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_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:58:56,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:58:56,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:58:56,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:58:56,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:58:56,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:58:57,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:58:57,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:58:57,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:58:57,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:58:57,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:58:57,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:58:57,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:58:57,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:58:57,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:58:57,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:58:57,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:58:57,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:58:57,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:58:57,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:58:57,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:58:57,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:58:57,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:58:57,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:58:57,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:58:57,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:58:57,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:58:57,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:58:57,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:58:57,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:58:57,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:58:57,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:58:57,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:58:57,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:58:57,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:58:57,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:58:57,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:58:57,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:58:57,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:58:57,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:58:57,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:58:57,062 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 23:58:57,084 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:58:57,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:58:57,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:58:57,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:58:57,087 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:58:57,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:58:57,087 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:58:57,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:58:57,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:58:57,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:58:57,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:58:57,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:58:57,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:58:57,090 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:58:57,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:58:57,090 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:58:57,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:58:57,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:58:57,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:58:57,091 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:58:57,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:58:57,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:58:57,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:58:57,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:58:57,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:58:57,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:58:57,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:58:57,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:58:57,092 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 23:58:57,382 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:58:57,396 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:58:57,400 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:58:57,401 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:58:57,402 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:58:57,402 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label39.c [2019-10-14 23:58:57,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e169de35/db8b270be7e34b51a56a4baac20691bb/FLAG27856dd96 [2019-10-14 23:58:58,135 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:58:58,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label39.c [2019-10-14 23:58:58,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e169de35/db8b270be7e34b51a56a4baac20691bb/FLAG27856dd96 [2019-10-14 23:58:58,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e169de35/db8b270be7e34b51a56a4baac20691bb [2019-10-14 23:58:58,327 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:58:58,329 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:58:58,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:58,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:58:58,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:58:58,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:58" (1/1) ... [2019-10-14 23:58:58,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc80f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:58, skipping insertion in model container [2019-10-14 23:58:58,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:58" (1/1) ... [2019-10-14 23:58:58,348 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:58:58,437 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:58:59,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:59,385 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:58:59,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:59,782 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:58:59,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:59 WrapperNode [2019-10-14 23:58:59,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:59,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:58:59,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:58:59,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:58:59,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:59" (1/1) ... [2019-10-14 23:58:59,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:59" (1/1) ... [2019-10-14 23:58:59,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:59" (1/1) ... [2019-10-14 23:58:59,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:59" (1/1) ... [2019-10-14 23:58:59,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:59" (1/1) ... [2019-10-14 23:58:59,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:59" (1/1) ... [2019-10-14 23:58:59,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:59" (1/1) ... [2019-10-14 23:58:59,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:58:59,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:58:59,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:58:59,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:58:59,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:59" (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 23:59:00,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:59:00,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:59:00,041 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:59:00,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:59:00,042 