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/Problem14_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:07:23,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:07:23,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:07:23,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:07:23,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:07:23,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:07:23,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:07:23,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:07:23,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:07:23,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:07:23,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:07:23,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:07:23,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:07:23,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:07:23,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:07:23,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:07:23,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:07:23,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:07:23,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:07:23,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:07:23,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:07:23,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:07:23,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:07:23,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:07:23,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:07:23,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:07:23,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:07:23,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:07:23,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:07:23,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:07:23,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:07:23,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:07:23,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:07:23,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:07:23,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:07:23,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:07:23,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:07:23,662 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:07:23,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:07:23,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:07:23,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:07:23,664 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:07:23,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:07:23,664 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:07:23,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:07:23,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:07:23,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:07:23,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:07:23,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:07:23,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:07:23,666 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:07:23,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:07:23,666 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:07:23,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:07:23,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:07:23,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:07:23,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:07:23,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:07:23,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:23,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:07:23,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:07:23,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:07:23,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:07:23,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:07:23,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:07:23,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:07:23,957 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:07:23,970 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:07:23,974 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:07:23,975 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:07:23,976 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:07:23,977 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label42.c [2019-10-13 20:07:24,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa97ffdc/8b179da9dd0c4547bcc3976d2c7b9313/FLAGad7cba9c5 [2019-10-13 20:07:24,642 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:07:24,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label42.c [2019-10-13 20:07:24,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa97ffdc/8b179da9dd0c4547bcc3976d2c7b9313/FLAGad7cba9c5 [2019-10-13 20:07:24,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa97ffdc/8b179da9dd0c4547bcc3976d2c7b9313 [2019-10-13 20:07:24,891 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:07:24,892 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:07:24,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:24,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:07:24,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:07:24,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:24" (1/1) ... [2019-10-13 20:07:24,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a8f9260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:24, skipping insertion in model container [2019-10-13 20:07:24,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:24" (1/1) ... [2019-10-13 20:07:24,910 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:07:24,960 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:07:25,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:25,550 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:07:25,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:25,706 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:07:25,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:25 WrapperNode [2019-10-13 20:07:25,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:25,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:07:25,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:07:25,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:07:25,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:25" (1/1) ... [2019-10-13 20:07:25,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:25" (1/1) ... [2019-10-13 20:07:25,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:25" (1/1) ... [2019-10-13 20:07:25,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:25" (1/1) ... [2019-10-13 20:07:25,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:25" (1/1) ... [2019-10-13 20:07:25,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:25" (1/1) ... [2019-10-13 20:07:25,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:25" (1/1) ... [2019-10-13 20:07:25,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:07:25,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:07:25,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:07:25,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:07:25,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:25,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:07:25,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:07:25,940 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:07:25,940 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:07:25,940 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:07:25,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:07:25,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:07:25,942 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:07:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:07:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:07:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:07:27,600 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:07:27,600 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:07:27,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:27 BoogieIcfgContainer [2019-10-13 20:07:27,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:07:27,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:07:27,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:07:27,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:07:27,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:07:24" (1/3) ... [2019-10-13 20:07:27,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fc2b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:27, skipping insertion in model container [2019-10-13 20:07:27,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:25" (2/3) ... [2019-10-13 20:07:27,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fc2b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:27, skipping insertion in model container [2019-10-13 20:07:27,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:27" (3/3) ... [2019-10-13 20:07:27,612 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label42.c [2019-10-13 20:07:27,621 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:07:27,631 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:07:27,644 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:07:27,676 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:07:27,676 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:07:27,676 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:07:27,677 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:07:27,677 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:07:27,677 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:07:27,677 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:07:27,677 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:07:27,714 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:07:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 20:07:27,726 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:27,727 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] [2019-10-13 20:07:27,729 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:27,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:27,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1174892051, now seen corresponding path program 1 times [2019-10-13 20:07:27,749 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:27,750 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275530899] [2019-10-13 20:07:27,750 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:27,750 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:27,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:28,110 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275530899] [2019-10-13 20:07:28,111 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:28,111 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:07:28,112 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639512491] [2019-10-13 20:07:28,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:07:28,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:28,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:07:28,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:28,139 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-13 20:07:29,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:29,490 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-13 20:07:29,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:07:29,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2019-10-13 20:07:29,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:29,512 INFO L225 Difference]: With dead ends: 688 [2019-10-13 20:07:29,512 INFO L226 Difference]: Without dead ends: 372 [2019-10-13 20:07:29,520 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:29,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-13 20:07:29,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-13 20:07:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-13 20:07:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-13 20:07:29,606 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 48 [2019-10-13 20:07:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:29,607 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-13 20:07:29,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:07:29,607 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-13 20:07:29,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 