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/Problem03_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:58:16,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:58:16,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:58:16,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:58:16,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:58:16,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:58:16,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:58:16,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:58:16,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:58:16,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:58:16,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:58:16,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:58:16,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:58:16,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:58:16,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:58:16,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:58:16,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:58:16,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:58:16,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:58:16,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:58:16,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:58:16,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:58:16,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:58:16,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:58:16,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:58:16,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:58:16,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:58:16,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:58:16,914 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:58:16,942 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:58:16,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:58:16,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:58:16,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:58:16,944 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:58:16,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:58:16,944 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:58:16,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:58:16,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:58:16,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:58:16,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:58:16,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:58:16,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:58:16,946 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:58:16,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:58:16,946 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:58:16,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:58:16,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:58:16,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:58:16,947 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:58:16,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:58:16,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:58:16,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:58:16,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:58:16,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:58:16,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:58:16,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:58:16,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:58:16,948 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-14 23:58:17,232 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:58:17,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:58:17,249 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:58:17,250 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:58:17,251 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:58:17,251 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label08.c [2019-10-14 23:58:17,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5250177/22b2a4a2eb83408590d1661e41aaacdc/FLAG712f2ef78 [2019-10-14 23:58:18,043 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:58:18,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label08.c [2019-10-14 23:58:18,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5250177/22b2a4a2eb83408590d1661e41aaacdc/FLAG712f2ef78 [2019-10-14 23:58:18,237 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5250177/22b2a4a2eb83408590d1661e41aaacdc [2019-10-14 23:58:18,245 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:58:18,247 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:58:18,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:18,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:58:18,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:58:18,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:18" (1/1) ... [2019-10-14 23:58:18,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a346ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:18, skipping insertion in model container [2019-10-14 23:58:18,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:18" (1/1) ... [2019-10-14 23:58:18,263 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:58:18,345 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:58:19,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:19,289 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:58:19,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:19,670 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:58:19,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:19 WrapperNode [2019-10-14 23:58:19,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:19,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:58:19,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:58:19,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:58:19,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:19" (1/1) ... [2019-10-14 23:58:19,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:19" (1/1) ... [2019-10-14 23:58:19,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:19" (1/1) ... [2019-10-14 23:58:19,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:19" (1/1) ... [2019-10-14 23:58:19,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:19" (1/1) ... [2019-10-14 23:58:19,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:19" (1/1) ... [2019-10-14 23:58:19,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:19" (1/1) ... [2019-10-14 23:58:19,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:58:19,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:58:19,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:58:19,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:58:19,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:58:19,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:58:19,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:58:19,916 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:58:19,916 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:58:19,917 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:58:19,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:58:19,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:58:19,917 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:58:19,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:58:19,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:58:19,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:58:21,995 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:58:21,995 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:58:22,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:21 BoogieIcfgContainer [2019-10-14 23:58:22,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:58:22,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:58:22,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:58:22,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:58:22,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:58:18" (1/3) ... [2019-10-14 23:58:22,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b850b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:22, skipping insertion in model container [2019-10-14 23:58:22,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:19" (2/3) ... [2019-10-14 23:58:22,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b850b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:22, skipping insertion in model container [2019-10-14 23:58:22,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:21" (3/3) ... [2019-10-14 23:58:22,019 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label08.c [2019-10-14 23:58:22,032 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:58:22,043 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:58:22,055 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:58:22,095 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:58:22,095 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:58:22,097 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:58:22,097 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:58:22,097 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:58:22,097 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:58:22,098 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:58:22,098 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:58:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 23:58:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-14 23:58:22,154 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:22,155 