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:59:00,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:59:00,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:59:00,043 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:59:00,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:59:00,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:59:00,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:59:01,875 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:59:01,876 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:59:01,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:59:01 BoogieIcfgContainer [2019-10-14 23:59:01,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:59:01,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:59:01,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:59:01,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:59:01,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:58:58" (1/3) ... [2019-10-14 23:59:01,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6723279a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:59:01, skipping insertion in model container [2019-10-14 23:59:01,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:59" (2/3) ... [2019-10-14 23:59:01,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6723279a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:59:01, skipping insertion in model container [2019-10-14 23:59:01,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:59:01" (3/3) ... [2019-10-14 23:59:01,893 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label39.c [2019-10-14 23:59:01,908 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:59:01,922 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:59:01,935 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:59:01,977 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:59:01,977 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:59:01,977 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:59:01,977 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:59:01,977 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:59:01,978 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:59:01,978 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:59:01,978 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:59:02,015 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 23:59:02,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-14 23:59:02,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:02,035 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] [2019-10-14 23:59:02,037 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:02,044 INFO L82 PathProgramCache]: Analyzing trace with hash -986634456, now seen corresponding path program 1 times [2019-10-14 23:59:02,053 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:02,054 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615038421] [2019-10-14 23:59:02,054 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:02,054 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:02,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:02,793 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 23:59:02,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615038421] [2019-10-14 23:59:02,794 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:59:02,795 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:59:02,795 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119635807] [2019-10-14 23:59:02,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:59:02,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:02,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:59:02,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:59:02,819 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-10-14 23:59:04,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:04,060 INFO L93 Difference]: Finished difference Result 852 states and 1505 transitions. [2019-10-14 23:59:04,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:59:04,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2019-10-14 23:59:04,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:04,082 INFO L225 Difference]: With dead ends: 852 [2019-10-14 23:59:04,082 INFO L226 Difference]: Without dead ends: 479 [2019-10-14 23:59:04,090 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 23:59:04,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2019-10-14 23:59:04,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 465. [2019-10-14 23:59:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2019-10-14 23:59:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 749 transitions. [2019-10-14 23:59:04,171 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 749 transitions. Word has length 153 [2019-10-14 23:59:04,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:04,173 INFO L462 AbstractCegarLoop]: Abstraction has 465 states and 749 transitions. [2019-10-14 23:59:04,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:59:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 749 transitions. [2019-10-14 23:59:04,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-14 23:59:04,185 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:04,185 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] [2019-10-14 23:59:04,185 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:04,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:04,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1704163947, now seen corresponding path program 1 times [2019-10-14 23:59:04,186 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:04,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591330713] [2019-10-14 23:59:04,188 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:04,188 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:04,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:04,411 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 23:59:04,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591330713] [2019-10-14 23:59:04,413 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:59:04,413 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:59:04,414 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755981751] [2019-10-14 23:59:04,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:59:04,417 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:04,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:59:04,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:59:04,418 INFO L87 Difference]: Start difference. First operand 465 states and 749 transitions. Second operand 6 states. [2019-10-14 23:59:06,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:06,220 INFO L93 Difference]: Finished difference Result 1400 states and 2330 transitions. [2019-10-14 23:59:06,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:59:06,221 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2019-10-14 23:59:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:06,228 INFO L225 Difference]: With dead ends: 1400 [2019-10-14 23:59:06,229 INFO L226 Difference]: Without dead ends: 941 [2019-10-14 23:59:06,231 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 23:59:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2019-10-14 23:59:06,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 900. [2019-10-14 23:59:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 900 states. [2019-10-14 23:59:06,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1440 transitions. [2019-10-14 23:59:06,312 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1440 transitions. Word has length 162 [2019-10-14 23:59:06,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:06,312 INFO L462 AbstractCegarLoop]: Abstraction has 900 states and 1440 transitions. [2019-10-14 