java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:56:21,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:56:21,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:56:22,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:56:22,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:56:22,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:56:22,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:56:22,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:56:22,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:56:22,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:56:22,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:56:22,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:56:22,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:56:22,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:56:22,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:56:22,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:56:22,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:56:22,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:56:22,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:56:22,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:56:22,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:56:22,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:56:22,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:56:22,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:56:22,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:56:22,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:56:22,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:56:22,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:56:22,035 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:56:22,036 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:56:22,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:56:22,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:56:22,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:56:22,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:56:22,042 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:56:22,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:56:22,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:56:22,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:56:22,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:56:22,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:56:22,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:56:22,048 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 23:56:22,073 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:56:22,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:56:22,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:56:22,078 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:56:22,079 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:56:22,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:56:22,079 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:56:22,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:56:22,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:56:22,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:56:22,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:56:22,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:56:22,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:56:22,081 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:56:22,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:56:22,082 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:56:22,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:56:22,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:56:22,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:56:22,083 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:56:22,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:56:22,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:56:22,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:56:22,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:56:22,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:56:22,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:56:22,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:56:22,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:56:22,085 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 23:56:22,368 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:56:22,387 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:56:22,391 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:56:22,392 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:56:22,393 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:56:22,393 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label24.c [2019-10-14 23:56:22,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c367e1c98/eb4ad32e34c2470daf947ce7af61a231/FLAGf7f974d3d [2019-10-14 23:56:23,058 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:56:23,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label24.c [2019-10-14 23:56:23,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c367e1c98/eb4ad32e34c2470daf947ce7af61a231/FLAGf7f974d3d [2019-10-14 23:56:23,327 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c367e1c98/eb4ad32e34c2470daf947ce7af61a231 [2019-10-14 23:56:23,337 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:56:23,338 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:56:23,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:23,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:56:23,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:56:23,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:23" (1/1) ... [2019-10-14 23:56:23,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cf983e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:23, skipping insertion in model container [2019-10-14 23:56:23,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:23" (1/1) ... [2019-10-14 23:56:23,355 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:56:23,419 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:56:23,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:23,959 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:56:24,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:24,077 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:56:24,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:24 WrapperNode [2019-10-14 23:56:24,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:24,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:56:24,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:56:24,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:56:24,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:24" (1/1) ... [2019-10-14 23:56:24,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:24" (1/1) ... [2019-10-14 23:56:24,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:24" (1/1) ... [2019-10-14 23:56:24,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:24" (1/1) ... [2019-10-14 23:56:24,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:24" (1/1) ... [2019-10-14 23:56:24,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:24" (1/1) ... [2019-10-14 23:56:24,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:24" (1/1) ... [2019-10-14 23:56:24,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:56:24,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:56:24,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:56:24,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:56:24,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:24" (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 23:56:24,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:56:24,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:56:24,241 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:56:24,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:56:24,242 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:56:24,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:56:24,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:56:24,242 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:56:24,242 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:56:24,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:56:24,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:56:25,389 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:56:25,389 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:56:25,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:25 BoogieIcfgContainer [2019-10-14 23:56:25,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:56:25,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:56:25,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:56:25,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:56:25,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:56:23" (1/3) ... [2019-10-14 