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:22,157 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:22,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:22,164 INFO L82 PathProgramCache]: Analyzing trace with hash -116190352, now seen corresponding path program 1 times [2019-10-14 23:58:22,173 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:22,174 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290547124] [2019-10-14 23:58:22,174 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:22,174 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:22,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:23,099 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290547124] [2019-10-14 23:58:23,100 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:23,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:23,101 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700474483] [2019-10-14 23:58:23,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:23,109 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:23,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:23,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:23,127 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-10-14 23:58:24,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:24,496 INFO L93 Difference]: Finished difference Result 835 states and 1476 transitions. [2019-10-14 23:58:24,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:24,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2019-10-14 23:58:24,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:24,518 INFO L225 Difference]: With dead ends: 835 [2019-10-14 23:58:24,518 INFO L226 Difference]: Without dead ends: 462 [2019-10-14 23:58:24,526 INFO L600 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 [2019-10-14 23:58:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2019-10-14 23:58:24,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2019-10-14 23:58:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2019-10-14 23:58:24,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 739 transitions. [2019-10-14 23:58:24,609 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 739 transitions. Word has length 163 [2019-10-14 23:58:24,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:24,610 INFO L462 AbstractCegarLoop]: Abstraction has 460 states and 739 transitions. [2019-10-14 23:58:24,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:24,610 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 739 transitions. [2019-10-14 23:58:24,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-14 23:58:24,616 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:24,617 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:24,617 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:24,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:24,618 INFO L82 PathProgramCache]: Analyzing trace with hash 616853235, now seen corresponding path program 1 times [2019-10-14 23:58:24,618 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:24,618 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172740796] [2019-10-14 23:58:24,618 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:24,619 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:24,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:24,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172740796] [2019-10-14 23:58:24,770 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:24,770 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:58:24,771 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771150501] [2019-10-14 23:58:24,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:58:24,773 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:24,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:58:24,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:58:24,774 INFO L87 Difference]: Start difference. First operand 460 states and 739 transitions. Second operand 6 states. [2019-10-14 23:58:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:26,615 INFO L93 Difference]: Finished difference Result 1391 states and 2302 transitions. [2019-10-14 23:58:26,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:58:26,616 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 172 [2019-10-14 23:58:26,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:26,625 INFO L225 Difference]: With dead ends: 1391 [2019-10-14 23:58:26,626 INFO L226 Difference]: Without dead ends: 937 [2019-10-14 23:58:26,630 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:58:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2019-10-14 23:58:26,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 899. [2019-10-14 23:58:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2019-10-14 23:58:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1431 transitions. [2019-10-14 23:58:26,703 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1431 transitions. Word has length 172 [2019-10-14 23:58:26,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:26,707 INFO L462 AbstractCegarLoop]: Abstraction has 899 states and 1431 transitions. [2019-10-14 23:58:26,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:58:26,707 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1431 transitions. [2019-10-14 23:58:26,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-14 23:58:26,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:26,714 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:26,714 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:26,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:26,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1596545668, now seen corresponding path program 1 times [2019-10-14 23:58:26,715 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:26,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493550353] [2019-10-14 23:58:26,715 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:26,715 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:26,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:27,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493550353] [2019-10-14 23:58:27,004 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:27,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:27,005 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351787252] [2019-10-14 23:58:27,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:27,007 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:27,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:27,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:27,008 INFO L87 Difference]: Start difference. First operand 899 states and 1431 transitions. Second operand 3 states. [2019-10-14 23:58:28,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:28,253 INFO L93 Difference]: Finished difference Result 2651 states and 4310 transitions. [2019-10-14 23:58:28,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:28,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2019-10-14 23:58:28,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:28,265 INFO L225 Difference]: With dead ends: 2651 [2019-10-14 23:58:28,266 INFO L226 Difference]: Without dead ends: 1758 [2019-10-14 23:58:28,269 INFO L600 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 [2019-10-14 23:58:28,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2019-10-14 23:58:28,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1738. [2019-10-14 23:58:28,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1738 states. [2019-10-14 23:58:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2738 transitions. [2019-10-14 23:58:28,326 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2738 transitions. Word has length 175 [2019-10-14 23:58:28,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:28,326 INFO L462 AbstractCegarLoop]: Abstraction has 1738 states and 2738 transitions. [2019-10-14 23:58:28,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2738 transitions. [2019-10-14 23:58:28,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-14 23:58:28,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:28,334 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:28,335 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:28,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:28,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1401075951, now seen corresponding path program 1 times [2019-10-14 23:58:28,335 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:28,336 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340803755] [2019-10-14 23:58:28,336 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:28,336 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:28,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:28,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340803755] [2019-10-14 23:58:28,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035861961] [2019-10-14 23:58:28,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:28,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:58:28,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:58:28,886 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:58:28,998 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:58:28,999 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-14 23:58:28,999 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734892592] [2019-10-14 23:58:29,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:29,002 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:29,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:29,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:58:29,003 