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/Problem15_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:08:22,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:08:22,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:08:22,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:08:22,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:08:22,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:08:22,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:08:22,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:08:22,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:08:22,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:08:22,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:08:22,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:08:22,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:08:22,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:08:22,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:08:22,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:08:22,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:08:22,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:08:22,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:08:22,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:08:22,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:08:22,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:08:22,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:08:22,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:08:22,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:08:22,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:08:22,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:08:22,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:08:22,751 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 20:08:22,769 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:08:22,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:08:22,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:08:22,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:08:22,772 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:08:22,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:08:22,773 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:08:22,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:08:22,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:08:22,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:08:22,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:08:22,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:08:22,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:08:22,775 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:08:22,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:08:22,776 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:08:22,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:08:22,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:08:22,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:08:22,776 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:08:22,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:08:22,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:08:22,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:08:22,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:08:22,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:08:22,778 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:08:22,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:08:22,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:08:22,778 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 20:08:23,072 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:08:23,086 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:08:23,089 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:08:23,091 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:08:23,091 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:08:23,092 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label31.c [2019-10-13 20:08:23,169 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7e075bd7/5f77d66dd46847d9b6d9007e65dcd061/FLAG296a807c5 [2019-10-13 20:08:23,864 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:08:23,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label31.c [2019-10-13 20:08:23,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7e075bd7/5f77d66dd46847d9b6d9007e65dcd061/FLAG296a807c5 [2019-10-13 20:08:23,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7e075bd7/5f77d66dd46847d9b6d9007e65dcd061 [2019-10-13 20:08:23,986 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:08:23,987 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:08:23,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:08:23,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:08:23,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:08:23,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:23" (1/1) ... [2019-10-13 20:08:23,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d46bbee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:23, skipping insertion in model container [2019-10-13 20:08:23,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:23" (1/1) ... [2019-10-13 20:08:24,007 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:08:24,090 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:08:25,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:08:25,084 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:08:25,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:08:25,409 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:08:25,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25 WrapperNode [2019-10-13 20:08:25,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:08:25,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:08:25,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:08:25,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:08:25,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (1/1) ... [2019-10-13 20:08:25,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (1/1) ... [2019-10-13 20:08:25,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (1/1) ... [2019-10-13 20:08:25,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (1/1) ... [2019-10-13 20:08:25,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (1/1) ... [2019-10-13 20:08:25,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (1/1) ... [2019-10-13 20:08:25,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (1/1) ... [2019-10-13 20:08:25,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:08:25,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:08:25,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:08:25,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:08:25,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (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 20:08:25,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:08:25,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:08:25,686 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:08:25,686 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:08:25,687 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:08:25,687 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:08:25,687 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:08:25,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:08:25,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:08:25,688 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:08:25,688 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:08:25,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:08:25,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:08:29,187 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:08:29,187 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:08:29,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:29 BoogieIcfgContainer [2019-10-13 20:08:29,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:08:29,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:08:29,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:08:29,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:08:29,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:08:23" (1/3) ... [2019-10-13 20:08:29,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c77d8d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:29, skipping insertion in model container [2019-10-13 20:08:29,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:25" (2/3) ... [2019-10-13 20:08:29,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c77d8d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:29, skipping insertion in model container [2019-10-13 20:08:29,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:29" (3/3) ... [2019-10-13 20:08:29,197 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label31.c [2019-10-13 20:08:29,207 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:08:29,216 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:08:29,227 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:08:29,259 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:08:29,259 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:08:29,260 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:08:29,260 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:08:29,260 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:08:29,260 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:08:29,260 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:08:29,260 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:08:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-13 20:08:29,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-13 20:08:29,299 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:29,300 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] [2019-10-13 20:08:29,302 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:29,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2120890949, now seen corresponding path program 1 times [2019-10-13 20:08:29,317 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:29,318 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625424022] [2019-10-13 20:08:29,318 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:29,318 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:29,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:29,660 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 20:08:29,660 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625424022] [2019-10-13 20:08:29,661 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:29,662 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:08:29,662 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098432609] [2019-10-13 20:08:29,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:08:29,669 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:29,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:08:29,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:29,687 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-13 20:08:33,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:33,879 INFO L93 Difference]: Finished difference Result 1554 states and 2845 transitions. [2019-10-13 20:08:33,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:08:33,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2019-10-13 20:08:33,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:33,909 INFO L225 Difference]: With dead ends: 1554 [2019-10-13 20:08:33,909 INFO L226 Difference]: Without dead ends: 1036 [2019-10-13 20:08:33,921 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 20:08:33,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-10-13 20:08:34,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 697. [2019-10-13 20:08:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-13 20:08:34,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1188 transitions. [2019-10-13 20:08:34,032 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1188 