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_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:53:03,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:53:03,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:53:03,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:53:03,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:53:03,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:53:03,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:53:03,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:53:03,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:53:03,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:53:03,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:53:03,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:53:03,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:53:03,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:53:03,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:53:03,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:53:03,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:53:03,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:53:03,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:53:03,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:53:03,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:53:03,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:53:03,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:53:03,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:53:03,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:53:03,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:53:03,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:53:03,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:53:03,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:53:03,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:53:03,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:53:03,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:53:03,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:53:03,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:53:03,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:53:03,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:53:03,774 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 23:53:03,794 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:53:03,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:53:03,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:53:03,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:53:03,797 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:53:03,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:53:03,798 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:53:03,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:53:03,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:53:03,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:53:03,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:53:03,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:53:03,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:53:03,800 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:53:03,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:53:03,801 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:53:03,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:53:03,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:53:03,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:53:03,802 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:53:03,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:53:03,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:53:03,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:53:03,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:53:03,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:53:03,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:53:03,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:53:03,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:53:03,804 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 23:53:04,146 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:53:04,161 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:53:04,164 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:53:04,166 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:53:04,166 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:53:04,167 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label08.c [2019-10-14 23:53:04,249 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4df47d85/e5bff709a5db4eb7a746f7248bd740e9/FLAG3aff7548b [2019-10-14 23:53:04,848 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:53:04,848 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label08.c [2019-10-14 23:53:04,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4df47d85/e5bff709a5db4eb7a746f7248bd740e9/FLAG3aff7548b [2019-10-14 23:53:05,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4df47d85/e5bff709a5db4eb7a746f7248bd740e9 [2019-10-14 23:53:05,134 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:53:05,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:53:05,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:05,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:53:05,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:53:05,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:05" (1/1) ... [2019-10-14 23:53:05,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a4bcce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:05, skipping insertion in model container [2019-10-14 23:53:05,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:05" (1/1) ... [2019-10-14 23:53:05,164 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:53:05,232 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:53:05,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:05,672 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:53:05,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:05,890 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:53:05,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:05 WrapperNode [2019-10-14 23:53:05,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:05,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:53:05,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:53:05,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:53:05,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:05" (1/1) ... [2019-10-14 23:53:05,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:05" (1/1) ... [2019-10-14 23:53:05,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:05" (1/1) ... [2019-10-14 23:53:05,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:05" (1/1) ... [2019-10-14 23:53:05,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:05" (1/1) ... [2019-10-14 23:53:05,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:05" (1/1) ... [2019-10-14 23:53:06,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:05" (1/1) ... [2019-10-14 23:53:06,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:53:06,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:53:06,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:53:06,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:53:06,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:05" (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 23:53:06,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:53:06,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:53:06,065 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:53:06,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:53:06,065 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:53:06,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:53:06,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:53:06,066 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:53:06,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:53:06,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:53:06,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:53:07,310 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:53:07,314 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:53:07,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:07 BoogieIcfgContainer [2019-10-14 23:53:07,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:53:07,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:53:07,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:53:07,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:53:07,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:53:05" (1/3) ... [2019-10-14 23:53:07,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aedf517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:07, skipping insertion in model container [2019-10-14 23:53:07,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:05" (2/3) ... [2019-10-14 23:53:07,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aedf517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:07, skipping insertion in model container [2019-10-14 23:53:07,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:07" (3/3) ... [2019-10-14 23:53:07,328 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label08.c [2019-10-14 23:53:07,339 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:53:07,347 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:53:07,358 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:53:07,394 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:53:07,394 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:53:07,394 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:53:07,394 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:53:07,394 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:53:07,395 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:53:07,395 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:53:07,395 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:53:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:53:07,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-14 23:53:07,444 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:07,446 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] [2019-10-14 23:53:07,447 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:07,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:07,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1920403729, now seen corresponding path program 1 times [2019-10-14 23:53:07,462 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:07,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633462639] [2019-10-14 23:53:07,463 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:07,463 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:07,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:08,047 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 23:53:08,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633462639] [2019-10-14 23:53:08,050 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:08,050 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:08,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897100250] [2019-10-14 23:53:08,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:08,061 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:08,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:08,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:08,085 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:53:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:09,053 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:53:09,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:09,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 119 [2019-10-14 23:53:09,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:09,084 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:53:09,084 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:53:09,096 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 23:53:09,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:53:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:53:09,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:53:09,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-10-14 23:53:09,173 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 119 [2019-10-14 23:53:09,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:09,174 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-10-14 23:53:09,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:09,175 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-10-14 23:53:09,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-14 23:53:09,179 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:09,179 