23:59:06,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:59:06,313 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1440 transitions. [2019-10-14 23:59:06,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-14 23:59:06,317 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:06,317 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:59:06,318 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:06,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:06,318 INFO L82 PathProgramCache]: Analyzing trace with hash 198136689, now seen corresponding path program 1 times [2019-10-14 23:59:06,318 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:06,319 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865319767] [2019-10-14 23:59:06,319 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:06,319 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:06,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:06,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865319767] [2019-10-14 23:59:06,468 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:59:06,469 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:59:06,469 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136917378] [2019-10-14 23:59:06,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:59:06,470 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:06,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:59:06,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:59:06,471 INFO L87 Difference]: Start difference. First operand 900 states and 1440 transitions. Second operand 5 states. [2019-10-14 23:59:08,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:08,017 INFO L93 Difference]: Finished difference Result 2690 states and 4475 transitions. [2019-10-14 23:59:08,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:59:08,019 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2019-10-14 23:59:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:08,034 INFO L225 Difference]: With dead ends: 2690 [2019-10-14 23:59:08,034 INFO L226 Difference]: Without dead ends: 1796 [2019-10-14 23:59:08,038 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:59:08,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2019-10-14 23:59:08,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1763. [2019-10-14 23:59:08,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1763 states. [2019-10-14 23:59:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2722 transitions. [2019-10-14 23:59:08,133 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2722 transitions. Word has length 163 [2019-10-14 23:59:08,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:08,135 INFO L462 AbstractCegarLoop]: Abstraction has 1763 states and 2722 transitions. [2019-10-14 23:59:08,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:59:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2722 transitions. [2019-10-14 23:59:08,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-14 23:59:08,143 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:08,143 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] [2019-10-14 23:59:08,144 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:08,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1802668228, now seen corresponding path program 1 times [2019-10-14 23:59:08,145 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:08,145 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67341676] [2019-10-14 23:59:08,145 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:08,145 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:08,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:08,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67341676] [2019-10-14 23:59:08,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30000265] [2019-10-14 23:59:08,471 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 23:59:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:08,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:59:08,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:59:08,999 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 23:59:09,000 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:59:09,128 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 23:59:09,128 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:59:09,129 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-14 23:59:09,129 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847140094] [2019-10-14 23:59:09,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:59:09,132 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:09,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:59:09,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:59:09,134 INFO L87 Difference]: Start difference. First operand 1763 states and 2722 transitions. Second operand 3 states. [2019-10-14 23:59:10,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:10,180 INFO L93 Difference]: Finished difference Result 5205 states and 8282 transitions. [2019-10-14 23:59:10,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:59:10,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2019-10-14 23:59:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:10,205 INFO L225 Difference]: With dead ends: 5205 [2019-10-14 23:59:10,205 INFO L226 Difference]: Without dead ends: 3448 [2019-10-14 23:59:10,212 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 331 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:59:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2019-10-14 23:59:10,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 3445. [2019-10-14 23:59:10,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3445 states. [2019-10-14 23:59:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 4859 transitions. [2019-10-14 23:59:10,369 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 4859 transitions. Word has length 165 [2019-10-14 23:59:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:10,370 INFO L462 AbstractCegarLoop]: Abstraction has 3445 states and 4859 transitions. [2019-10-14 23:59:10,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:59:10,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 4859 transitions. [2019-10-14 23:59:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-14 23:59:10,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:10,381 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:59:10,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:59:10,589 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:10,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:10,590 INFO L82 PathProgramCache]: Analyzing trace with hash -531391768, now seen corresponding path program 1 times [2019-10-14 23:59:10,590 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:10,591 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757826608] [2019-10-14 23:59:10,591 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:10,591 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:10,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:10,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757826608] [2019-10-14 23:59:10,740 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:59:10,740 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:59:10,740 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192840221] [2019-10-14 23:59:10,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:59:10,741 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:10,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:59:10,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:59:10,742 INFO L87 Difference]: Start difference. First operand 3445 states and 4859 transitions. Second operand 7 states. [2019-10-14 23:59:12,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:12,359 INFO L93 