23:56:25,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172ab1ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:25, skipping insertion in model container [2019-10-14 23:56:25,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:24" (2/3) ... [2019-10-14 23:56:25,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172ab1ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:25, skipping insertion in model container [2019-10-14 23:56:25,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:25" (3/3) ... [2019-10-14 23:56:25,400 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label24.c [2019-10-14 23:56:25,411 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:56:25,420 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:56:25,432 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:56:25,460 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:56:25,460 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:56:25,460 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:56:25,461 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:56:25,461 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:56:25,461 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:56:25,461 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:56:25,462 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:56:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:56:25,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 23:56:25,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:25,501 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] [2019-10-14 23:56:25,503 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:25,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:25,510 INFO L82 PathProgramCache]: Analyzing trace with hash -382656490, now seen corresponding path program 1 times [2019-10-14 23:56:25,520 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:25,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909525874] [2019-10-14 23:56:25,520 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:25,521 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:25,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:26,010 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 23:56:26,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909525874] [2019-10-14 23:56:26,012 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:26,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:56:26,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335018917] [2019-10-14 23:56:26,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:26,025 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:26,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:26,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:56:26,048 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:56:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:26,979 INFO L93 Difference]: Finished difference Result 618 states and 1057 transitions. [2019-10-14 23:56:26,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:26,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2019-10-14 23:56:26,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:27,012 INFO L225 Difference]: With dead ends: 618 [2019-10-14 23:56:27,013 INFO L226 Difference]: Without dead ends: 320 [2019-10-14 23:56:27,024 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 23:56:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-10-14 23:56:27,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 319. [2019-10-14 23:56:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-10-14 23:56:27,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 466 transitions. [2019-10-14 23:56:27,126 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 466 transitions. Word has length 120 [2019-10-14 23:56:27,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:27,127 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 466 transitions. [2019-10-14 23:56:27,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 466 transitions. [2019-10-14 23:56:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-14 23:56:27,133 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:27,133 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] [2019-10-14 23:56:27,133 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:27,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:27,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1033455567, now seen corresponding path program 1 times [2019-10-14 23:56:27,134 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:27,135 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350020625] [2019-10-14 23:56:27,135 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:27,135 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:27,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:27,405 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 23:56:27,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350020625] [2019-10-14 23:56:27,406 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:27,406 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:56:27,406 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662355822] [2019-10-14 23:56:27,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:56:27,408 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:27,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:56:27,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:56:27,409 INFO L87 Difference]: Start difference. First operand 319 states and 466 transitions. Second operand 5 states. [2019-10-14 23:56:28,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:28,098 INFO L93 Difference]: Finished difference Result 719 states and 1091 transitions. [2019-10-14 23:56:28,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:56:28,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2019-10-14 23:56:28,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:28,105 INFO L225 Difference]: With dead ends: 719 [2019-10-14 23:56:28,106 INFO L226 Difference]: Without dead ends: 319 [2019-10-14 23:56:28,107 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:56:28,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-10-14 23:56:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2019-10-14 23:56:28,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-10-14 23:56:28,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 463 transitions. [2019-10-14 23:56:28,127 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 463 transitions. Word has length 128 [2019-10-14 23:56:28,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:28,128 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 463 transitions. [2019-10-14 23:56:28,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:56:28,128 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 463 transitions. [2019-10-14 23:56:28,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-14 23:56:28,131 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:28,132 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:28,132 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:28,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:28,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1674841520, now seen corresponding path program 1 times [2019-10-14 23:56:28,133 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:28,133 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015752076] [2019-10-14 23:56:28,133 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:28,133 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:28,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:28,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015752076] [2019-10-14 23:56:28,293 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:28,293 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:56:28,293 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000978476] [2019-10-14 23:56:28,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:56:28,294 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:28,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:56:28,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:56:28,295 INFO L87 Difference]: Start difference. First operand 319 states and 463 transitions. Second operand 6 states. [2019-10-14 23:56:29,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:29,156 INFO L93 Difference]: Finished difference Result 941 states and 1396 transitions. [2019-10-14 23:56:29,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:56:29,158 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2019-10-14 23:56:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:29,164 INFO L225 Difference]: With dead ends: 941 [2019-10-14 23:56:29,164 INFO L226 