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/Problem18_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:10:55,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:10:55,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:10:55,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:10:55,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:10:55,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:10:55,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:10:55,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:10:55,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:10:55,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:10:55,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:10:55,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:10:55,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:10:55,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:10:55,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:10:55,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:10:55,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:10:55,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:10:55,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:10:55,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:10:55,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:10:55,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:10:55,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:10:55,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:10:55,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:10:55,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:10:55,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:10:55,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:10:55,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:10:55,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:10:55,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:10:55,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:10:55,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:10:55,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:10:55,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:10:55,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:10:55,959 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 [2019-10-13 20:10:55,986 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:10:55,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:10:55,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:10:55,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:10:55,989 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:10:55,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:10:55,989 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:10:55,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:10:55,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:10:55,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:10:55,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:10:55,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:10:55,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:10:55,992 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:10:55,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:10:55,992 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:10:55,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:10:55,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:10:55,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:10:55,993 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:10:55,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:10:55,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:10:55,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:10:55,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:10:55,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:10:55,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:10:55,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:10:55,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:10:55,995 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 [2019-10-13 20:10:56,278 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:10:56,297 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:10:56,300 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:10:56,302 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:10:56,302 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:10:56,303 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label21.c [2019-10-13 20:10:56,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e70aec351/45f9d484eacd4e83aaf1048a12bfa7d2/FLAGd872da2cc [2019-10-13 20:10:57,134 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:10:57,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label21.c [2019-10-13 20:10:57,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e70aec351/45f9d484eacd4e83aaf1048a12bfa7d2/FLAGd872da2cc [2019-10-13 20:10:57,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e70aec351/45f9d484eacd4e83aaf1048a12bfa7d2 [2019-10-13 20:10:57,687 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:10:57,688 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:10:57,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:57,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:10:57,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:10:57,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:57" (1/1) ... [2019-10-13 20:10:57,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ce2b1cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:57, skipping insertion in model container [2019-10-13 20:10:57,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:57" (1/1) ... [2019-10-13 20:10:57,705 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:10:57,865 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:10:59,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:59,164 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:10:59,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:59,715 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:10:59,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:59 WrapperNode [2019-10-13 20:10:59,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:59,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:10:59,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:10:59,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:10:59,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:59" (1/1) ... [2019-10-13 20:10:59,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:59" (1/1) ... [2019-10-13 20:10:59,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:59" (1/1) ... [2019-10-13 20:10:59,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:59" (1/1) ... [2019-10-13 20:10:59,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:59" (1/1) ... [2019-10-13 20:10:59,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:59" (1/1) ... [2019-10-13 20:10:59,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:59" (1/1) ... [2019-10-13 20:10:59,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:10:59,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:10:59,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:10:59,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:11:00,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:59" (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 [2019-10-13 20:11:00,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:11:00,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:11:00,085 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:11:00,085 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:11:00,085 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:11:00,086 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:11:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:11:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:11:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:11:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:11:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:11:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:11:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:11:00,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:11:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:11:04,292 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:11:04,293 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:11:04,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:04 BoogieIcfgContainer [2019-10-13 20:11:04,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:11:04,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:11:04,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:11:04,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:11:04,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:10:57" (1/3) ... [2019-10-13 20:11:04,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692fb758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:04, skipping insertion in model container [2019-10-13 20:11:04,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:59" (2/3) ... [2019-10-13 20:11:04,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692fb758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:04, skipping insertion in model container [2019-10-13 20:11:04,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:04" (3/3) ... [2019-10-13 20:11:04,304 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label21.c [2019-10-13 20:11:04,316 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:11:04,326 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:11:04,338 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:11:04,372 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:11:04,372 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:11:04,372 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:11:04,373 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:11:04,373 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:11:04,373 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:11:04,373 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:11:04,373 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:11:04,406 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 20:11:04,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-13 20:11:04,415 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:04,417 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] [2019-10-13 20:11:04,418 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:04,424 INFO L82 PathProgramCache]: Analyzing trace with hash -242469919, now seen corresponding path program 1 times [2019-10-13 20:11:04,434 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:04,434 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624410158] [2019-10-13 20:11:04,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:04,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:04,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:04,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:04,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624410158] [2019-10-13 20:11:04,834 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:04,834 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:11:04,835 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659252664] [2019-10-13 20:11:04,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:11:04,843 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:04,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:11:04,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:11:04,863 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-13 20:11:09,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:09,433 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-13 20:11:09,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:11:09,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2019-10-13 20:11:09,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:09,476 