java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:57:02,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:57:02,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:57:02,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:57:02,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:57:02,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:57:02,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:57:02,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:57:02,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:57:02,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:57:02,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:57:02,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:57:02,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:57:02,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:57:02,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:57:02,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:57:02,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:57:02,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:57:02,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:57:02,722 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:57:02,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:57:02,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:57:02,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:57:02,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:57:02,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:57:02,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:57:02,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:57:02,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:57:02,744 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 23:57:02,761 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:57:02,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:57:02,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:57:02,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:57:02,764 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:57:02,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:57:02,764 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:57:02,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:57:02,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:57:02,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:57:02,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:57:02,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:57:02,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:57:02,767 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:57:02,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:57:02,767 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:57:02,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:57:02,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:57:02,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:57:02,768 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:57:02,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:57:02,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:57:02,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:57:02,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:57:02,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:57:02,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:57:02,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:57:02,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:57:02,770 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 23:57:03,075 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:57:03,097 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:57:03,102 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:57:03,104 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:57:03,104 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:57:03,105 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label35.c [2019-10-14 23:57:03,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63a169080/73c16cf3e7f442db99b368fbf5f4fd54/FLAGab5dfc69a [2019-10-14 23:57:03,731 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:57:03,732 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label35.c [2019-10-14 23:57:03,743 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63a169080/73c16cf3e7f442db99b368fbf5f4fd54/FLAGab5dfc69a [2019-10-14 23:57:04,007 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63a169080/73c16cf3e7f442db99b368fbf5f4fd54 [2019-10-14 23:57:04,017 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:57:04,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:57:04,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:57:04,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:57:04,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:57:04,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:04" (1/1) ... [2019-10-14 23:57:04,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc444e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:04, skipping insertion in model container [2019-10-14 23:57:04,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:04" (1/1) ... [2019-10-14 23:57:04,035 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:57:04,092 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:57:04,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:57:04,628 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:57:04,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:57:04,773 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:57:04,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:04 WrapperNode [2019-10-14 23:57:04,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:57:04,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:57:04,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:57:04,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:57:04,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:04" (1/1) ... [2019-10-14 23:57:04,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:04" (1/1) ... [2019-10-14 23:57:04,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:04" (1/1) ... [2019-10-14 23:57:04,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:04" (1/1) ... [2019-10-14 23:57:04,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:04" (1/1) ... [2019-10-14 23:57:04,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:04" (1/1) ... [2019-10-14 23:57:04,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:04" (1/1) ... [2019-10-14 23:57:04,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:57:04,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:57:04,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:57:04,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:57:04,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:04" (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 23:57:04,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:57:04,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:57:04,947 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:57:04,947 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:57:04,947 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:57:04,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:57:04,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:57:04,948 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:57:04,948 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:57:04,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:57:04,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:57:06,126 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:57:06,127 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:57:06,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:06 BoogieIcfgContainer [2019-10-14 23:57:06,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:57:06,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:57:06,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:57:06,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:57:06,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:57:04" (1/3) ... [2019-10-14 23:57:06,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d0ee587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:06, skipping insertion in model container [2019-10-14 23:57:06,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:04" (2/3) ... [2019-10-14 23:57:06,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d0ee587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:06, skipping insertion in model container [2019-10-14 23:57:06,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:06" (3/3) ... [2019-10-14 23:57:06,147 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label35.c [2019-10-14 23:57:06,158 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:57:06,167 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:57:06,179 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:57:06,210 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:57:06,211 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:57:06,211 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:57:06,211 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:57:06,211 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:57:06,212 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:57:06,212 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:57:06,212 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:57:06,246 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:57:06,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-14 23:57:06,257 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:06,258 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] [2019-10-14 23:57:06,260 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:06,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:06,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1838417414, now seen corresponding path program 1 times [2019-10-14 23:57:06,273 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:06,273 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303805490] [2019-10-14 23:57:06,273 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:06,273 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:06,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:06,693 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 23:57:06,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303805490] [2019-10-14 23:57:06,694 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:06,695 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:57:06,695 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511348250] [2019-10-14 23:57:06,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:57:06,702 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:06,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:57:06,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:57:06,720 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:57:07,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:07,770 INFO L93 Difference]: Finished difference Result 624 states and 1069 transitions. [2019-10-14 23:57:07,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:57:07,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2019-10-14 23:57:07,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:07,801 INFO L225 Difference]: With dead ends: 624 [2019-10-14 