INFO L87 Difference]: Start difference. First operand 1738 states and 2738 transitions. Second operand 3 states. [2019-10-14 23:58:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:30,231 INFO L93 Difference]: Finished difference Result 5158 states and 8338 transitions. [2019-10-14 23:58:30,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:30,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 192 [2019-10-14 23:58:30,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:30,256 INFO L225 Difference]: With dead ends: 5158 [2019-10-14 23:58:30,257 INFO L226 Difference]: Without dead ends: 3426 [2019-10-14 23:58:30,263 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 382 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:58:30,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2019-10-14 23:58:30,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 3406. [2019-10-14 23:58:30,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3406 states. [2019-10-14 23:58:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 5404 transitions. [2019-10-14 23:58:30,476 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 5404 transitions. Word has length 192 [2019-10-14 23:58:30,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:30,476 INFO L462 AbstractCegarLoop]: Abstraction has 3406 states and 5404 transitions. [2019-10-14 23:58:30,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:30,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 5404 transitions. [2019-10-14 23:58:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-14 23:58:30,489 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:30,489 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:30,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:30,704 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:30,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:30,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1627084493, now seen corresponding path program 1 times [2019-10-14 23:58:30,705 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:30,705 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628663616] [2019-10-14 23:58:30,706 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:30,707 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:30,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:30,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628663616] [2019-10-14 23:58:30,903 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882971253] [2019-10-14 23:58:30,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:31,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:58:31,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 23:58:31,222 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:58:31,361 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:58:31,361 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-14 23:58:31,361 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906046774] [2019-10-14 23:58:31,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:58:31,362 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:31,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:58:31,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:58:31,363 INFO L87 Difference]: Start difference. First operand 3406 states and 5404 transitions. Second operand 5 states. [2019-10-14 23:58:33,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:33,043 INFO L93 Difference]: Finished difference Result 6948 states and 11219 transitions. [2019-10-14 23:58:33,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:58:33,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 213 [2019-10-14 23:58:33,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:33,072 INFO L225 Difference]: With dead ends: 6948 [2019-10-14 23:58:33,072 INFO L226 Difference]: Without dead ends: 3548 [2019-10-14 23:58:33,083 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:58:33,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2019-10-14 23:58:33,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3506. [2019-10-14 23:58:33,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3506 states. [2019-10-14 23:58:33,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 5442 transitions. [2019-10-14 23:58:33,232 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 5442 transitions. Word has length 213 [2019-10-14 23:58:33,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:33,233 INFO L462 AbstractCegarLoop]: Abstraction has 3506 states and 5442 transitions. [2019-10-14 23:58:33,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:58:33,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 5442 transitions. [2019-10-14 23:58:33,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-14 23:58:33,246 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:33,247 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:33,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:33,453 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:33,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1454436266, now seen corresponding path program 1 times [2019-10-14 23:58:33,453 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:33,454 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381768330] [2019-10-14 23:58:33,454 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:33,454 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:33,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:58:33,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381768330] [2019-10-14 23:58:33,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403383808] [2019-10-14 23:58:33,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:33,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:58:33,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 23:58:34,038 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:58:34,145 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:58:34,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-14 23:58:34,155 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094563018] [2019-10-14 23:58:34,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:58:34,156 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:34,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:58:34,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:58:34,157 INFO L87 Difference]: Start difference. First operand 3506 states and 5442 transitions. Second operand 5 states. [2019-10-14 23:58:35,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:35,680 INFO L93 Difference]: Finished difference Result 10607 states and 18034 transitions. [2019-10-14 23:58:35,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:58:35,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2019-10-14 23:58:35,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:35,733 INFO L225 Difference]: With dead ends: 10607 [2019-10-14 23:58:35,734 INFO L226 Difference]: Without dead ends: 7107 [2019-10-14 23:58:35,750 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 423 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:58:35,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7107 states. [2019-10-14 23:58:35,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7107 to 7009. [2019-10-14 23:58:35,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7009 states. [2019-10-14 23:58:36,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7009 states to 7009 states and 10777 transitions. [2019-10-14 23:58:36,017 INFO L78 Accepts]: Start accepts. Automaton has 7009 states and 10777 transitions. Word has length 214 [2019-10-14 23:58:36,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:36,018 INFO L462 AbstractCegarLoop]: Abstraction has 7009 states and 10777 transitions. [2019-10-14 23:58:36,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:58:36,018 INFO L276 IsEmpty]: Start isEmpty. Operand 7009 states and 10777 transitions. [2019-10-14 23:58:36,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-10-14 23:58:36,041 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:36,041 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:36,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:36,247 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:36,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:36,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1234696937, now seen corresponding path program 1 times [2019-10-14 23:58:36,248 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:36,248 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737998776] [2019-10-14 23:58:36,249 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:36,249 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:36,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:36,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737998776] [2019-10-14 23:58:36,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107234888] [2019-10-14 23:58:36,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:36,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:58:36,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:58:36,662 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:58:36,869 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1210319195] [2019-10-14 23:58:36,880 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 216 [2019-10-14 23:58:36,956 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:58:36,956 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)