INFO L225 Difference]: With dead ends: 2248 [2019-10-13 20:11:09,477 INFO L226 Difference]: Without dead ends: 1412 [2019-10-13 20:11:09,486 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:11:09,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-13 20:11:09,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-13 20:11:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-13 20:11:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-13 20:11:09,635 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 64 [2019-10-13 20:11:09,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:09,636 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-13 20:11:09,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:11:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-13 20:11:09,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 20:11:09,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:09,643 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:11:09,643 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:09,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:09,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1527115477, now seen corresponding path program 1 times [2019-10-13 20:11:09,644 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:09,644 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942273298] [2019-10-13 20:11:09,644 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:09,645 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:09,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:09,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942273298] [2019-10-13 20:11:09,893 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:09,894 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:09,894 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220870154] [2019-10-13 20:11:09,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:09,897 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:09,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:09,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:09,897 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-13 20:11:15,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:15,269 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-10-13 20:11:15,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:15,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2019-10-13 20:11:15,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:15,295 INFO L225 Difference]: With dead ends: 4294 [2019-10-13 20:11:15,296 INFO L226 Difference]: Without dead ends: 2888 [2019-10-13 20:11:15,300 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 [2019-10-13 20:11:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-13 20:11:15,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-10-13 20:11:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-13 20:11:15,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 5126 transitions. [2019-10-13 20:11:15,406 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 5126 transitions. Word has length 137 [2019-10-13 20:11:15,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:15,409 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 5126 transitions. [2019-10-13 20:11:15,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:15,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 5126 transitions. [2019-10-13 20:11:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-10-13 20:11:15,422 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:15,422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:11:15,423 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:15,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:15,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1106833084, now seen corresponding path program 1 times [2019-10-13 20:11:15,424 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:15,425 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752927380] [2019-10-13 20:11:15,425 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:15,425 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:15,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:15,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752927380] [2019-10-13 20:11:15,763 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:15,763 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:15,764 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172818590] [2019-10-13 20:11:15,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:15,765 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:15,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:15,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:15,765 INFO L87 Difference]: Start difference. First operand 2864 states and 5126 transitions. Second operand 6 states. [2019-10-13 20:11:20,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:20,704 INFO L93 Difference]: Finished difference Result 7213 states and 12908 transitions. [2019-10-13 20:11:20,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:20,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 226 [2019-10-13 20:11:20,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:20,739 INFO L225 Difference]: With dead ends: 7213 [2019-10-13 20:11:20,739 INFO L226 Difference]: Without dead ends: 4355 [2019-10-13 20:11:20,746 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 [2019-10-13 20:11:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4355 states. [2019-10-13 20:11:20,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4355 to 4331. [2019-10-13 20:11:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4331 states. [2019-10-13 20:11:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 7302 transitions. [2019-10-13 20:11:20,881 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 7302 transitions. Word has length 226 [2019-10-13 20:11:20,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:20,883 INFO L462 AbstractCegarLoop]: Abstraction has 4331 states and 7302 transitions. [2019-10-13 20:11:20,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:20,883 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 7302 transitions. [2019-10-13 20:11:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2019-10-13 20:11:20,889 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:20,890 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:11:20,890 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:20,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:20,890 INFO L82 PathProgramCache]: Analyzing trace with hash -467155753, now seen corresponding path program 1 times [2019-10-13 20:11:20,891 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:20,891 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642338752] [2019-10-13 20:11:20,891 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:20,892 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:20,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 114 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:11:21,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642338752] [2019-10-13 20:11:21,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927945999] [2019-10-13 20:11:21,216 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 [2019-10-13 20:11:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:21,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:11:21,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:11:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-13 20:11:21,634 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:11:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 114 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:11:21,841 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:11:21,842 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:11:21,842 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439517566] [2019-10-13 20:11:21,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:11:21,843 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:21,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:11:21,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:11:21,844 INFO L87 Difference]: Start difference. First operand 4331 states and 7302 transitions. Second operand 5 states. [2019-10-13 20:11:27,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:27,323 INFO L93 Difference]: Finished difference Result 10979 states and 18825 transitions. [2019-10-13 20:11:27,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:27,324 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 268 [2019-10-13 20:11:27,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:27,356 INFO L225 Difference]: With dead ends: 10979 [2019-10-13 20:11:27,356 INFO L226 Difference]: Without dead ends: 6654 [2019-10-13 20:11:27,369 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 532 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:11:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2019-10-13 20:11:27,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 6600. [2019-10-13 20:11:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6600 states. [2019-10-13 20:11:27,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6600 states to 6600 states and 10776 transitions. [2019-10-13 20:11:27,607 INFO L78 Accepts]: Start accepts. Automaton has 6600 states and 10776 transitions. Word has length 268 [2019-10-13 20:11:27,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:27,608 INFO L462 AbstractCegarLoop]: Abstraction has 6600 states and 10776 transitions. [2019-10-13 20:11:27,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:11:27,608 INFO L276 IsEmpty]: Start isEmpty. Operand 6600 states and 10776 transitions. [2019-10-13 20:11:27,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-10-13 20:11:27,615 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:27,615 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:11:27,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:11:27,820 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:27,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:27,820 INFO L82 PathProgramCache]: Analyzing trace with hash 767703552, now seen corresponding path program 1 times [2019-10-13 20:11:27,820 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:27,821 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563850073] [2019-10-13 20:11:27,821 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:27,821 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:27,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:28,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563850073] [2019-10-13 20:11:28,253 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:28,254 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:28,254 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186265977] [2019-10-13 20:11:28,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:28,255 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:28,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:28,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:28,256 INFO L87 Difference]: Start difference. First operand 6600 states and 10776 transitions. Second operand 6 states. [2019-10-13 20:11:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:33,088 INFO L93 Difference]: Finished difference Result 15532 states and 25737 transitions. [2019-10-13 20:11:33,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:33,089 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 276 [2019-10-13 20:11:33,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:33,138 INFO L225 Difference]: With dead ends: 15532 [2019-10-13 20:11:33,138 INFO L226 Difference]: Without dead ends: 8938 [2019-10-13 20:11:33,156 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 [2019-10-13 20:11:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8938 states.