20:07:29,613 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:29,613 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:29,614 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:29,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:29,614 INFO L82 PathProgramCache]: Analyzing trace with hash -56716970, now seen corresponding path program 1 times [2019-10-13 20:07:29,615 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:29,615 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656603944] [2019-10-13 20:07:29,615 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:29,615 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:29,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:29,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656603944] [2019-10-13 20:07:29,949 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:29,949 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:07:29,949 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3255597] [2019-10-13 20:07:29,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:07:29,952 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:29,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:07:29,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:07:29,953 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-13 20:07:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:31,245 INFO L93 Difference]: Finished difference Result 936 states and 1526 transitions. [2019-10-13 20:07:31,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:07:31,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2019-10-13 20:07:31,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:31,251 INFO L225 Difference]: With dead ends: 936 [2019-10-13 20:07:31,251 INFO L226 Difference]: Without dead ends: 570 [2019-10-13 20:07:31,253 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 [2019-10-13 20:07:31,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-10-13 20:07:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2019-10-13 20:07:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-10-13 20:07:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions. [2019-10-13 20:07:31,284 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 134 [2019-10-13 20:07:31,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:31,285 INFO L462 AbstractCegarLoop]: Abstraction has 562 states and 814 transitions. [2019-10-13 20:07:31,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:07:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions. [2019-10-13 20:07:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 20:07:31,288 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:31,289 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:31,289 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:31,289 INFO L82 PathProgramCache]: Analyzing trace with hash -867586423, now seen corresponding path program 1 times [2019-10-13 20:07:31,290 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:31,290 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552987277] [2019-10-13 20:07:31,290 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:31,290 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:31,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:31,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552987277] [2019-10-13 20:07:31,414 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:31,414 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:31,414 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124204222] [2019-10-13 20:07:31,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:31,415 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:31,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:31,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:31,416 INFO L87 Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states. [2019-10-13 20:07:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:33,065 INFO L93 Difference]: Finished difference Result 2220 states and 3292 transitions. [2019-10-13 20:07:33,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:33,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2019-10-13 20:07:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:33,078 INFO L225 Difference]: With dead ends: 2220 [2019-10-13 20:07:33,078 INFO L226 Difference]: Without dead ends: 1664 [2019-10-13 20:07:33,080 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2019-10-13 20:07:33,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1664. [2019-10-13 20:07:33,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1664 states. [2019-10-13 20:07:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2287 transitions. [2019-10-13 20:07:33,210 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2287 transitions. Word has length 143 [2019-10-13 20:07:33,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:33,211 INFO L462 AbstractCegarLoop]: Abstraction has 1664 states and 2287 transitions. [2019-10-13 20:07:33,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:33,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2287 transitions. [2019-10-13 20:07:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-10-13 20:07:33,222 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:33,222 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:07:33,223 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:33,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:33,223 INFO L82 PathProgramCache]: Analyzing trace with hash -81866982, now seen corresponding path program 1 times [2019-10-13 20:07:33,224 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:33,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603542548] [2019-10-13 20:07:33,224 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:33,224 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:33,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 153 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:33,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603542548] [2019-10-13 20:07:33,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270389617] [2019-10-13 20:07:33,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:07:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:33,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:07:33,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:33,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-13 20:07:34,026 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:34,210 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:34,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:34,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:34,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:34,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:34,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 82 proven. 107 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:34,741 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:07:34,742 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2019-10-13 20:07:34,742 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034755747] [2019-10-13 20:07:34,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:07:34,744 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:34,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:07:34,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:07:34,746 INFO L87 Difference]: Start difference. First operand 1664 states and 2287 transitions. Second operand 5 states. [2019-10-13 20:07:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:36,161 INFO L93 Difference]: Finished difference Result 3726 states and 5163 transitions. [2019-10-13 20:07:36,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:07:36,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 271 [2019-10-13 20:07:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:36,175 INFO L225 Difference]: With dead ends: 3726 [2019-10-13 20:07:36,175 INFO L226 Difference]: Without dead ends: 2068 [2019-10-13 20:07:36,179 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 538 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-10-13 20:07:36,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2019-10-13 20:07:36,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1690. [2019-10-13 20:07:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2019-10-13 20:07:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2313 transitions. [2019-10-13 20:07:36,248 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2313 transitions. Word has length 271 [2019-10-13 20:07:36,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:36,249 INFO L462 AbstractCegarLoop]: Abstraction has 1690 states and 2313 transitions. [2019-10-13 20:07:36,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:07:36,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2313 transitions. [2019-10-13 20:07:36,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2019-10-13 20:07:36,258 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:36,258 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:36,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:07:36,463 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:36,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:36,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1471725011, now seen corresponding path program 1 times [2019-10-13 20:07:36,465 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:36,466 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74294591] [2019-10-13 20:07:36,466 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:36,467 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:36,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 209 proven. 189 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:37,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74294591] [2019-10-13 20:07:37,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868907418] [2019-10-13 20:07:37,556 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 [2019-10-13 20:07:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:37,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 20:07:37,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:37,733 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:07:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 307 proven. 53 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-13 20:07:37,975 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:38,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:07:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 131 proven. 267 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:38,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1954831000] [2019-10-13 20:07:38,649 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 356 [2019-10-13 20:07:38,702 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:07:38,702 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:07:51,416 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:07:51,419 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 484 root evaluator evaluations with a maximum evaluation depth of 13. Performed 484 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-13 20:07:51,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:51,424 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 20:07:57,370 INFO L227 lantSequenceWeakener]: Weakened 352 states. On average, predicates are now at 77.68% of their original sizes. [2019-10-13 20:07:57,370 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 20:07:57,448 INFO L553 sIntCurrentIteration]: We unified 354 AI predicates to 354 [2019-10-13 20:07:57,449 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 20:07:57,449 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 20:07:57,450 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 8, 8] total 29 [2019-10-13 20:07:57,450 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865829087] [2019-10-13 20:07:57,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 20:07:57,452 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:57,452 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 20:07:57,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 20:07:57,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:07:57,453 INFO L87 Difference]: Start difference. First operand 1690 states and 2313 transitions. Second operand 11 states.