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/Problem01_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:53:55,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:53:55,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:53:55,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:53:55,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:53:55,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:53:55,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:53:55,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:53:55,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:53:55,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:53:55,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:53:55,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:53:55,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:53:55,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:53:55,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:53:55,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:53:55,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:53:55,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:53:55,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:53:55,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:53:55,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:53:55,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:53:55,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:53:55,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:53:55,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:53:55,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:53:55,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:53:55,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:53:55,909 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:53:55,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:53:55,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:53:55,911 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:53:55,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:53:55,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:53:55,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:53:55,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:53:55,919 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 23:53:55,941 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:53:55,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:53:55,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:53:55,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:53:55,944 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:53:55,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:53:55,944 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:53:55,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:53:55,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:53:55,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:53:55,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:53:55,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:53:55,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:53:55,947 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:53:55,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:53:55,947 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:53:55,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:53:55,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:53:55,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:53:55,948 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:53:55,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:53:55,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:53:55,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:53:55,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:53:55,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:53:55,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:53:55,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:53:55,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:53:55,950 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 23:53:56,260 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:53:56,275 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:53:56,279 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:53:56,281 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:53:56,281 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:53:56,282 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label30.c [2019-10-14 23:53:56,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63224cd8c/c7b727db16fb409291e65a9fe533b2a1/FLAGac9537700 [2019-10-14 23:53:56,939 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:53:56,942 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label30.c [2019-10-14 23:53:56,957 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63224cd8c/c7b727db16fb409291e65a9fe533b2a1/FLAGac9537700 [2019-10-14 23:53:57,240 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63224cd8c/c7b727db16fb409291e65a9fe533b2a1 [2019-10-14 23:53:57,250 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:53:57,252 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:53:57,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:57,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:53:57,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:53:57,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:57" (1/1) ... [2019-10-14 23:53:57,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e788b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:57, skipping insertion in model container [2019-10-14 23:53:57,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:57" (1/1) ... [2019-10-14 23:53:57,268 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:53:57,313 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:53:57,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:57,917 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:53:58,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:58,023 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:53:58,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:58 WrapperNode [2019-10-14 23:53:58,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:58,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:53:58,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:53:58,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:53:58,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:58" (1/1) ... [2019-10-14 23:53:58,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:58" (1/1) ... [2019-10-14 23:53:58,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:58" (1/1) ... [2019-10-14 23:53:58,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:58" (1/1) ... [2019-10-14 23:53:58,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:58" (1/1) ... [2019-10-14 23:53:58,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:58" (1/1) ... [2019-10-14 23:53:58,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:58" (1/1) ... [2019-10-14 23:53:58,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:53:58,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:53:58,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:53:58,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:53:58,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:58" (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 23:53:58,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:53:58,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:53:58,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:53:58,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:53:58,216 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:53:58,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:53:58,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:53:58,218 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:53:58,218 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:53:58,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:53:58,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:53:59,370 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:53:59,371 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:53:59,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:59 BoogieIcfgContainer [2019-10-14 23:53:59,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:53:59,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:53:59,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:53:59,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:53:59,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:53:57" (1/3) ... [2019-10-14 23:53:59,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6110cb9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:59, skipping insertion in model container [2019-10-14 23:53:59,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:58" (2/3) ... [2019-10-14 23:53:59,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6110cb9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:59, skipping insertion in model container [2019-10-14 23:53:59,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:59" (3/3) ... [2019-10-14 23:53:59,394 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label30.c [2019-10-14 23:53:59,404 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:53:59,414 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:53:59,425 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:53:59,461 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:53:59,461 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:53:59,462 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:53:59,462 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:53:59,462 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:53:59,462 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:53:59,462 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:53:59,462 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:53:59,496 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:53:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-14 23:53:59,510 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:59,511 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:59,512 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:59,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:59,517 INFO L82 PathProgramCache]: Analyzing trace with hash -152148385, now seen corresponding path program 1 times [2019-10-14 23:53:59,524 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:59,525 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301479958] [2019-10-14 23:53:59,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:59,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:59,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:00,114 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 23:54:00,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301479958] [2019-10-14 23:54:00,116 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:00,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:54:00,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212820664] [2019-10-14 23:54:00,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:54:00,123 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:00,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:54:00,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:54:00,141 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 4 states. [2019-10-14 23:54:01,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:01,582 INFO L93 Difference]: Finished difference Result 698 states and 1223 transitions. [2019-10-14 23:54:01,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:54:01,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-10-14 23:54:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:01,604 INFO L225 Difference]: With dead ends: 698 [2019-10-14 23:54:01,604 INFO L226 Difference]: Without dead ends: 413 [2019-10-14 23:54:01,611 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:54:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2019-10-14 23:54:01,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 278. [2019-10-14 23:54:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:54:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 406 transitions. [2019-10-14 23:54:01,686 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 406 transitions. Word has length 131 [2019-10-14 23:54:01,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:01,687 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 406 transitions. [2019-10-14 