Difference]: Without dead ends: 628 [2019-10-14 23:56:29,166 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 23:56:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2019-10-14 23:56:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 620. [2019-10-14 23:56:29,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-14 23:56:29,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 883 transitions. [2019-10-14 23:56:29,218 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 883 transitions. Word has length 153 [2019-10-14 23:56:29,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:29,219 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 883 transitions. [2019-10-14 23:56:29,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:56:29,219 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 883 transitions. [2019-10-14 23:56:29,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-14 23:56:29,228 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:29,229 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:29,229 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:29,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:29,229 INFO L82 PathProgramCache]: Analyzing trace with hash 549018262, now seen corresponding path program 1 times [2019-10-14 23:56:29,230 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:29,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950468019] [2019-10-14 23:56:29,231 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:29,232 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:29,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:29,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950468019] [2019-10-14 23:56:29,434 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:29,434 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:56:29,434 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161656877] [2019-10-14 23:56:29,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:29,435 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:29,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:29,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:56:29,436 INFO L87 Difference]: Start difference. First operand 620 states and 883 transitions. Second operand 3 states. [2019-10-14 23:56:30,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:30,039 INFO L93 Difference]: Finished difference Result 1828 states and 2673 transitions. [2019-10-14 23:56:30,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:30,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2019-10-14 23:56:30,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:30,048 INFO L225 Difference]: With dead ends: 1828 [2019-10-14 23:56:30,048 INFO L226 Difference]: Without dead ends: 1214 [2019-10-14 23:56:30,050 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 23:56:30,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2019-10-14 23:56:30,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1065. [2019-10-14 23:56:30,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-10-14 23:56:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1499 transitions. [2019-10-14 23:56:30,113 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1499 transitions. Word has length 154 [2019-10-14 23:56:30,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:30,114 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1499 transitions. [2019-10-14 23:56:30,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1499 transitions. [2019-10-14 23:56:30,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-14 23:56:30,119 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:30,119 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:30,120 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:30,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:30,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1668983788, now seen corresponding path program 1 times [2019-10-14 23:56:30,121 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:30,121 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506336448] [2019-10-14 23:56:30,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:30,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:30,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:30,428 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:30,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506336448] [2019-10-14 23:56:30,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222547580] [2019-10-14 23:56:30,431 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 23:56:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:30,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:56:30,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:56:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:30,726 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:56:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:30,879 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:56:30,879 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-14 23:56:30,879 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391997519] [2019-10-14 23:56:30,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:30,881 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:30,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:30,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:56:30,882 INFO L87 Difference]: Start difference. First operand 1065 states and 1499 transitions. Second operand 3 states. [2019-10-14 23:56:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:31,453 INFO L93 Difference]: Finished difference Result 2995 states and 4262 transitions. [2019-10-14 23:56:31,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:31,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2019-10-14 23:56:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:31,466 INFO L225 Difference]: With dead ends: 2995 [2019-10-14 23:56:31,467 INFO L226 Difference]: Without dead ends: 1936 [2019-10-14 23:56:31,470 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 342 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:56:31,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2019-10-14 23:56:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1500. [2019-10-14 23:56:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1500 states. [2019-10-14 23:56:31,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 2103 transitions. [2019-10-14 23:56:31,535 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 2103 transitions. Word has length 171 [2019-10-14 23:56:31,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:31,536 INFO L462 AbstractCegarLoop]: Abstraction has 1500 states and 2103 transitions. [2019-10-14 23:56:31,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:31,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 2103 transitions. [2019-10-14 23:56:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-14 23:56:31,544 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:31,544 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 23:56:31,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:56:31,754 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:31,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:31,754 INFO L82 PathProgramCache]: Analyzing trace with hash 401656295, now seen corresponding path program 1 times [2019-10-14 23:56:31,754 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:31,754 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456473055] [2019-10-14 23:56:31,754 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:31,755 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:31,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 65 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:56:31,881 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456473055] [2019-10-14 23:56:31,881 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541156301] [2019-10-14 23:56:31,881 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 23:56:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:32,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:56:32,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:56:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 76 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:32,107 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:56:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 76 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:32,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [182119144] [2019-10-14 23:56:32,201 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 193 [2019-10-14 23:56:32,254 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:56:32,254 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)