Difference]: Finished difference Result 10492 states and 16393 transitions. [2019-10-14 23:59:12,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:59:12,359 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 171 [2019-10-14 23:59:12,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:12,412 INFO L225 Difference]: With dead ends: 10492 [2019-10-14 23:59:12,413 INFO L226 Difference]: Without dead ends: 7053 [2019-10-14 23:59:12,424 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:59:12,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7053 states. [2019-10-14 23:59:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7053 to 6904. [2019-10-14 23:59:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6904 states. [2019-10-14 23:59:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 10114 transitions. [2019-10-14 23:59:12,685 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 10114 transitions. Word has length 171 [2019-10-14 23:59:12,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:12,686 INFO L462 AbstractCegarLoop]: Abstraction has 6904 states and 10114 transitions. [2019-10-14 23:59:12,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:59:12,686 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 10114 transitions. [2019-10-14 23:59:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-14 23:59:12,703 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:12,703 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:59:12,703 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:12,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:12,704 INFO L82 PathProgramCache]: Analyzing trace with hash -15837281, now seen corresponding path program 1 times [2019-10-14 23:59:12,704 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:12,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322775537] [2019-10-14 23:59:12,705 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:12,705 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:12,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:12,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322775537] [2019-10-14 23:59:12,824 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:59:12,824 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:59:12,824 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175215637] [2019-10-14 23:59:12,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:59:12,825 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:12,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:59:12,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:59:12,826 INFO L87 Difference]: Start difference. First operand 6904 states and 10114 transitions. Second operand 6 states. [2019-10-14 23:59:14,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:14,404 INFO L93 Difference]: Finished difference Result 19947 states and 31466 transitions. [2019-10-14 23:59:14,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:59:14,405 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 172 [2019-10-14 23:59:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:14,488 INFO L225 Difference]: With dead ends: 19947 [2019-10-14 23:59:14,488 INFO L226 Difference]: Without dead ends: 13049 [2019-10-14 23:59:14,517 INFO L600 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 [2019-10-14 23:59:14,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13049 states. [2019-10-14 23:59:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13049 to 12912. [2019-10-14 23:59:14,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12912 states. [2019-10-14 23:59:14,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12912 states to 12912 states and 18379 transitions. [2019-10-14 23:59:14,963 INFO L78 Accepts]: Start accepts. Automaton has 12912 states and 18379 transitions. Word has length 172 [2019-10-14 23:59:14,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:14,963 INFO L462 AbstractCegarLoop]: Abstraction has 12912 states and 18379 transitions. [2019-10-14 23:59:14,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:59:14,964 INFO L276 IsEmpty]: Start isEmpty. Operand 12912 states and 18379 transitions. [2019-10-14 23:59:14,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-14 23:59:14,996 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:14,997 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:59:14,997 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:14,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1195006296, now seen corresponding path program 1 times [2019-10-14 23:59:14,998 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:14,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548985866] [2019-10-14 23:59:14,998 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:14,998 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:14,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:15,272 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548985866] [2019-10-14 23:59:15,272 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565548653] [2019-10-14 23:59:15,272 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 23:59:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:15,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:59:15,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:59:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:59:15,619 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:59:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:59:15,722 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:59:15,722 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-14 23:59:15,723 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515753877] [2019-10-14 23:59:15,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:59:15,724 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:15,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:59:15,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:59:15,725 INFO L87 Difference]: Start difference. First operand 12912 states and 18379 transitions. Second operand 3 states. [2019-10-14 23:59:17,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:17,031 INFO L93 Difference]: Finished difference Result 31705 states and 46913 transitions. [2019-10-14 23:59:17,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:59:17,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 189 [2019-10-14 23:59:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:17,158 INFO L225 Difference]: With dead ends: 31705 [2019-10-14 23:59:17,158 INFO L226 Difference]: Without dead ends: 18799 [2019-10-14 23:59:17,212 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 376 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 23:59:17,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18799 states. [2019-10-14 23:59:17,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18799 to 18796. [2019-10-14 23:59:17,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18796 states. [2019-10-14 23:59:17,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18796 states to 18796 states and 27557 transitions. [2019-10-14 23:59:17,814 INFO L78 Accepts]: Start accepts. Automaton has 18796 states and 27557 transitions. Word has length 189 [2019-10-14 23:59:17,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:17,815 INFO L462 AbstractCegarLoop]: Abstraction has 18796 states and 27557 transitions. [2019-10-14 23:59:17,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:59:17,815 INFO L276 IsEmpty]: Start isEmpty. Operand 18796 states and 27557 transitions. [2019-10-14 23:59:17,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-14 23:59:17,869 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:17,869 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 23:59:18,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:59:18,083 