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] [2019-10-14 23:53:09,179 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:09,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:09,180 INFO L82 PathProgramCache]: Analyzing trace with hash 10659704, now seen corresponding path program 1 times [2019-10-14 23:53:09,180 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:09,180 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368948379] [2019-10-14 23:53:09,181 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:09,181 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:09,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:09,353 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 23:53:09,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368948379] [2019-10-14 23:53:09,354 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:09,354 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:53:09,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573129930] [2019-10-14 23:53:09,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:53:09,357 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:09,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:53:09,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:53:09,357 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-10-14 23:53:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:10,217 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-10-14 23:53:10,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:53:10,219 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-10-14 23:53:10,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:10,234 INFO L225 Difference]: With dead ends: 840 [2019-10-14 23:53:10,235 INFO L226 Difference]: Without dead ends: 568 [2019-10-14 23:53:10,237 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 23:53:10,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-14 23:53:10,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-10-14 23:53:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-10-14 23:53:10,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 785 transitions. [2019-10-14 23:53:10,324 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 785 transitions. Word has length 129 [2019-10-14 23:53:10,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:10,325 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 785 transitions. [2019-10-14 23:53:10,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:53:10,325 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 785 transitions. [2019-10-14 23:53:10,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-14 23:53:10,329 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:10,330 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] [2019-10-14 23:53:10,330 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:10,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:10,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1525536778, now seen corresponding path program 1 times [2019-10-14 23:53:10,331 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:10,331 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989743172] [2019-10-14 23:53:10,331 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:10,331 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:10,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:10,647 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 23:53:10,647 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989743172] [2019-10-14 23:53:10,648 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:10,648 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:53:10,648 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971285014] [2019-10-14 23:53:10,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:53:10,649 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:10,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:53:10,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:53:10,649 INFO L87 Difference]: Start difference. First operand 556 states and 785 transitions. Second operand 5 states. [2019-10-14 23:53:11,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:11,335 INFO L93 Difference]: Finished difference Result 1205 states and 1730 transitions. [2019-10-14 23:53:11,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:53:11,336 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-10-14 23:53:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:11,341 INFO L225 Difference]: With dead ends: 1205 [2019-10-14 23:53:11,341 INFO L226 Difference]: Without dead ends: 554 [2019-10-14 23:53:11,343 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 23:53:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-14 23:53:11,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-14 23:53:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-14 23:53:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 712 transitions. [2019-10-14 23:53:11,369 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 712 transitions. Word has length 130 [2019-10-14 23:53:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:11,370 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 712 transitions. [2019-10-14 23:53:11,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:53:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 712 transitions. [2019-10-14 23:53:11,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-14 23:53:11,373 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:11,373 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:11,373 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:11,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:11,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1052025540, now seen corresponding path program 1 times [2019-10-14 23:53:11,374 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:11,374 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46657793] [2019-10-14 23:53:11,374 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:11,375 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:11,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:11,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:11,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46657793] [2019-10-14 23:53:11,657 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:11,657 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:53:11,657 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279708050] [2019-10-14 23:53:11,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:53:11,658 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:11,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:53:11,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:53:11,659 INFO L87 Difference]: Start difference. First operand 554 states and 712 transitions. Second operand 5 states. [2019-10-14 23:53:12,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:12,211 INFO L93 Difference]: Finished difference Result 1184 states and 1552 transitions. [2019-10-14 23:53:12,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:53:12,214 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2019-10-14 23:53:12,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:12,218 INFO L225 Difference]: With dead ends: 1184 [2019-10-14 23:53:12,219 INFO L226 Difference]: Without dead ends: 554 [2019-10-14 23:53:12,221 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:53:12,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-14 23:53:12,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-14 23:53:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-14 23:53:12,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 708 transitions. [2019-10-14 23:53:12,244 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 708 transitions. Word has length 131 [2019-10-14 23:53:12,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:12,244 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 708 transitions. [2019-10-14 23:53:12,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:53:12,245 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 708 transitions. [2019-10-14 23:53:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 23:53:12,249 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:12,250 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] [2019-10-14 23:53:12,250 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:12,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:12,251 INFO L82 PathProgramCache]: Analyzing trace with hash -866015874, now seen corresponding path program 1 times [2019-10-14 23:53:12,251 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:12,251 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746521500] [2019-10-14 23:53:12,252 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:12,252 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:12,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:12,376 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 23:53:12,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746521500] [2019-10-14 23:53:12,377 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:12,377 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:12,377 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371402634] [2019-10-14 23:53:12,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:12,378 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:12,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:12,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:12,379 INFO L87 Difference]: Start difference. First operand 554 states and 708 transitions. Second operand 3 states. [2019-10-14 23:53:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:12,814 INFO L93 Difference]: Finished difference Result 1509 states and 1954 transitions. [2019-10-14 23:53:12,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:12,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2019-10-14 23:53:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:12,822 INFO L225 Difference]: With dead ends: 1509 [2019-10-14 23:53:12,822 INFO L226 Difference]: Without dead ends: 961 [2019-10-14 23:53:12,825 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 23:53:12,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2019-10-14 23:53:12,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2019-10-14 23:53:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2019-10-14 23:53:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1180 transitions. [2019-10-14 23:53:12,864 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1180 transitions. Word has length 134 [2019-10-14 23:53:12,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:12,865 INFO L462 AbstractCegarLoop]: Abstraction has 959 states and 1180 transitions. [2019-10-14 23:53:12,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:12,866 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1180 transitions. [2019-10-14 23:53:12,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-14 23:53:12,871 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:12,872 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:53:12,872 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:12,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:12,873 INFO L82 PathProgramCache]: Analyzing trace with hash -494413009, now seen corresponding path program 1 times [2019-10-14 23:53:12,873 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:12,874 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180425765] [2019-10-14 23:53:12,874 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:12,874 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:12,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:13,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180425765] [2019-10-14 23:53:13,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984257559] [2019-10-14 23:53:13,030 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 23:53:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:13,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:53:13,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:53:13,320 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:53:13,321 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:53:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:53:13,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [695485926] [2019-10-14 23:53:13,438 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 166 [2019-10-14 23:53:13,507 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:53:13,507 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)