23:57:07,801 INFO L226 Difference]: Without dead ends: 326 [2019-10-14 23:57:07,813 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 23:57:07,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-10-14 23:57:07,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 321. [2019-10-14 23:57:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-10-14 23:57:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 467 transitions. [2019-10-14 23:57:07,936 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 467 transitions. Word has length 100 [2019-10-14 23:57:07,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:07,939 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 467 transitions. [2019-10-14 23:57:07,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:57:07,941 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 467 transitions. [2019-10-14 23:57:07,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-14 23:57:07,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:07,959 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:57:07,959 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:07,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:07,960 INFO L82 PathProgramCache]: Analyzing trace with hash 937720225, now seen corresponding path program 1 times [2019-10-14 23:57:07,962 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:07,963 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000294819] [2019-10-14 23:57:07,963 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:07,963 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:07,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:08,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000294819] [2019-10-14 23:57:08,103 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:08,103 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:57:08,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398023388] [2019-10-14 23:57:08,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:57:08,105 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:08,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:57:08,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:57:08,106 INFO L87 Difference]: Start difference. First operand 321 states and 467 transitions. Second operand 3 states. [2019-10-14 23:57:08,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:08,699 INFO L93 Difference]: Finished difference Result 927 states and 1371 transitions. [2019-10-14 23:57:08,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:57:08,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2019-10-14 23:57:08,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:08,706 INFO L225 Difference]: With dead ends: 927 [2019-10-14 23:57:08,706 INFO L226 Difference]: Without dead ends: 612 [2019-10-14 23:57:08,708 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 23:57:08,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-10-14 23:57:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-10-14 23:57:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-14 23:57:08,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 797 transitions. [2019-10-14 23:57:08,737 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 797 transitions. Word has length 108 [2019-10-14 23:57:08,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:08,738 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 797 transitions. [2019-10-14 23:57:08,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:57:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 797 transitions. [2019-10-14 23:57:08,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-14 23:57:08,741 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:08,741 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:57:08,742 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:08,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:08,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1220059375, now seen corresponding path program 1 times [2019-10-14 23:57:08,743 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:08,743 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956653655] [2019-10-14 23:57:08,743 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:08,743 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:08,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:08,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956653655] [2019-10-14 23:57:08,869 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:08,869 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:57:08,869 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896953135] [2019-10-14 23:57:08,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:57:08,872 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:08,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:57:08,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:57:08,873 INFO L87 Difference]: Start difference. First operand 612 states and 797 transitions. Second operand 3 states. [2019-10-14 23:57:09,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:09,586 INFO L93 Difference]: Finished difference Result 1794 states and 2385 transitions. [2019-10-14 23:57:09,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:57:09,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2019-10-14 23:57:09,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:09,605 INFO L225 Difference]: With dead ends: 1794 [2019-10-14 23:57:09,605 INFO L226 Difference]: Without dead ends: 1188 [2019-10-14 23:57:09,610 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 23:57:09,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2019-10-14 23:57:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1044. [2019-10-14 23:57:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1044 states. [2019-10-14 23:57:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1361 transitions. [2019-10-14 23:57:09,675 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1361 transitions. Word has length 113 [2019-10-14 23:57:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:09,676 INFO L462 AbstractCegarLoop]: Abstraction has 1044 states and 1361 transitions. [2019-10-14 23:57:09,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:57:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1361 transitions. [2019-10-14 23:57:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-14 23:57:09,681 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:09,681 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 23:57:09,682 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:09,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1877121071, now seen corresponding path program 1 times [2019-10-14 23:57:09,682 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:09,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801246419] [2019-10-14 23:57:09,683 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:09,683 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:09,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:57:09,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801246419] [2019-10-14 23:57:09,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848897822] [2019-10-14 23:57:09,838 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 23:57:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:09,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:57:09,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:57:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:57:10,053 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:57:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:57:10,183 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:57:10,183 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2019-10-14 23:57:10,183 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974128832] [2019-10-14 23:57:10,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:57:10,186 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:10,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:57:10,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:57:10,187 INFO L87 Difference]: Start difference. First operand 1044 states and 1361 transitions. Second operand 4 states. [2019-10-14 23:57:11,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:11,176 INFO L93 Difference]: Finished difference Result 3955 states and 5339 transitions. [2019-10-14 23:57:11,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:57:11,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2019-10-14 23:57:11,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:11,205 INFO L225 Difference]: With dead ends: 3955 [2019-10-14 23:57:11,205 INFO L226 Difference]: Without dead ends: 2917 [2019-10-14 23:57:11,209 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:57:11,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2019-10-14 23:57:11,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2916. [2019-10-14 23:57:11,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2916 states. [2019-10-14 23:57:11,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 3757 transitions. [2019-10-14 23:57:11,361 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 3757 transitions. Word has length 144 [2019-10-14 23:57:11,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:11,361 INFO L462 AbstractCegarLoop]: Abstraction has 2916 states and 3757 transitions. [2019-10-14 23:57:11,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:57:11,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 3757 transitions. [2019-10-14 23:57:11,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-14 23:57:11,372 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:11,372 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:57:11,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:57:11,578 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:11,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:11,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1338575403, now seen corresponding path program 1 times [2019-10-14 23:57:11,579 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:11,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504258854] [2019-10-14 23:57:11,579 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:11,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:11,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 44 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:11,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504258854] [2019-10-14 23:57:11,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172675837] [2019-10-14 23:57:11,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:57:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:11,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:57:11,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:57:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:11,905 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:57:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:12,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [355511178] [2019-10-14 23:57:12,012 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 150 [2019-10-14 23:57:12,064 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:57:12,064 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)