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:18,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:18,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1204066993, now seen corresponding path program 1 times [2019-10-14 23:59:18,084 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:18,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552875990] [2019-10-14 23:59:18,085 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:18,085 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:18,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 66 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:59:18,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552875990] [2019-10-14 23:59:18,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63671353] [2019-10-14 23:59:18,296 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 23:59:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:18,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:59:18,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:59:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 23:59:18,737 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:59:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 23:59:18,980 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:59:18,981 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-14 23:59:18,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504377122] [2019-10-14 23:59:18,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:59:18,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:18,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:59:18,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:59:18,983 INFO L87 Difference]: Start difference. First operand 18796 states and 27557 transitions. Second operand 3 states. [2019-10-14 23:59:20,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:20,628 INFO L93 Difference]: Finished difference Result 50351 states and 74898 transitions. [2019-10-14 23:59:20,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:59:20,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2019-10-14 23:59:20,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:20,815 INFO L225 Difference]: With dead ends: 50351 [2019-10-14 23:59:20,815 INFO L226 Difference]: Without dead ends: 31561 [2019-10-14 23:59:20,884 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 430 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 23:59:20,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31561 states. [2019-10-14 23:59:22,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31561 to 31531. [2019-10-14 23:59:22,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31531 states. [2019-10-14 23:59:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31531 states to 31531 states and 46377 transitions. [2019-10-14 23:59:22,743 INFO L78 Accepts]: Start accepts. Automaton has 31531 states and 46377 transitions. Word has length 216 [2019-10-14 23:59:22,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:22,744 INFO L462 AbstractCegarLoop]: Abstraction has 31531 states and 46377 transitions. [2019-10-14 23:59:22,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:59:22,744 INFO L276 IsEmpty]: Start isEmpty. Operand 31531 states and 46377 transitions. [2019-10-14 23:59:22,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-14 23:59:22,823 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:22,824 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 23:59:23,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:59:23,039 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:23,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:23,040 INFO L82 PathProgramCache]: Analyzing trace with hash 627733957, now seen corresponding path program 1 times [2019-10-14 23:59:23,040 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:23,044 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152921568] [2019-10-14 23:59:23,048 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:23,048 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:23,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:23,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152921568] [2019-10-14 23:59:23,309 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:59:23,310 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:59:23,311 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211251360] [2019-10-14 23:59:23,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:59:23,312 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:23,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:59:23,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:59:23,315 INFO L87 Difference]: Start difference. First operand 31531 states and 46377 transitions. Second operand 6 states. [2019-10-14 23:59:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:25,475 INFO L93 Difference]: Finished difference Result 63365 states and 95333 transitions. [2019-10-14 23:59:25,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:59:25,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 216 [2019-10-14 23:59:25,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:25,630 INFO L225 Difference]: With dead ends: 63365 [2019-10-14 23:59:25,631 INFO L226 Difference]: Without dead ends: 31840 [2019-10-14 23:59:25,708 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 23:59:25,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31840 states. [2019-10-14 23:59:26,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31840 to 31641. [2019-10-14 23:59:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31641 states. [2019-10-14 23:59:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31641 states to 31641 states and 43132 transitions. [2019-10-14 23:59:26,577 INFO L78 Accepts]: Start accepts. Automaton has 31641 states and 43132 transitions. Word has length 216 [2019-10-14 23:59:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:26,578 INFO L462 AbstractCegarLoop]: Abstraction has 31641 states and 43132 transitions. [2019-10-14 23:59:26,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:59:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 31641 states and 43132 transitions. [2019-10-14 23:59:26,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-10-14 23:59:26,860 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:26,861 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:59:26,861 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:26,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1564408529, now seen corresponding path program 1 times [2019-10-14 23:59:26,862 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:26,862 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296028564] [2019-10-14 23:59:26,862 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:26,862 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:26,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:59:27,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296028564] [2019-10-14 23:59:27,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34874333] [2019-10-14 23:59:27,043 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 23:59:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:27,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:59:27,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:59:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:59:27,371 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:59:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:59:27,489 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [874668580] [2019-10-14 23:59:27,498 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 226 [2019-10-14 23:59:27,570 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:59:27,570 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)