:33:47,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:33:47,791 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:33:47,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:33:47,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:33:47,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:33:47,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:33:47,795 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:33:47,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:33:47,796 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:33:47,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:33:47,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:33:47,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:33:47,797 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:33:47,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:33:47,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:33:47,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:33:47,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:33:47,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:33:47,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:33:47,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:33:47,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:33:47,802 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 22:33:48,097 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:33:48,110 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:33:48,113 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:33:48,114 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:33:48,115 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:33:48,116 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label17.c [2019-11-06 22:33:48,174 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a6b11cd/51a228915ed840289e2d66362ddd6616/FLAGbfd63cadb [2019-11-06 22:33:48,708 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:33:48,709 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label17.c [2019-11-06 22:33:48,724 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a6b11cd/51a228915ed840289e2d66362ddd6616/FLAGbfd63cadb [2019-11-06 22:33:48,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a6b11cd/51a228915ed840289e2d66362ddd6616 [2019-11-06 22:33:48,963 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:33:48,965 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:33:48,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:33:48,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:33:48,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:33:48,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:33:48" (1/1) ... [2019-11-06 22:33:48,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@788c53ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:48, skipping insertion in model container [2019-11-06 22:33:48,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:33:48" (1/1) ... [2019-11-06 22:33:48,981 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:33:49,035 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:33:49,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:33:49,566 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:33:49,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:33:49,709 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:33:49,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:49 WrapperNode [2019-11-06 22:33:49,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:33:49,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:33:49,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:33:49,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:33:49,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:49" (1/1) ... [2019-11-06 22:33:49,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:49" (1/1) ... [2019-11-06 22:33:49,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:49" (1/1) ... [2019-11-06 22:33:49,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:49" (1/1) ... [2019-11-06 22:33:49,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:49" (1/1) ... [2019-11-06 22:33:49,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:49" (1/1) ... [2019-11-06 22:33:49,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:49" (1/1) ... [2019-11-06 22:33:49,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:33:49,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:33:49,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:33:49,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:33:49,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:49" (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 22:33:49,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:33:49,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:33:49,877 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:33:49,877 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:33:49,877 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:33:49,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:33:49,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:33:49,878 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:33:49,878 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:33:49,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:33:49,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:33:51,067 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:33:51,067 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:33:51,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:33:51 BoogieIcfgContainer [2019-11-06 22:33:51,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:33:51,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:33:51,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:33:51,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:33:51,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:33:48" (1/3) ... [2019-11-06 22:33:51,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b2e5e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:33:51, skipping insertion in model container [2019-11-06 22:33:51,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:49" (2/3) ... [2019-11-06 22:33:51,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b2e5e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:33:51, skipping insertion in model container [2019-11-06 22:33:51,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:33:51" (3/3) ... [2019-11-06 22:33:51,077 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label17.c [2019-11-06 22:33:51,087 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:33:51,096 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:33:51,108 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:33:51,140 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:33:51,140 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:33:51,141 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:33:51,141 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:33:51,142 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:33:51,142 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:33:51,142 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:33:51,142 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:33:51,169 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:33:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-06 22:33:51,184 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:51,185 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:33:51,188 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:51,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:51,195 INFO L82 PathProgramCache]: Analyzing trace with hash -130625471, now seen corresponding path program 1 times [2019-11-06 22:33:51,207 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:51,208 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428155069] [2019-11-06 22:33:51,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:51,704 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 22:33:51,705 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428155069] [2019-11-06 22:33:51,706 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:51,706 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:33:51,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190768200] [2019-11-06 22:33:51,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:33:51,719 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:51,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:33:51,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:33:51,737 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-11-06 22:33:52,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:52,723 INFO L93 Difference]: Finished difference Result 615 states and 1053 transitions. [2019-11-06 22:33:52,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:33:52,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-11-06 22:33:52,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:52,757 INFO L225 Difference]: With dead ends: 615 [2019-11-06 22:33:52,758 INFO L226 Difference]: Without dead ends: 317 [2019-11-06 22:33:52,771 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 22:33:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2019-11-06 22:33:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2019-11-06 22:33:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-11-06 22:33:52,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 478 transitions. [2019-11-06 22:33:52,873 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 478 transitions. Word has length 125 [2019-11-06 22:33:52,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:52,874 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 478 transitions. [2019-11-06 22:33:52,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:33:52,875 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 478 transitions. [2019-11-06 22:33:52,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-06 22:33:52,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:52,879 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:33:52,880 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:52,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:52,880 INFO L82 PathProgramCache]: Analyzing trace with hash -439764036, now seen corresponding path program 1 times [2019-11-06 22:33:52,881 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:52,881 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077100904] [2019-11-06 22:33:52,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:53,056 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077100904] [2019-11-06 22:33:53,056 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:53,057 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:33:53,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414297436] [2019-11-06 22:33:53,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:33:53,060 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:53,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:33:53,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:33:53,061 INFO L87 Difference]: Start difference. First operand 317 states and 478 transitions. Second operand 6 states. [2019-11-06 22:33:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:54,006 INFO L93 Difference]: Finished difference Result 962 states and 1500 transitions. [2019-11-06 22:33:54,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:33:54,007 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2019-11-06 22:33:54,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:54,013 INFO L225 Difference]: With dead ends: 962 [2019-11-06 22:33:54,013 INFO L226 Difference]: Without dead ends: 651 [2019-11-06 22:33:54,016 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 22:33:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-11-06 22:33:54,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 625. [2019-11-06 22:33:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2019-11-06 22:33:54,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 924 transitions. [2019-11-06 22:33:54,062 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 924 transitions. Word has length 140 [2019-11-06 22:33:54,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:54,063 INFO L462 AbstractCegarLoop]: Abstraction has 625 states and 924 transitions. [2019-11-06 22:33:54,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:33:54,063 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 924 transitions. [2019-11-06 22:33:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 22:33:54,067 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:54,067 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:33:54,068 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:54,068 INFO L82 PathProgramCache]: Analyzing trace with hash 946157655, now seen corresponding path program 1 times [2019-11-06 22:33:54,068 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:54,069 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066245194] [2019-11-06 22:33:54,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 22:33:54,265 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066245194] [2019-11-06 22:33:54,266 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808204613] [2019-11-06 22:33:54,266 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 22:33:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:54,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:33:54,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:33:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:54,468 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:33:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:54,584 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1529374396] [2019-11-06 22:33:54,591 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 149 [2019-11-06 22:33:54,653 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:33:54,653 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)