23:54:01,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:54:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 406 transitions. [2019-10-14 23:54:01,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-14 23:54:01,698 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:01,698 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:54:01,699 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:01,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:01,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1159631208, now seen corresponding path program 1 times [2019-10-14 23:54:01,700 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:01,700 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430210380] [2019-10-14 23:54:01,700 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:01,701 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:01,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:01,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430210380] [2019-10-14 23:54:01,879 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:01,879 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:54:01,880 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267201971] [2019-10-14 23:54:01,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:54:01,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:01,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:54:01,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:54:01,890 INFO L87 Difference]: Start difference. First operand 278 states and 406 transitions. Second operand 6 states. [2019-10-14 23:54:02,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:02,725 INFO L93 Difference]: Finished difference Result 703 states and 1045 transitions. [2019-10-14 23:54:02,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:54:02,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-14 23:54:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:02,732 INFO L225 Difference]: With dead ends: 703 [2019-10-14 23:54:02,732 INFO L226 Difference]: Without dead ends: 431 [2019-10-14 23:54:02,734 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:54:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-10-14 23:54:02,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 417. [2019-10-14 23:54:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2019-10-14 23:54:02,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 597 transitions. [2019-10-14 23:54:02,795 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 597 transitions. Word has length 141 [2019-10-14 23:54:02,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:02,795 INFO L462 AbstractCegarLoop]: Abstraction has 417 states and 597 transitions. [2019-10-14 23:54:02,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:54:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 597 transitions. [2019-10-14 23:54:02,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-14 23:54:02,804 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:02,805 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:54:02,805 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:02,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:02,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1563736858, now seen corresponding path program 1 times [2019-10-14 23:54:02,806 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:02,806 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232201900] [2019-10-14 23:54:02,806 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:02,806 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:02,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:03,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232201900] [2019-10-14 23:54:03,159 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:03,159 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:54:03,159 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542002072] [2019-10-14 23:54:03,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:54:03,160 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:03,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:54:03,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:54:03,161 INFO L87 Difference]: Start difference. First operand 417 states and 597 transitions. Second operand 5 states. [2019-10-14 23:54:03,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:03,895 INFO L93 Difference]: Finished difference Result 927 states and 1352 transitions. [2019-10-14 23:54:03,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:54:03,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2019-10-14 23:54:03,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:03,901 INFO L225 Difference]: With dead ends: 927 [2019-10-14 23:54:03,902 INFO L226 Difference]: Without dead ends: 415 [2019-10-14 23:54:03,903 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 23:54:03,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2019-10-14 23:54:03,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2019-10-14 23:54:03,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2019-10-14 23:54:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 545 transitions. [2019-10-14 23:54:03,927 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 545 transitions. Word has length 142 [2019-10-14 23:54:03,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:03,927 INFO L462 AbstractCegarLoop]: Abstraction has 415 states and 545 transitions. [2019-10-14 23:54:03,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:54:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 545 transitions. [2019-10-14 23:54:03,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-14 23:54:03,932 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:03,933 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:03,933 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:03,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:03,933 INFO L82 PathProgramCache]: Analyzing trace with hash -77416850, now seen corresponding path program 1 times [2019-10-14 23:54:03,934 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:03,934 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643978565] [2019-10-14 23:54:03,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:03,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:03,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:04,096 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643978565] [2019-10-14 23:54:04,096 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:04,096 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:54:04,097 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97937559] [2019-10-14 23:54:04,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:04,098 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:04,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:04,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:04,098 INFO L87 Difference]: Start difference. First operand 415 states and 545 transitions. Second operand 3 states. [2019-10-14 23:54:04,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:04,532 INFO L93 Difference]: Finished difference Result 1231 states and 1647 transitions. [2019-10-14 23:54:04,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:04,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2019-10-14 23:54:04,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:04,539 INFO L225 Difference]: With dead ends: 1231 [2019-10-14 23:54:04,539 INFO L226 Difference]: Without dead ends: 822 [2019-10-14 23:54:04,540 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 23:54:04,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2019-10-14 23:54:04,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 822. [2019-10-14 23:54:04,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 822 states. [2019-10-14 23:54:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1060 transitions. [2019-10-14 23:54:04,594 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1060 transitions. Word has length 146 [2019-10-14 23:54:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:04,595 INFO L462 AbstractCegarLoop]: Abstraction has 822 states and 1060 transitions. [2019-10-14 23:54:04,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1060 transitions. [2019-10-14 23:54:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-14 23:54:04,600 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:04,600 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:54:04,600 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:04,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:04,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1784447858, now seen corresponding path program 1 times [2019-10-14 23:54:04,601 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:04,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037782259] [2019-10-14 23:54:04,601 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:04,602 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:04,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:04,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037782259] [2019-10-14 23:54:04,708 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:04,709 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:54:04,709 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195367186] [2019-10-14 23:54:04,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:54:04,710 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:04,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:54:04,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:54:04,711 INFO L87 Difference]: Start difference. First operand 822 states and 1060 transitions. Second operand 6 states. [2019-10-14 23:54:05,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:05,514 INFO L93 Difference]: Finished difference Result 2083 states and 2796 transitions. [2019-10-14 23:54:05,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:54:05,515 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2019-10-14 23:54:05,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:05,524 INFO L225 Difference]: With dead ends: 2083 [2019-10-14 23:54:05,524 INFO L226 Difference]: Without dead ends: 1267 [2019-10-14 23:54:05,527 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 23:54:05,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2019-10-14 23:54:05,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1112. [2019-10-14 23:54:05,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-10-14 23:54:05,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1401 transitions. [2019-10-14 23:54:05,577 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1401 transitions. Word has length 162 [2019-10-14 23:54:05,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:05,578 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1401 transitions. [2019-10-14 23:54:05,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:54:05,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1401 transitions. [2019-10-14 23:54:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-14 23:54:05,583 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:05,583 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:54:05,583 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:05,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:05,584 INFO L82 PathProgramCache]: Analyzing trace with hash 800655393, now seen corresponding path program 1 times [2019-10-14 23:54:05,584 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:05,584 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082790097] [2019-10-14 23:54:05,585 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:05,585 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:05,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:05,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082790097] [2019-10-14 23:54:05,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377145705] [2019-10-14 23:54:05,723 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 23:54:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:05,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:54:05,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:06,020 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:06,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1054264176] [2019-10-14 23:54:06,203 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 175 [2019-10-14 23:54:06,289 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:54:06,290 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)