transitions. Word has length 71 [2019-10-13 20:08:34,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:34,033 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1188 transitions. [2019-10-13 20:08:34,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:08:34,033 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1188 transitions. [2019-10-13 20:08:34,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 20:08:34,041 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:34,041 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:08:34,042 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:34,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:34,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1052620642, now seen corresponding path program 1 times [2019-10-13 20:08:34,043 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:34,043 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936205375] [2019-10-13 20:08:34,043 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:34,043 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:34,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:34,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936205375] [2019-10-13 20:08:34,305 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:34,305 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:08:34,308 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789620338] [2019-10-13 20:08:34,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:08:34,315 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:34,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:08:34,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:34,318 INFO L87 Difference]: Start difference. First operand 697 states and 1188 transitions. Second operand 4 states. [2019-10-13 20:08:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:37,951 INFO L93 Difference]: Finished difference Result 2627 states and 4583 transitions. [2019-10-13 20:08:37,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:08:37,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-13 20:08:37,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:37,961 INFO L225 Difference]: With dead ends: 2627 [2019-10-13 20:08:37,961 INFO L226 Difference]: Without dead ends: 1936 [2019-10-13 20:08:37,965 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 20:08:37,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2019-10-13 20:08:38,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1933. [2019-10-13 20:08:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1933 states. [2019-10-13 20:08:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 2950 transitions. [2019-10-13 20:08:38,049 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 2950 transitions. Word has length 140 [2019-10-13 20:08:38,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:38,050 INFO L462 AbstractCegarLoop]: Abstraction has 1933 states and 2950 transitions. [2019-10-13 20:08:38,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:08:38,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 2950 transitions. [2019-10-13 20:08:38,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-13 20:08:38,057 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:38,058 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:08:38,058 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:38,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:38,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1486343896, now seen corresponding path program 1 times [2019-10-13 20:08:38,059 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:38,059 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532109991] [2019-10-13 20:08:38,059 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:38,059 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:38,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:38,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532109991] [2019-10-13 20:08:38,268 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:38,269 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:08:38,269 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599311958] [2019-10-13 20:08:38,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:08:38,270 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:38,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:08:38,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:08:38,271 INFO L87 Difference]: Start difference. First operand 1933 states and 2950 transitions. Second operand 5 states. [2019-10-13 20:08:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:42,889 INFO L93 Difference]: Finished difference Result 5794 states and 9031 transitions. [2019-10-13 20:08:42,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:08:42,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2019-10-13 20:08:42,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:42,911 INFO L225 Difference]: With dead ends: 5794 [2019-10-13 20:08:42,911 INFO L226 Difference]: Without dead ends: 3867 [2019-10-13 20:08:42,918 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:08:42,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2019-10-13 20:08:43,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3830. [2019-10-13 20:08:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3830 states. [2019-10-13 20:08:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 5188 transitions. [2019-10-13 20:08:43,032 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 5188 transitions. Word has length 187 [2019-10-13 20:08:43,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:43,033 INFO L462 AbstractCegarLoop]: Abstraction has 3830 states and 5188 transitions. [2019-10-13 20:08:43,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:08:43,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 5188 transitions. [2019-10-13 20:08:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2019-10-13 20:08:43,046 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:43,046 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:08:43,046 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:43,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:43,047 INFO L82 PathProgramCache]: Analyzing trace with hash 91616955, now seen corresponding path program 1 times [2019-10-13 20:08:43,047 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:43,047 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510663162] [2019-10-13 20:08:43,048 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:43,048 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:43,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 331 proven. 98 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 20:08:44,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510663162] [2019-10-13 20:08:44,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622791861] [2019-10-13 20:08:44,253 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 20:08:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:44,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 20:08:44,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:08:44,541 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:08:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-13 20:08:44,787 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:08:44,908 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:44,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:44,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:44,963 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:44,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:45,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 192 proven. 170 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-10-13 20:08:45,866 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:08:45,867 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2019-10-13 20:08:45,867 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398623090] [2019-10-13 20:08:45,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:08:45,868 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:45,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:08:45,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-10-13 20:08:45,868 INFO L87 Difference]: Start difference. First operand 3830 states and 5188 transitions. Second operand 5 states. [2019-10-13 20:08:51,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:51,589 INFO L93 Difference]: Finished difference Result 8052 states and 10905 transitions. [2019-10-13 20:08:51,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:08:51,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2019-10-13 20:08:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:51,613 INFO L225 Difference]: With dead ends: 8052 [2019-10-13 20:08:51,614 INFO L226 Difference]: Without dead ends: 4228 [2019-10-13 20:08:51,623 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 917 GetRequests, 898 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-13 20:08:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4228 states. [2019-10-13 20:08:51,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4228 to 3877. [2019-10-13 20:08:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3877 states. [2019-10-13 20:08:51,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3877 states to 3877 states and 5251 transitions. [2019-10-13 20:08:51,747 INFO L78 Accepts]: Start accepts. Automaton has 3877 states and 5251 transitions. Word has length 449 [2019-10-13 20:08:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:51,749 INFO L462 AbstractCegarLoop]: Abstraction has 3877 states and 5251 transitions. [2019-10-13 20:08:51,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:08:51,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3877 states and 5251 transitions. [2019-10-13 20:08:51,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2019-10-13 20:08:51,766 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:51,767 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:08:51,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:08:51,981 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:51,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:51,982 INFO L82 PathProgramCache]: Analyzing trace with hash 2070901156, now seen corresponding path program 1 times [2019-10-13 20:08:51,982 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:51,982 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737147769] [2019-10-13 20:08:51,982 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:51,982 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:51,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 310 proven. 63 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 20:08:52,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737147769] [2019-10-13 20:08:52,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206523907] [2019-10-13 20:08:52,742 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 [2019-10-13 20:08:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:52,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:08:52,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:08:52,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:08:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 383 proven. 2 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-13 20:08:53,100 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:08:53,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:53,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 274 proven. 80 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-13 20:08:53,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [777406514] [2019-10-13 20:08:53,498 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 524 [2019-10-13 20:08:53,561 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:08:53,561 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)